HomeMy WebLinkAboutBID - 7511 PORTNER SUBSTATION LANDSCAPING (3)INVITATION TO BID
7511 PORTNER SUBSTATION LANDSCAPING
BID OPENING: 3:00 P.M. (our clock), JUNE 14, 2013
The City of Fort Collins is requesting bids from firms for landscaping at the new Portner
Substation located at 6561 Portner Drive, Fort Collins. Work includes, but is not limited to,
construction/installation of the following: site earthwork, irrigation system and landscaping.
Sealed bids will be received and publicly opened at the office of the Director of Purchasing and
Risk Management, PO Box 580, 215 North Mason St., 2nd floor, Fort Collins, Colorado 80522,
at the time and date noted on the bid proposal and/or contract documents. If delivered, they are
to be sent to 215 North Mason Street, 2nd Floor, Fort Collins, Colorado 80524. If mailed, the
address is P.O. Box 580, Fort Collins, 80522-0580.
Bids must be received at the Purchasing Office prior to 3:00 p.m. (our clock), June 14,
2013.
The City encourages all disadvantaged business enterprises to submit bid in response to all
invitations and will not be discriminated against on the grounds of race, color, national origin.
A MANDATORY prebid conference and job walk with representatives of prospective
Bidders will be held at 10:00 AM, on June 5, 2013, at the site, 6561 Portner Drive, Fort
Collins, CO. Please meet at the corner of Tribly and Portner road and park on the west
side of Portner.
Questions concerning the scope of the bid should be directed to Project Manager, Jack Everett
at (970) 224-6051 or jeverett@fcgov.com.
Questions regarding bid submittal or process should be directed to John Stephen,
CPPO, LEED AP, Senior Buyer at (970) 221-6777 or jstephen@fcgov.com.
A copy of the Bid may be obtained as follows:
1. Download the Bid from the Purchasing Webpage, Current Bids page, at:
http://fcgov.com/eprocurement
Special Instructions
All bids must be properly signed by an authorized representative of the company with the legal
capacity to bind the company to the agreement. Bids may be withdrawn up to the date and hour
set for closing. Once bids have been accepted by the City and closing has occurred, failure to
enter into contract or honor the purchase order will be cause for removal of supplier's name
from the City of Fort Collins' bidders list for a period of twelve months from the date of the
opening. The City may also pursue any remedies available at law or in equity. Bid prices must
be held firm for a period of forty-five (45) days after bid openings.
Submission of a bid is deemed as acceptance of all terms, conditions and specifications
contained in the City's specifications initially provided to the bidder. Any proposed modification
Financial Services
Purchasing Division
215 N. Mason St. 2nd Floor
PO Box 580
Fort Collins, CO 80522
970.221.6775
970.221.6707
fcgov.com/purchasing
must be accepted in writing by the City prior to award of the bid.
Only bids properly received by the Purchasing Office will be accepted. All bids should be clearly
identified by the bid number and bid name contained in the bid proposal.
No proposal will be accepted from, or any purchase order awarded, to any person, firm or
corporation in default on any obligation to the City.
Bids must be furnished exclusive of any federal excise tax, wherever applicable.
Bidders must be properly licensed and secure necessary permits wherever applicable.
Bidders not responding to this bid will be removed from our automated vendor listing for the
subject commodities.
The City may elect where applicable, to award bids on an individual item/group basis or on a
total bid basis, whichever is most beneficial to the City. The City reserves the right to accept or
reject any and all bids, and to waive any irregularities or informalities.
Sales prohibited/conflict of interest: no officer, employee, or member of City Council, shall have
a financial interest in the sale to the City of any real or personal property, equipment, material,
supplies or services where such officer or employee exercises directly or indirectly any decision-
making authority concerning such sale or any supervisory authority over the services to be
rendered. This rule also applies to subcontracts with the City. Soliciting or accepting any gift,
gratuity, favor, entertainment, kickback or any items of monetary value from any person who
has or is seeking to do business with the City of Fort Collins is prohibited.
Freight terms: unless otherwise noted, all freight is F.O.B. Destination, Freight Prepaid. All
freight charges must be included in prices submitted on proposal.
Discounts: any discounts allowed for prompt payment, etc., must be reflected in bid figures and
not entered as separate pricing on the proposal form.
Purchasing restrictions: your authorized signature of this bid assures your firm's compliance
with the City's purchasing restrictions. A copy of the resolutions is available for review in the
Purchasing Office or the City Clerk's Office. Request Resolution 91-121 for cement restrictions.
Collusive or sham bids: any bid deemed to be collusive or a sham bid will be rejected and
reported to authorities as such. Your authorized signature of this bid assures that such bid is
genuine and is not a collusive or sham bid.
Bid results: for information regarding results for individual bids send a self-addressed,
self-stamped envelope and a bid tally will be mailed to you. Bid results will be posted in our
office 7 days after the bid opening.
Gerry S. Paul
Director of Purchasing and Risk Management
7511 PORTNER SUBSTATION LANDSCAPING
BID OPENING: 3:00 p.m. (our clock), June 14, 2013
WE HEREBY ENTER OUR BID FOR THE CITY OF FORT COLLINS' REQUIREMENTS FOR
7511 Portner Substation Landscaping PER THE BID INVITATION AND ANY REFERENCED
SPECIFICATIONS:
The City of Fort Collins is requesting bids for 7511 Portner Substation Landscaping located at
the new Portner Substation, 6561 Portner Drive, Fort Collins, CO. Work includes, but is not
limited to, construction/installation of the following: site earthwork, irrigation system and
landscaping. The site earthwork including berm filling, contouring and fine grading will be
required. Landscaping will include topsoil, compost in sod areas, low water plant palette, buffalo
blend sod, weed barrier, 1.5’-2” tan Poudre river rock, 3”-6” Rose rip rap and steel edger.
Project specifications, requirements and drawings are included at the end of this bid invitation
package.
Work shall be completed within sixty (60) calendar days following authorization by the City to
begin work.
Awarded service provider must enter into a service agreement (sample attached for your
review) and provide the required insurance (Exhibit B).
BID SCHEDULE – 7511 PORTNER SUBSTATION LANDSCAPING
IN WORDS:
SUBMITTED BY:
PRINTED: DATE:
COMPANY:
ADDRESS:
CITY, STATE, ZIP:
PHONE: EMAIL:
1 Demolition - clear and grub SF 17,120 $ -
$ -
2 Berm Fill and Contouring LS 1 $ -
3 Fine Grading SF 30,120 $ -
4 Topsoil Import (4" Thick) SF 5,200 $ -
5 Compost in Sod Areas (3 yards per 1,000 square feet) SF 17,000 $ -
6 Buffalo Blend Sod SF 17,000 $ -
7 Deciduous Shrubs - 5 gal. EA 137 $ -
8 Evergreen Shrubs - 5 gal. EA 18 $ -
9 Ornamental Grasses - 1 gal. EA 77 $ -
10 Evergreen Trees 6' h. (Junipers) EA 9 $ -
11 Evergreen Trees 6' h. EA 5 $ -
12 Evergreen Trees 8' h. EA 4 $ -
13 Weed Barrier (Shrub Beds and 3' Fence Section) SF 13,240
14 Type 1 Mulch - (1.5-2" Tan Poudre River Rock) SF 13,120 $ -
15 Type 2 Mulch - (3"-6" Rose rip rap) SF 120 $ -
17 Steel Edger LF 900 $ -
18 Irrigation LS 1 $ -
$ -
Subtotal
Subtotal
SITE & LANDSCAPE
GENERAL REQUIREMENTS
TOTAL
ITEMDESCRIPTION UNIT QTY. UNIT PRICE ITEM TOTAL
SERVICES AGREEMENT
THIS AGREEMENT made and entered into the day and year set forth below by and
between THE CITY OF FORT COLLINS, COLORADO, a Municipal Corporation, hereinafter
referred to as the "City" and , hereinafter referred to as "Service Provider".
WITNESSETH:
In consideration of the mutual covenants and obligations herein expressed, it is agreed
by and between the parties hereto as follows:
1. Scope of Services. The Service Provider agrees to provide services in
accordance with the scope of services attached hereto as Exhibit "A", consisting of
( ) page and incorporated herein by this reference.
2. The Work Schedule. [Optional] The services to be performed pursuant to this
Agreement shall be performed in accordance with the Work Schedule attached hereto as
Exhibit "B", consisting of ( ) page , and incorporated herein by this reference.
3. Time of Commencement and Completion of Services. The services to be
performed pursuant to this Agreement shall be initiated within ( ) days following
execution of this Agreement. Services shall be completed no later than . Time is of the
essence. Any extensions of the time limit set forth above must be agreed upon in a writing
signed by the parties.
4. Contract Period. [Option 1] This Agreement shall commence upon the date of
execution shown on the signature page of this Agreement and shall continue in full force and
effect for one (1) year, unless sooner terminated as herein provided. In addition, at the option of
the City, the Agreement may be extended for an additional period of one (1) year at the rates
provided with written notice to the Professional mailed no later than ninety (90) days prior to
contract end.
5. Contract Period. [Option 2] This Agreement shall commence , 200 ,
and shall continue in full force and effect until , 200 , unless sooner terminated as
herein provided. In addition, at the option of the City, the Agreement may be extended for
additional one year periods not to exceed ( ) additional one year periods.
Renewals and pricing changes shall be negotiated by and agreed to by both parties. The
Denver Boulder Greeley CPIU published by the Colorado State Planning and Budget Office will
be used as a guide. Written notice of renewal shall be provided to the Service Provider and
mailed no later than ninety (90) days prior to contract end.
6. Delay. If either party is prevented in whole or in part from performing its
obligations by unforeseeable causes beyond its reasonable control and without its fault or
negligence, then the party so prevented shall be excused from whatever performance is
prevented by such cause. To the extent that the performance is actually prevented, the Service
Provider must provide written notice to the City of such condition within fifteen (15) days from
the onset of such condition. [Early Termination clause here as an option
7. Early Termination by City/Notice. Notwithstanding the time periods contained
herein, the City may terminate this Agreement at any time without cause by providing written
notice of termination to the Service Provider. Such notice shall be delivered at least fifteen (15)
days prior to the termination date contained in said notice unless otherwise agreed in writing by
the parties. All notices provided under this Agreement shall be effective when mailed, postage
prepaid and sent to the following addresses:
City:
City of Fort Collins
Attn: Purchasing
PO Box 580
Fort Collins, CO 80522
Copy to:
City of Fort Collins
Attn:
PO Box 580
Fort Collins, CO 80522
Service Provider:
Attn:
In the event of early termination by the City, the Service Provider shall be paid for services
rendered to the date of termination, subject only to the satisfactory performance of the Service
Provider's obligations under this Agreement. Such payment shall be the Service Provider's sole
right and remedy for such termination.
8. Contract Sum. The City shall pay the Service Provider for the performance of this
Contract, subject to additions and deletions provided herein, ($ ) as per the
attached Exhibit " ", consisting of page , and incorporated herein by this
reference.
9. City Representative. The City will designate, prior to commencement of the
work, its representative who shall make, within the scope of his or her authority, all necessary
and proper decisions with reference to the services provided under this agreement. All requests
concerning this agreement shall be directed to the City Representative.
10. Independent Service provider. The services to be performed by Service Provider
are those of an independent service provider and not of an employee of the City of Fort Collins.
The City shall not be responsible for withholding any portion of Service Provider's compensation
hereunder for the payment of FICA, Workmen's Compensation or other taxes or benefits or for
any other purpose.
11. Personal Services. It is understood that the City enters into the Agreement
based on the special abilities of the Service Provider and that this Agreement shall be
considered as an agreement for personal services. Accordingly, the Service Provider shall
neither assign any responsibilities nor delegate any duties arising under the Agreement without
the prior written consent of the City.
12. Acceptance Not Waiver. The City's approval or acceptance of, or payment for
any of the services shall not be construed to operate as a waiver of any rights or benefits
provided to the City under this Agreement or cause of action arising out of performance of this
Agreement.
13. Warranty.
a. Service Provider warrants that all work performed hereunder shall be
performed with the highest degree of competence and care in accordance with accepted
standards for work of a similar nature.
b. Unless otherwise provided in the Agreement, all materials and equipment
incorporated into any work shall be new and, where not specified, of the most suitable grade of
their respective kinds for their intended use, and all workmanship shall be acceptable to City.
c. Service Provider warrants all equipment, materials, labor and other work,
provided under this Agreement, except City-furnished materials, equipment and labor, against
defects and nonconformances in design, materials and workmanship/workwomanship for a
period beginning with the start of the work and ending twelve (12) months from and after final
acceptance under the Agreement, regardless whether the same were furnished or performed by
Service Provider or by any of its subcontractors of any tier. Upon receipt of written notice from
City of any such defect or nonconformances, the affected item or part thereof shall be
redesigned, repaired or replaced by Service Provider in a manner and at a time acceptable to
City.
14. Default. Each and every term and condition hereof shall be deemed to be a
material element of this Agreement. In the event either party should fail or refuse to perform
according to the terms of this agreement, such party may be declared in default thereof.
15. Remedies. In the event a party has been declared in default, such defaulting
party shall be allowed a period of ten (10) days within which to cure said default. In the event
the default remains uncorrected, the party declaring default may elect to (a) terminate the
Agreement and seek damages; (b) treat the Agreement as continuing and require specific
performance; or (c) avail himself of any other remedy at law or equity. If the non-defaulting party
commences legal or equitable actions against the defaulting party, the defaulting party shall be
liable to the non-defaulting party for the non-defaulting party's reasonable attorney fees and
costs incurred because of the default.
16. Binding Effect. This writing, together with the exhibits hereto, constitutes the
entire agreement between the parties and shall be binding upon said parties, their officers,
employees, agents and assigns and shall inure to the benefit of the respective survivors, heirs,
personal representatives, successors and assigns of said parties.
17. Indemnity/Insurance.
a. The Service Provider agrees to indemnify and save harmless the City, its
officers, agents and employees against and from any and all actions, suits, claims, demands or
liability of any character whatsoever brought or asserted for injuries to or death of any person or
persons, or damages to property arising out of, result from or occurring in connection with the
performance of any service hereunder.
b. The Service Provider shall take all necessary precautions in performing the
work hereunder to prevent injury to persons and property.
c. Without limiting any of the Service Provider's obligations hereunder, the
Service Provider shall provide and maintain insurance coverage naming the City as an
additional insured under this Agreement of the type and with the limits specified within Exhibit
, consisting of one (1) page, attached hereto and incorporated herein by this reference.
The Service Provider before commencing services hereunder, shall deliver to the City's Director
of Purchasing and Risk Management, P. O. Box 580 Fort Collins, Colorado 80522 one copy of
a certificate evidencing the insurance coverage required from an insurance company acceptable
to the City.
18. Entire Agreement. This Agreement, along with all Exhibits and other documents
incorporated herein, shall constitute the entire Agreement of the parties. Covenants or
representations not contained in this Agreement shall not be binding on the parties.
19. Law/Severability. The laws of the State of Colorado shall govern the construction
interpretation, execution and enforcement of this Agreement. In the event any provision of this
Agreement shall be held invalid or unenforceable by any court of competent jurisdiction, such
holding shall not invalidate or render unenforceable any other provision of this Agreement.
20. Prohibition Against Employing Illegal Aliens. Pursuant to Section 8-17.5-101,
C.R.S., et. seq., Service Provider represents and agrees that:
a. As of the date of this Agreement:
1. Service Provider does not knowingly employ or contract with an illegal
alien who will perform work under this Agreement; and
2. Service Provider will participate in either the e-Verify program created
in
Public Law 208, 104th Congress, as amended, and expanded in Public Law 156, 108th
Congress, as amended, administered by the United States Department of Homeland Security
(the “e-Verify Program”) or the Department Program (the “Department Program”), an
employment verification program established pursuant to Section 8-17.5-102(5)(c) C.R.S. in
order to confirm the employment eligibility of all newly hired employees to perform work under
this Agreement.
b. Service Provider shall not knowingly employ or contract with an illegal alien to
perform work under this Agreement or knowingly enter into a contract with a subcontractor that
knowingly employs or contracts with an illegal alien to perform work under this Agreement.
c. Service Provider is prohibited from using the e-Verify Program or Department
Program procedures to undertake pre-employment screening of job applicants while this
Agreement is being performed.
d. If Service Provider obtains actual knowledge that a subcontractor performing
work under this Agreement knowingly employs or contracts with an illegal alien, Service
Provider shall:
1. Notify such subcontractor and the City within three days that Service Provider
has actual knowledge that the subcontractor is employing or contracting with an illegal alien;
and
2. Terminate the subcontract with the subcontractor if within three days of
receiving the notice required pursuant to this section the subcontractor does not cease
employing or contracting with the illegal alien; except that Service Provider shall not terminate
the contract with the subcontractor if during such three days the subcontractor provides
information to establish that the subcontractor has not knowingly employed or contracted with
an illegal alien.
e. Service Provider shall comply with any reasonable request by the Colorado
Department of Labor and Employment (the “Department”) made in the course of an
investigation that the Department undertakes or is undertaking pursuant to the authority
established in Subsection 8-17.5-102 (5), C.R.S.
f. If Service Provider violates any provision of this Agreement pertaining to the
duties imposed by Subsection 8-17.5-102, C.R.S. the City may terminate this Agreement. If this
Agreement is so terminated, Service Provider shall be liable for actual and consequential
damages to the City arising out of Service Provider’s violation of Subsection 8-17.5-102, C.R.S.
g. The City will notify the Office of the Secretary of State if Service Provider
violates this provision of this Agreement and the City terminates the Agreement for such breach.
21. Special Provisions. [Optional] Special provisions or conditions relating to the
services to be performed pursuant to this Agreement are set forth in Exhibit " ", consisting
of ( ) pages, attached hereto and incorporated herein by this reference.
CITY OF FORT COLLINS, COLORADO
a municipal corporation
By:_______________________________
Gerry S. Paul
Director of Purchasing and Risk Management
Date:_____________________________
ATTEST:
_________________________________
City Clerk
APPROVED AS TO FORM:
________________________________
Assistant City Attorney
By:_______________________________
__________________________________
PRINT NAME
__________________________________
CORPORATE PRESIDENT OR VICE PRESIDENT
Date:_____________________________
ATTEST: (Corporate Seal)
_____________________________
CORPORATE SECRETARY
EXHIBIT
INSURANCE REQUIREMENTS
1. The Service Provider will provide, from insurance companies acceptable to the City, the
insurance coverage designated hereinafter and pay all costs. Before commencing work
under this bid, the Service Provider shall furnish the City with certificates of insurance
showing the type, amount, class of operations covered, effective dates and date of
expiration of policies, and containing substantially the following statement:
"The insurance evidenced by this Certificate will not be cancelled or materially
altered, except after ten (10) days written notice has been received by the City of Fort
Collins."
In case of the breach of any provision of the Insurance Requirements, the City, at its
option, may take out and maintain, at the expense of the Service Provider, such
insurance as the City may deem proper and may deduct the cost of such insurance from
any monies which may be due or become due the Service Provider under this
Agreement. The City, its officers, agents and employees shall be named as additional
insureds on the Service Provider's general liability and automobile liability insurance
policies for any claims arising out of work performed under this Agreement.
2. Insurance coverages shall be as follows:
A. Workers' Compensation & Employer's Liability. The Service Provider shall
maintain during the life of this Agreement for all of the Service Provider's
employees engaged in work performed under this agreement:
1. Workers' Compensation insurance with statutory limits as required by
Colorado law.
2. Employer's Liability insurance with limits of $100,000 per accident,
$500,000 disease aggregate, and $100,000 disease each employee.
B. Commercial General & Vehicle Liability. The Service Provider shall maintain
during the life of this Agreement such commercial general liability and automobile
liability insurance as will provide coverage for damage claims of personal injury,
including accidental death, as well as for claims for property damage, which may
arise directly or indirectly from the performance of work under this Agreement.
Coverage for property damage shall be on a "broad form" basis. The amount of
insurance for each coverage, Commercial General and Vehicle, shall not be less
than $500,000 combined single limits for bodily injury and property damage.
In the event any work is performed by a subcontractor, the Service Provider shall
be responsible for any liability directly or indirectly arising out of the work
performed under this Agreement by a subcontractor, which liability is not covered
by the subcontractor's insurance.
SITE CLEARING SECTION 02230
SECTION 02230 – SITE CLEARING
PART 1 – GENERAL
1.01 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 1 Specification Sections, apply to this Section.
1.02 SUMMARY
A. This Section includes the following:
1. Protecting existing trees to remain.
2. Removing existing trees and shrubs.
3. Clearing and grubbing.
4. Removing above- and below-grade site improvements.
5. Disconnecting, capping or sealing, and abandoning site utilities in place.
6. Temporary erosion and sedimentation control measures.
B. Related Sections include the following:
1. Division 2 Section "Tree Protection and Trimming" for protecting trees remaining on-site
that are affected by site operations.
2. Division 2 Section "Lawns and Grasses” for finish grading including preparing and
placing planting soil mixes and testing of topsoil material.
1.03 DEFINITIONS
A. Topsoil defined below is raw material that may need screening and amending before meeting
planting soil mix requirements.
C. Tree Protection Zone: Area surrounding individual trees or groups of trees to be protected
during construction, and defined by the drip line of individual trees or the perimeter drip line of
groups of trees, unless otherwise indicated.
1.04 MATERIAL OWNERSHIP
A. Except for stripped topsoil or other materials indicated to remain Owner's property, cleared
materials shall become Contractor's property and shall be removed from Project site.
SITE CLEARING SECTION 02230
1.05 SUBMITTALS
A. Photographs or videotape, sufficiently detailed, of existing conditions of trees and plantings,
adjoining construction, and site improvements that might be misconstrued as damage caused by
site clearing.
B. Record drawings, according to Division 1 Section "Project Record Documents," identifying and
accurately locating capped utilities and other subsurface structural, electrical, and mechanical
conditions.
1.06 QUALITY ASSURANCE
A. Pre-installation Conference: Conduct conference at Project site to comply with requirements in
Division 1 Section "Project Management and Coordination."
1.07 PROJECT CONDITIONS
A. Traffic: Minimize interference with adjoining roads, streets, walks, and other adjacent
occupied or used facilities during site-clearing operations.
1. Do not close or obstruct streets, walks, or other adjacent occupied or used facilities
without permission from Owner and authorities having jurisdiction.
2. Provide alternate routes around closed or obstructed traffic ways if required by
authorities having jurisdiction.
B. Improvements on Adjoining Property: Authority for performing site clearing indicated on
property adjoining Owner's property will be obtained by Owner before award of Contract.
1. Do not proceed with work on adjoining property until directed by Owner’s
Representative.
C. Salvable Improvements: Carefully remove items indicated to be salvaged and store on Owner's
premises where indicated.
D. Utility Locator Service: Notify utility locator service for area where Project is located before
site clearing.
E. Do not commence site clearing operations until temporary erosion and sedimentation control
measures are in place.
PART 2 – PRODUCTS - Not Applicable
PART 3 - EXECUTION
3.01 PREPARATION
A. Protect and maintain benchmarks and survey control points from disturbance during
construction.
SITE CLEARING SECTION 02230
B. Locate and clearly flag trees and vegetation to remain or to be relocated.
C. Protect existing site improvements to remain from damage during construction.
1. Restore damaged improvements to their original condition, as acceptable to Owner.
3.02 TEMPORARY EROSION AND SEDIMENTATION CONTROL
A. Provide temporary erosion and sedimentation control measures to prevent soil erosion and
discharge of soil-bearing water runoff or airborne dust to adjacent properties and walkways,
according to requirements of authorities having jurisdiction.
B. Inspect, repair, and maintain erosion and sedimentation control measures during construction
until permanent vegetation has been established.
C. Remove erosion and sedimentation controls and restore and stabilize areas disturbed during
removal.
3.03 TREE PROTECTION
A. Erect and maintain temporary fencing around tree protection zones before starting site clearing.
Remove fence when construction is complete.
1. Do not store construction materials, debris, or excavated material within fenced area.
2. Do not permit vehicles, equipment, or foot traffic within fenced area.
3. Maintain fenced area free of weeds and trash.
B. Do not excavate within tree protection zones, unless otherwise indicated.
C. Where excavation for new construction is required within tree protection zones, hand clear and
excavate to minimize damage to root systems. Use narrow-tine spading forks, comb soil to
expose roots, and cleanly cut roots as close to excavation as possible.
1. Cover exposed roots with burlap and water regularly.
2. Temporarily support and protect roots from damage until they are permanently redirected
and covered with soil.
3. Coat cut faces of roots more than 1-1/2 inches in diameter with an emulsified asphalt or
other approved coating formulated for use on damaged plant tissues.
4. Backfill with soil as soon as possible.
D. Repair or replace trees and vegetation indicated to remain that are damaged by construction
operations, in a manner approved by Owner’s Representative.
1. Employ an arborist, licensed in jurisdiction where Project is located, to submit details of
proposed repairs and to repair damage to trees and shrubs.
2. Replace trees that cannot be repaired and restored to full-growth status, as determined by
Owner’s Representative.
SITE CLEARING SECTION 02230
3.04 UTILITIES
A. Owner will arrange for disconnecting and sealing indicated utilities that serve existing
structures before site clearing, when requested by Contractor.
1. Verify that utilities have been disconnected and capped before proceeding with site
clearing.
B. Locate, identify, disconnect, and seal or cap off utilities indicated to be removed.
1. Arrange with utility companies to shut off indicated utilities.
2. Owner will arrange to shut off indicated utilities when requested by Contractor.
C. Existing Utilities: Do not interrupt utilities serving facilities occupied by Owner or others
unless permitted under the following conditions and then only after arranging to provide
temporary utility services according to requirements indicated:
1. Notify Owner’s Representative not less than 2 days in advance of proposed utility
interruptions.
2. Do not proceed with utility interruptions without Owner’s Representative written
permission.
D. Excavate for and remove underground utilities indicated to be removed.
3.05 CLEARING AND GRUBBING
A. Remove obstructions, trees, shrubs, grass, and other vegetation to permit installation of new
construction.
1. Do not remove trees, shrubs, and other vegetation indicated to remain or to be relocated.
2. Cut minor roots and branches of trees indicated to remain in a clean and careful manner
where such roots and branches obstruct installation of new construction.
3. Grind stumps and remove roots, obstructions, and debris extending to a depth of 18
inches below exposed sub-grade.
4. Use only hand methods for grubbing within tree protection zone.
5. Chip removed tree branches and of off-site.
B. Fill depressions caused by clearing and grubbing operations with satisfactory soil material
unless further excavation or earthwork is indicated.
1. Place fill material in horizontal layers not exceeding a loose depth of 8 inches, and
compact each layer to a density equal to adjacent original ground.
C. Excavate adjacent to existing sidewalks to a depth of 3” to allow for mulch installation.
SITE CLEARING SECTION 02230
3.06 SITE IMPROVEMENTS
A. Remove existing above- and below-grade improvements as indicated and as necessary to
facilitate new construction.
B. Remove slabs, paving, curbs, gutters, and aggregate base as indicated.
1. Unless existing full-depth joints coincide with line of demolition, neatly saw-cut length
of existing pavement to remain before removing existing pavement. Saw-cut faces
vertically.
2. Paint cut ends of steel reinforcement in concrete to remain to prevent corrosion.
3.07 DISPOSAL
A. Disposal: Remove surplus soil material, unsuitable topsoil, obstructions, demolished materials,
and waste materials including trash and debris, and legally dispose of them off Owner's
property.
1. Separate recyclable materials produced during site clearing from other non-recyclable
materials. Store or stockpile without intermixing with other materials and transport them
to recycling facilities.
END OF SECTION
TREE PROTECTION AND TRIMMING 02231 - 1
SECTION 02231 - TREE PROTECTION
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 1 Specification Sections, apply to this Section.
1.2 SUMMARY
A. This Section includes the protection of existing trees that are affected by, execution of the
Work, whether temporary or permanent construction.
1.3 DEFINITIONS
A. Tree Protection Zone: Area surrounding individual trees or groups of trees to remain during
construction, and defined by the drip line or 15 feet from the trunk (whichever is greater) of
individual trees or the perimeter drip line or 15 feet from the trunks of the outermost trees in the
group (whichever is greater), unless otherwise indicated. Tree Protection Zones shall be fenced
as outlined below.
1.4 SUBMITTALS
A. Product Data: For each type of product indicated.
1.5 QUALITY ASSURANCE
A. Pre-installation Conference: Conduct conference at Project site to comply with requirements in
Division 1 Section "Project Management and Coordination."
1. Before tree protection begins, meet with representatives of authorities having jurisdiction,
Owner, Landscape Architect, consultants, and other concerned entities to review tree
protection procedures and responsibilities.
PART 2 - PRODUCTS
2.1 MATERIALS
A. Drainage Fill: Selected crushed stone, or crushed or uncrushed gravel, washed, ASTM D 448,
Size 24, with 90 to 100 percent passing a 2-1/2-inch (63-mm) sieve and not more than 10
percent passing a 3/4-inch (19-mm) sieve.
TREE PROTECTION AND TRIMMING 02231 - 2
B. Topsoil: Natural or cultivated surface-soil layer containing organic matter and sand, silt, and
clay particles; friable, pervious, and black or a darker shade of brown, gray, or red than
underlying subsoil; reasonably free of subsoil, clay lumps, gravel, and other objects more than 1
inch (25 mm) in diameter; and free of weeds, roots, and toxic and other non-soil materials.
1. Obtain topsoil only from well-drained sites where topsoil is 4 inches (100 mm) deep or
more; do not obtain from bogs or marshes.
C. Fencing material shall be a bright, contrasting color (i.e. orange snow fencing), durable, and at
least 4 feet high. Fence posts shall be comparable to metal T-posts or heavier posts and placed
at least 2 feet below ground.
D. Filter Fabric: Manufacturer's standard, nonwoven, pervious, geotextile fabric of polypropylene,
nylon, or polyester fibers.
E. Organic Mulch: Ground or shredded bark, free of deleterious materials.
PART 3 - EXECUTION
3.1 PREPARATION
A. Tree Fencing
1. Fencing material shall encircle any tree whose outer dripline edge is within 20 feet of any
construction activities.
2. Fencing material shall be placed at the dripline or at least 15 feet from any tree trunk,
whichever distance is greater, and maintained in an upright position throughout the
duration of construction activities.
3. Heavy objects, such as wood pallets or metal railings, shall not lean against or come into
contact with any tree trunk.
4. Do not store construction materials, debris, or excavated material inside tree protection
zones.
5. Do not permit vehicles or foot traffic within tree protection zones; prevent soil
compaction over root systems. Revise fence installation requirements in subparagraph
below if another fence system is specified.
B. Protect tree root systems from damage caused by runoff or spillage of noxious materials while
mixing, placing, or storing construction materials. Protect root systems from ponding, eroding,
or excessive wetting caused by dewatering operations.
3.2 SOIL COMPACTION PREVENTION
A. To prevent soil compaction, designated routes for equipment and foot traffic by work crews
shall be determined prior to commencing construction activities and shall avoid all Tree
Protection Zones.
B. The contractor shall inform all construction crew members on the site of access routes and will
ensure that only these routes are used.
TREE PROTECTION AND TRIMMING 02231 - 3
C. To prevent tree root smothering, no soil stockpiles, supplies, equipment, or any other material
shall be placed or stored within any Tree Protection Zone.
D. Soil around a tree drip line may be required to be aerated during and after construction
activities. This is necessary even when compaction results from heavy foot traffic. A
professional arborist shall do the vertical aeration, soil fracturing or soil air spading.
Conventional turf aeration is not acceptable.
E. When foot traffic or equipment use is unavoidable within the drip line, the area within the drip
line shall be mulched with wood chips to a depth of 6 inches before construction activity
begins. A 6-inch mulch depth shall be maintained for the duration of the project, and then
removed when construction activities are completed.
3.3 EXCAVATION
A. Install shoring or other protective support systems to minimize sloping or benching of
excavations.
B. Do not excavate within tree protection zones, unless otherwise indicated.
C. Retain paragraph below if construction excavation within tree protection zones is unavoidable.
D. Where excavation for new construction is required within tree protection zones, hand clear and
excavate to minimize damage to root systems. Use narrow-tine spading forks and comb soil to
expose roots.
1. Redirect roots in backfill areas where possible. If encountering large main lateral roots,
expose roots beyond excavation limits as required to bend and redirect them without
breaking. If encountered immediately adjacent to location of new construction and
redirection is not practical, Forestry staff shall be notified and appropriate pruning tools
(scissors-type hand pruners and loppers, except anvil-types, and arborist-type pruning
saws).shall be used to make clean cuts to avoid shredding or smashing. Root pruning
cuts should be made back to a lateral root.
2. Do not allow exposed roots to dry out before placing permanent backfill. Provide
temporary earth cover or cover with wet burlap. Water and maintain in a moist
condition. Temporarily support and protect roots from damage until they are
permanently relocated and covered with soil.
E. Where utility trenches are required within tree protection zones, tunnel under or around roots
by drilling, auger boring, pipe jacking, or digging by hand. Root Pruning: Do not cut main
lateral roots or taproots; cut only smaller roots that interfere with installation of utilities. Cut
roots with sharp pruning instruments; do not break or chop.
1. Trenches shall be hand-dug within the dripline in areas where roots 2 inches and larger in
diameter are present, and when low branches which may be damaged by equipment are
present. Whenever possible, roots 2 inches or larger in diameter shall be tunneled or
bored under and shall be covered to prevent dehydration. Exposed roots shall be covered
immediately with soil or burlap and kept moist.
2. When more than one root 2 inches or larger in diameter on any tree is cut, supplemental
watering shall be provided if the tree lacks an operational sprinkler system. Watering
TREE PROTECTION AND TRIMMING 02231 - 4
shall commence immediately after roots have been cut or damaged and continue through
the end of the project at a rate of 15 gallons per inch of trunk diameter (i.e. a tree with
diameter of 10 inches shall be watered at a rate of .150 gallons per week). Watering shall
occur weekly between May 1 and October 31; watering shall occur once/month
November 1 thru April 30.
3. Sidewalk and paving surfaces shall be sufficiently contoured to avoid cutting surface tree
roots. Whenever possible, tree roots should be bridged or floated over with walks. To
allow maximum aeration and water penetration to roots, walk materials other than
concrete may be selected (e.g., brick, flagstone, honeycomb block, chips, gravel) subject
to City approval. Under no circumstances shall impervious material make contact with
or completely encircle a tree trunk.
3.4 REGRADING
A. Within Tree Protection Zones:
1. Grade changes, such as removing topsoil or adding fill material, shall not occur within
the Tree Protection Zone around any existing tree. If necessary as part of project or site
development and if approved by the City, retaining walls and tree wells may be used to
maintain the existing grade within the Tree Protection Zone of any tree when constructed
prior to site grading changes near the tree.
B. Grade Lowering: Where new finish grade is indicated below existing grade around trees, slope
grade away from trees as recommended by arborist, unless otherwise indicated.
1. Root Pruning: Prune tree roots exposed during grade lowering. Do not cut main lateral
roots or taproots; cut only smaller roots. Cut roots with sharp pruning instruments; do not
break or chop.
C. Minor Fill: Where existing grade is 6 inches (150 mm) or less below elevation of finish grade,
fill with topsoil. Place topsoil in a single uncompacted layer and hand grade to required finish
elevations.
D. Moderate Fill: Where existing grade is more than 6 inches (150 mm) but less than 12 inches
(300 mm) below elevation of finish grade, place drainage fill, filter fabric, and topsoil on
existing grade as follows:
3.5 TREE DAMAGE AND MITIGATION
A. All public trees are protected by B.R.C. 6-6-7 Mitigation of Trees or Plants Removed or De-
stroyed. No person shall remove or destroy any tree or plant on public property without first
having a plan approved by the City Forester for the mitigation of the loss of such tree. The re-
moved or destroyed tree shall be mitigated in a manner as determined by the City Forester. The
City’s Project Manager shall notify the City within twenty-four (24) - hours of any suspected
damage to trees resulting from construction activities. If damage occurs during construction,
the contractor shall have the damaged tree evaluated immediately by the City Forestry office.
Mitigation paid to City Forestry shall be required if the damage is severe.
TREE PROTECTION AND TRIMMING 02231 - 5
B. If greater than 40% of the canopy or root system is damaged or removed during construction,
the tree shall be evaluated for safety and future health by a certified arborist. A complete copy
of the evaluation shall be submitted to the City. Further mitigation shall be required if the tree
is unsafe and subsequently removed.
END OF SECTION 02231
EARTHWORK 02301-1
SECTION 02301 – EARTHWORK
PART 1 – GENERAL
1.01 SUMMARY
A. Provide earthwork as shown and as specified. This work shall consist of excavation,
embankment fill, disposal of excess material, shaping, and compaction of all material
encountered within the limits of work, including excavation and backfill for structures. The
excavation shall include, but is not limited to, the native soils which must be excavated for the
project work. All work shall be completed in accordance with these Specifications and the
lines and grades on the Drawings. All excavation will be classified, "unclassified excavation",
or "muck excavation" or "rock excavation", as hereafter described. All embankment will be
classified "embankment material" as hereafter described.
1.02 RELATED SECTIONS
A. Section 02230 – Site Clearing
1.03 DEFINITIONS
A. Unclassified Excavation shall consist of the excavation of all materials on site to final grades,
excluding the bid items included in section 02220. Excavation of unsuitable material will only
be paid for if it is found to be unsuitable in its original state.
B. Muck Excavation shall consist of the removal and disposal of mixtures of soils and organic
matter not suitable for foundation material and replacement with approved material. Material
damaged due to rain or weather will not be paid for as Muck excavation and is entirely the
responsibility of the CONTRACTOR.
C. Rock Excavation shall consist of igneous, metamorphic and sedimentary rock which cannot be
excavated without the use of rippers, and all boulders or other detached stones each having a
volume of 1/2 cubic yard or more, as determined by physical or visual measurement. It shall
also include replacement with approved material as required.
D. Embankment (Complete in Place): shall consist of placing all excavated material, except
material being hauled and disposed, as embankment and compacted to final grades as specified
in the Contract Documents and on the Drawings.
1.04 TESTING
A. Contractor will arrange and owner shall pay for soil sampling and testing. Contractor shall
extend full cooperation to Owner and testing agency in obtaining samples and performing tests.
Where soil materials do not conform to type or density specified, soil shall be replaced or
reworked to conform. The cost of the initial test will be paid by the owner, while all additional
tests for replaced or reworked areas shall be paid for by the Contractor.
EARTHWORK 02301-2
1.06 PROTECTION
A. Protect existing improvements, utilities, trees and shrubs, and reference marks in accordance
with Section 02230.
PART 2 – MATERIALS
2.01 SOIL MATERIALS, GENERAL
A. Soil materials shall be free of organic matter, debris, frozen soils, ice, and other objectionable
materials. Rock particles larger than maximum size specified shall be removed prior to
placement of soil.
B. Select existing material from required excavations may be used for fill or backfill if it meets the
specified material requirements. If necessary, furnish additional approved material from
suitable off-site sources.
C. Muck excavation shall also include the replacement of excavated muck with uniformly graded
rock, riprap, on-site or imported soils, or other material whichever is most suitable for the
specific situation encountered. The Architect will determine which type of aggregate or other
material which shall be used after observing the specific site conditions.
2.02 GRANULAR FILL, BEDDING, AND BACKFILL
A. Select soils complying with ASTM D2487 soil classification groups GW (well-graded gravel),
GP (poorly-graded gravel), SW (well-graded sand), or SP (poorly-graded sand). Aggregate
shall pass a 3/4-inch sieve and not more than 35% shall be retained on a No. 10 sieve.
Maximum 5% by weight shall pass a No. 200 sieve.
2.03 FILL AND BACKFILL
A. Previously excavated soils, free of aggregate larger than 3 inches, and suitable for intended
purpose
PART 3 – EXECUTION
3.01 PREPARATION
A. Prepare site for work in accordance with Section 02230. Layout and stake work to be
performed.
3.02 GENERAL EXCAVATION
A. The excavation and embankment for the project work shall be finished to reasonably smooth
and uniform surfaces. Variation from the subgrade plane shall not be more than .08 feet in soil
or more than .08 feet above or .50 below in rock. Where bituminous or concrete surfacing
materials are to be placed directly on the subgrade, the subgrade plane shall not vary more than
0.04 feet. Materials shall not be wasted without permission of the Owner’s Representative.
Excavation operations shall be conducted so that material outside of the limits of slopes will not
EARTHWORK 02301-3
be disturbed. Prior to beginning grading operations in any area, all necessary clearing and
grubbing in that area shall have been performed in accordance with Section 02110 of these
Specifications.
When the CONTRACTOR’s excavating operations encounter remains of pre-historic people’s
dwelling sites or artifacts of historical or archaeological significance, the operations, shall be
temporarily discontinued. The Owner’s Representative will contact archaeological authorities
to determine the disposition thereof. When directed, the CONTRACTOR shall excavate the
site in such a manner as to preserve the artifacts encountered and shall remove them for
delivery to the custody of the proper state authorities. Such excavation will be considered and
paid for as extra work.
B. For footings and foundations, take care not to disturb bottom of excavation. Excavate to final
grade just before concrete is placed. Trim bottoms to required lines and grades to leave solid,
undisturbed base to receive granular fill, base course, or concrete as shown.
3.03 EXCAVATION FOR EMBANKMENTS
A. Unclassified: All excess suitable material excavated from the project site and not used for
embankment shall be removed from the project site and become the property of the
CONTRACTOR. Where material encountered within the limit of the work is considered
unsuitable for embankment (fills) on any portion of this project work, such material shall be
excavated as directed by the Owner’s Representative and replaced with suitable fill material.
All unsuitable excavated material from excavation consisting of any type of debris (surface or
buried), excavated rock, bedrock or rocks larger than 6 inches in diameter and boulders shall be
hauled from the project site and disposed of. Debris is defined as "anything that is not earth
which exists at the job site".
B. Muck: Where excavation to the finished grade section results in a subgrade or slopes of
unsuitable soil, the Owner’s Representative may require the CONTRACTOR to remove the
unsuitable materials and backfill to the finished graded section with approved material.
Disposal of the material shall be at the CONTRACTOR’s expense.
C. Good surface drainage shall be provided around all permanent cuts to direct surface runoff
away from the cut face.
D. Rock: Unless otherwise specified, rock shall be excavated to a minimum depth of 0.5 feet
below subgrade within the limits of the channel area, and the excavation shall be backfilled
with material shown on the Drawings or as designated by the Owner’s Representative. Disposal
of material and replacement with suitable approved material shall be at the CONTRACTOR’s
expense.
3.04 EMBANKMENT CONSTRUCTION
A. Embankment construction shall consist of constructing all fill areas, including preparation of
the areas upon which they are to be placed, and the placing and compacting of embankment
material in holes, pits and other depressions within the project area. Only approved materials
shall be used in the construction of embankments and backfills.
EARTHWORK 02301-4
B. Approved materials shall consist of clean on-site cohesive soils or approved imported soils.
On-site cohesive soils are suitable for use as compacted fill provided the following
recommendations are met:
1. Excavation and Embankment will only be paid when a significant change in grade is
required, as determined by the Owner’s Representative. Minor cuts and fills will be
considered incidental to the work, and will not be paid for separately under this section.
Percent Finer by Weight
Gradation (ASTM C136)
1/2-Inch 100
3/8-Inch 70 – 100
No. 4 Sieve 50 – 100
No. 200 Sieve 60 (min
Liquid Limit
Plasticity Index
In-Situ Coefficient of Permeability
30 (min)
15 (min)
1x10-6cm/sec (max)
3. On-site cohesive soils or imported soils should be placed and compacted in thin,
horizontal lifts, not to exceed 8 inches in thickness (measured prior to compaction),
using equipment and procedures that will produce recommended moisture contents and
densities throughout the lift and embankment height. On-site or imported cohesive
soils should be compacted within a moisture content range of optimum to 3% above
optimum moisture content and compacted to 95% of the Maximum Standard Proctor
Density (ASTM D698).
4. When embankment is to be placed and compacted on hillsides, or when new
embankment is to be compacted against existing embankments, or when embankment
is built 1/2 width at a time, the slopes that are steeper than 4:1 when measured
longitudinally or at right angles to the adjacent ground shall be continuously benched
over those areas where it is required as the work is brought up in layers. Benching shall
be well keyed and where practical a minimum of 8 feet. Each horizontal cut shall begin
at the intersection of the original ground and the vertical sides of the previous cuts.
Material thus cut out shall be recompacted along with the new embankment material at
the CONTRACTOR’s expense.
5. The ground surface underlying all fills shall be carefully prepared by removing all
organic matter, scarification to a depth of 8 inches and recompacting to 95% of the
Maximum Standard Proctor Density (ASTM D698) at optimum moisture content + or -
2% prior to fill placement.
EARTHWORK 02301-5
6. Embankment material shall be placed in horizontal layers not exceeding 8 inches (loose
measurement) and shall be compacted to 95% of the Maximum Standard Proctor
Density (ASTM D698) at optimum moisture content + or - 2%. Effective spreading
equipment shall be used on each lift to obtain uniform thickness prior to compacting.
As the compaction of each layer progresses, continuous leveling and manipulating will
be required to assure uniform density.
7. A moisture density determination shall be made for each soil type encountered. Unless
directed by the geotechnical engineer, the standard Proctor maximum dry density
(ASTM D 698) shall apply.
8. For embankments which serve as berms, the downstream portion shall be "keyed" into
the subsurface soils a minimum of 3 feet to enhance the stability of the slope.
9. Materials which are removed from excavations beneath the water table may be over the
acceptable moisture content range and will require that they be dried out prior to
reusing them.
10. Cross hauling or other action as appropriate will be ordered when necessary to insure
that the best available material is placed in critical areas of embankments, including the
top 2 feet of all embankments. No additional payment will be made for cross hauling
ordered by the Owner’s Representative.
11. Frozen materials shall not be used in construction of embankments and embankments
shall not be constructed on frozen materials.
12. During the construction of the channels, the channel bottom shall be maintained in such
condition that it will be well drained at all times.
13. Excavation or Embankment (Fill), and Structural Backfill work either completed or in a
stage of completion that is either eroded or washed away or becomes unstable due to
either rains, snow, snow melt, channel flows or lack of proper water control shall be
either removed and replaced, recompacted or reshaped as directed by the Owner’s
Representative and in accordance with the Drawings and Specifications at the
CONTRACTOR’s sole expense. Removed unsuitable materials shall be hauled away
and disposed of at the CONTRACTOR’s expense. Placing of replacement materials
for removed unsuitable materials shall be purchased, placed and compacted at the
CONTRACTOR’ expense.
C. Proofrolling with a heavy rubber tired roller will be required, if designated on the Drawings or
when ordered by the Owner’s Representative. Proof rolling shall be done after specified
compaction has been obtained. Areas found to be weak and those areas which failed shall be
ripped, scarified, wetted if necessary, and recompacted to the requirements for density and
moisture at the CONTRACTOR’s expense.
D. Proof rolling shall be done with equipment and in a manner acceptable to the Owner’s
Representative. Proof rolling as shown on the Drawings or as ordered by the Owner’s
Representative shall not be measured and paid for separately, but shall be included in the unit
prices bid for the work.
EARTHWORK 02301-6
3.05 TRENCHING
A. Prepare Excavate trenches so that pipe can be laid safely and accurately to required line
and grade. Hand excavate for bells, fittings and projections to allow for proper jointing
and to insure that pipe rests evenly along barrel and is not resting on bell.
B. In sand and gravel soils, bottom of trench may be shaped to fit bottom 1/3 of pipe. In silt
or clay soils, bottom of trench shall be 4 in. below pipe barrel and 3 in. below bell.
Under foundations and footings, bottom of trench shall be 8 in. below pipe. Bedding
will be uniformly graded material conforming to CDOT #67 granular bedding unless
otherwise noted on the Drawings or as approved by the Engineer.
3.06 UNAUTHORIZED EXCAVATION
A. Unauthorized excavation consists of removal of materials beyond indicated elevations or
side dimensions without specific direction of Architect. Unauthorized excavation, as
well as remedial work, shall be at Contractor's expense. Notify Owner if unauthorized
excavations are made.
B. Backfill and compact unauthorized excavations as specified for authorized excavations
of same classification, unless otherwise directed.
3.07 STABILITY OF EXCAVATIONS
A. Maintain sides and slopes of excavations in a safe condition until completion of
backfilling. Slope sides of excavations to angle of repose of material excavated;
otherwise, shore and brace where sloping is not possible either because of space
restrictions or stability of material excavated. Comply with applicable codes and
ordinances.
3.08 DEWATERING
A. Perform earthwork in a manner to prevent surface water and ground water from flowing
into excavations. Promptly remove water from excavations using pumps, sumps, and
dewatering system components necessary to convey water away from excavations. If
underground springs are encountered, notify Owner before proceeding.
3.09 STOCKPILING
A. Stockpile excavated materials meeting the requirements for fill and backfill where
directed until required for the work. Place, grade, and shape stockpiles for proper
drainage. Locate stockpiles a sufficient distance from edge of excavations to prevent
such material from falling or sliding into excavations and to prevent cave-ins.
3.10 COLD WEATHER PROTECTION
A. Protect excavation bottoms against freezing when atmospheric temperature is less than
35F by covering with dry insulating materials of sufficient depth to prevent frost
penetration.
EARTHWORK 02301-7
3.11 GRADING
A. Grade area within project limits by cutting and/or filling as necessary to achieve lines
and grades shown. Grade areas adjacent to structure lines to drain away from structure
to prevent ponding. Finish surface to be reasonably smooth and free from irregular
surface changes. Tolerance for areas to receive topsoil shall be 0.3 ft above or below
established grade, less allowance for topsoil. Tolerance for areas to be paved shall be 0.1
ft above or below established pavement subgrade. Tolerance for turf areas shall be 0.025
as per Owner.
3.12 DISPOSAL OF EXCESS AND WASTE MATERIALS
A. Remove excess excavated material, trash, debris, and other waste materials and legally
dispose of them off-site.
3.13 FIELD QUALITY CONTROL
A. Moisture and density tests are required and are the responsibility of the Contractor and
shall be performed by a private Geotechnical Consultant. Contractor is responsible for
all coordination of testing. Owner will pay for first test while additional testing shall be
paid for by contractor. The following minimum tests should be expected to be
performed.
1. Embankment subgrade – 1 per 500 lineal feet.
2. Embankment fill – 1 per 500 lineal feet of embankment alternating leftand right of
centerline or as directed by the geotechnical engineer or Owner’s Representative.
3. Compaction tests, as specified above, shall be performed for each vertical foot of
compacted embankment.
B. Field tests will be conducted to determine compliance of moisture/density testing
methods with specified density in accordance with ASTM D2922.
C. Test results shall be submitted to the Engineer by the Contractor or the Geotechnical
Consultant for approval by the Owner prior to acceptance of the pipeline and shall be
made available on the day of the test.
D. Failed test areas shall be recompacted and retested at Contractor’s expense.
E. Compacted material shall be within 2% (+/-) of the optimum moisture content of the soil
as determined by ASTM D698. Water shall be added to the material, or the material
shall be harrowed, disced, bladed, or otherwise worked to ensure a uniform moisture
content as specified.
F. Sect Final topography and/or cross-sections will be surveyed of areas that are to finished
grade and compared to the design section for accuracy. Final grade shall match design
grades within the tolerances discussed in PART 3 EXECUTION.
PART 4 – SCHEDULES
EARTHWORK 02301-8
4.01 COMPACTION SCHEDULE (unless otherwise stated on the drawings or specifications)
Location
Lift
Thickness(1)
Compaction(2)
Below foundations, slabs, pavements, walks, and
other designated areas
6" 95%
Unpaved areas 8 feet or less outside structure line 8" 95%
Unpaved areas more than 8 feet outside structure
line
12" 90%
(1)Place manually compacted materials in maximum 4-inch layers.
(2) Percent of maximum density determined in accordance with ASTM D1557 (Modified
Proctor test).
END OF SECTION
IRRIGATION SPECIFICATIONS – PORTNER SUBSTATION
SECTION 02810 - IRRIGATION
PART 1: GENERAL
1.1 SCOPE
Furnish all labor, materials, supplies, equipment, tools and transportation, and perform
all operations in connection with and reasonably incidental to the complete installation of
the renovated irrigation system as shown on plans, and guarantee/warranty as shown on
the drawings, the installation details, and as specified herein. Items of work specifically
included are:
A. Procurement of all applicable licenses, permits, and fees.
B. Coordination of Utility Locates (“Call Before You Dig”).
C. Verification of existing static pressure.
D. Maintenance period.
E. Sleeving for irrigation pipe and wire.
1.2 WORK NOT INCLUDED
Items of work specifically excluded or covered under other sections are:
A. Payment of all development, plant investment, or any other fees and permits
associated with the purchase and installation of the tap.
B. Excavation, installation, and backfill of tap into municipal water line.
C. Excavation, installation, and backfill of water meter and vault.
D. Provision and connection of electrical power supply to the irrigation control system.
E. Installation of pumping plant for irrigation system.
1.3 SUBMITTALS
A. Deliver four (4) copies of all required submittals to the Owners’ Representative within
15 days from the date of Notice to Proceed.
B. Materials List: Include pipe, fittings, mainline components, water emission
components, control system components. Quantities of materials need not be
included.
C. Manufacturers' Data: Submit manufacturers' catalog cuts, specifications, and
IRRIGATION SPECIFICATIONS Effective Date Section - 02810
PORTNER SUBSTATION 11/9/2012 Page - 2
operating instructions for equipment shown on the materials list.
D. Shop Drawings: Submit shop drawings called for in the installation details. Show
products required for proper installation, their relative locations, and critical
dimensions. Note modifications to the installation detail.
E. Project Record Drawings: Submit project record (as-built) drawings to Owner prior
to commencement of maintenance period (refer to specification section 3.12 for
specific requirements).
1.4 RULES AND REGULATIONS
A. Work and materials shall be in accordance with the latest edition of the National
Electric Code, the Uniform Plumbing Code as published by the Western Plumbing
Officials Association, and applicable laws and regulations of the governing
authorities.
B. When the contract documents call for materials or construction of a better quality or
larger size than required by the above-mentioned rules and regulations, provide the
quality and size required by the contract documents.
C. If quantities are provided either in these specifications or on the drawings, these
quantities are provided for information only. It is the Contractor's responsibility to
determine the actual quantities of all material, equipment, and supplies required by
the project and to complete an independent estimate of quantities and wastage.
1.5 TESTING
A. Notify the Owners’ Representative three days in advance of testing.
B. Pipelines jointed with rubber gaskets or threaded connections may be subjected to a
pressure test at any time after partial completion of backfill. Pipelines jointed with
solvent-welded PVC joints shall be allowed to cure at least 24 hours before testing.
C. Subsections of mainline pipe may be tested independently, subject to the review of
the Owners’ Representative.
D. Furnish clean, clear water, pumps, labor, fittings, and equipment necessary to
conduct tests or retests.
E. Hydrostatic Pressure Test:
1) Subject mainline pipe to a hydrostatic pressure equal to the anticipated
operating pressure of 120 PSI for two hours. Test with mainline components
installed. A 2 PSI pressure variation is allowed.
2) Backfill to prevent pipe from moving under pressure. Expose couplings and
fittings.
3) Leakage will be detected by visual inspection. Replace defective pipe, fitting,
joint, valve, or appurtenance. Repeat the test until the pipe passes test.
IRRIGATION SPECIFICATIONS Effective Date Section - 02810
PORTNER SUBSTATION 11/9/2012 Page - 3
a. Cement or caulking to seal leaks is prohibited.
F. Operational Test:
1) Activate each remote control valve in sequence from controller. The Owners’
Representative will visually observe operation, water application patterns, and
leakage.
2) Replace defective remote control valve, solenoid, wiring, or appurtenance to
correct operational deficiencies.
3) Replace, adjust, or move water emission devices to correct operational or
coverage deficiencies.
4) Replace defective pipe, fitting, joint, valve, sprinkler, or appurtenance to correct
leakage problems. Cement or caulking to seal leaks is prohibited.
5) Repeat test(s) until each lateral passes all tests.
G. Signal Wire:
1) Test for leaks to ground per manufacturer's recommendations. Test results
must meet or exceed manufacturer's guidelines for acceptance.
2) Replace defective wire, underground splices, or appurtenances. Repeat the
test until the manufacturer's guidelines are met.
1.6 CONSTRUCTION REVIEW
The purpose of on-site reviews by the Owners’ Representative is to periodically observe
the work in progress and the Contractor's interpretation of the construction documents
and to address questions with regards to the installation.
A. Scheduled reviews such as those for irrigation system layout or testing should be
scheduled with the Owners’ Representative as required by these specifications.
B. Impromptu reviews may occur at any time during the project.
C. Final review will occur at the completion of the irrigation system installation and
Record (As-Built) Drawing submittal.
1.7 GURANTEE/ WARRANTY AND REPLACEMENT
The purpose of this guarantee/warranty is to insure that the Owner receives irrigation
materials of prime quality, installed and maintained in a thorough and careful manner.
A. For a period of one year from commencement of the formal maintenance period,
guarantee/warranty irrigation materials, equipment, and workmanship against
defects. Fill and repair depressions. Restore landscape or structural features
IRRIGATION SPECIFICATIONS Effective Date Section - 02810
PORTNER SUBSTATION 11/9/2012 Page - 4
damaged by the settlement of irrigation trenches or excavations. Repair damage to
the premises caused by a defective item. Make repairs within seven days of
notification from the Owners’ Representative.
B. Contract documents govern replacements identically as with new work. Make
replacements at no additional cost to the contract price.
C. Guarantee/warranty applies to originally installed materials and equipment and
replacements made during the guarantee/warranty period.
PART 2: MATERIALS
2.1 QUALITY
Use materials which are new and without flaws or defects of any type, and which are the
best of their class and kind.
2.2 SUBSTITUTIONS
Pipe sizes referenced in the construction documents are minimum sizes, and may be
increased at the option of the Contractor.
2.3 SLEEVING
A. Install separate sleeve beneath paved areas to route each run of irrigation pipe or
wiring bundle.
B. Sleeving material beneath pedestrian pavements shall be PVC Class 200 pipe with
solvent welded joints.
C. Sleeving beneath drives and streets shall be PVC Class 200 pipe with solvent
welded joints.
D. Sleeving diameter: as indicated on the drawings and installation details or equal to
twice that of the pipe or wiring bundle.
2.4 PIPE AND FITTINGS
A. Mainline Pipe and Fittings:
1) Use rigid, unplasticized polyvinyl chloride (PVC) 1120, 1220 National Sanitation
Foundation (NSF) approved pipe, extruded from material meeting the
requirements of Cell Classification 12454-A or 12454-B, ASTM Standard
D1784, with an integral belled end.
2) Use Class 200, SDR-21, rated at 200 PSI, conforming to the dimensions and
tolerances established by ASTM Standard D2241. Use PVC pipe rated at
higher pressures than Class 200 in the case of small nominal diameters which
are not manufactured in Class 200.
IRRIGATION SPECIFICATIONS Effective Date Section - 02810
PORTNER SUBSTATION 11/9/2012 Page - 5
a. Use solvent weld pipe for mainline pipe with a nominal diameter less than
3-inches or where a pipe connection occurs in a sleeve. Use Schedule 40,
Type 1, PVC solvent weld fittings conforming to ASTM Standards D2466
and D1784. Use primer approved by the pipe manufacturer. Solvent
cement to conform to ASTM Standard D2564.
B. Lateral Pipe and Fittings:
1) Use rigid, unplasticized polyvinyl chloride (PVC) 1120, 1220 National Sanitation
Foundation (NSF) approved pipe, extruded from material meeting the
requirements of Cell Classification 12454-A or 12454-B, ASTM Standard
D1784, with an integral belled end suitable for solvent welding.
2) Use class 200, SDR-21, rated at 200 PSI, conforming to the dimensions and
tolerances established by ASTM Standard D2241. Use PVC pipe rated at
higher pressures than Class 200 in the case of small nominal diameters which
are not manufactured in Class 200.
Use UV radiation resistant Schedule 40, Type 1, PVC solvent weld fittings
conforming to ASTM Standards D2466 and D1784 for PVC pipe.
3) Use primer approved by the pipe manufacturer. Solvent cement to conform to
ASTM Standard D2564, of a type approved by the pipe manufacturer.
C. Specialized Pipe and Fittings:
1) Assemblies calling for pre-fabricated double swing joints shall utilize LASCO
Unitized swing joints or approved equal. Swing joints shall be rated at 315 psi,
and use O-ring and street elbow construction.
2) Low Density Polyethylene Hose:
a. Use pipe specifically intended for use as a flexible swing joint.
Inside diameter: 0.490+0.010 inch.
Wall thickness: 0.100+0.010 inch.
Color: Black.
b. Use spiral barb fittings supplied by the same manufacturer as the hose.
3) Assemblies calling for threaded pipe connections shall utilize PVC Schedule 80
nipples and PVC Schedule 40 or 80 threaded fittings.
4) Joint sealant:
Use only Teflon-type tape pipe joint sealant on plastic threads. Use
nonhardening, nontoxic pipe joint sealant formulated for use on water-carrying
pipes on metal threaded connections.
IRRIGATION SPECIFICATIONS Effective Date Section - 02810
PORTNER SUBSTATION 11/9/2012 Page - 6
D. Marking Tape:
1) Mainline Pipe - Christy underground I.D. tape.
2.5 MAINLINE COMPONENTS
A. Quick Coupling Valve Assembly: Double swing joint arrangement as presented in
the installation details.
2.6 SPRINKLER AND BUBBLER IRRIGATION COMPONENTS
A. Remote Control Valve (RCV) Assembly for Sprinkler Laterals:
As presented in the installation details. Use wire connectors and waterproofing
sealant to join control wires to solenoid valves. Install a separate valve box over a
3-inch depth of 3/4-inch gravel for each assembly. Adjust flow control per
manufacturer’s recommendations prior to use.
B. Sprinkler Assembly: As presented in the drawings and installation details. Use the
sprinkler manufacturer's pressure compensating screens (Rain Bird PCS) to achieve
30 PSI operating conditions on each sprinkler and to control excessive operating
pressures.
2.7 CONTROL SYSTEM COMPONENTS
A. Control Wire:
1) Use American Wire Gauge (AWG) No. 14 solid copper, Type UF or PE cable,
UL approved for direct underground burial from the controller unit to each
remote control valve. Use AWG No. 12 wire for common wire.
2) Color: Use white for common ground wire. Use easily distinguished colors for
other control wires. Spare control wires shall be of a color different from that of
the active control wire. Wire color shall be continuous over its entire length.
3) Splices: Use wire connector with waterproof sealant. Wire connector to be of
plastic construction consisting of two (2) pieces, one piece which snap locks
into the other. A copper crimp sleeve to be provided with connector.
4) Encase wiring not located near PVC irrigation pipe in PVC Schedule 40
electrical conduit.
Warning tape: Inert plastic film highly resistant to alkalis, acids, or other
destructive chemical components likely to be encountered in soils. Three
inches wide, colored yellow, and imprinted with "CAUTION: BURIED
ELECTRIC LINE BELOW."
IRRIGATION SPECIFICATIONS Effective Date Section - 02810
PORTNER SUBSTATION 11/9/2012 Page - 7
B. Existing Control Wire:
1) It is assumed that existing 24 VAC control wire between existing controller and
solenoid valves is in workable condition. Any concerns are to be brought to the
attention of the Owner prior to installation of the replacement controller.
2.8 OTHER COMPONENTS
A. Tools and Spare Parts: Provide operating keys, servicing tools, test equipment,
other items, and spare parts indicated in the General Notes of the drawings.
PART 3: EXECUTION
3.1 INSPECTIONS AND REVIEWS
A. Site Inspections:
1) Verify site conditions and note irregularities affecting work of this section.
Report irregularities to the Owners’ Representative prior to beginning work.
2) Beginning work of this section implies acceptance of existing conditions.
3) Contractor will be held responsible for coordination between landscape and
irrigation system installation.
4) Landscape material locations shown on the Landscape Plan shall take
precedence over the irrigation system equipment locations. If irrigation
equipment is installed in conflict with the landscape material locations shown
on the Landscape Plan, the Contractor will be required to relocate the irrigation
equipment, as necessary, at Contractor’s expense.
B. Utility Locates ("Call Before You Dig"):
1) Arrange for and coordinate with local authorities the location of all underground
utilities.
2) Repair any underground utilities damaged during construction. Make repairs at
no additional cost to the contract price.
C. Irrigation System Layout Review: Irrigation system layout review will occur after the
staking has been completed. Notify the Owners’ Representative two days in
advance of review. Modifications will be identified by the Owners’ Representative at
this review.
3.2 LAYOUT OF WORK
A. Stake out the irrigation system. Items staked include: sprinklers, pipe, and control
valves.
IRRIGATION SPECIFICATIONS Effective Date Section - 02810
PORTNER SUBSTATION 11/9/2012 Page - 8
B. Install all mainline pipe and mainline components inside of project property lines.
3.3 EXCAVATION, TRENCHING, AND BACKFILLING
A. Excavate to permit the pipes to be laid at the intended elevations and to permit work
space for installing connections and fittings.
B. Minimum cover (distance from top of pipe or control wire to finish grade):
1) 24-inch over mainline pipe and over electrical conduit.
2) 26-inch over control wire.
3) 16-inch over lateral pipe to sprinklers and bubblers and over manifold pipe to
drip system zone control valves.
C. Backfill only after lines have been reviewed and tested.
D. Excavated material is generally satisfactory for backfill. Backfill shall be free from
rubbish, vegetable matter, frozen materials, and stones larger than 2-inches in
maximum dimension. Remove material not suitable for backfill. Backfill placed next
to pipe shall be free of sharp objects which may damage the pipe. Stones larger
than 1-inch maximum dimension are not permitted in first (deepest) 6-inches of
backfill.
E. Backfill unsleeved pipe and sleeves in either of the following manners:
1) Backfill and puddle the lower half of the trench. Allow to dry 24 hours. Backfill
the remainder of the trench in 6-inch layers. Compact to density of surrounding
soil.
2) Backfill the trench by depositing the backfill material equally on both sides of
the pipe in 6-inch layers and compacting to the density of surrounding soil.
F. Dress backfilled areas to original grade. Incorporate excess backfill into existing site
grades. Dispose of excess backfill off site.
G. Where utilities conflict with irrigation trenching and pipe work, contact the Owners’
Representative for trench depth adjustments.
3.4 SLEEVING AND BORING
A. Install sleeving at a depth which permits the encased pipe or wiring to remain at the
specified burial depth.
B. Extend sleeve ends six inches beyond the edge of the paved surface. Cover pipe
ends and mark with stakes. Mark concrete with a chiseled "x" at sleeve end
IRRIGATION SPECIFICATIONS Effective Date Section - 02810
PORTNER SUBSTATION 11/9/2012 Page - 9
locations.
C. Bore for sleeves under obstructions which cannot be removed. Employ equipment
and methods designed for horizontal boring.
3.5 ASSEMBLING PIPE AND FITTINGS
A. General:
1) Keep pipe free from dirt and pipe scale. Cut pipe ends square and debur.
Clean pipe ends.
2) Keep ends of assembled pipe capped. Remove caps only when necessary to
continue assembly.
B. Mainline Pipe and Fittings:
1) Use only strap-type friction wrenches for threaded plastic pipe.
2) PVC Solvent Weld Pipe:
a. Use primer and solvent cement. Join pipe in a manner recommended by
the manufacturer and in accordance with accepted industry practices.
b. Cure for 30 minutes before handling and 24 hours before allowing water in
pipe.
c. Snake pipe from side to side within the trench.
3) Fittings: The use of cross type fittings is not permitted.
C. Lateral Pipe and Fittings:
1) Use only strap-type friction wrenches for threaded plastic pipe.
2) PVC Solvent Weld Pipe:
a. Use primer and solvent cement. Join pipe in the manner recommended by
the manufacturer and in accordance with accepted industry practices.
b. Cure for 30 minutes before handling and 24 hours before allowing water in
the pipe.
c. Snake pipe from side to side within the trench.
3) Fittings: The use of cross type fittings is not permitted.
D. Specialized Pipe and Fittings:
1) Pre-fabricated double swing joints: Install per manufacturer's
recommendations.
IRRIGATION SPECIFICATIONS Effective Date Section - 02810
PORTNER SUBSTATION 11/9/2012 Page - 10
2) Low Density Polyethylene Hose: Install per manufacturer's recommendations.
3) PVC Threaded Connections:
a. Use only factory-formed threads. Field-cut threads are not permitted.
b. Use only Teflon-type tape.
c. When connection is plastic-to-metal, the plastic component shall have male
threads and the metal component shall have female threads.
4) Make metal-to-metal, threaded connections with Teflon-type tape or pipe joint
compound applied to the male threads only.
3.6 INSTALLATION OF MAINLINE COMPONENTS
A. Quick Coupling Valve Assembly: Install where indicated on the drawings.
3.7 INSTALLATION OF SPRINKLER AND BUBBLER IRRIGATION COMPONENTS
A. Remote Control Valve (RCV) Assembly for Sprinkler Laterals:
1) Flush mainline before installation of RCV assembly.
2) Install where indicated on the drawings. Wire connectors and waterproof
sealant shall be used to connect control wires to remote control valve wires.
Install connectors and sealant per the manufacturer's recommendations.
3) Install only one RCV to a valve box. Locate valve box at least 12-inches from
and align with nearby walls or edges of paved areas. Group RCV assemblies
together where practical. Arrange grouped valve boxes in rectangular patterns.
Allow at least 12-inches between valve boxes.
4) Adjust RCV to regulate the downstream operating pressure.
5) Attach ID tag with controller station number to control wiring.
B. Sprinkler Assembly:
1) Flush lateral pipe before installing sprinkler assembly.
2) Install per the installation details at locations shown on the drawings.
3) Locate rotary sprinklers 12-inches from adjacent walls, fences, or edges of
paved areas.
4) Locate spray sprinklers 3-inches from adjacent walls, fences, or edges of
paved areas.
IRRIGATION SPECIFICATIONS Effective Date Section - 02810
PORTNER SUBSTATION 11/9/2012 Page - 11
5) Set sprinklers perpendicular to the finish grade.
6) Supply appropriate nozzle or adjust arc of coverage of each sprinkler for best
performance.
7) Adjust the radius of throw of each sprinkler for best performance.
3.8 INSTALLATION OF CONTROL SYSTEM COMPONENTS
A. Control Wire:
1) Bundle control wires where two or more are in the same trench. Bundle with
pipe wrapping tape spaced at 10-foot intervals.
2) Provide a 24-inch excess length of wire in an 8-inch diameter loop at each 90
degree change of direction, at both ends of sleeves, and at 100-foot intervals
along continuous runs of wiring. Make wiring loop by turning control wire 5
turns around 1-inch pipe. Coil 24-inch length of wire within each remote control
valve box.
3) Install common ground wire and one control wire for each remote control valve.
Multiple valves on a single control wire are not permitted.
4) If a control wire must be spliced, make splice with wire connectors and
waterproof sealant, installed per the manufacturer's instructions. Locate splice
in a valve box which contains an irrigation valve assembly, or in a separate 6-
inch round valve box.
Use same procedure for connection to valves as for in-line splices.
5) Unless noted on plans, install wire parallel with and under PVC mainline pipe.
If wire is installed adjacent to section of metal pipe, separate wire from pipe
minimum of 6-inches and install wire in PVC conduit.
6) Encase wire not installed with PVC mainline pipe in electrical conduit.
OR
Protect wire not installed with PVC mainline pipe with a continuous run of
warning tape placed in the backfill six inches above the wiring.
3.9 INSTALLATION OF OTHER COMPONENTS
A. Tools and Spare Parts:
1) Prior to the Pre-Maintenance Review, supply to the Owner operating keys,
servicing tools, test equipment, and any other items indicated on the drawings.
2) Prior to Final Review, supply to the Owner the spare parts indicated in the
General Notes on the drawings.
IRRIGATION SPECIFICATIONS Effective Date Section - 02810
PORTNER SUBSTATION 11/9/2012 Page - 12
B. Other Materials: Install other materials or equipment shown on the drawings or
installation details to be part of the irrigation system, even though such items may
not have been referenced in these specifications.
3.10 PROJECT RECORD DRAWINGS
A. Maintain on-site and separate from documents used for construction, one complete
set of contract documents as Project Documents. Keep documents current. Do not
permanently cover work until as-built information is recorded.
B. Record pipe and wiring network alterations. Record work which is installed
differently than shown on the construction drawings. Record accurate reference
dimensions, measured from at least two permanent reference points, of each
irrigation system valve, each backflow prevention device, each controller or control
unit, each sleeve end, each stub-out for future pipe or wiring connections, and other
irrigation components enclosed within a valve box.
C. Prior to Final Review, purchase from the Owners’ Representative a reproducible
mylar copy of the drawings. Using technical drafting pen, duplicate information
contained on the project drawings maintained on site. Label each sheet "Record
Drawing". Completion of the Record Drawings will be a prerequisite for the Final
Review.
3.11 MAINTENANCE
A. Upon completion of Final Review, maintain irrigation system for a duration of 30
calendar days. Make periodic examinations and adjustments to irrigation system
components so as to achieve the most desirable application of water.
B. Following completion of the Contractor's maintenance period, the Owner will be
responsible for maintaining the system in working order during the remainder of the
guarantee/warranty period, for performing necessary minor maintenance, for
trimming around sprinklers, for protecting against vandalism, and for preventing
damage during the landscape maintenance operation.
3.12 CLEAN-UP
A. Upon completion of work, remove from the site all machinery, tools, excess
materials, and rubbish.
End of Section
LAWNS AND GRASSES 02920 - 1
SECTION 02920 - LAWNS AND GRASSES
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 1 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section Includes:
1. Sodding.
2. Warranty / Satisfactory Turf / Seed.
3. Maintenance.
B. Related Sections:
1. Division 2 Section "Site Clearing" for protection of existing trees and plantings, topsoil
stripping and stockpiling and site clearing.
2. Division 2 Section "Irrigation Systems" for sprinkler irrigation.
3. Division 2 Section "Exterior Plants" for border edgings.
1.3 DEFINITIONS
A. Finish Grade: Elevation of finished surface of planting soil.
B. Planting Soil: Existing or imported topsoil, manufactured topsoil, or surface soil modified to
become topsoil; mixed with soil amendments.
C. Sub-grade: Surface or elevation of subsoil remaining after completing excavation, or top
surface of a fill or backfill immediately beneath planting soil.
D. Sub-soil: All soil beneath the topsoil layer of the soil profile, and typified by the lack of organic
matter and soil organisms.
1.4 SUBMITTALS
A. Product Data: For each type of product indicated.
1. Certification of each seed mixture for turfgrass sod, identifying source, including name
and telephone number of supplier.
LAWNS AND GRASSES 02920 - 2
B. Samples for Verification:
1. Soil Analysis: Submit copies of soil test results from Colorado State University Soils
Laboratory. Submit copies of cover letter / results with recommendations.
2. Fertilizer: Submit copy of fertilizer composition to be used and the Supplier source.
C. Product Certificates: For each type of manufactured product from Manufacturer, and
complying with the following:
1. Manufacturer’s certified analysis for standard products.
2. Analysis of other materials by a recognized laboratory made according to methods
established by the Association of Official Analytical Chemists, where applicable.
D. Material Test Reports: For existing surface topsoil (if available) and/or imported topsoil if
required.
E. Planting Schedule: Indicating anticipated planting dates for each type of planting.
F. Maintenance Instructions: Recommended procedures to be established by Owner for
maintenance of turf areas during the warranty period. Submit before Substantial completion.
1.5 QUALITY ASSURANCE
A. Installer Qualifications: A qualified landscape installer whose work has resulted in successful
lawn establishment.
1. Installer's Field Supervision: Require Installer to maintain an experienced full-time
supervisor on Project site when planting is in progress.
B. Soil-Testing Laboratory Qualifications: An independent laboratory, recognized by the State
Department of Agriculture, with the experience and capability to conduct the testing indicated
and that specializes in types of tests to be performed.
C. Topsoil Analysis: Furnish soil analysis by a qualified soil-testing laboratory stating percentages
of organic matter; gradation of sand, silt, and clay content; cation exchange capacity; sodium
absorption ratio; deleterious material; pH; and mineral and plant-nutrient content of topsoil.
1. Report suitability of topsoil for lawn growth. State-recommended quantities of nitrogen,
phosphorus, and potash nutrients and soil amendments to be added to produce
satisfactory topsoil.
1.6 DELIVERY, STORAGE, AND HANDLING
A. Sod: Harvest, deliver, store, and handle sod according to requirements in TPI's "Specifications
for Turfgrass Sod Materials" and "Specifications for Turfgrass Sod Transplanting and
Installation" in its "Guideline Specifications to Turfgrass Sodding." Deliver sod in time for
planting within twenty-four (24) hours of harvesting. Protect sod from breakage and drying.
LAWNS AND GRASSES 02920 - 3
B. Bulk Materials:
1. Do not dump or store bulk materials near structures, utilities, walkways and pavements,
or on existing turf areas or plants.
2. Provide erosion-control measures to prevent erosion or displacement of bulk materials,
discharge of soil-bearing water runoff, and airborne dust reaching adjacent properties,
water conveyance systems, or walkways.
3. Accompany each delivery of bulk fertilizers and soil amendments with appropriate
certificates.
1.7 PROJECT CONDITIONS
A. Planting Restrictions: Plant during one of the following periods. Coordinate planting periods
with initial maintenance periods to provide required maintenance from date of Substantial
Completion.
1. Sod: May – August.
B. Weather Limitations: Proceed with planting only when existing and forecasted weather
conditions permit.
1.8 MAINTENANCE SERVICE
A. Initial Lawn Maintenance Service: Provide full maintenance by skilled employees of landscape
Installer. Maintain as required in Part 3. Begin maintenance immediately after each area is
planted and continue until acceptable lawn is established, but for not less than the following
periods:
1. Sodded Lawns: 1 year from date of Substantial Completion.
B. Initial Sod Maintenance Service: Provide full maintenance by skilled employees of landscape
Installer. Maintain as required in Part 3. Begin maintenance immediately after each area is
planted and continue until acceptable sod is established, but for not less than 40 days from date
Substantial Completion
PART 2 - PRODUCTS
2.1 TURF GRASS SOD
A. Turfgrass Sod: Certified Approved Number 1 Quality/Premium, including limitations on
thatch, weeds, diseases, nematodes, and insects, complying with TPI's "Specifications for
Turfgrass Sod Materials" in its "Guideline Specifications to Turfgrass Sodding." Furnish viable
sod of uniform density, color, and texture, strongly rooted, and capable of vigorous growth and
development when planted.
LAWNS AND GRASSES 02920 - 4
B. Turfgrass Species: Sod of grass species as follows, with not less than ninety-five (95) percent
germination, not less than eighty-five (85) percent pure seed, and not more than one-half (1/2)
percent weed seed:
1. Colorado Buffalo Blend from Turfmaster Farms (970) 493-8311
2.2 TOPSOIL
A. Planting Soil: Imported topsoil or manufactured topsoil from off-site sources. Obtain topsoil
displaced from naturally well-drained construction or mining sites where topsoil occurs at least
4 inches deep; do not obtain from agricultural land, bogs or marshes.
1. Additional Properties of Imported Topsoil or Manufactured Topsoil: Screened and free
of stones 1 inch or larger in any dimension; free of roots, plants, sod, clods, clay lumps,
pockets of coarse sand, paint, paint washout, concrete slurry, concrete layers or chunks,
cement, plaster, building debris, oils, gasoline, diesel fuel, paint thinner, turpentine, tar,
roofing compound, acid, and other extraneous materials harmful to plant growth; free of
obnoxious weeds and invasive plants including quackgrass, Johnsongrass, poison ivy,
nutsedge, nimblewill, Canada thistle, bindweed, bentgrass, wild garlic, ground ivy,
perennial sorrel, and bromegrass; not infested with nematodes, grubs, other pests, pest
eggs, or other undesirable organisms and disease-causing plant pathogens; friable and
with sufficient structure to give good tilth and aeration. Continuous, air-filled, pore-
space content on a volume/volume basis shall be at least fifteen (15) percent when
moisture is present at field capacity. Soil shall have a field capacity of at least fifteen
(15) percent on a dry weight basis.
2. Mix imported topsoil or manufactured topsoil with the following soil amendments in the
following quantities to produce planting soil:
a. Ratio of Loose Compost to Topsoil by Volume: 1:3
B. Planting Soil: Onsite / Stockpiled topsoil
1. Re-use surface soil stockpiled onsite. Verify suitability of stockpiled soil to produce
topsoil. Clean surface soil of roots, plants, sod, stone, clay lumps and other extraneous
materials harmful to plant growth.
a. Supplement with imported or manufactured topsoil from off-site sources, when
quantities are insufficient. See Item A. above.
2.3 ORGANIC SOIL AMENDMENTS
A. Organic amendment shall be Class 1 as defined by the Rocky Mountain Region Organics
Council.
2.4 FERTILIZER
A. Fertilizer for turf shall be commercial type, of uniform composition, free flowing, and
conforming to applicable state and federal laws.
LAWNS AND GRASSES 02920 - 5
B. Fertilizer shall be formulated to meet the recommendations of the Colorado State University
soil-testing laboratory for turf fertilization.
2.5 PESTICIDES AND HERBICIDES
A. General: Pesticide, registered and approved by EPA, acceptable to authorities having
jurisdiction, and of type recommended by manufacturer for each specific problem and as
required for Project conditions and application. Do not use restricted pesticides unless
authorized in writing by authorities having jurisdiction.
B. Pre-Emergent Herbicide (Selective and Non-Selective): Effective for controlling the
germination or growth of weeds within planted areas at the soil level directly below the mulch
layer. EPA registered and approved, of type recommended by manufacturer for application.
C. Post-Emergent Herbicide (Selective and Non-Selective): Effective for controlling weed growth
that has already germinated. EPA registered and approved, of type recommended by
manufacturer for application.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Examine areas to receive lawns and grass for compliance with requirements and other
conditions affecting performance.
B. Proceed with installation only after unsatisfactory conditions have been corrected.
3.2 PREPARATION
A. Protect structures, utilities, sidewalks, pavements, and other facilities, trees, shrubs, and
plantings from damage caused by planting operations.
1. Protect adjacent and adjoining areas from hydro-seeding and hydro-mulching overspray.
2. Protect grade stakes set by others until directed to remove them.
B. Provide erosion-control measures to prevent erosion or displacement of soils and discharge of
soil-bearing water runoff or airborne dust to adjacent properties and walkways.
3.3 SOIL AND FINISHED GRADE PREPARATION
A. Limit sub-grade preparation to areas to be planted with sod. Verify rough grading provided is
within one-tenth of a foot. Verify major drainage channels are completed and in place. Do not
start work until the site is acceptable. Once landscape grading has commenced, the landscape
contractor shall be responsible for bringing all grading to final line and grade.
LAWNS AND GRASSES 02920 - 6
B. Stockpiled/New Imported Topsoil: Spread topsoil to a minimum depth of 4” in areas as
delineated on the plans. Place topsoil during dry weather and on dry, unfrozen subgrade.
Remove vegetable matter and foreign non-organic material from topsoil while spreading.
C. Soil Amendment (compost):
1. Sodded Areas: Spread organic amendment at a rate of 3 CY / 1,000 s.f. Do not spread if
organic amendment or sub-grade is frozen, muddy, or excessively wet.
D. Sub-grades: Loosen sub-grade to a minimum depth of twelve (12) inches overall (8” of existing
subgrade and 4” of new topsoil). Remove stones and clods larger than one inch (1”) in any
dimension and sticks, roots, rubbish, and other extraneous matter and legally dispose of them
off Owner's property. Repeat cultivation in areas where equipment, used for hauling and
spreading topsoil, has re-compacted subsoil.
E. Finish / Fine Grading: Grade disturbed planting areas to a smooth, uniform surface plane with
loose, uniformly fine texture. Grade to within plus or minus one-half (1/2) inch of finish
elevation. Roll and rake, remove ridges, and fill depressions to meet finish grades. Limit finish
grading to areas that can be planted in the immediate future.
1. Reduce elevation of planting soil to allow for soil thickness of sod.
2. In seeded areas, reduce elevation of finished surface to ½” below the adjacent pavement /
curb elevation.
F. Moisten prepared lawn areas before planting if soil is dry. Water thoroughly and allow surface
to dry before planting. Do not create muddy soil.
G. Before planting, restore areas if eroded or otherwise disturbed after finish grading.
3.4 SODDING
A. Lay sod within twenty-four (24) hours of harvesting. Do not lay sod if dormant or if ground is
frozen or muddy.
B. Lay sod to form a solid mass with tightly fitted joints. Butt ends and sides of sod; do not stretch
or overlap. Stagger sod strips or pads to offset joints in adjacent courses. Avoid damage to sub-
grade or sod during installation. Tamp and roll lightly to ensure contact with subgrade,
eliminate air pockets, and form a smooth surface. Work sifted soil or fine sand into minor
cracks between pieces of sod; remove excess to avoid smothering sod and adjacent grass.
1. Lay sod across angle of slopes exceeding 1:3.
2. Anchor sod on slopes exceeding 1:3 with wood pegs or steel staples spaced as
recommended by sod Supplier but not less than two (2) anchors per sod strip to prevent
slippage.
C. Saturate sod with fine water spray within two hours of planting. During first week after
planting, water daily or more frequently as necessary to maintain moist soil to a minimum depth
of 1-1/2 inches below sod.
LAWNS AND GRASSES 02920 - 7
3.5 TURF RENOVATION
A. Renovate existing turf.
B. Renovate existing turf damaged by Contractor's operations, such as storage of materials or
equipment and movement of vehicles.
1. Re-establish turf where settlement or washouts occur or where minor re-grading is
required.
2. Provide new topsoil as required.
C. Remove sod and vegetation from diseased or unsatisfactory lawn areas; do not bury in soil.
D. Remove topsoil containing foreign materials resulting from Contractor's operations, including
oil drippings, fuel spills, stone, gravel, and other construction materials, and replace with new
topsoil.
E. Mow, dethatch, core aerate, and rake existing turf.
F. Remove weeds before seeding. Where weeds are extensive, apply selective herbicides as
required. Do not use pre-emergence herbicides.
G. Remove waste and foreign materials, including weeds, soil cores, grass, vegetation, and turf,
and legally dispose of them off Owner's property.
H. Till stripped, bare, and compacted areas thoroughly to a soil depth of 6 inches.
I. Apply soil amendments and initial fertilizers required for establishing new lawns and mix
thoroughly into top four (4) inches of existing soil. Provide new planting soil to fill low spots
and meet finish grades.
J. Water newly planted areas and keep moist until new lawn is established.
3.6 TURF MAINTENANCE
A. Maintain and establish lawn by watering, fertilizing, weeding, mowing, trimming, replanting,
and other operations. Roll, re-grade, and re-plant bare or eroded areas and re-mulch to produce
a uniformly smooth lawn. Provide materials and installation the same as those used in the
original installation.
1. Fill in as necessary soil subsidence that may occur because of settling or other processes.
Replace materials and turf damaged or lost in areas of subsidence.
2. In areas where mulch has been disturbed by wind or maintenance operations, add new
mulch and anchor as required to prevent displacement.
3. Apply treatments as required to keep turf and soil free of pests and pathogens or disease.
Use integrated pest management practices whenever possible to minimize the use of
pesticides and reduce hazards.
B. Watering: Provide and maintain temporary piping, hoses, and lawn-watering equipment to
convey water from sources and to keep lawn uniformly moist to a depth of four (4) inches.
LAWNS AND GRASSES 02920 - 8
1. Schedule watering to prevent wilting, puddling, erosion, and displacement of seed or
mulch. Lay out temporary watering system to avoid walking over muddy or newly
planted areas.
2. Water turf with fine spray at a minimum rate of one (1) inch per week unless rainfall
precipitation is adequate.
C. Turf Post-fertilization: Apply fertilizer after initial mowing and when grass is dry.
1. Use fertilizer that will provide actual nitrogen of at least 1 lb/1000 sq. ft. to lawn area.
3.7 WARRANTY / SATISFACTORY TURF
A. Lawn installations shall meet the following criteria as determined by Owner’s Representative:
1. Satisfactory Seeded Turf: At end of warranty period, a healthy, uniform, close stand of
grass has been established, free of weeds and surface irregularities, with coverage
exceeding 90 percent over any 10 sq. ft. and bare spots not exceeding 5 by 5 inches.
2. Satisfactory Sodded Turf: At end of maintenance period, a healthy, well-rooted, even-
colored, viable lawn has been established, free of weeds, open joints, bare areas, and
surface irregularities.
3.8 PESTICIDE APPLICATION
A. Apply pesticides and other chemical products and biological control agents in accordance with
requirements of authorities having jurisdiction and manufacturer's written recommendations.
Coordinate applications with Owner's operations and others in proximity to the Work. Notify
Owner before each application is performed.
B. Post-Emergent Herbicides (Selective and Non-Selective): Apply only as necessary to treat
already-germinated weeds and in accordance with manufacturer's written recommendations.
3.9 CLEANUP AND PROTECTION
A. Promptly remove soil and debris, created by lawn work, from paved areas. Clean wheels of
vehicles before leaving site to avoid tracking soil onto roads, walks, or other paved areas.
B. Erect temporary fencing or barricades and warning signs as required to protect newly planted
areas from traffic. Maintain fencing and barricades throughout initial maintenance period and
remove after lawn is established.
C. Remove non-degradable erosion-control measures after grass establishment period.
END OF SECTION 02920
EXTERIOR PLANTS 02950 - 1
SECTION 02950 – EXTERIOR PLANTS
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section Includes:
1. Warranty.
2. Maintenance Service.
3. Trees, Shrubs and Perennials.
4. Inorganic and Organic Soil Amendments.
5. Fertilizers – not required.
6. Planting soils.
7. Soil Amendments.
8. Mulch.
9. Tree stabilization.
B. Related Sections:
1. Section "Tree Protection and Trimming" for protecting, trimming, pruning, repairing, and
replacing existing trees to remain that interfere with, or are affected by execution of the
work.
2. Section "Site Clearing" for protection of existing trees and plantings, topsoil stripping
and stockpiling, and site clearing.
3. Section "Turf and Grasses" for sodding and native grass seeding.
1.3 DEFINITIONS
A. Backfill: The earth used to replace or the act of replacing earth in an excavation.
B. Balled and Burlapped Stock: Exterior plants dug with firm, natural balls of earth in which they
are grown, with ball size not less than diameter and depth recommended by ANSI Z60.1 for
type and size of tree or shrub required; wrapped, tied, rigidly supported, and drum laced as
recommended by ANSI Z60.1.
C. Balled and Potted Stock: Exterior plants dug with firm, natural balls of earth in which they are
grown and placed, unbroken, in a container. Ball size is not less than diameter and depth
recommended by ANSI Z60.1 for type and size of exterior plant required.
D. Bare-Root Stock: Exterior plants with a well-branched, fibrous-root system developed by
transplanting or root pruning, with soil or growing medium removed, and with not less than
minimum root spread according to ANSI Z60.1 for type and size of exterior plant required.
EXTERIOR PLANTS 02950 - 2
E. Clump: Where three or more young trees were planted in a group and have grown together as a
single tree having three or more main stems or trunks.
F. Container-Grown Stock: Healthy, vigorous, well-rooted exterior plants grown in a container
with well-established root system reaching sides of container and maintaining a firm ball when
removed from container. Container shall be rigid enough to hold ball shape and protect root
mass during shipping and be sized according to ANSI Z60.1 for type and size of exterior plant
required.
G. Finish Grade: Elevation of finished surface of planting soil.
H. Manufactured Topsoil: Soil produced off-site by homogeneously blending mineral soils or sand
with stabilized organic soil amendments to produce topsoil or planting soil.
I. Multi-Stem: Where three or more main stems arise from the ground from a single root crown or
at a point right above the root crown.
J. Planting Soil: Standardized topsoil; existing, native surface topsoil; existing, in-place surface
soil; imported topsoil; or manufactured topsoil that is modified with soil amendments and
perhaps fertilizers to produce a soil mixture best for plant growth.
K. Planting Area: Areas to be planted.
L. Subgrade: Surface or elevation of subsoil remaining after completing excavation, or top surface
of a fill or backfill, before placing planting soil.
M. Subsoil: All soil beneath the topsoil layer of the soil profile, and typified by the lack of organic
matter and soil organisms.
1.4 SUBMITTALS
A. Product Data: For each type of product indicated.
B. Samples for Verification: For each of the following:
1. 1 lb (2.2 kg) of mulch for each type, in labeled plastic bags. Each Sample shall be typical
of the lot of material to be furnished; provide an accurate representation of color, texture,
and makeup.
2. Tree stabilization materials (stakes, guys, webbing).
3. Soil Amendment (Compost): 1-quart volume of compost required; in sealed plastic bags
labeled with composition of materials by percentage of weight and source of material.
4. Trees and Shrubs: See 1.5 - D. below.
C. Product Certificates: For each type of manufactured product, from manufacturer, and
complying with the following:
1. Manufacturer's certified analysis for standard products.
2. Analysis of other materials by a recognized laboratory made according to methods
established by the Association of Official Analytical Chemists, where applicable.
EXTERIOR PLANTS 02950 - 3
D. Material Test Reports: For soil amendment (compost). Provide product name, full analysis,
supplier name and phone number.
E. Planting Schedule: Indicating anticipated planting dates for exterior plants.
F. Warranty: Sample of special warranty.
1.5 QUALITY ASSURANCE
A. Installer Qualifications: A qualified landscape installer whose work has resulted in successful
establishment of exterior plants.
B. Soil-Testing Laboratory Qualifications: An independent laboratory, recognized by the State
Department of Agriculture, with the experience and capability to conduct the testing indicated
and that specializes in types of tests to be performed.
C. Topsoil Analysis: not required.
D. Provide quality, size, genus, species, and variety of exterior plants indicated, complying with
applicable requirements in ANSI Z60.1, "American Standard for Nursery Stock."
1. Selection of exterior plants purchased under allowances will be made by Owner’s
Representative, who will tag plants at their place of growth before they are prepared for
transplanting.
E. Tree and Shrub Measurements: Measure according to ANSI Z60.1 with branches and trunks or
canes in their normal position. Do not prune to obtain required sizes. Take caliper
measurements 6 inches above the ground for trees up to 4-inch caliper size, and 12 inches above
the ground for larger sizes. Measure main body of tree or shrub for height and spread; do not
measure branches or roots tip-to-tip.
F. Observation: Owner’s Representative may observe trees and shrubs either at place of growth or
at site before planting for compliance with requirements for genus, species, variety, size, and
quality. Owner’s Representative retains right to observe trees and shrubs further for size and
condition of balls and root systems, insects, injuries, and latent defects and to reject
unsatisfactory or defective material at any time during progress of work. Remove rejected trees
or shrubs immediately from Project site.
1. Notify Owner’s Representative of sources of planting materials seven days in advance of
delivery to site.
1.6 DELIVERY, STORAGE, AND HANDLING
A. Packaged Materials: Deliver packaged materials in original, unopened containers showing
weight, certified analysis, name and address of manufacturer, and indication of conformance
with state and federal laws if applicable.
B. Bulk Materials:
EXTERIOR PLANTS 02950 - 4
1. Do not dump or store bulk materials near structures, utilities, walkways and pavements,
or on existing turf areas or plants.
2. Provide erosion-control measures to prevent erosion or displacement of bulk materials,
discharge of soil-bearing water runoff, and airborne dust reaching adjacent properties,
water conveyance systems, or walkways.
3. Accompany each delivery of bulk fertilizers, lime (if required), and soil amendments with
appropriate certificates.
C. Deliver exterior plants freshly dug.
D. Do not prune trees and shrubs before delivery. Protect bark, branches, and root systems from
sun scald, drying, sweating, whipping, and other handling and tying damage. Do not bend or
bind-tie trees or shrubs in such a manner as to destroy their natural shape. Provide protective
covering of exterior plants during delivery. Do not drop exterior plants during delivery and
handling.
E. Handle planting stock by root ball.
F. Deliver exterior plants after preparations for planting have been completed and install
immediately. If planting is delayed more than six (6) hours after delivery, set exterior plants
and trees in shade, protect from wind and sun, and mechanical damage, and keep roots/root
balls moist and covered with bark mulch as described below:
1. Set balled stock on ground and cover ball with soil, peat moss, sawdust, or other
acceptable material.
2. Do not remove container-grown stock from containers before time of planting.
3. Water root systems of exterior plants stored on-site with a fine-mist spray. Water as
often as necessary to maintain root systems in a moist condition.
1.7 PROJECT CONDITIONS
A. Field Measurements: Verify actual grade elevations, service and utility locations, irrigation
system components, and dimensions of plantings and construction contiguous with new
plantings by field measurements before proceeding with planting work.
B. Interruption of Existing Services or Utilities (including agricultural ditches): Do not interrupt
services or utilities to facilities occupied by the City or others unless permitted under the
following conditions and then only after arranging to provide temporary services or utilities
according to requirements indicated:
1. Notify the City no fewer than two days in advance of proposed interruption of each
service or utility.
C. Do not proceed with interruption of services or utilities without Owner's written permission.
D. Planting Restrictions: Plant during one of the following periods. Coordinate planting periods
with maintenance periods to provide required maintenance from date of Substantial Completion.
1. Spring Planting: March 15 through June 1.
2. Fall Planting: September 1 through October 15.
EXTERIOR PLANTS 02950 - 5
E. Weather Limitations: Proceed with planting only when existing and forecasted weather
conditions permit planting to be performed when beneficial and optimum results may be
obtained.
F. Coordination with Seeded and Sodded areas: Plant trees and shrubs after finish grades are
established and before seeding or sodding.
1. When planting trees and shrubs or other plants after installed seeded or sod, protect turf
areas and promptly repair damage caused by planting operations.
1.8 WARRANTY
A. Special Warranty: Installer agrees to repair or replace plantings and accessories that fail in
materials, workmanship, or growth within specified warranty period.
1. Failures include, but are not limited to, the following:
a. Death and unsatisfactory growth, except for defects resulting from lack of adequate
maintenance, neglect, abuse by the City, or incidents that are beyond Contractor's
control.
b. Structural failures including plantings falling or blowing over.
c. Faulty performance of tree stabilization.
d. Deterioration of metals, metal finishes, and other materials beyond normal
weathering.
2. Warranty Periods from Date of Substantial Completion:
a. Trees and Shrubs: One year.
b. Ornamental Grasses: One year.
c. Ground Cover, Perennials and other Plants: One year.
d. Annuals: Two months.
3. Include the following remedial actions as a minimum:
a. Immediately remove dead plants and replace in the succeeding planting season.
b. Replace exterior plants that are more than 25 percent dead or in an unhealthy
condition at end of warranty period.
c. A limit of one (1) replacement of each exterior plant will be required except for
losses or replacements due to failure to comply with requirements.
d. Provide extended warranty for replaced plant materials; warranty period equal to
original warranty period.
1.9 MAINTENANCE SERVICE
A. Initial Maintenance Service for Trees, Shrubs, Ornamental Grasses and Perennials: Provide full
maintenance by skilled employees of landscape Installer. Maintain as required in Part 3. Begin
maintenance immediately after each area is planted and continue until plantings are acceptably
healthy and well established, but for not less than maintenance period below.
EXTERIOR PLANTS 02950 - 6
1. Maintenance Period: From initial planning to Substantial Completion.
B. Continuing Maintenance Proposal: not required. City will take over maintenance
responsibilities following Substantial Completion.
1.10 ADDITIONAL REQUIREMENTS
A. All workmanship, products, materials and methods shall meet the current City of Boulder
Design and Construction Standards. Contractor is solely responsible for obtaining the most
current version of these standards and notifying the City’s Project Manager of and
discrepancies with these specifications prior to commencing work related to this project.
PART 2 - PRODUCTS
2.1 PLANT MATERIAL
A. General: Furnish nursery-grown plants true to genus, species, variety, cultivar, stem form,
shearing, and other features indicated in Plant Schedule or Plant Legend shown on Drawings
and complying with ANSI Z60.1; and with healthy buds, stems and bark; and healthy root
systems developed by transplanting or root pruning. Provide well-shaped, fully branched,
healthy, vigorous stock, densely foliated when in leaf and free of disease, pests, eggs, larvae,
and defects such as knots, sun scald, injuries, abrasions, and disfigurement.
1. Trees with damaged, crooked, or multiple leaders; tight vertical branches where bark is
squeezed between two branches or between branch and trunk ("included bark"); crossing
trunks; cut-off limbs more than 3/4 inch (19 mm) in diameter; with stem girdling roots; or
root flares below the top of the root ball will be rejected.
2. Collected Stock: Do not use plants harvested from the wild, from native stands, from an
established landscape planting, or not grown in a nursery unless otherwise indicated.
B. All trees and shrubs shall be freshly dug at time of delivery, unless they are container-grown.
Plants that have been heeled-in for more than 1 month or that exhibit roots outside the original
ball shall not be accepted.
C. Provide plants of sizes, grades, and ball or container sizes complying with ANSI Z60.1 for types
and form of plants required. Plants of a larger size may be used if acceptable to Architect, with
a proportionate increase in size of roots or balls.
D. Root-Ball Depth: Furnish trees and shrubs with root balls measured from top of root ball,
which shall begin at root flare according to ANSI Z60.1. Root flare shall be visible before
planting, requiring hand excavation, refer to planting details.
E. If formal arrangements or consecutive order of plants is shown on Drawings, select stock for
uniform height and spread, and number the labels to assure symmetry in planting.
EXTERIOR PLANTS 02950 - 7
2.2 INORGANIC SOIL AMENDMENTS
A. Sulfur: Granular, biodegradable, containing a minimum of 90 percent sulfur, with a minimum
of 99 percent passing through No. 6 (3.35-mm) sieve and a maximum of 10 percent passing
through No. 40 (0.425-mm) sieve.
B. Iron Sulfate: Granulated ferrous sulfate containing a minimum of 20 percent iron and 10
percent sulfur.
C. Aluminum Sulfate: Commercial grade, unadulterated.
D. Perlite: Horticultural perlite, soil amendment grade.
E. Agricultural Gypsum: Finely ground, containing a minimum of 90 percent calcium sulfate.
F. Sand: Clean, washed, natural or manufactured, free of toxic materials.
G. Diatomaceous Earth: Calcined, diatomaceous earth, 90 percent silica, with approximately 140
percent water absorption capacity by weight.
H. Zeolites: Mineral clinoptilolite with at least 60 percent water absorption by weight.
2.3 ORGANIC SOIL AMENDMENTS
A. Compost: Fully-composted, stable, and weed-free organic matter, pH range of 5.5 to 8;
moisture content 35 to 55 percent by weight; 100 percent passing through 1/2-inch (13-mm)
sieve; soluble salt content of not exceeding a maximum of 5 mmhos/cm; not exceeding 0.5
percent inert contaminants and free of substances toxic to plantings; and as follows:
1. Organic Matter Content: 50 to 60 percent of dry weight.
2. Feedstock: Agricultural, food, or industrial residuals; biosolids; yard trimmings; or
source-separated or compostable mixed solid waste.
B. Mountain Peat: Not to be used on this project.
C. Sphagnum Peat: Not to be used on this project.
D. Muck Peat: Not to be used on this project.
E. Wood Derivatives: Decomposed, nitrogen-treated sawdust, ground bark, or wood waste; of
uniform texture and free of chips, stones, sticks, soil, or toxic materials.
1. In lieu of decomposed wood derivatives, mix partially decomposed wood derivatives
with ammonium nitrate at a minimum rate of 0.15 lb/cu. ft. (2.4 kg/cu. m) of loose
sawdust or ground bark, or with ammonium sulfate at a minimum rate of 0.25 lb/cu. ft. (4
kg/cu. m) of loose sawdust or ground bark.
F. Manure: Well-rotted, unleached, stable or cattle manure containing not more than 25 percent by
volume of straw, sawdust, or other bedding materials; free of toxic substances, stones, sticks,
soil, weed seed, debris, and material harmful to plant growth.
EXTERIOR PLANTS 02950 - 8
G. FERTILIZER
1. Fertilizer for trees, shrubs, and perennials shall be Osmocote Plus, 9 month slow release
fertilizer for northern states. Apply per manufacturer's recommendations.
2. Treble superphosphate (for perennial, ornamental grass, and annual beds only).
Commercially available brand. Submit proposed formulation and company name.
2.4 PLANTING SOILS
A. Planting Soil: Existing, in-place surface soil. Verify suitability of existing surface soil to
produce viable planting soil. Remove stones, roots, plants, sod, clods, clay lumps, pockets of
coarse sand, concrete slurry, concrete layers or chunks, cement, plaster, building debris, and
other extraneous materials harmful to plant growth. Stockpile material on-site for future use in
appropriate quantity. Mix surface soil with soil amendments and fertilizers as specified
elsewhere in this specification.
1. Ratio of Loose Compost to Surface Soil by Volume: 3 cubic yards per 1,000 SF
minimum.
2.5 MULCHES
A. Organic Mulch: Free from deleterious materials and used as a top dressing of trees, shrubs and
ornamental grasses, consisting of one of the following:
1. Type: Ground or shredded bark.
2. Size Range: 3 inches (76 mm) maximum, 1/2 inch (13 mm) minimum.
3. Color: Dark Brown
B. In-organic (rock) Mulch: Hard, durable stone, washed free of loam, sand, clay, and other
foreign substances, of following type, size range, and color:
1. Type 1: 1.5” - 2” Poudre River Rock or approved equal
a. Size Range: 1.5”-2”
b. Color: Uniform tan-beige color range acceptable to Owners Representative
c. Depth: 3” minimum
d. Source: Timberrock Landscape Center (970) 686-0442 or approved equal.
2. Type 2: 6” – 9” Rose Rip Rap
a. Size Range: 6” – 9”
b. Color: Rose
c. Depth: 6” minimum
d. Source: Timberrock Landscape Center (970) 686-0442 or approved equal.
EXTERIOR PLANTS 02950 - 9
2.6 WEED-CONTROL BARRIERS
A. Mirafi 140, Typar 3341, or Polyspun 300 or approved equivalent.
B. Weed barriers shall be provided beneath in-organic (rock) mulch areas only, to include cobble
swale and planting areas adjacent building perimeter.
2.7 TREE STABILIZATION MATERIALS
A. Stakes and Guys:
1. Upright and Guy Stakes: Green 6-foot steel tee posts with blade with permanent plastic
or rubber/urethane protective cap.
2. Guys and Tie Wires: ASTM A 641/A 641M, Class 1, galvanized-steel wire, two-strand,
twisted, 0.106 inch (2.7 mm) in diameter.
3. Tree-Tie Webbing: 2-inch wide (minimum) UV-resistant nylon/cotton blend webbing
with heat sealed ends, tensile strength of 1000 pounds minimum, and brass grommets.
4. Guy Cables: 12-guage minimum galvanized steel with PVC sleeve completely covering
area between guy stake and tree-tie webbing.
5. Flags: Standard surveyor's plastic flagging tape, white, minimum 6 inches (150 mm)
long.
2.8 LANDSCAPE EDGINGS
A. Steel Header: Standard commercial-steel header, rolled edge, fabricated in sections of standard
lengths, with loops stamped from or welded to face of sections to receive stakes.
1. Manufacturers: Subject to compliance with requirements, available manufacturers
offering products that may be incorporated into the Work include, but are not limited to,
the following:
a. Ryerson Steel.
b. Approved substitute.
2. Header Size: minimum of 1/8 inch wide by 4” inches deep (must be rolled top or
equivalent).
3. Stakes: Tapered steel, a minimum of twelve inches (12”).
4. Accessories: Standard tapered ends, corners and splicers.
5. Finish: Standard green paint.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Examine areas to receive plants for compliance with requirements and conditions affecting
installation and performance.
EXTERIOR PLANTS 02950 - 10
1. Verify that no foreign or deleterious material or liquid such as paint, paint washout,
concrete slurry, concrete layers or chunks, cement, plaster, oils, gasoline, diesel fuel,
paint thinner, turpentine, tar, roofing compound, or acid has been deposited in soil within
a planting area.
2. Do not mix or place soils and soil amendments in frozen, wet, or muddy conditions.
3. Suspend soil spreading, grading, and tilling operations during periods of excessive soil
moisture until the moisture content reaches acceptable levels to attain the required results.
4. Uniformly moisten excessively dry soil that is not workable and which is too dusty.
B. Proceed with installation only after unsatisfactory conditions have been corrected.
C. If contamination by foreign or deleterious material or liquid is present in soil within a planting
area, remove the soil and contamination as directed by Architect and replace with new planting
soil.
3.2 PREPARATION
A. Protect structures, utilities, sidewalks, pavements, and other facilities and turf areas and existing
plants from damage caused by planting operations.
B. Install erosion-control measures to prevent erosion or displacement of soils and discharge of
soil-bearing water runoff or airborne dust to adjacent properties and walkways.
C. Lay out individual tree and shrub locations and areas for multiple plantings. Stake locations,
outline areas, adjust locations when requested, and obtain the City’s acceptance of layout before
excavating or planting. Make minor adjustments as required.
D. Wrap trees and shrubs with burlap fabric over trunks, branches, stems, twigs, and foliage to
protect from wind and other damage during digging, handling, and transportation.
3.3 PLANTING BED ESTABLISHMENT
A. Loosen subgrade of planting areas to a minimum depth of 12 inches (300 mm). Remove stones
larger than 1 inch (25 mm) in any dimension and sticks, roots, rubbish, and other extraneous
matter and legally dispose of them off Owner's property.
1. Thoroughly blend planting soil off-site before spreading or spread topsoil, apply soil
amendments on surface, and thoroughly blend planting soil.
2. Spread planting soil to required depth not less than required to meet finish grades after
natural settlement. Do not spread if planting soil or subgrade is frozen, muddy, or
excessively wet.
B. Finish Grading: Grade planting areas to a smooth, uniform surface plane with loose, uniformly
fine texture. Roll and rake, remove ridges, and fill depressions to meet finish grades.
C. Before planting, obtain Architect's acceptance of finish grading; restore planting areas if eroded
or otherwise disturbed after finish grading.
EXTERIOR PLANTS 02950 - 11
3.4 EXCAVATION FOR TREES AND SHRUBS
A. Planting Pits and Trenches: Excavate circular planting pits with sides sloping inward at a 45-
degree angle. Excavations with vertical sides are not acceptable. Trim perimeter of bottom
leaving center area of bottom raised slightly to support root ball and assist in drainage away
from center. Do not further disturb base. Ensure that root ball will sit on undisturbed base soil
to prevent settling. Scarify sides of planting pit smeared or smoothed during excavation.
1. Excavate approximately three times as wide as ball diameter for balled and burlapped and
container-grown stock.
2. Excavate at least 12 inches (300 mm) wider than root spread and deep enough to
accommodate vertical roots for bare-root stock.
3. Do not excavate deeper than depth of the root ball, measured from the root flare to the
bottom of the root ball.
4. If area under the plant was initially dug too deep, add soil to raise it to the correct level
and thoroughly tamp the added soil to prevent settling.
5. Maintain required angles of repose of adjacent materials as shown on the Drawings. Do
not excavate subgrades of adjacent paving, structures, hardscapes, or other new or
existing improvements.
6. Maintain supervision of excavations during working hours.
7. Keep excavations covered or otherwise protected overnight, after working hours or when
unattended by Installer's personnel.
B. Subsoil and topsoil removed from excavations may be used as planting soil as part of the
backfill mixture.
C. Obstructions: Notify the City’s Project Manager if unexpected rock or obstructions detrimental
to trees or shrubs are encountered in excavations.
1. Hardpan Layer: Drill 6-inch- (150-mm-) diameter holes, 24 inches (600 mm) apart, into
free-draining strata or to a depth of 10 feet (3 m), whichever is less, and backfill with
free-draining material.
D. Drainage: Notify Architect if subsoil conditions evidence unexpected water seepage or
retention in tree or shrub planting pits.
E. Fill excavations with water and allow to percolate away before positioning trees and shrubs.
3.5 TREE AND SHRUB PLANTING
A. Before planting, verify that root flare is visible at top of root ball according to ANSI Z60.1. If
root flare is not visible, remove soil in a level manner from the root ball to where the top-most
root emerges from the trunk. After soil removal to expose the root flare, verify that root ball
still meets size requirements.
B. Remove stem girdling roots and kinked roots. Remove injured roots by cutting cleanly; do not
break.
C. Set balled and burlapped stock plumb and in center of planting pit or trench with original root
flare 2 inches (50 mm) above adjacent finish grades.
EXTERIOR PLANTS 02950 - 12
1. Use planting soil for portion of backfill mixture.
2. After placing some backfill around root ball to stabilize plant, all materials shall be
carefully and completely removed from the ball and trunk, including but not limited to
plastic, metal, wire, wood, cardboard, paper, fiber, burlap, and twine. Remove pallets, if
any, before setting. Do not use planting stock if root ball is cracked or broken before or
during planting operation.
3. Backfill around root ball in layers, tamping to settle soil and eliminate voids and air
pockets. When planting pit is approximately one-half filled, water thoroughly before
placing remainder of backfill. Repeat watering until no more water is absorbed.
4. All plants shall be placed and kept plumb and straight as the pit is filled with backfill.
Any plant that is not plumb prior to final acceptance shall be rejected.
5. Continue backfilling process. Water again after placing and tamping final layer of soil.
D. When planting on slopes, set the plant so the root flare on the uphill side is flush with the
surrounding soil on the slope; the edge of the root ball on the downhill side will be above the
surrounding soil. Apply enough soil to cover the downhill side of the root ball.
3.6 TREE STABILIZATION
A. Install trunk stabilization as follows unless otherwise indicated:
1. Upright Staking and Tying: For all trees, the contractor shall drive a minimum of three
stakes at least 18 inches (450 mm) below bottom of backfilled excavation and to extend
to the location of branching shown on Drawings above grade. Set vertical stakes and
space to avoid penetrating root balls or root masses.
2. The contractor shall run a double strand of wire through one grommet in the strap, wrap
the strap around trunk at no more than one-third the height of tree, and run wire through
other grommet and back to stake. Strap and wire attachment between the stake and tree
shall be adjusted so that straps are under just enough tension to avoid visible sag in lines.
Rigid guying shall not be accepted. Straps and wires shall be placed so as to be
perpendicular to the trunk. Stakes shall be parallel or slightly angled away from the
trunk.
3. Orient stakes located along walkways so that guying wire is parallel to the direction of
travel.
a. Attach flags to each guy wire, 30 inches above finish grade.
3.7 GROUND COVER AND PLANT PLANTING
A. Set out and space ground cover and plants other than trees, shrubs, and vines as indicated in
even rows with triangular spacing.
B. Use planting soil for backfill.
C. Dig holes large enough to allow spreading of roots.
D. For rooted cutting plants supplied in flats, plant each in a manner that will minimally disturb the
root system but to a depth not less than two nodes.
EXTERIOR PLANTS 02950 - 13
E. Work soil around roots to eliminate air pockets and leave a slight saucer indentation around
plants to hold water.
F. Water thoroughly after planting, taking care not to cover plant crowns with wet soil.
G. Protect plants from hot sun and wind; remove protection if plants show evidence of recovery
from transplanting shock.
3.8 PLANTING AREA MULCHING
A. Mulch backfilled surfaces of planting areas with shredded wood mulch and other areas
indicated.
1. Trees and Tree-like Shrubs in Turf Areas: Apply organic mulch ring of 3-4 inch (75-
mm) (after settlement) average thickness, with 36-inch (600-mm) radius around trunks
or stems. Do not place mulch within 4 inches (150 mm) of trunks or stems.
2. Organic Mulch in Planting Areas: Apply 3-4 inch (75-mm) (after settlement) (50-mm)
average thickness of organic mulch over whole surface of planting area, and finish level
with adjacent finish grades. Do not place mulch within 3 inches (75 mm) of trunks or
stems.
3. Mineral Mulch in Planting Areas: Apply 3-inch (75-mm) Insert dimension average
thickness of mineral mulch over whole surface of planting area, and finish level with
adjacent finish grades. Do not place mulch within 3 inches (75 mm) of trunks or stems.
3.9 PLANT MAINTENANCE
A. Maintain plantings by, cultivating, watering, weeding, mulching, restoring planting saucers,
adjusting and repairing tree-stabilization devices, resetting to proper grades or vertical position,
and performing other operations as required to establish healthy, viable plantings.
B. Fill in as necessary soil subsidence that may occur because of settling or other processes.
Replace mulch materials damaged or lost in areas of subsidence.
C. The Contractor shall remove all stakes and guy wires no more than one (1) year from the date of
tree installation.
3.10 CLEANUP AND PROTECTION
A. During planting, keep adjacent paving and construction clean and work area in an orderly
condition.
B. Protect plants from damage due to landscape operations and operations of other contractors and
trades. Maintain protection during installation and maintenance periods. Treat, repair, or
replace damaged plantings.
C. Immediately after installation remove nursery tags, nursery stakes, tie tape, labels, wire, burlap,
and other debris from plant material, planting areas, and Project site.
EXTERIOR PLANTS 02950 - 14
3.11 DISPOSAL
A. Remove surplus soil and waste material including excess subsoil, unsuitable soil, trash, and
debris and legally dispose of them off the City’s property.
END OF SECTION 02950