HomeMy WebLinkAboutSite Certifications - 05/28/20201/19 Page 1
OVERALL SITE and DRAINAGE CERTIFICATION
Commercial, Multi-Family and Subdivision Certification Form and Checklist
Project Name:
Date:
Building Permit Numbers:
(Commercial or multi-family)
Per the requirement in Fort Collins Stormwater Criteria Manual (FCSCM) Chapter 3, Section 3.0 to certify as-
built construction to the approved drainage and grading plans, please fill in all applicable items in this
Certification Form for Commercial, Multi-Family and Overall Single Family sites. NOTE: several items must be
verified during construction. A copy of the approved grading plan must be submitted with the as-built grading
plan. (As-built elevations must be written in red next to the approved elevations.)
• Use “Yes” for items completed as described.
• Use “N/A” for items that are not applicable to the site being certified.
• If any blanks are “No,” attach an explanation referencing the item number below.
Attach an explanation or description of the as-built condition for any items listed or for anything not listed but
shown on the approved construction plans.
Provide an as-built redline or Mylar drawing with the following:
I. Water Quality and Quantity Detention Basin - FCSCM Ch. 6 and 7
For multiple detention basins on a site, provide the following for each basin separately:
A. Volume: As-built topographic verification is attached at 1-foot (or less) contour intervals and
volume verification calculations for the water quality capture volume and the 100-year detention storage
volume.
1. Detention basin topography was prepared by a professional land surveyor registered in the state
of Colorado.
2. Both proposed and as-built contours are shown on the same plan sheet (dashed lines for
proposed and solid lines for as-built).
3. All critical spot elevations as shown on the approved construction plans have been verified and
the as-built elevations are shown on the plan sheet.
4. Stage-storage-discharge tables are provided on a separate document.
5. Verification that designed drain time is in compliance with Colorado Revised Statute § 37-92-
602(8) is attached and has been uploaded to the Statewide Compliance Portal
(tinyurl.com/COCompliancePortal) for approval. Uploaded documents must include:
a. The cover sheet from the approved drainage report
b. The stamped certification page from the approved drainage report
c. As-built topographic survey
d. Stamped certification page from the Overall Site & Drainage Certification
e. PDF output from the Stormwater Detention and Infiltration Design Data Speadsheet
Lot 18 - Midpoint Drive
11-19-2019
B1607516
Yes
Yes
Yes
Yes
Yes
Yes
1/19 Page 2
B. Water Quality and Quantity Detention Basin Grading: Attached is as-built verification that there is
a minimum 2% positive fall into the concrete trickle pans or flow-line(s) from all areas in the bottom of
the detention pond. If there is a “soft pan” in the flow-line, all areas still must meet the minimum 2%
grade requirement.
1. Low Flow: Choose one of the following detention basin low flow options as applicable:
a. Turf swale for low flow path in detention basin.
There is a minimum 2% grade in the flow-line(s) of the detention basin. The flattest as-built grade
is .
b. Concrete pan for low flow in detention basin.
There is a concrete pan installed that meets the grades as shown on the approved construction
plans. (Show as-built spot elevations.)
c. Soft pan for low flow in detention basin.
• Verify and document the soft pan material gradation, trench width and depth - to be verified
during construction by engineer. Picture documentation is preferred or engineer’s statement of
visual inspection and compliance. (Choose one below.)
o There is a soft pan with an underdrain installed that meets the design on the approved
construction plans. (Show the underdrain grades, bedding material, geotextile, spot elevations,
bends, cleanouts, etc.)
o There is soft pan installed without an underdrain but there is a type A or B soil. The soil
type must be documented by supplying verification from a registered professional geotechnical
engineer.
NOTE: Spot elevations are to be within 0.2 ft. +/-.
2. Side Slopes: The as-built side slopes of the detention basin have been calculated and are shown.
Indicate the side slope with an arrow and a numerical value (e.g., 6.25:1). The maximum slope allowed
is 4:1. Small areas of 3:1 may be acceptable, but slopes steeper than 3:1 must be stabilized or re-
graded. Provide documentation if a variance was granted for steeper slopes during the design process.
3. Spillway: The following items must be field verified:
a. The location of the spillway is indicated on the as-built plan.
b. The width of the spillway is indicated on the as-built plan.
c. The elevation(s) of the spillway is shown on the as-built plan.
d. A concrete ribbon defines the location and grade of the spillway.
e. There is downstream scour protection in the spillway as per the construction plans. Indicate
type: (riprap size “D50” gradation and bedding type, geotextile, buried
riprap with inches of bury, etc.).
f. There are no obstructions in the spillway, such as trees, bushes, sidewalks, landscape
features, rocks, etc.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Concrete
Yes
1/19 Page 3
4. Outlet Structure:
a. The orifice plate for the approved release rate is installed with the correct size and location of
the orifice.
b. The orifice plate for the water quality outlet is installed with the correct hole size, number of
rows and columns of holes.
c. The bottom hole on both the water quality and quantity outlets are at the bottom of the plate
so no water ponds in front of the plate.
d. The well screen is the correct material and is installed as shown on the construction plans.
e. 100-year overflow grate elevation is . (Elev. A on detail D-46)
f. The top elevation of the water quality capture volume is . (Elev. B on detail
D-46)
g. Overflow grate is made of the correct material, has the correct bar spacing, is hinged at the
top and bolted at the bottom.
h. The bottom of the outlet box has no obstructions or misalignments that will cause it to retain
runoff water and is sloped at 2% towards outlet.
II. Channels/Swales - FCSCM Ch. 8, Sec. 2.0 and Ch. 9, Sec. 5.0
A. Capacity: The as-built capacity of all the major channels and swales has been verified. They meet
or exceed capacity requirements shown in the approved drainage study for this project.
1. All swales are located within the drainage easements as shown on the construction plans.
2. Longitudinal slopes and side-slopes (cross-sections) have been verified. Design criteria requires
longitudinal slopes of 2% min. (on vegetated swales) and side-slopes no steeper than 4:1. If these
criteria are not met, the certification engineer will write a justification and propose mitigation for each
instance or have the issues corrected. If variances to these criteria have previously been approved and
are shown on the construction plans, no justification is needed.
3. As-built spot elevations on channels/swales are shown that correspond to spot elevations
shown on the approved construction plans.
4. All permanent erosion control measures are installed as shown on the approved construction
plans (e.g., drop structures, riprap, TRMs, etc.). (Include pictures and verification of the materials used
as part of this verification.)
5. All pans, curbs, storm pipes or other appurtenances appropriately tie into each other in the
system. (Pictures at tie-in points suggested.)
6. The minimum freeboard is provided for all channels and swales as shown on the approved
construction plans or as identified in the approved drainage study. (Show the freeboard provided on
the cross-sections as on the construction plan set or attached as separate documentation.)
7. The low flow portion of all channels or swales is clear of obstructions. (No landscaping, trees,
shrubs, sod, etc. infringe on the low flow portion of channels or swales.)
Yes
N/A
N/A
N/A
N/A
Yes 4897.50
Yes
N/A
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
1/19 Page 4
III. Storm Pipes (aka storm drains) - FCSCM Ch. 9, Sec. 4.0
A. Storm Drain Pipe Capacity: The as-built capacity of all pipes installed on this project has been
verified and meets or exceeds the capacity requirements shown in the approved drainage study for this
project.
1. All storm drain pipe sizes and materials have been verified and are in conformance with the
approved construction plans. (Indicate on the plan and profile sheets that they have been verified.)
Material and size substitutions must be approved prior to installation. If a pipe size or material was
changed during construction, the certification engineer must attach the approval documents or supply
them with this certification. Approval documents must include a calculation documenting the capacity
equivalency (equal or greater) of the substituted size.
2. The longitudinal slope of the pipe is as shown on the approved construction plans. The
acceptable minimum slope is 0.4%. All slopes flatter than the designed slope on the construction plans
must be justified with capacity calculations on an attached sheet.
3. The as-built invert elevations have been verified and are shown on the plan and profile sheets of
the approved construction plans.
B. Storm Drain Pipe Installation Requirements: All pipes are installed in accordance with the
approved construction plans and construction specifications.
1. The minimum cover requirements for all pipes have been met as shown on the approved
construction plans. These will be called out in critical locations.
2. All encasements and clearances as specified on the approved construction plans have been met.
3. Any specific joint types or construction methods specified on the approved construction plans
have been met. (List on a separate sheet and attach to this certification.)
IV. Concrete Pans - FCSCM Ch. 8, Sec. 2.0
A. Construction/Installation: All concrete pans have been constructed in accordance with the
approved construction plans.
1. The concrete pans are the correct size/width as shown on the approved construction plans.
2. The longitudinal slopes of the pans are as shown on the approved construction plans. The
certification engineer must justify or mitigate longitudinal slopes less than the minimum of 0.4% unless
a flatter slope was approved and is shown on the approved construction plans. Provide mitigation or
justification by separate document.
3. The cross-section of the pan is as shown on the construction plans. (Specifically, the pan cross-
section is “V” shaped and meets the side slope shown on the detail.)
4. The concrete pans are a minimum of 6 inches thick without reinforcement and a minimum of 4
inches thick with a minimum of 6X6-W14xW14 reinforcement per detail D20B and D20C. (Provide
documentation of the reinforcement used if different than shown on the details or on the approved
construction plans.)
5. The spot elevations shown on the concrete pan(s) have been verified and are shown on the as-
built drawings.
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Yes
Yes
Yes
Yes
Yes
Yes
1/19 Page 5
V. Storm Drain Inlets - FCSCM Ch. 9, Sec. 3.0
A. Construction/Installation: All storm drain inlets have been constructed in accordance with the
approved construction plans and construction specifications.
1. The size and type of inlets are consistent with the inlets shown on the approved construction
plan. Indicate by writing “Verified” on each inlet on the plan sheet or list on a separate document the
inlet number(s), type and size (length). If the inlet installed is other than the one on the approved
construction plan detail sheet, provide the name and source of the detail with justification for equal or
better capacity.
2. The size of the inlet opening is consistent with the approved detail. (Check height and width.)
3. The elevation of the grate (if applicable) is at the elevation shown on the street profile or as
indicated by a spot elevation on the construction plans.
4. The as-built invert elevations of all pipes entering and leaving the inlet are shown on the plan
and profile sheets within construction tolerance of 0.2 feet. If substantially different, provide
justification and capacity calculations to show the capacity is not affected or propose mitigation.
5. The as-built size of the inlet box is as shown on the construction plans or an explanation or
justification is attached.
6. All Type C, R, 13 and 16 inlet covers are stenciled or stamped with the following designation (or
an equivalent): NO DUMPING – DRAINS TO POUDRE RIVER.
VI. Culverts - FCSCM Ch. 9, Sec. 4.0
A. Construction/Installation: All culverts have been constructed and/or installed in accordance with
the approved construction plans and construction specifications.
1. All culvert sizes have been verified as indicated on the as-built construction plans as correct.
2. The culvert material type for all culverts installed is as on the approved construction plans and is
indicated on the as-built plans.
3. The as-built invert “in and out” elevations have been verified and are indicated on the as-built
construction plans.
4. The culvert headwalls or wing walls have been installed as shown on the approved construction
plans. Headwalls or wing walls may be needed in the as-built conditions onsite if the slopes adjacent to
the culvert are greater than 4:1. Please note areas needing stabilization in the certification narrative.
An alternative to consider is a turf reinforcement mat (TRM).
VII. Sub-Drains
A. Construction/Installation: All sub-drains shown on the construction plans have been installed in
accordance with those plans and the construction specifications. Sub-drains installed with the sanitary
sewer are to be verified on the sanitary sewer plan and profile sheets of the construction plans. (NOTE:
Indicate any sub-drains installed after the plans were approved on the as-built plans.)
1. The size of the sub-drains are as approved on the construction plans and are indicated on the as-
built plans.
2. The type of sub-drain, in particular the perforated and non-perforated sections of the drain, are
as indicated on the approved construction plans.
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
1/19 Page 6
3. The cover requirements per the construction plans are provided.
4. The cleanouts have been installed at the locations shown on the construction plans and are
accessible for cleaning. (Cleanouts can be buried a maximum of 6 inches deep with their locations
marked.)
5. The backfill materials for sub-drains are as shown on the approved construction plans. (This
includes the type, depth and width.)
6. The geo-textile liner completely wraps the sub-drain and the permeable backfill material unless
shown otherwise on the approved construction plans. (Sub-drain pipe wrapped in a sock filter material
is accepted only if approved prior to installation.)
VIII. Curb Cuts
A. Construction: All curb cut openings are constructed in accordance with the approved construction
plans and construction specifications.
1. The size (width) of the curb cut opening is as shown on the approved construction plans.
2. The curb cut openings tie into a downstream swale, pipe, or other appurtenances with a smooth
transition and there no obstructions such as riprap or sod impeding the flow downstream of the curb
cut.
IX. Sidewalk Culverts & Chases
A. Construction/Installation: All sidewalk culverts have been installed at the locations shown on the
approved construction plans.
1. The size (width and length) of the culverts are as shown on the approved construction plans.
2. The cover plate is a minimum 5/8-inch galvanized plate bolted to a galvanized angle iron per the
detail shown on the approved construction plans or per the City’s detail.
3. The sidewalk culvert invert “in and out” elevations have been verified and are indicated on the
as-built plans.
4. The sidewalk culvert opening is as shown on the approved construction plans or per the City’s
detail.
5. There is a smooth transition both on the inlet and outlet ends of the sidewalk culvert with no
obstructions such as riprap or sod impeding the flow into or out of the sidewalk culvert.
X. Site Grading - FCSCM Ch. 8
A. Construction: All common open spaces have been graded in accordance with the approved
construction plans.
1. The grading on all common open spaces bordering private lots has been verified as correct and
the as-built rear lot corner elevations have been shown on the as-built plans.
N/A
N/A
N/A
N/A
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
1/19 Page 7
2. The as-built contours for “overlot grading” are shown on the as-built construction plans for all
common open spaces, tracts, outlots, etc. If not in compliance, please attach a narrative describing the
situation for noncompliance and when it may be corrected. An escrow for overlot grading may be
required. (NOTE: Residential Lot Grading Certification is a separate process from this Overall Site
Certification. It is understood that residential lots will be brought to final grade once the foundation is
backfilled so they may be lower than the plan shows at this Overall Site Certification stage.)
3. All turf reinforcement mats (TRMs) have been installed as shown on the approved construction
plans and the slopes are stabilized.
XI. Permanent Erosion Control BMPs - FCSCM Ch. 9, Sec. 7.0
A. Construction: All permanent erosion control BMPs have been installed per the approved
construction plans.
1. All riprap has been installed in the locations and sizes indicated on the approved construction
plans.
2. All fabric has been installed in the locations and sizes indicated on the approved construction
plans.
a. All fabric was installed per the details on the approved construction plans.
XII. Post-Construction Site Cleanup - FCSCM Ch. 3, Sec. 2.0
A. Construction: All construction debris and obstructions of any kind have been removed from
drainage paths.
1. All construction debris has been removed except in staging area(s).
2. All ruts have been smoothed out in all construction areas.
3. All areas needing reseeding have been identified and future stabilization goals have been
coordinated with the Erosion Control Inspector and in accordance with FCSCM Vol.2 Chapter 12. Note
the area needing stabilization in the narrative.
XIII. Certification of LID and Water Quality Facilities - FCSCM Ch. 7
A. Attached are the During Construction Inspection Checklist for Low Impact Development (LID) and
other items to be verified during construction, along with pictures and other required documentation.
XIV. Certification of Other Permanent BMPs
A. The construction of other permanent BMPs not specifically addressed in this certification is in
accordance with the approved plan. This may include grade control structures, rundowns, bridges, stream
access/improvements, etc.
Please specify other permanent BMPs included on this site:
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
N/A
//1 Page 1
CERTIFICATION OF LOT GRADING
Pursuant to Fort Collins City Code § 26-544 & City Land Use Code § 3.3.2 (e)
Date:
Address:
Lot: Block:
Subdivision:
Permit Application #:
Larimer County Parcel #:
Larimer County Reception #:
(on development agreement)
I, (print) , a Colorado registered professional engineer, verify that construction
of all stormwater facilities and grading is complete and hereby submit this certification.
Please answer the following questions by initialing the appropriate response. For each question initialed “No,” attach an
explanation detailing how this will affect stormwater drainage for this lot and any adjacent lots.
1. Certification includes attached Stormwater-approved grading plan. (NOTE: City’s
Building Department does not approve grading plans).
2. Certification includes the attached as-built survey dated (must be within 60
days of the date the certification is submitted) accurately and truthfully depicting
elevations for:
z Top of foundation/finished floor
z Finished grade on each side of the structure
z Quarter points along each lot line (not more than 50 feet apart)
z Break points/high points
z Swales
z Berms
z Retaining walls
z Air conditioning pads
z Window wells
z Any other appurtenance(s) within an easement
ϯ͘All elevations are within a 0.2 foot tolerance of the approved grading plan.
ϰ͘The top of foundation is at least 6 inches above the highest grade surrounding the
structure.
ϱ͘There is a minimum grade of 5% away from the structure within the first 5 to 10 feet
adjacent to the residence.
ϲ͘All slopes meet or exceed the minimum requirement of 2% (1% is acceptable on single
family lots when the swale is draining the runoff from only two adjoining properties)
and are not steeper than ϯϯ% (ϯ:1).
ϳ͘All flow lines of stormwater drainage swales are a minimum of 6 inches below the
elevation of ground adjacent to the structure and will direct drainage as shown on the
Stormwater-approved grading plan.
ϴ͘All downspout locations and discharge directions are shown on the as-built survey.
Runoff is directed into an appropriate drainage system or lot line swale, and it is not
directed onto neighboring properties.
No Yes
No Yes
No Yes
No Yes
No Yes
No Yes
No Yes
No Yes
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MRB
MRB
MRB
MRB
MRB
MRB
MRB
February 25, 2020 Prospect Industrial Park
2590 Midpoint Drive B1607516
Fort Collins, CO 8720206018
18 20170014544
Michael R. Beach
8/23/2019
//1 Page 2
9. A smooth transition with no vertical offset (step) in grade is provided at the lot line to all
adjacent properties.
10. The grading of this lot does not adversely affect neighboring properties or City
infrastructure.
11. Landscaping has been completed prior to survey. If not, please indicate who will be
responsible for completing landscaping:
12. Final site cleanup has been completed.
13. I personally visited the site as part of the certification process, and in my professional
opinion, the as-built survey is an accurate representation of the site conditions..
No Yes
No Yes
No Yes
No Yes
No Yes
14. Based on this information, I certify that (check one):
Ƒ The elevations and drainage patterns of the lot/site are in substantial conformance with the City
approved drainage and grading plan for the property (information attached).
Ƒ The elevations and drainage patterns of the lot/site as measured are in general conformance with the
City approved drainage plan with exceptions (information attached). In my professional judgment the
elevations and grading of the lot/site as constructed are functionally adequate and equivalent to the
specifically approved drainage plan, and will affect stormwater drainage on and off the lot/site in a
manner consistent with the approved drainage plan.
Name:
Email:
Phone:
Company:
Address:
NOTE: A complete certification must be submitted at least two weeks prior to a request for a Certificate of Occupancy
for the lot/site, including, but not limited to, drawings of the lot/site showing the approved design and as-built surveyed
elevations of all structures, drainage and grading features, written information/explanation of discrepancies, and other
information necessary to confirm the above certification to:
Email (preferred)
WaterUtilitiesEng@fcgov.com
Mailing Address
Fort Collins Utilities
ATTN: Water Utilities Engineering
281 North College Avenue
Fort Collins, CO 80521
Questions?
970-221-6700
PE Stamp
Sign and date
MRB
MRB
MRB
MRB
MRB
✔
Michael R. Beach
mbeach@ridgetopeng.com
970-663-4552
Ridgetop Engineering
541 E. Garden Drive
Windsor, CO 80550
PROPOSED DETENTION POND - STAGE/STORAGE
Pond: 1 (AS-BUILT RECORDS)
Location: Lot 18
Calculated By: MRB
Date: 3/5/2020
V = 1/3 d (A + B + sqrt(A*B))
V = Volume between Contours, ft^2
d = Depth between Contours, ft
A = Surface Area of Contour, ft^2
96 0
96.5 254 0.001 0.001
97 522 0.004 0.005
WQCV = 97.5 768 0.007 0.013 0.000
98 1026 0.010 0.023 0.010
99 1563 0.030 0.052 0.040
100‐Year WSEL = 100 2228 0.043 0.096 0.083
Required Detention Volume = 0.076 See "Detention Volume Calculations"
Provided Detention = 0.083
Required WQCV = 0.005 See "WQCV" RG Calc Sheet
Provided WQCV = 0.013
Total Required Volume = 0.081
Total Volume Provided = 0.096
Stage
(ft)
Surface
Area
(ft^2)
Incremental
Storage
(ac‐ft)
Total
Storage
(ac‐ft)
Detention
Storage (ac‐
ft)
PROPOSED DETENTION POND - STAGE/STORAGE
Pond: 2 (AS-BUILT RECORDS)
Location: Lot 18
Calculated By: MRB
Date: 3/5/2020
V = 1/3 d (A + B + sqrt(A*B))
V = Volume between Contours, ft^2
d = Depth between Contours, ft
A = Surface Area of Contour, ft^2
96.5 0
96.66 230 0.0003 0.0003
97 316 0.0021 0.0024
WQCV = 97.66 675 0.007 0.010
98 1132 0.007 0.017 0.007
100‐Year WSEL = 99.3 5971 0.097 0.113 0.103
Required Detention Volume = 0.087 See "Detention Volume Calculations"
Provided Detention = 0.103
Required WQCV = 0.008 See "WQCV" RG Calc Sheet
Provided WQCV = 0.010
Total Required Volume = 0.095
Total Volume Provided = 0.113
Stage
(ft)
Surface
Area
(ft^2)
Incremental
Storage
(ac‐ft)
Total
Storage
(ac‐ft)
Detention
Storage (ac‐
ft)
March 18, 2020
Dan Mogen
Development Review Engineer
City of Fort Collins
700 Wood Street
PO Box 580
Fort Collins, CO 80522
RE: 2590 Midpoint Drive, PDP160010
Stormwater Pond Completion
Mr. Mogen:
This letter is to confirm the storm drainage ponds for the above referenced project are substantially
complete. Based on a site visit by myself as well as follow up pictures provided by Elder
Construction today, the two outlet structures, orifice plates, bottom pond areas, scour stop, rip‐rap
pad, and side slopes have been constructed according to design plans.
Please contact me at (970) 663‐4552 if you have any questions or concerns regarding this letter.
Sincerely,
Mike Beach, P.E.
Managing Owner
MI
D
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LOT 18
BUILDING
9,047 SF
FFE = 4901
MI
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D
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E
LOT 18
1.0'
W
I
D
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BLO
C
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W
A
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L
1.0'
W
I
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C
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W
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ST
ST
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160.5'
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Of
PROJECT TITLE
REVISIONS
SHEET TITLE
SHEET INFORMATION
DATE
SEAL
DATE
PREPARED FOR
R TIDGEOPENGINEERING & CONSULTING
5255 Ronald Reagan Blvd.,
Ste. 210
Johnstown, CO 80534
T (303) 322-6480
W ridgetopeng.com
DRAWN BY:
CHECKED BY:
PROJECT NO.:
R4 ARCHITECTS
LOT 18,
PROSPECT
INDUSTRIAL
PARK
226 REMINGTON, UNIT 3
FORT COLLINS, CO
2590 MIDPOINT DR
FORT COLLINS, CO
16015002
MRB
BSA
11
SUBMITTAL
FINAL DEVELOPMENT
PLAN
7/27/2016
CITY COMMENTS 09/02/2016
CITY COMMENTS 02/27/2017
CONSTRUCTION
CHANGES 04/28/2017
MINOR AMENDMENT 05/10/2017
GRADING PLAN
C-2.0
6
GRADING NOTESLEGEND
RFI-003 05/24/2017
MIN. AMEND. COMMENT 06/01/2017
POND CURB INSTALL.10/26/2017
ASBUILT 03/18/2020
1/19 Page 1 of 2
DURING CONSTRUCTION INSPECTION CHECKLIST
To be completed by Construction Superintendent
This checklist is to be completed during construction and included with the Overall Site and Drainage Certification.
• Use “Yes” for items completed as described.
• Use “N/A” for items that are not applicable to the site being certified.
• If any blanks are “No,” attach an explanation referencing the item number below.
Project Name: Merit Office Building Date: 9/15/17
Building Permit Numbers: B1607516
I. Compaction
A. Yes All berms and embankments meet the compaction requirements as specified in the project geotechnical report or comply with the
City’s standard, which is “soils should be compacted within a moisture content range of 2% below to 2% above optimum moisture content
and compacted to 95% of the Maximum Standard Proctor Density (ASTM D698).” Compaction requires verification during construction.
Provide testing log from contractor/engineer.
II. Storm Drain Pipe Installation Requirements
A. Yes The pipe trenches have been compacted in accordance with Section 02225-3.07.A.1. of the Fort Collins Development Construction
Standards for Water, Wastewater, Stormwater (e.g., the trenches in the roadways are to be 95% of maximum density and all other areas
are to be at 90%, both in accordance with ASTM D698).
III. Energy Dissipation and Erosion Protection - FCSCM Chapter 9, Section 7.0
A. Riprap
1. Yes The riprap bedding is a granular bedding of the gradation and thickness indicated on the approved construction plans.
2. Yes A filter fabric was installed instead of granular bedding and is the material shown on the approved construction plans or was an
approved equal. Provide documentation for an approved equal.
3. Yes The riprap is the gradation shown on the approved construction plans with a D50 of 6”.
4. Yes The riprap thickness is as shown on the approved construction plans and extends to the horizontal limits shown.
5. Yes The riprap is buried to the depth indicated on the approved construction plans. (A minimum of 6 inches of soil is required.)
B. Permanent Erosion Control Fabric - FCSCM Vol.1, Ch.7
1. Yes All fabric was installed per manufacturer’s specifications.
1/19 Page 2 of 2
IV. Other Permanent BMPs
A. N/A All cut-off walls have been installed in accordance with the approved construction plans. (Cut-off walls are required for irrigation ditch
crossings of storm drain pipes.)
V. Extended Detention Basins
A. Yes Installation of this facility was verified via inspection by a City-Stormwater Inspector at the point of installation of the water quality
control box(es). Provide date of inspection and name of inspector: 9/25/17 I do not know the name of the inspector
Included certification sheet(s):
Please check the appropriate box(es) for the Low Impact Development
(LID) facilities found on this site and complete the corresponding
certification sheets.
☐ Permeable Interlocking Concrete Pavers
☒ Bioretention Cells (Rain Gardens)
☐ Sand Filters
☐ Vegetated Buffers
☐ Underground Infiltration
☒ Other LID – For certification of Dry Wells, Tree Filters,
Constructed Wetland Channels & Ponds, etc., contact City Staff
to determine requirements to exhibit the LID facility has been
constructed and functions as intended per the approved
drainage report.
*Please provide photographic documentation of the installation of all
stages of all LID facilities.
**Please contact the City Stormwater Inspector at
stormwaterinspection@fcgov.com to discuss inspection requirements
for each LID facility and request inspections.
***All facilities being certified must be “clean” – free of sediment &
construction debris – prior to certification or acceptance of the facility.
Completed by:
Name: Bob Shonka
Title: Superintendent
Email: bob.shonka@elderconstructioninc.com
Phone: 970-821-5250
Company: Elder Construction Inc.
Address: 7380 Greendale Rd.
Windsor, CO 80550
1/19 Page 1 of 2
Permeable Interlocking Concrete Pavers
Item/Activity Yes No N/A Submittal Requirements Submitted?/Response
Stormwater Inspection
Pre-construction meeting was held with City-Stormwater
Inspector to discuss installation, inspection, checklist, and
protection from sedimentation
☐ ☐ ☒
Record date, inspector name, meeting
location (i.e. DCP, initial erosion control
inspection, etc.)
Sub-surface inspection(s): Installation of this facility was
verified via inspection by a City-Stormwater Inspector at the
point of installation of the outlet, underdrain, geomembrane
layer, and sub-base courses (per design in Final Plan
Documents)
☐ ☐ ☒
Record date(s) of inspection and
inspector’s name
Surface inspection(s): Installation of this facility was verified via
inspection by a City-Stormwater Inspector at the point of
installation of the pavers and joint fill material
☐ ☐ ☒
Record date(s) of inspection and
inspector’s name
Excavation
Heavy equipment did not encroach into the excavated area
(prevents over-compaction) ☐ ☐ ☒
Bottom of cell was “ripped” after excavation ☐ ☐ ☒ Provide photographs before and after
“ripping”
Bottom surface of cell is flat and level ☐ ☐ ☒ Provide photograph
Impermeable Liner
Impermeable liner meets design specifications ☐ ☐ ☒ Provide specifications of delivered
material
Impermeable liner is attached to concrete perimeter wall ☐ ☐ ☒ Provide photograph
Impermeable liner is buried with no exposure ☐ ☐ ☒
Any penetrations of the impermeable liner have been sealed
and checked for water-tightness ☐ ☐ ☒ Provide photograph (if necessary)
Edge Restraint and Concrete Cut-Off Wall
The required edge restraint meets design specifications ☐ ☐ ☒ Provide specification of installation
Concrete cut-off wall meets design specifications for: ☐ ☐ ☒ Provide specification of installation
- Dimensions ☐ ☐ ☒
- Reinforcement ☐ ☐ ☒
- Footings ☐ ☐ ☒
Underdrain System
Underdrain pipe meets design specifications ☐ ☐ ☒ Provide photograph
At least one cleanout is provided per underdrain lateral ☐ ☐ ☒ Provide photograph
1/19 Page 2 of 2
Cleanout pipe is solid (not perforated/slotted) ☐ ☐ ☒ Provide photograph
Cleanout covers are installed and watertight ☐ ☐ ☒ Provide photograph
Verify the underdrain is NOT wrapped in geotextile fabric ☐ ☐ ☒ Provide photograph
Verify there is no orifice plate on the underdrain outfall ☐ ☐ ☒ Provide photograph
Underdrain integrity tested after backfilling using TV and/or
water test ☐ ☐ ☒ Provide documentation of test results
Aggregate
Sub-base Course(e.g., #2/4):
- Has 90% fractured faces
- Is thoroughly washed (virtually free of fine sediment)
- Is installed to the required design depth
☐ ☐ ☒
Provide load ticket, photographs, and
record depth installed
Basecourse (e.g., #57):
- Has 90% fractured faces
- Is thoroughly washed (virtually free of fine sediment)
- Is installed to the required design depth
☐ ☐ ☒
Provide load ticket, photographs, and
record depth installed
Leveling Course / Joint Fill (e.g., crushed #89):
- Has 90% fractured faces
- Is thoroughly washed (virtually free of fine sediment)
- Is dry screened
- Is installed to the required design depth and to the top
of the paver joints
☐ ☐ ☒
Provide load ticket, photographs, and
record depth installed
Aggregate materials are installed and compacted according to
manufacturer’s and/or design specifications ☐ ☐ ☒ Provide photographs and documentation
of compaction
Protection During Construction
PICP area is protected from construction site sediment,
including runoff from the upstream catchment and
construction equipment traffic ☐ ☐ ☒
Specify how the area was covered and/or
otherwise protected to prevent
construction runoff from entering the
pavement
Close Out
Cracked/broken paver units have been removed and replaced ☐ ☐ ☒
Paver height offsets are no more than 1/4” between adjacent
units & surface contains no deformations
(depressions/settlement) exceeding 1/2"
☐ ☐ ☒
Upstream catchment is stabilized prior to diverting runoff into
PICP system ☐ ☐ ☒
1/19 Page 1 of 3
Bioretention Cells (Rain Gardens)
Item/Activity Yes No N/A Submittal Requirements Submitted?/Response
Stormwater Inspection
Pre-construction meeting was held with City-Stormwater
Inspector to discuss installation, inspection, checklist, and
protection from sedimentation
☒ ☐ ☐
Record date, inspector name, meeting
location (i.e. DCP, initial erosion control
inspection, etc.)
City offices
Underdrain and basecourse inspection(s): Installation of this
facility was verified via inspection by a City-Stormwater
Inspector at the point of installation of the outlet, underdrain,
geomembrane layer, and base course (per design in Final Plan
Documents)
☒ ☐ ☐
Record date(s) of inspection and
inspector’s name
Unknown Inspector
Pea gravel and BSM inspection(s): Installation of this facility
was verified via inspection by a City-Stormwater Inspector at
the point of installation of the pea gravel and bioretention
sand media
☒ ☐ ☐
Record date(s) of inspection and
inspector’s name
Unknown Inspector
Excavation
Heavy equipment did not encroach into the excavated area
(prevents over-compaction) ☒ ☐ ☐
Bottom of cell was “ripped” after excavation ☐ ☒ ☐ Provide photographs before and after
“ripping”
Bottom surface of cell is flat and level ☒ ☐ ☐ Provide photograph
Excavated area is protected/surrounded by sediment/runoff
control measures during construction ☒ ☐ ☐ Provide photograph
Intake
Upstream catchment drains to inlet/bioretention cell per plan
and flows are fully captured ☒ ☐ ☐
Forebay
Forebay is installed according to design specifications ☐ ☐ ☒ Provide photograph
There is a minimum 3” drop at the forebay entrance ☐ ☐ ☒ Provide photograph
Forebay will drain fully and not hold standing water ☐ ☐ ☒
Outlet Structure/Overflow
Emergency overflow elevation is confirmed
☒ ☐ ☐
Measure and record distance from
overflow to top of media filter; provide
photograph
Overflow inlet elevation is set above bioretention media per
plan ☒ ☐ ☐ Provide photograph
1/19 Page 2 of 3
Overflow inlet invert elevation is at least 3 inches below
containment wall/berm (to direct overflow into inlet) ☒ ☐ ☐
Measure and record distance between
inlet and top of containment wall/berm;
provide photograph
Overflow path and check dams, if used, are armored to protect
from erosion and maintain elevations ☒ ☐ ☐ Provide photograph
Impermeable Liner
Impermeable liner meets design specifications ☐ ☐ ☒ Provide specifications of delivered
material
Impermeable liner is appropriately anchored ☐ ☐ ☒ Provide photograph
Impermeable liner is buried with no exposure ☐ ☐ ☒
Any penetrations of the impermeable liner have been sealed
and checked for water-tightness ☐ ☐ ☒ Provide photograph (if necessary)
Underdrain System
Underdrain pipe meets design specifications ☒ ☐ ☐ Provide photograph
At least one cleanout is provided per underdrain lateral ☒ ☐ ☐ Provide photograph
Cleanout pipe is solid (not perforated/slotted) ☒ ☐ ☐ Provide photograph
Cleanout covers are installed and watertight ☒ ☐ ☐ Provide photograph
Verify the underdrain is NOT wrapped in geotextile fabric ☒ ☐ ☐ Provide photograph
Verify there is no orifice plate on the underdrain outfall ☒ ☐ ☐ Provide photograph
Underdrain integrity tested after backfilling using TV and/or
water test ☒ ☐ ☐ Provide documentation of test results Water Test 4/6/20
Filter Media and Aggregate
Reservoir aggregate layer (ASTM #57 or #67):
- meets design specifications
- is installed to the required design depth
☒ ☐ ☐
Provide load ticket, photographs, and
record depth installed
Diaphragm aggregate layer (“Pea Gravel” with gradation ASTM
#8, #89, or #9):
- meets design specifications
- is installed to the required design depth
☒ ☐ ☐
Provide load ticket, photographs, and
record depth installed
Bioretention Sand Media (BSM) composition:
- meets design specifications
- is installed to the required design depth
☒ ☐ ☐
Provide load ticket, photographs, and
record depth installed
BSM was “machine mixed” by supplier prior to delivery ☒ ☐ ☐ Provide load ticket
BSM is installed flat and level ☒ ☐ ☐ Provide photograph
Other Structural Components
Containment wall/berm is continuous and level ☒ ☐ ☐
Landscaping
1/19 Page 3 of 3
Verify final landscaping is free of sod ☒ ☐ ☐ If sod is used, it must be shown to be
“sand-grown”
Final landscaping (non-floatable mulch) is flat and level ☒ ☐ ☐ Provide photograph
Vegetation is planted according to landscape design
specifications and final landscaping plan ☒ ☐ ☐ Provide photograph
Verify that weed barrier is NOT installed ☒ ☐ ☐
Temporary irrigation installed
☐ ☒ ☐
If N/A, then verify that permanent
irrigation is installed to establish/maintain
vegetation
Close Out
Upstream catchment stabilized prior to diverting runoff into
bioretention cell ☒ ☐ ☐
1/19 Page 1 of 1
Vegetated Buffers
Item/Activity Yes No N/A Submittal Requirements Submitted?/Response
Construction
Buffer area was sectioned off to eliminate site disturbance and
compaction during construction ☐ ☐ ☒ Provide photograph(s)
Level spreader has been installed per plan (if applicable) ☐ ☐ ☒ Provide photograph
Soils in the buffer area have been amended ☐ ☐ ☒ Record soil amendment certification with
Environmental & Regulatory Affairs
Vegetation is planted according to landscape design
specifications and final landscaping plan ☐ ☐ ☒ Provide photograph
1/19 Page 1 of 3
Sand Filters
Item/Activity Yes No N/A Submittal Requirements Submitted?/Response
Stormwater Inspection
Pre-construction meeting was held with City-Stormwater
Inspector to discuss installation, inspection, checklist, and
protection from sedimentation
☐ ☐ ☒
Record date, inspector name, meeting
location (i.e. DCP, initial erosion control
inspection, etc.)
Underdrain and basecourse inspection(s): Installation of this
facility was verified via inspection by a City-Stormwater
Inspector at the point of installation of the outlet, underdrain,
geomembrane layer, and base course (per design in Final Plan
Documents)
☐ ☐ ☒
Record date(s) of inspection and
inspector’s name
Pea gravel and filter media inspection(s): Installation of this
facility was verified via inspection by a City-Stormwater
Inspector at the point of installation of the pea gravel and filter
media
☐ ☐ ☒
Record date(s) of inspection and
inspector’s name
Excavation
Heavy equipment did not encroach into the excavated area
(prevents over-compaction) ☐ ☐ ☒
Bottom of cell was “ripped” after excavation ☐ ☐ ☒ Provide photographs before and after
“ripping”
Bottom surface of cell is flat and level ☐ ☐ ☒ Provide photograph
Excavated area is protected/surrounded by sediment/runoff
control measures during construction ☐ ☐ ☐ Provide photograph
Intake
Upstream catchment drains to inlet/sand filter per plan and
flows are fully captured ☐ ☐ ☒
Forebay (If Applicable)
Forebay is installed according to design specifications ☐ ☐ ☒ Provide photograph
There is a minimum 3” drop at the forebay entrance ☐ ☐ ☒ Provide photograph
Forebay will drain fully and not hold standing water ☐ ☐ ☒
Outlet Structure/Overflow
Overflow inlet elevation is set above sand filter media per plan
(typically 1 to 3 feet) ☐ ☐ ☒ Provide photograph
Overflow inlet invert elevation is at least 3 inches below
containment wall/berm (to direct overflow into inlet) ☐ ☐ ☒
Measure and record distance between
inlet and top of containment wall/berm;
provide photograph
1/19 Page 2 of 3
Overflow path and check dams, if used, are armored to protect
from erosion and maintain elevations ☐ ☐ ☒ Provide photograph
Impermeable Liner (If Applicable)
Impermeable liner meets design specifications ☐ ☐ ☒ Provide specifications of delivered
material
Impermeable liner is appropriately anchored to the perimeter
wall ☐ ☐ ☒ Provide photograph
Impermeable liner is buried with no exposure ☐ ☐ ☒
Any penetrations of the impermeable liner have been sealed
and checked for water-tightness ☐ ☐ ☒ Provide photograph (if necessary)
Underdrain System
Underdrain pipe meets design specifications ☐ ☐ ☒ Provide photograph
At least one cleanout is provided per underdrain lateral ☐ ☐ ☒ Provide photograph
Cleanout pipe is solid (not perforated/slotted) ☐ ☐ ☒ Provide photograph
Cleanout covers are installed and watertight ☐ ☐ ☒ Provide photograph
Verify the underdrain is NOT wrapped in geotextile fabric ☐ ☐ ☒ Provide photograph
Verify there is no orifice plate on the underdrain outfall ☐ ☐ ☒ Provide photograph
Underdrain integrity tested after backfilling using TV and/or
water test ☐ ☐ ☒ Provide documentation of test results
Filter Media
Filter media composition (e.g. ASTM C 33 Sand):
- meets design specifications
- is installed to the required design depth
☐ ☐ ☒
Provide load ticket, photographs, and
record depth installed
Pea gravel layer:
- meets design specifications
- is installed to the required design depth
☐ ☐ ☒
Provide load ticket, photographs, and
record depth installed
Filter Media is installed flat and level ☐ ☐ ☒
Other Structural Components
Containment wall/berm is continuous and level ☐ ☐ ☒
Landscaping
Verify final landscaping is free of sod ☐ ☐ ☒ If sod is used, it must be shown to be
“sand-grown”
Final landscaping (non-floatable mulch) is flat and level ☐ ☐ ☒ Provide photograph
Vegetation is planted according to landscape design
specifications and final landscaping plan ☐ ☐ ☒ Provide photograph
Verify that weed barrier is NOT installed ☐ ☐ ☒
1/19 Page 3 of 3
Temporary irrigation installed
☐ ☐ ☒
If N/A, then verify that permanent
irrigation is installed to establish/maintain
vegetation
Close Out
Upstream catchment stabilized prior to diverting runoff into
sand filter cell ☐ ☐ ☒
1/19 Page 1 of 2
Underground Infiltration
Item/Activity Yes No N/A Submittal Requirements Submitted?/Response
Stormwater Inspection
Manufacturer’s representative pre-construction meeting: A
pre-construction meeting was completed with the
manufacturer’s representative and installers
☐ ☐ ☒
Record date and who was present at the
meeting
Pre-construction meeting was held with City-Stormwater
Inspector to discuss installation, inspection, checklist, and
protection from sedimentation
☐ ☐ ☒
Record date, inspector name, meeting
location (i.e. DCP, initial erosion control
inspection, etc.)
Inspection(s): Installation of this facility was verified via
inspection by a City-Stormwater Inspector at the point at which
the chambers had been laid/prior to backfilling.
Correct fabric placement was confirmed.
☐ ☐ ☒
Record date(s) of inspection and
inspector’s name
Excavation
Heavy equipment did not travel across underground cell area
during excavation (prevents over-compaction) ☐ ☐ ☒
Bottom of cell was “ripped” after excavation ☐ ☐ ☒ Provide photographs before and after
“ripping”
Bottom of cell is flat and level, or graded per approved grading
plans ☐ ☐ ☒ Provide photograph
Non-woven fabric is installed per manufacturer’s specifications
and was not damaged during construction (around system) ☐ ☐ ☒ Provide photograph
Woven fabric is installed per manufacturer’s specifications and
was not damaged during construction (beneath chambers) ☐ ☐ ☒ Provide photograph
Excavated area is protected/surrounded by sediment/runoff
control BMPs during construction ☐ ☐ ☒ Provide photograph
Impermeable Liner
Impermeable liner meets design specifications ☐ ☐ ☒ Provide specifications of delivered
material
Impermeable liner is not exposed ☐ ☐ ☒
Any penetrations of the impermeable liner have been sealed
and checked for water-tightness. ☐ ☐ ☒ Provide photograph (if necessary)
Aggregate
Foundation and embedment materials are installed and
compacted according to design and manufacturer’s
specifications
☐ ☐ ☒
Provide load ticket and photograph(s)
Underdrain System
1/19 Page 2 of 2
Underdrain pipe meets design specifications ☐ ☐ ☒ Provide photograph
At least one cleanout is provided per underdrain lateral ☐ ☐ ☒ Provide photograph
Cleanout pipe is solid (not perforated/slotted) ☐ ☐ ☒ Provide photograph
Cleanout covers are installed and watertight ☐ ☐ ☒ Provide photograph
Verify the underdrain is NOT wrapped in geotextile fabric ☐ ☐ ☒ Provide photograph
Verify there is no orifice plate on the underdrain outfall ☐ ☐ ☒ Provide photograph
Underdrain integrity tested after backfilling using TV and/or
water test ☐ ☐ ☒ Provide documentation of test results
Manifold system
Overflow weir elevation is set at/above water quality storm
elevation ☐ ☐ ☒ Record weir elevation on survey
Maintenance access is provided for each Isolator Row ☐ ☐ ☒
At least one inspection port has been provided for each Isolator
Row (located in middle third of each row) ☐ ☐ ☒
Upstream catchment drains to inlet/intake properly ☐ ☐ ☒
Underground Detention Chambers
All chambers were installed per approved Utility Plans and
manufacturer’s specifications ☐ ☐ ☒ Photograph
Close Out
Upstream catchment is stabilized prior to diverting runoff into
Underground Detention system ☐ ☐ ☒
All Isolator Rows, chambers, and pipes are cleaned and
sediment/debris has been removed ☐ ☐ ☒
11
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Proctor Designation A
Maximum Dry Density (pcf)104.5
Optimum Moisture Content (%)16.5%
Required Moisture Variance OMC +/-2%
Required Percent Compaction 95%
Laboratory Method ASTM D-698
Compliance with
Project Specs
Elev. / Lift
No.
Material
(Proctor)
Percent
Moisture
Dry
Density
Moisture
(Pass /
Fail)
%Comp.
(Pass /
Fail)
92 4/8 1 Elevated Berm - South Pond (Midpoint Rain Garden) - West Side FG A 16.6%99.2 0.1%95%Pass Pass
93 4/8 2 Elevated Berm - South Pond (Midpoint Rain Garden) - East Side FG A 16.4%99.4 -0.1%95%Pass Pass
EARTH ENGINEERING CONSULTANTS, LLC
Approximate Test Location / Notes
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Field Test Results
Merit Office BuildingProject Name:
SUMMARY OF FIELD DENSITY TESTS
Location: Fort Collins, Colorado
Project No:
Date:
1174034
April 2020
0%
10%
20%
30%
Project:Merit Office Building
Fort Collins, Colorado
Project No:1174034
Date March 2017
Proctor Designation
Rock Correction (AASHTO T 224)
Maximum Dry Density (pcf)Optimum Moisture Content
(%)
7.2
Retained
3/4"
O 125.0
O-10 126.9
8.0
130.9 5.6
O-20 128.8 6.4
O-30
90
95
100
105
110
115
120
125
130
135
140
145
0 5 10 15 20 25 30 35
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Percent Moisture
Earth Engineering Consultants, LLC
Summary of Laboratory Classification/ Moisture-Density Relationship
Curves for 100% Saturation
For Specific Gravity Equal to:
2.80
2.70
2.60
Material Designation:
Sample Location:
Description:
A
Building Subgrade
Sandy Lean Clay (CL)
Atterberg Limits (ASTM D-4318)
Liquid Limit:
Plastic Limit:
Plasticity Index:
34
19
15
Passing No. 200 Sieve (AASHTO T 11/ASTM C 117):66.7%
Standard Proctor (ASTM D-698)
Maximum Dry Density:
Optimum Moisture Content:
104.5 pcf
16.5%
Material Designation:A
Sample Location:Building Subgrade
Material Description:Sandy Lean Clay (CL)
Project:Merit Office Building
Fort Collins, Colorado
Project No:
Date March 2017
98%
66.7%
96%
87%
1174034
No. 40
No. 10
No. 200
Sieve Size Percent Passing
No. 4
Earth Engineering Consultants, LLC
Summary of Laboratory Gradation Test
0%
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0.0010.010.1110100
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Grain Size in Millimeters
This unofficial copy was downloaded on Jun-01-2017 from the City of Fort Collins Public Records Website: http://citydocs.fcgov.com
For additional information or an official copy, please contact Engineering Office 281 North College Fort Collins, CO 80521 USA