HomeMy WebLinkAbout057 - 05/02/2017 - ADOPTING THE FORT COLLINS UTILITIES WATER AND WASTEWATER DESIGN CRITERIA MANUAL (2)ORDINANCE NO. 057, 2017
OF THE COUNCIL OF THE CITY OF FORT COLLINS
ADOPTING THE FORT COLLINS UTILITIES
WATER AND WASTEWATER DESIGN CRITERIA MANUAL
WHEREAS, the City owns and operates Fort Collins Utilities, which includes a water
utility and•a wastewater utility; and
WHEREAS, Section 26-29(a) of the City Code states that the Utilities Executive Director
shall promulgate Water Utilities Development Construction Standards, which shall constitute
standard specifications governing the depth, size, slope, alignment, materials or construction of,
among other things, water and wastewater fixtures, lines and other improvements, as well as the
methods to be used in the excavation, placement, joining, testing, trenching and backfilling, and
such other technical specifications as may apply to construction of water and wastewater
infrastructure; and
WHEREAS, Section 26-29(a) of the City Code further states that said specifications shall
be effective upon approval by the City Council by ordinance, will have the same force and effect
as provisions of Chapter 26 of the City Code, and shall be enforceable pursuant to the terms of
Chapter 26 of the City Code and as provided in Section 1-15 of the City Code; and
WHEREAS, Section 26-29(a)-(b) of the City Code states that the Utilities Executive
Director may administratively adopt minor additions, revisions and corrections to the Water
Utilities Development Construction Standards as may, in the judgment of the Utilities Executive
Director, be necessary to better conform to good engineering and/or construction standards and
practice, provided that the Utilities Executive Director shall approve only those proposed
technical revisions that:
1) are consistent with all existing policies relevant to the revisions,
2) do not result in any significant additional cost to persons affected by the revision,
and
3) do not materially alter the standard or level of service to be accomplished through
the specified infrastructure.
and;
WHEREAS, Section 26-29(b) of the City Code further states that, upon adoption of any
technical revisions pursuant to the authority of that subsection, the Utilities Executive Director
shall provide to the City Clerk documentation of such technical revisions specifying the date
upon which they shall become effective, and shall maintain said documentation on file in the
permanent records of the City Clerk and Utility Services and available for public inspection; and
WHEREAS, Section 26-52 of the City Code states that the Utilities Executive Director
may promulgate such rules, regulations, policies and procedures consistent with the provisions of
Article III of Chapter 26 of the City Code as the Utilities Executive Director may deem
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necessary for the proper administration of the water utility and the requirements of Article III of
Chapter 26 of the City Code, including the establishment of standard specifications for
construction of service lines and other technical specifications as provided in Section 26-29 of
the City Code; and
WHEREAS, Section 26-52 of the City Code further states such rules and regulations are
effective upon the approval by the City Council by ordinance and will have the same force and
effect as provisions of Chapter 26 of the City Code, and shall be enforceable pursuant to the
terms of Chapter 26 of the City Code and as provided in Section 1-15 of the City Code, and that
a user's failure to abide by all effective rules, regulations, policies and procedures promulgated
by the Utilities Executive Director is the same as a violation of Article III of Chapter 26 of the
City Code; and
WHEREAS, Fort Collins Utilities has prepared the Fort Collins Utilities Water and
Wastewater Design Criteria Manual ("Manual"), attached hereto as Exhibit"A", pursuant to
Sections 26-29 and 26-52 of the City Code; and
WHEREAS, following outreach to potentially-impacted stakeholders, City staff and the
Water Board recommend that the Manual be adopted by City Council.
NOW, THEREFORE, BE IT ORDAINED BY THE COUNCIL OF THE CITY OF
FORT COLLINS as follows:
Section 1. That the City Council hereby makes and adopts the determinations and
findings contained in the recitals set forth above.
Section 2. That the City Council hereby approves the Manual pursuant to Sections
26-29 and 26-52 of the City Code.
Section 3. That the Utilities Executive Director may administratively adopt minor
additions, revisions and corrections to the water service-related provisions of the Manual
pursuant to Section 26-29(b) of the City Code, or any successor sections.
Introduced, considered favorably on first reading, and ordered published this 18th day of
April, A.D. 2017, and to be presented for final passage on the 2nd day of May, A.D. 2017.
04 for roa
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City Clerk
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Passed and adopted on final reading on the 2nd day of May, A.D. 2017.
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SEAS• : Mayor
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EXHIBIT A
FORT COLLINS UTILITIES
Water and Wastewater Design Criteria Manual
Adopted :
May 2 , 2017
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Fort Collins
Fort Collins Utilities Water and Wastewater Design Criteria Manual
Table of Contents
SECTION 1 - GENERAL PROVISIONS
1 . 01 Intent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1 .02 Revisions and Updated Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1 . 03 Other Related Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1 . 04 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1 . 05 Variances and Appeals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1 .06 Enforcement and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1 . 07 Public Water and Wastewater Extension and Oversizing . . . . . . . . . . . . . . . . . . .5
1 . 08 Easements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SECTION 2 - UTILITY PLAN AND RECORD DRAWING REQUIREMENTS
2 . 01 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 . 02 Utility Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 . 03 Water System Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 . 04 Wastewater System Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2 . 05 Utility Standard Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2 .06 Final Utility Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2 . 07 Record Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
SECTION 3 - WATER DISTRIBUTION DESIGN CRITERIA
3 . 01 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3 . 02 Water/Wastewater Demand Analysis Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3 .03 Water System Modeling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3 . 04 FCU Water Service Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3 . 05 Pressure Zones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3 . 06 Water Distribution System Design and Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
A. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II
B .Hydraulic Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
C . Water Main Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
D . Pipe Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
E.Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
F .Water Main Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
G. Lowerings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
H. Connections to Existing Distribution System. . . . . . . . . . . . . . . . . . . . . . . . 14
1. Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
J. Fire Hydrants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
K. Thrust Restraint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
L.Services . . . . . . . . . . . . 17
M. Meters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
N. Borings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
O. Corrosion Control and Cathodic Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
P . Casing Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Q. Phased Installations and Stub-outs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3 . 07 Separation from Other Utilities and Buildings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3 . 08 Ditch Crossings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3 . 09 Roundabout Crossings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3 . 10 Landscape Separation Distances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3 . 11 Abandonment of Mains and Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
SECTION 4 - WASTEWATER COLLECTION DESIGN CRITERIA
4. 01 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.02 Water/Wastewater Demand Analysis Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4. 03 Wastewater System Modeling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4. 04 FCU Wastewater Service Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4. 05 Wastewater Pump Stations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4. 06 Wastewater Collection System Design and Layout . . . . . . . . . . . . . . . . . . . . . . . . 26
A. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
B .Hydraulic Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
C .Pipe Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
D . Alignment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
E. Sewer Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
F . Groundwater Barriers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
G . Manholes . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " I ' ll . . . . . . . . . . . . . . . . . 28
H.Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
1 . Subdrains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
J. Borings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
K. Casing Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
L.Phased Installations and Stub-outs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.07 Separation from other Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4. 08 Ditch Crossings . , , , . , ' . . " . " . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.09 Roundabout Crossings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4. 10 Landscape Separation Distances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4. 11 Abandonment of Mains and Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
APPENDICES
Appendix A - Utility Plan Checklist
Appendix B - Utility Maps
Water Utility Service Areas
Water Pressure Zones
Wastewater Utility Service Areas
FORT COLLINS UTILITIES WATER AND WASTEWATER DESIGN CRITERIA MANUAL
SECTION 1 — GENERAL PROVISIONS
1 .01 INTENT
A. These Design Criteria, hereinafter referred to as the "Criteria", shall be known as the Fort
Collins Utilities (FCU) Water and Wastewater Design Criteria and shall be the governing
Criteria for the public water distribution and wastewater collection improvements that are
designed and installed in conjunction with the City' s Development Review Process and are
within areas wherein FCU owns and operates such systems.
B . These Criteria, with all future amendments, establish minimum design standards for
providing and maintaining the public water distribution and wastewater collection systems.
Whenever the requirements of these Criteria are found to be inconsistent with any other
adopted standards, regulations or codes, the more restrictive criteria, standards, regulations
or codes shall control.
C. The Design Engineer is responsible for compliance with these Criteria as well as other
applicable design and construction standards in the preparation of engineering and
construction documents for review and acceptance by FCU. The provisions of these Criteria
are minimum requirements that do not preclude the use of more restrictive standards by the
Design Engineer.
D . The design of all public improvements shall be by or under the direction of a Professional
Engineer duly registered and licensed by the State of Colorado.
E. Adherence to these Criteria does not remove the Developer' s responsibility to investigate
and obtain any other regulatory permits or approvals from local, regional, state or federal
agencies that may be required for a particular project.
1 .02 REVISIONS AND UPDATED CRITERIA
The Criteria may be amended as new technology is developed or as a need for revision is
demonstrated and proven through experience and use. FCU will maintain these Criteria and any
amendments thereto and will post these Criteria and amendments on the City' s website. FCU does
not keep a database of holders of these Criteria. It shall be the responsibility of each holder to
verify the most current Criteria are being used for any Development Project.
1 .03 OTHER RELATED STANDARDS
A. Chapter 26 of City Code and these Criteria set forth the minimum standards for designing
public improvements in the FCU water and wastewater service areas .
B . All public water and sanitary sewer improvements shall comply with the FCU Water
Distribution System and Wastewater Collection System Master Plans .
C. All public stormwater improvements shall comply with the Fort Collins Stormwater Criteria
Manual.
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D . Materials and installation of the water, wastewater and stormwater improvements shall
comply with the City of Fort Collins - Water, Wastewater, Stormwater Development
Construction Standards.
E. The Planning Department administers the Fort Collins Land Use Code which defines the
various processes required for development projects within the City.
F . Engineering Development Review administers the Larimer County Urban Area Street
Standards (LCUASS) which set forth standards for certain public improvements within City
R.O .W. and public easements.
1 .04 DEFINITIONS
AASHTO — American Association of State Highway and Transportation Officials.
AWWA — American Water Works Association.
City - City of Fort Collins.
City Code - The latest officially adopted City Code of Fort Collins, Colorado
Contractor - A person, partnership or corporation duly licensed and bonded in the City of Fort
Collins in accordance with the requirements of the City Code.
CP — Cathodic Protection or Cathodically Protected.
Design Engineer - The partnership, corporation or individual who is registered as a Professional
Engineer according to Colorado Statutes, who is hired by the Developer/Owner to conduct
engineering design services and who may be empowered by the Developer/Owner to act as his/her
agent for the project.
Developer or Developer/Owner — This includes the person or persons, public or private, legally
responsible for construction of improvements within a specific development.
DI / DIP — Ductile iron / ductile iron pipe.
Distribution Main — The portion of the water or waste water system that conveys water or
wastewater to or from the transmission mains for use at a neighborhood scale.
Easement — A right granted by the property owner permitting a designated part or interest of the
property to be used by others for specific use or purpose.
FCU — Fort Collins Water, Wastewater and Stormwater Utilities.
FDP (Final Development Plan) — Final plans submitted after the public hearing as outlined in the
City' s Development Review Process.
GPM — Gallons per minute.
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HDPE — High density polyethylene.
Inspector - The authorized representative of the City assigned to make detailed inspections for
contract performances, standards and contract compliance.
LCUASS — Larimer County Urban Area Street Standards.
May - A permissive condition. No requirement for design or application is intended.
MJ — Mechanical joint.
Non-Potable — Water that is not treated to drinking water standards and is not suitable or intended
for human consumption.
Owner — Any person having title or rights of ownership in the surface of real property or
leasehold interest therein.
PDP - Project Development Plan
Professional Engineer — A registered engineer licensed by the State of Colorado with expertise
and qualifications in the areas covering the scope of work.
PSI — Pounds per square inch of pressure.
PVC — Polyvinyl chloride.
Record Drawings - Detailed drawings which have been prepared by a Professional Engineer
registered and licensed by the State of Colorado, upon completion and prior to final acceptance,
and show actual construction and contain field dimensions, elevations, details, changes made to
the Construction Drawings by modification, details which were not included on the Construction
Drawings, and horizontal and vertical locations of underground utilities which have been impacted
by the utility installation. Record Drawings are usually Construction Drawings which have been
modified to contain the information listed above.
R.O.W. or Right-of-Way - A general term denoting land, property, or interest therein, usually in a
strip acquired for or devoted to a street or utility.
Sewer — In these Criteria, sewer shall refer to sanitary sewer.
Shall - A mandatory condition. Where certain requirements in the design or application are
described with the "shall" stipulation, it is mandatory that these requirements be met.
Should - An advisory condition. Where the word "should" is used, it is considered to be advisable
usage, recommended be not mandatory. Deviations may be allowed when reasons are given which
show that the intent of the standard is met.
Street - A general term denoting a public way for purposes of vehicular travel, including the entire
area within the R.O.W. (including alleyways).
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Storm Drain - Any conduit and appurtenance intended for the reception and transfer of
stormwatcr.
Storm Drainage Design Criteria - The current City of Fort Collins Stormwater Criteria Manual.
Transmission Main — Typically, a main larger than 16 inches in diameter used to convey water to
the distribution system or wastewater from the distribution system to the wastewater treatment
plant.
Utility - Utilities Executive Director or his/her authorized representative.
Utility Plans - Details and working drawings including plan, profile and detail sheets of proposed
improvements for development projects approved by the Engineer/Utility.
1 .05 VARIANCES
A. Any design that does not conform to these Criteria must be approved by the Utilities
Executive Director. Variances from these Criteria will be considered administratively on a
case-by-case basis following a written request for a variance prepared by a Professional
Engineer and submitted to the FCU Water Utilities Senior Development Review Engineer.
To assist with plan preparation, designers may submit variance requests, along with
documentation to support the variance, for informal advisory consideration prior to formal
submittal of utility plans. Such advisory consideration shall not be binding on FCU but may
help guide the designer in the preparation of plans.
B . Variances requested as part of the formal submittal of utility plans shall be shown on the
plans and shall also be specifically substantiated and justified in a letter addressed to
Utilities Executive Director. A summary of all approved variances shall be listed in the
general notes on the approved plans.
C .The variance request shall include, at minimum, the following:
1 . Identifyin Issue :ssue : Identification of the standard to be varied and the reason that
the standard is not feasible or not in the public interest.
2 . Proposed Alternate Design: Identification of the proposed alternate design or
construction criteria.
3 . Comparison to FCU Criteria: A thorough description of the variance request
including the impact on capital and maintenance requirements, costs and how
the proposed design compares to the Criteria.
1 . Justification: The Professional Engineer must determine and state that the
variance will not be detrimental to public health, safety and welfare and will not
reduce the design life of the improvement nor cause FCU additional
maintenance costs. The proposed plan must advance the public purpose of the
Criteria sought to be varied equally or better than would compliance with these
Criteria.
D. Approval or Denial of Variance: Based upon review of the utility plans and additional
information submitted and an analysis of the process set forth in this Subsection 1 .05 C . , the
Utilities Executive Director may approve or deny the variance request. If the request is
approved, the plans will continue to be reviewed and approved within the typical review
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process. If the request is denied, the Developer shall subsequently submit revised plans in
compliance with these Criteria. A written response outlining the basis for all approvals or
denials of variance requests will be provided by the FCU Water Utilities Senior Development
Review Engineer.
1 .06 ENFORCEMENT AND INSPECTION
A. These Criteria are enforceable by the City at any point in the City' s Development Review
Process, including installation and inspection of the public improvements.
B .Inspection services during construction are provided by the City' s Engineering Department.
1 .07 PUBLIC WATER AND WASTEWATER EXTENSION AND OVERSIZING
A. As indicated in City Code Section 26-369 (d), Developer shall install water mains and sanitary
sewers to the farthest point or points of the property to be served when in the opinion of the
Utilities Executive Director such extension is desirable to provide for future extensions of the
water and wastewater systems.
B.If FCU requires a Developer to install water mains and sanitary sewers for a subdivision or
development of a size or capacity greater than that necessary to serve the new development, if
greater than the minimum size required as outlined in this Manual, the City shall pay the extra
expense caused by the oversizing as outlined in City Code Section 26-371 .
1 .08 EASEMENTS
A. All City-owned public utilities including water and wastewater facilities shall be located in
public R.O.W. or public utility easement.
B .Minimum easement widths are listed in the table below. In certain limited situations when a
sanitary sewer is less than 10 feet deep, the sanitary sewer easement width may be reduced
to 20 feet if approved by FCU. At the discretion of FCU, wider easements may be required
where the depth of a utility or the number of utilities occupying the easement necessitates
additional width to satisfy standards for utility separations, trenching excavations,
maintenance access and safety.
Minimum Easement Requirements for Water Mains and Sanitary Sewers
utility Minimum Easement Width
Water main 20 feet (centered on the main)
Sanitary Sewer 30 feet (centered on the main)
Combined Water and Sewer 35 feet
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SECTION 2 — UTILITY PLAN AND RECORD DRAWING REQUIREMENTS
2 .01 GENERAL
A. Utility plans for public water and wastewater improvements shall be prepared and submitted
in accordance with these Criteria.
B .To assist with preparation of the utility plans, Appendix A includes a checklist outlining the
information required. Refer to the checklist for additional requirements. This checklist is
required to be completely filled out by the Engineer who prepared the Utility Plan and
submitted with the Utility Plan submittal.
C . As a minimum, the utility plan set shall include :
1 . Cover sheet
2 . General and construction notes
3 . Overall utility plan
4. Plan and profile sheets as required
5 . Applicable standard construction details
2.02 UTILITY PLANS
A. Refer to Utility Plan Checklist in Appendix A for Project Development Plan (PDP) and Final
Plan (FP) submittal items.
B . Scale on the plan views shall be 1 inch = 20 feet, 30 feet, 40 feet or 50 feet. These sheets
may also include details and designs for lowerings, crossings or special items to clarify the
intent of the information shown on that particular sheet.
C . Plan and profile sheets are required for all water mains 12-inch and larger and for all sanitary
sewer mains . On minor projects, the water main profile may be omitted if approved by the
FCU Water Utilities Senior Development Review Engineer. A specific profile view or
design detail shall be included for each lowering or crossing as noted in Section 3 .06 G. of
these Criteria.
D. All projects must use benchmarks documented in the current City of Fort Collins Vertical
Control Network. Assumed vertical datums or adjustment equations are not allowed.
E. All construction or sequence phasing shall be clearly noted such that each phase is depicted in
a "stand alone" manner. In some cases, water mains or sanitary sewers may be required to
extend beyond a particular phase to provide acceptable redundancy for water or discharge
points for sewer. In these cases, the plan sheets shall clearly show the applicable phase lines,
design, details, R.O.W. , easements, etc. to accommodate such extensions beyond a particular
phase.
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F . On plan and profile drawings, longitudinal stationing based upon centerline of main shall be
included for all water and sanitary sewer mains and related appurtenances (e.g. service
connections, valves, fittings, fire hydrants, manholes, vaults, blow-offs, air release/vacuum
valves, etc.). Stationing for water mains shall generally read in ascending order in the
direction of the north arrow or from left to right and for sanitary sewers shall be from
downstream to upstream.
G. Horizontal locations for all proposed and existing water mains and sanitary sewers shall be
dimensioned from the centerline of the R.O.W. or easement. In some cases, additional
dimensioning may be required for purposes of clarity and future reference.
H. Existing structures, wet and dry utilities and ground surfaces shall be included on all plan
views (shown as phantom lines and shapes). These existing items shall be dimensioned in a
manner that clearly shows the relationship to the proposed water mains and sanitary sewers .
This shall include but is not limited to :
1 . All water, wastewater, storm drainage, electric, cable television, communications lines
and any related appurtenances .
2 . Drainage and irrigation ditches or swales
3 . Fence lines and gates
4. Bridges and culverts
5 . Curb lines and other roadway features
6. Existing landscape features
7 . Other items required by FCU
2.03 WATER SYSTEM PLANS
A. The following shall be clearly shown and labeled:
1 . Pipe material, diameter, lengths between fittings, valves, fire hydrants and
appurtenances, etc.
2 . All fittings and water main appurtenances
3 . Services with size and curb stop locations
4. Location and size of all water meter pits and vaults
5 . Casings including material, diameter, thickness and length
6. All lowerings and vertical sweeps
7 . Match lines with and sheet numbers
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8 . Phase lines
9 . Hatching or labeling to indicate beginning and end of all portions of the water main
being restrained with restrained lengths clearly shown and labeled
B .Water main profiles shall include the following:
1 . Existing ground profile shown as dashed line
2 . Proposed ground profile shown as solid line
3 . All items required in 2 . 03 A. of these Criteria with longitudinal stationing and design
elevations for each item noted
4. Depths of water main relative to proposed ground profile
5 . All utility crossings (existing and proposed) with longitudinal stationing and
elevations noted
5 . Groundwater barriers based upon groundwater levels
2 .04 WASTEWATER SYSTEM PLANS
A. The following items shall be clearly shown and labeled:
1 . Size, type and class of all portions of sanitary sewer with lengths between manholes
2 . Manholes with diameter, longitudinal stationing and any special features
3 . Service lines with diameter and longitudinal stationing
4. Casings with material, diameter, thickness or class of pipe, longitudinal stationing of
beginning and ending points
5 . Sewer joint encasements and longitudinal stationing
6. Grease interceptors
7 . Sand and oil interceptors
8 . Match lines with longitudinal stationing and sheet numbers
9 . Phase lines with longitudinal stationing
B . Profiles are required for all sanitary sewers and shall include the following :
1 . Existing ground profile shown as dashed line
2 . Proposed ground profile shown as solid line
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3 . All items required in 2 . 04 A. of these criteria with the design elevations of each item
noted
4. All manhole rim and inflow/outflow invert elevations
5 . All utility crossings (existing and proposed) with elevations noted
6. Pipe joint encasements with type of encasement and longitudinal stationing noted
7 . Groundwater barriers based upon groundwater levels
2.05 UTILITY STANDARD DETAILS
A. A copy of each applicable Standard Construction Detail Drawing shall be included on the
Utility Plan detail sheet. All Standard Construction Details shall be shown as originally
prepared by FCU and shall not be altered without first obtaining written approval from the
FCU Water Utilities Senior Development Review Engineer.
1 . If alteration is approved by FCU, the Standard Construction Drawing must clearly
show "Revised — Project Name" in bold letters near the title block of the drawing.
B . All other non-standard details (e.g. lowerings, special construction items, crossings, etc.)
shall be included on the appropriate plan or plan and profile sheet.
C .Lists of the Standard Construction Detail Drawings are included in the City of Fort Collins
Water, Wastewater, Stormwater Development Construction Standards.
2.06 FINAL UTILITY PLANS
A. An electronic version, in a format acceptable to the City, of the final utility plans shall be
provided to FCU at the time that the final Mylar plans are submitted. The electronic plans
shall include all approval signatures and Design Engineer' s seal and signature.
2.07 RECORD DRAWINGS
A. Utility plans shall be updated per the currently approved Water, Wastewater, Stormwater
Development Construction Standards with all design and construction changes that occurred
after plan approval.
B . Record drawings shall be prepared with a cooperative effort of a Professional Engineer and
the Contractor as follows :
1 . Document dimensions, grades/slopes, lengths, elevations and details that in the
opinion of FCU or the Engineering Department Inspector were substantially different
from the approved utility plans.
2 . Include horizontal and vertical locations of underground utilities not shown on the
original approved utility plans .
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3 . Drawings are prepared in a manner that shows changes legibly and denotes the change
by clouding or similar means to clarify the change or revision that was made.
4. Drawings are clearly labeled RECORD DRAWING in bold font and be signed and
sealed by the Professional Engineer.
5 . Submit one copy as blue or black-line sheets to the Engineering Department Inspector
for review. Once approved by the Engineering Department Inspector, submit six (6)
sets of paper copies and one ( 1 ) set of reproducible double matte mylars all in a 24-
inch x 36-inch format.
C . Following approval of the Record Drawings, the Professional Engineer completing the
Record Drawings shall provide the following to FCU in AutoCAD version 2007 or newer:
Horizontal coordinates, elevations, utility linework and other pertinent information for the
purposes of FCU revising and maintaining the utility mapping system.
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SECTION 3 — WATER DISTRIBUTION DESIGN CRITERIA
3 .01 GENERAL
These Criteria typically apply to potable water distribution mains 16-inch diameter and smaller.
Larger mains are considered transmission mains. If a development project includes any
construction of or modification to a transmission main, contact the FCU Water Utilities Senior
Development Review Engineer and the FCU Water Engineering Capital Projects Division for
design and construction requirements .
3.02 WATER/WASTEWATER DEMAND ANALYSIS REPORT
In conjunction with the City' s Development Review Process, FCU may require that the Design
Engineer submit a Water/Wastewater Demand Analysis Report at the time of PDP . If the analysis
report is required, a meeting with FCU Water Utilities Senior Development Review Engineer must
be held to determine the outline and scope of the report.
3.03 WATER SYSTEM MODELING
If, during the development review process, FCU determines that a dynamic analysis is needed for
proper sizing of water mains, FCU will assist with the necessary modeling to evaluate the
proposed project and associated demands with detailed information provided by the Design
Engineer.
3 .04 FCU WATER SERVICE AREA
A. FCU provides water service to a portion of the area inside City limits and other areas to the
northwest of the City including parts of the community of Laporte, Colorado. (See Water
Utility Service Areas Map in Appendix B for a map current as of the date of the adoption of
this manual.)
B .Other portions of Fort Collins receive water service from the following water districts :
East Larimer County Water District (ELCO)
232 S Link Lane
Fort Collins, CO 80524
Telephone : 970-493 -2044
Fort Collins-Loveland Water District
5150 Snead Drive
Fort Collins, CO 80525
Telephone : 970-226-3104
Northern Colorado Water Association
4389 E Co Rd 70
Wellington, CO 80549
Telephone : 970-568-3975
Sunset Water District
Telephone : 970-491 -3237
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West Fort Collins Water District
2711 N Overland Trail
Laporte, CO 80535
Telephone : 970-484-4881
C . When designing water main extensions, it is important to avoid designing/constructing
mains which would interconnect with these various utilities .
3.05 PRESSURE ZONES
Within the FCU water service area, there are two pressure zones . The Foothills Pressure Zone is
located in the western part of the city and extends northwest to the Laporte, Colorado area. The
Main Pressure Zone covers the remainder of the Fort Collins Utility' s water service area. (See
Water Pressure Zones Map in Appendix B) It is important to avoid interconnecting water mains
serving the two distinctly separate pressure zones.
3.06 WATER DISTRIBUTION SYSTEM DESIGN AND LAYOUT
A. General
1 . Each development shall have redundant sources of water supply to provide a
combination of adequate fire flow, uninterrupted customer service and acceptable
water quality. Redundancy is typically achieved by making at least two separate and
distinct connections to the existing Public Water System. Based upon the magnitude
and water demands of a proposed development project, FCU may require a greater
number of connections .
2 . All distribution mains shall be looped into the existing and proposed distribution
system to ensure at least two feed sources and to maintain system reliability except
where allowed as follows . Permanent dead end mains are discouraged and should be
avoided when practical. The most common exceptions are cul-de-sacs. If a dead end
main is approved by FCU (temporary or permanent), there must be a fire hydrant at
the end for flushing. Where allowed, the length of permanent dead ends shall be
limited to a maximum of 660 feet.
3 . Additionally, it is critically important within each development that the site layout be
designed in a manner that accommodates acceptable access for maintenance and
replacement of the system by FCU, including adequately designed all-weather access
for mains installed outside of a public roadway. The Design Engineer shall make
adequate provisions for utility separation requirements and easements outlined in these
Criteria.
B. Hydraulic Parameters
1 . Pressure — The distribution system shall be designed to provide a minimum pressure of
40 psi under maximum hour demand flow and a residual pressure of 20 psi at ground
surface elevation under maximum demand condition plus fire flow required by Poudre
Fire Authority.
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2 . Velocity — All water mains (with the exception of fire hydrant laterals) shall be
designed for a maximum velocity of 10 feet per second at peak hour demand plus
design fire flow.
C. Water Main Size
1 . Allowable Distribution Main Sizes : 6, 8, 12 and 16-inch diameters . Minimum size is
typically 8-inch with the exception of short cul-de-sacs and fire hydrant laterals.
2 . Section Lines and Quarter Section Lines: Minimum size is 12-inch unless a larger
main is included in the Distribution System Master Plan.
3 . All public water main sizes shall comply with the FCU Water Distribution System
Master Plans.
4. Plan and profile drawings are required in the utility plans for all water mains 12-inch
and larger. On minor projects, the water main profile may be omitted if approved by
the FCU Water Utilities Senior Development Review Engineer.
D. Pipe Material
1 . Water mains up to and including 12-inch in diameter shall be cement-mortar lined
ductile iron pipe (DIP) in accordance with AWWA C151 or polyvinyl chloride (PVC)
pipe in accordance with AWWA C900.
2 . Water mains 16-inch and larger shall be cement-mortar lined ductile iron pipe (DIP) in
accordance with AWWA C151 or polyvinyl chloride (PVC) pipe in accordance with
AWWA C905 .
3 . All ductile iron pipe (DIP) shall be installed with polywrap in accordance with
AWWA C105 .
4. All polyvinyl chloride (PVC) pipe shall be installed with tracer wire.
E. Alignment
1 . Within platted streets, sanitary sewers are typically on the centerline of the street and
water mains are a minimum of 10 feet from the sewer. In addition, the water main
shall be a minimum of 5 feet from the face of curb.
2 . Straight ngment - In general, water mains shall be laid with straight alignments
with manufactured, ductile iron, mechanical joint bends.
3 . Curved Alignment — If allowed, water mains installed in curved portions of street
R.O .W. s or easements may be designed utilizing pipe joint deflection.
a. DIP — Pipe joint deflection for DIP shall not exceed 80% of the manufacturer' s
recommended allowable joint deflection.
b. PVC — Pipe joint deflection for PVC pipe shall not exceed I degree per section
of pipe. Bending of the pipe is not allowed.
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F.Water Main Depth
Normal depth of cover for all distribution mains is a minimum 4. 5 feet to a maximum of 5 . 5
feet measured from finished grade to top of water main. Depths of cover outside of this
range require approval from the FCU Senior Water Development Review Engineer with
input from Water Field Operations staff. If less than 4. 5 feet of cover is allowed, the Design
Engineer must design the thickness and extent of the insulation to be provided to mitigate the
shallower depth of cover and include a detail showing the placement and dimensions of the
insulation and the specifications for the insulation which is suitable for underground
applications .
G. Lowerings
1 . In cases where the normal water main depth results in a conflict with other utilities, the
water main shall be lowered to mitigate the conflict. Combination air release / vacuum
valves shall be required at high points that are created by the lowering of 12-inch and
larger water mains and may be required on smaller mains at the discretion of FCU.
2 . When the lowering is crossing below another pipeline 18-inch or larger, a bank of
multiple pipelines or a box culvert, the water main shall be installed in a casing. Refer
to Section 3 .06 P. of these Criteria for details regarding the casing materials.
a. Casing shall extend a minimum of 10 feet beyond each side of the pipeline or
other utility above.
b . 18" of vertical separation is required between the top of the casing pipe and the
bottom of the other utility.
C. Water main shall be restrained through the casing utilizing restrained joint pipe
or approved joint restraint devices . The use of tie-rods is not allowed.
d. Isolation valves are required at both ends of these lowerings 40 feet back from
the end of the casing and shall be restrained in accordance with the Standard
Detail for Restrained Pipe Lengths for Dead Ends to prevent the valve from
blowing off' when the piping in the lowering area is disassembled for repair or
replacement.
e. No services or connections are allowed between the isolation valves.
3 . All lowerings are subject to the clearance standards contained in these Criteria.
4. Lowerings may be designed utilizing manufactured bends or pipe joint deflections.
a. Manufactured bends shall be mechanical joint (MJ) fittings restrained by
approved mechanical joint restraints with restrained lengths in accordance with
the Standard Detail for Restrained Lengths w/ Approved Joint Restraints for
Lowerings.
b . Pipe joint deflection for DIP shall not exceed eighty percent (80%) of the pipe
manufacturer' s recommendation for maximum joint deflection.
C. Pipe joint deflection for PVC pipe shall not exceed one degree per section of
pipe. Bending of the pipe is not allowed.
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5 . All lowerings shall be labeled on the utility plans
6. When fittings are used, a detail for each lowering is required on the utility plans
showing size and elevation of both utilities, fittings, valves, distance between fittings,
casing diameter and thickness (if applicable) and other pertinent information.
7 . When pipe joint deflection is used, indicate on the utility plans the water main station
where the deflection starts and ends.
8 . Valves may be required at both ends of lowerings other than those noted in Section
3 .06 G. 2 . C . and, if required, shall be restrained or located sufficiently back from
lowering to prevent the valve from "blowing off' when the piping in the lowering area
is disassembled for repair or replacement.
9 . No water services, fire hydrants or fire lines shall be connected to the water main
within the lowering area.
H . Connections to Existing Distribution System
1 . FCU seeks to achieve a reliable and redundant water supply for its customers and to
minimize interruptions of service. A service interruption for the purpose of installing
a new water main connection to the existing distribution system must be closely
coordinated with and approved by FCU. Each request for a service interruption will
be evaluated from the standpoint of the impacts on customer water needs, water
quality, fire protection requirements and other pertinent factors that may arise for a
particular development proposal.
2 . Connections to the existing system may be made by installing a wet tap or by cutting
in a tee. The preferred approach is to install a wet tap. Each connection will be
reviewed by FCU to determine which method will be required.
3 . At the discretion of FCU, a valve may be required at each new connection point to
allow for isolation from the existing system.
I. Valves
1 . Gate valves shall be used on all mains up to and including 12-inch.
2. Butterfly valves shall be used on all mains 16-inch and larger and shall be installed in a
valve vault (See Butterfly Valve Vault Standard Detail) .
3 . Valves are required at all crosses and tees. The minimum number of valves at these
locations is generally the number of connections minus one. For example, a cross
fitting has four connections; therefore, the design should include a minimum of three
valves.
4. No more than 600 feet of water main shall be located between isolation valves. On
transmission water mains with no service connections, valve placement will be
evaluated on a case by case basis .
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5 . No more than one fire hydrant shall be located between isolation valves.
6 . Valves are required on both sides of stream crossings, railroad crossings and bored
crossings . Valves shall be located back from the crossing or restrained in such a
manner as to prevent the valve from "blowing off' when the pipe is disassembled
between the valves for maintenance or replacement. No water services shall be
connected to the water main between these valves.
7. Valves may be required on both sides of water main lowerings (See Section 3 . 06 G. of
these Criteria).
8 . FCU may require installation of additional valves not shown on the plans when
determined necessary in the field with coordination of the Owner/Developer and/or
Design Engineer.
9. Valves shall be located to provide maximum accessibility and shall not be placed in
areas subject to routine parking and storage operations.
10. Combination air release / vacuum valves are required at high points on all water mains
12-inch and larger and at all other locations as required by FCU.
I Fire Hydrants
1 . All fire protection, fire flow and fire hydrant requirements are subject to the approval
of the Poudre Fire Authority.
2 , Hydrant Spacing and Flow
Maximum Distance Maximum Distance Minimum Flow
Building to Hydrant (*) Between Hydrants (*) at 20 psi
Single-Family 400 Feet 800 Feet 1 ,000 gpm
Residential
Multi-Family
Residential & 300 Feet 600 Feet 1 , 500 gpm
Commercial
Distance measured on path of vehicle travel
3 . Where water mains are extended along streets through areas that will not be developed
open space, parks, etc.), hydrants shall be provided at spacing not to exceed 1 ,000
feet.
4. Hydrants shall be located at intersections whenever possible. Mid-block hydrants
shall be installed at the extension of a property line at a location that avoids conflicts
with dry utility service lines.
5 . Fire hydrants shall be placed at the end of all cul-de-sacs. The hydrant valve shall be
located in the paved street a minimum of 5 feet from the curb and gutter. The hydrant,
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gate valve, all pipe joints and fittings from the hydrant to a point a minimum of 100
feet upstream of the valve shall be restrained in accordance with the City of Fort
Collins - Water, Wastewater, Stormwater Development Construction Standards.
6. Hydrants laterals must be restrained at connection to main (swivel tee with gate valve
or wet tap with gate valve), at hydrant and at all joints between the distribution main
and the hydrant with approved joint restraint devices.
7 . Fire hydrant assemblies are required on all permanent or temporary dead end water
mains. The hydrant lateral shall be at a right angle to the distribution main installed
with a swivel tee. (See Fire Hydrant Installation Standard Detail).
8 . A 3 foot radius in all directions around the hydrant shall be free of all obstructions.
9 . Where hydrants are vulnerable to vehicular damage, hydrant shall be protected by fire
hydrant guard posts.
10. All fire hydrants shall have 6 foot depth of bury with fire hydrant flange above
finished grade by 0. 1 to 0.2 feet.
11 . Hydrants shall be located within the public R.O .W. or utility easement.
K. Thrust Restraint
1 . The preferred method of thrust restraint shall be accomplished by restraining pipe
joints and fittings with approved joint restraint devices on all water main fittings and
appurtenances to provide reaction support due to unbalanced thrust forces. The
minimum required restrained joint lengths shall be in accordance with the Standard
Details in these Criteria and the EBAA Iron - Restraint Length Calculator v7 . 1 .2 . The
Design Engineer is responsible for determining that the minimum lengths listed in the
Standard Details are adequate to provide the necessary thrust restraint for situations
encountered on the project.
2 . The basis for the restrained joint length calculations is listed on the Standard Details .
If the circumstances are different than those listed, the Design Engineer shall submit
revised calculations to FCU for approval.
3 . Restrained pipe lengths shall be clearly shown and detailed on the utility plans and
final Record Drawings.
4. Approved joint restraint devices shall be used on all joints and fittings for fire hydrant
installations from the connection at the water main to the connection of the hydrant to
the fire hydrant lateral. (See Standard Detail)
5 . Approved joint restraint devices shall be used on all pipe joints within a casing pipe.
6 . Approved joint restraint devices are listed in the City of Fort Collins - Water,
Wastewater, Stormwater Development Construction Standards .
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7 . With prior approval from FCU, concrete thrust blocks may be used when conditions
make it impractical to use restrained joints for thrust restraint or if requested by the
Contractor, at the discretion of FCU.
8 . When a new connection is installed on the existing FCU distribution system by cutting
in a tee or installing a wet tap, a concrete thrust block shall be used for thrust restraint
behind the tee or tapping saddle. This applies to connections for fire hydrants, fire
lines, distribution mains or large domestic services.
L. Services
1 . General
a. Water services shall be located a minimum of 10 feet from sewer services,
sanitary sewers, storm sewers and other non-potable pipelines .
b. Water services shall not be installed in the same trench with other utilities . The
only exception will be a fire line that will serve the same building. In this
situation, the domestic water service and the fire line shall be a minimum of 5
feet apart.
c. All portions of service lines shall be installed with a minimum of 4.5 feet of
cover and a maximum of 5 . 5 feet of cover from final finished grade.
d. Service taps shall be connected directly to FCU water system distribution mains
and shall not be connected to any fire hydrant lateral or fire service line.
e. Services shall be perpendicular to the main from the location of connection to a
point beyond the curb stop (and meter pit where applicable).
f. Service shall be the same size as the meter from the location of connection at the
main to a point 5 feet beyond the meter unless otherwise approved by the FCU
Water Utilities Senior Development Review Engineer. At the point 5 feet
beyond the meter, the size of the service line may be increased to reduce
hydraulic losses.
g. All services 3/4-inch through 2-inch shall have a curb stop located within R.O.W.
or utility easement adjacent to the R.O.W.
h. The shut-off/control valve for all services larger than 2-inch shall be an
approved gate valve at the point of connection to the distribution system water
main. The valve shall be restrained to the main at the point of connection with a
swivel tee, tapping sleeve or other approved joint restraint device.
i. Connection for a 3 -inch service shall be 4-inch tap with a 4-inch valve and a 4-
inch by 3 -inch reducer located at the point of connection at the water main.
j . Services from a property shall connect directly to a public water main without
crossing another private property. This requirement does not apply to the
common, private service lines serving single-family attached dwellings .
k. Materials :
1 ) 3/
4-inch & 1 -inch services shall be Type K copper.
2) 1 '/z-inch & 2-inch services shall be Type K copper or HDPE with tracer
wire.
3) Services larger than 2-inch shall be DI or PVC with tracer wire.
1. No service connections are allowed within a water main lowering.
in. No service connections are allowed within 10 feet of a utility crossing.
n. Domestic water services and fire lines for a given lot shall be connected the
FCU water main within the confines of the property lines extended.
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o. Domestic water services and fire lines that are not used with the development
shall be abandoned at the main in accordance with Section 3 . 11 of these Criteria.
2 . Domestic Services
a. General
1 ) Curb stops shall be located within R.O .W. or utility easement
approximately 1 foot from the property line or back of easement
boundary.
2) Mixed use buildings must have separate water services for the residential
and commercial portions of the building.
3) Sizing of water service lines for multi-family and commercial buildings
shall be done by the Design Engineer. When requested, the sizing
calculations shall be submitted to FCU for review and approval.
b . Single Family
1 ) Each single family lot shall have a separate 3/4-inch water service line
connecting directly to a FCU distribution system water main without
crossing another property.
2) Water service shall be placed near the center of the lot in a location that
will not be under a drive, tree or structure.
C. Single Family with Carriage House
1 ) On a single family lot, water service may be extended from the principal
residence to a carriage house if approved by FCU, if the water service has
adequate capacity for both buildings and if the buildings are on a single
platted lot under single ownership, and as otherwise consistent with City
Code.
d. Duplex
1 ) Each dwelling unit in a duplex shall have a separate water service
extending from an FCU water main.
e. Multi-Family
1 ) Each multi-family building shall have a separate water service connecting
directly to a FCU distribution system main without crossing another
property; however, FCU may require a multi-family building to have more
than one service.
f. Single Family Attached Dwellings
1 ) For single family attached dwellings where each dwelling unit is on a
separate platted lot, each unit must have a separate shut-off and meter;
however, if approved by FCU, a common, private water service can be
extended across property lines to serve up to six units with each unit
having a separate shut-off and meter connecting to the common, private
water service line. (See City Code Section 26-94)
g. Non-Residential
1 ) Each non-residential building shall have a separate water service
connecting directly to a FCU distribution system main without crossing
another property; however, FCU may require a non-residential building to
have more than one service.
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3 . Irrigation Services
a. Separate irrigation services and meters connecting to distribution system mains
are allowed subject to fees and charges included in Chapter 26 of City Code.
b. Each separate irrigation service must connect directly to an FCU distribution
system main and must not cross another property to reach the property being
irrigated.
C. An approved backflow device in compliance with all applicable City regulations
will be required on all irrigation services .
d. Sizing of water service lines for irrigation services shall be done by the Design
Engineer. When requested, the sizing calculations shall be submitted to FCU for
review.
e. The final capacity of a water service/meter is dependent on the system pressure
and water tap size. There is no guarantee of available flow based on meter size.
4. Fire Services
a. Fire sprinkler lines 2-inch and smaller shall have a curb stop located within
R.O.W. or utility easement adjacent to the R. O.W.
b. Fire sprinkler lines larger than 2-inch shall have an approved gate valve at the
point of connection to the FCU distribution system water main.
C. No domestic water service taps are allowed to connect to a fire line.
M. Meters
1 . All domestic and irrigation water services connected to the FCU water distribution
system shall be metered.
2 . Water meter sizes allowed include 3/4, 1 , 1 %2, 25 3 , 4, and 6-inch.
3 . Single family residences shall be limited to one 3/4-inch meter and service .
4. Meter locations :
a. 3/4-inch meters may be installed within a building or outside in a water meter pit.
See Standard Detail Drawings for interior and exterior meter settings.)
b. Meters 1 -inch and larger shall be installed outside in meter pits/vaults.
C. Modifications to the meter locations may be approved by the Utilities Executive
Director or his/her assigned delegate during the Development Review process.
5 . Interior meters shall be located where the water service enters the building and shall
not be in crawl spaces. In commercial buildings, interior meters must be installed in a
mechanical or fire riser room.
6. Exterior meters (3/4-inch through 2-inch) shall be installed within 2 feet of the curb
stop.
7 . Exterior meters shall be located in landscaped areas. The only exception to this is in
commercial areas where there is no landscaped area between the street and the
building.
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8 . Modification, alteration or relocation of metering equipment must be approved by
FCU before any such modification, alteration or relocation occurs .
8 . The Design Engineer/Developer is responsible for determining the potential loadings
on meter pits/vaults and shall provide adequate structural strength for these loadings.
FCU may require AASHTO HS-20 loadings at its option.
10. Meter installations must be located to provide protection from freezing and frost
damage.
N. Borings
1 . Water mains through City of Fort Collins or another agency' s R.O .W. or easement
may require a bored casing pipe to facilitate main installation. The type of bored
casing material and its properties will be specified by the agency granting permission
for the crossing. Such crossings are subject to the approval of FCU to avoid conflicts
between the requirements or standards between the City and the agency granting
permission to cross.
a. A letter, permit or approved crossing application from the agency granting
permission to cross must be provided to FCU prior to boring.
b. The City will not accept any crossings that require an annual user or crossing fee
be paid to the agency granting permission to cross. All bored crossing fees, if
applicable, shall be paid by the developer prior to boring.
C. Valves are required at each end of the boring.
O. Corrosion Control and Cathodic Protection
1 . Certain existing water mains within the FCU water transmission and distribution
system are equipped with cathodic protection (CP) systems.
a. All existing CP test stations shall be shown on the utility plans with notes to
protect in place.
b. When a new DIP water main is being connected to an existing CP main, the new
main must be isolated from the CP main by installing a short section of PVC
pipe (See Standard Detail).
C. When a new DIP water main is installed and is crossing a CP main, a CP test
station may be required to monitor the integrity of the CP system.
2 . If the use of DIP water main or steel casing is proposed, the Design Engineer shall
have a soil resistivity survey of the construction area performed by a certified
Geotechnical Engineer to evaluate the corrosion potential of the soil and to make
recommendations on any corrosion protection measures such as pipe type or cathodic
protection. The FCU Water Utilities Senior Development Review Engineer will
review the soil resistivity report, the Engineer' s recommendations and the service
history for the water system corrosion in the area and will determine the type of pipe
to be used or the type of corrosion protection to be provided prior to approval of the
utility plans.
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a. The distance between the soil sample locations for the survey shall be at the
discretion of FCU; however, testing frequency shall not be less than one test for
every 400 feet of pipe.
b. Soil samples shall be taken at pipe depth.
3 . All joints on the proposed DIP water main shall be bonded with the use of copper wire
exothermically welded to the sections of DIP main.
P.Casing Pipe
1 . Casing pipe shall be steel unless otherwise approved by the Water Utilities Senior
Development Review Engineer; however, FCU reserves the right to require a specific
casing pipe material for any public water main installation.
2 . Each casing pipe installation shall be specifically designed by the Design Engineer.
3 . If steel casing pipe is to be used, a soil resistivity analysis shall be performed and the
need for cathodic protection shall be evaluated in accordance with Section 3 .06 O. 2 .
of this Criteria.
a. A 20 pound anode and CP test station is required on both ends on a steel casing
pipe. The anode wire and the test station wire shall be exothermically welded to
the steel casing pipe.
Q. Phased Installations and Stub-outs
1 . If phasing of the water distribution system improvements is proposed by the
developer, the phasing shall be clearly defined and shown in the utility plans.
2 . The proposed phasing shall maintain looping integrity within the system.
3 . The phased system design shall meet all water demands and fire flow requirements for
the portion of the development being served.
4. An inline valve and fire hydrant (temporary or permanent) shall be required at the end
of each phase or stub-out. The fire hydrant assembly shall be constructed with the
hydrant off the side of the street (See for Fire Hydrant Installation Standard Detail) .
5 . Phased water mains/stub-outs shall be valved such that only one valve needs to be
closed when the main is extended and no customers are without service. The valve
must be appropriately restrained to prevent the valve from "blowing off' when the
water line is exposed and the thrust blocking is removed for extension of the main.
6 . Stub-outs not utilized shall be abandoned in accordance with these criteria.
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3 .07 SEPARATION FROM OTHER UTILITIES AND BUILDINGS
A. Horizontal
1 . Wet Utilities : Sanitary sewers, storm sewers, non-potable/reclaimed pipelines, etc.
running parallel to a public water main or related appurtenance shall not be closer than
10 feet.
2 . District Water Mains : If a water main is proposed to be installed parallel to a District
water main, the FCU separation requirement is 10 feet; however, the District should
also be contacted to determine if the District has any additional requirements.
3 . Dry Utilities : Natural gas, electric, cable TV, telephone/communication, etc . running
parallel to a public water main or related appurtenance shall be no closer than 10 feet.
In certain situations, there may be some flexibility to this requirement; however, this
would be an exception to the normal requirement and would only be allowed with the
approval of the FCU Water Utilities Senior Development Review Engineer.
4. Buildings and Structures : Water mains shall be a minimum of 15 feet from all
buildings and structures.
Be Vertical — When a water main crosses another public or private utility, irrigation or drainage
ditch or natural stream, the crossing design shall protect the water main and other utility' s
structural integrity, prevent contamination of the main and mitigate future system impacts
and costs of repair. The entity responsible for the utility, ditch, railroad or other structure
crossed may also impose additional criteria.
1 . All crossings shall be clearly identified and dimensioned on the plan view and profile
view on the utility plans .
2 . Water Crossing over Wastewater/Stormwater/Other non-potable Systems — When a
public water main crosses these types of systems, the water main shall cross above
with a minimum of 18-inches vertical clearance from the system and maintain the
minimum depth of cover required by these Criteria.
a. A vertical clearance of less than 18-inches may be allowed with prior approval
of the FCU Water Utilities Senior Development Review Engineer. In these
cases, all joints of the non-potable utility within 10 feet of the water main shall
be wrapped with butyl adhesive tape or all piping of the non-potable system
within 10 feet of the water main shall be C900/C905 PVC as required by the
FCU Water, Wastewater, Stormwater Development Construction Standards .
3 . Water Crossing under Wastewater/Stormwater/Other Non-Potable Systems - When a
public water main crosses under these types of systems, the water main should
maintain 18-inches of vertical clearance from such systems. All joints of the
wastewater/stormwater/other non-potable utility within 10 feet of the water main shall
be wrapped with butyl adhesive tape or the piping of the non-potable system within 10
feet of the water main shall be C900/C905 PVC as required by the FCU Water,
Wastewater, Stormwater Development Construction Standards .
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a. For wastewater, stormwater or other non-potable pipelines 18-inch and larger,
the water main shall be installed in a casing pipe. The casing shall extend a
minimum of 10 feet beyond each side of the crossing.
108 DITCH CROSSINGS
A. When a water main is crossing a Named Ditch Company, the Developer shall contact the
Ditch Company and obtain all permits and approvals for each crossing. In addition to the
requirements of these Criteria, the Ditch Company may add to or modify the requirements of
these Criteria, provided the requirements are more stringent. All permit/crossing fees and
costs shall be paid by the Developer.
I . Steel Casing — The casing shall be of sufficient length so that the ends of the casing
may be exposed without excavating in the ditch R.O .W. or easement and a minimum
of 10 feet beyond any toe or top of slope to ditch. The steel casing pipe shall be in
accordance with Section 3 . 06 P. of these Criteria.
2 . Cut-off Walls — A clay or concrete cut-off wall shall be placed on both ends of the
casing pipe. The cut-off wall shall extend to 1 foot above the maximum free surface
water elevation of the ditch (or as required by the Ditch Company) . (Refer to Standard
Details.)
3 . Cover — Cover over the casing shall be 3 feet or more from flowline of ditch to top of
casing.
4. Ditch Repair — All ditches shall be restored according to the Ditch Company' s
requirements .
B . Valves are required on both sides of the ditch crossing. Valves shall be located back from
the crossing or restrained in such a manner as to prevent the valve from "blowing off' when
the pipe is disassembled between the valves for maintenance or replacement. No water
services shall be connected to the water main between these valves .
3 . 09 ROUNDABOUT CROSSSINGS
A . Where an existing or proposed water main crosses a roundabout, the following design
criteria shall apply:
I . All valves, fittings, fire hydrants, services and appurtenances shall be located outside
the center median of the roundabout. It shall be the Developer' s responsibility to
relocate any of these existing facilities outside of the center median.
a. If there are no water mains connecting from a perpendicular alignment, the
water main may be installed in a casing pipe through the roundabout median. It
shall be the Developer' s responsibility to re-construct and install any existing
water main in a casing.
1 ) If the water main is installed in a casing, isolation valves shall be installed
on both sides of the roundabout 40 feet from each end of the casing and
shall be restrained in accordance with the Standard Detail for Restrained
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Pipe Lengths for Dead Ends to prevent the valve from "blowing off' when
the piping in the roundabout area is disassembled for repair or
replacement.
2) Approved joint restraint devices shall be used on all pipe joints within a
casing pipe.
3) No services or connections are allowed between the isolation valves.
b. If there are water mains connecting from a perpendicular alignment, all water
mains shall be routed around the center median. (See Standard Detail) It shall
be the Developer' s responsibility to re-locate any existing water mains.
2 . Water service taps shall be located a minimum of 5 feet outside the roundabout center
median. It will be the Developer' s responsibility to relocate any service taps outside
of the median.
3. 10 LANDSCAPE SEPARATION DISTANCES
A . Trees — Trees shall be a minimum of 10 feet from all water mains and fire hydrants and 6
feet from water services including curb stops and meter pits/vaults .
B .Shrubs — Shrubs shall be a minimum of 4 feet from water mains, fire hydrants and water
services.
3.11 ABANDONMENT OF MAINS AND SERVICES
A. Any water mains or water services that were installed and will not be used (such as in the
case of a replat or change in project layout) shall be abandoned. Services will be required to
be abandoned at the main, unless otherwise directed by FCU. This shall include excavating
at the main and disconnecting the line to be abandoned as directed by FCU Field Operations
Staff. Each situation will be evaluated on a case-by-case basis to determine if the valve at
the connection point is to be removed. For a main abandonment, the main shall be
abandoned to the last water main connection point or to the last remaining in-service portion
of the water main, as determined by FCU. All fire hydrants, valve boxes, curb stops and
meter pits/vaults associated with the main being abandoned shall be removed.
B . When a water main is to be abandoned and the main will not be under a proposed building,
the main may be abandoned in place and left in the ground if approved by FCU and labeled
accordingly on the City approved utility plans. The abandoned main shall be drained and
both ends shall be plugged with concrete. Mains 12-inch and larger shall be flash filled in
accordance with the City of Fort Collins - Water, Wastewater, Stormwater Development
Construction Standards.
C. Any existing water services within or adjacent to a site being re-developed that are not being
used shall be abandoned at the main as directed by FCU Field Operations Staff. This shall
include the removal of the curb stop box or valve box on the abandoned service and removal
of any meter pits/vaults .
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SECTION 4 — WASTEWATER COLLECTION DESIGN CRITERIA
4.01 GENERAL
These Criteria typically apply to sanitary sewers 15 -inch diameter and smaller. Larger sanitary
sewers are classified as interceptor sewers . If a development project includes any construction of
or modification to an interceptor sewer, contact the FCU Water Utilities Senior Development
Review Engineer and the FCU Water Engineering Capital Projects Division for design and
construction requirements.
4.02 WATER/WASTEWATER DEMAND ANALYSIS REPORT
In conjunction with the City' s Development Review Process, FCU may require that the Design
Engineer submit a Water/Wastewater Demand Analysis Report at the time of PDP . If the analysis
report is required, a meeting with FCU Water Utilities Senior Development Review Engineer must
be held to determine the outline and scope of the report.
4.03 WASTEWATER SYSTEM MODELING
If dynamic analysis is needed for proper sizing of sanitary sewers, FCU will assist with the
necessary modeling to evaluate the proposed project and associated demands with detailed
information provided by the Design Engineer.
4.04 FCU WASTEWATER SERVICE AREA
A. FCU provides wastewater service to a portion of the area inside City limits and other areas
to the northwest of the City including parts of the community of Laporte, Colorado. (See
Wastewater Utility Service Areas Map in Appendix B for a map current as of the date of
adoption of this manual.)
B .Certain portions of Fort Collins receive wastewater service from the following districts :
Boxelder Sanitation District
3201 E Mulberry, Suite Q
Fort Collins, CO 80524
Telephone : 970-498-0604
Cherry Hills Sanitation District
512 N Link Lane
Fort Collins, CO 80524
Telephone : 970-493 -6130
South Fort Collins Sanitation District
5150 Snead Drive
Fort Collins, CO 80525
Telephone : 970-226-3104
C . When designing sanitary sewer extensions, it is important to avoid designing/constructing
mains which would interconnect with these various utilities .
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4.05 WASTEWATER PUMP STATIONS
Pump stations are generally discouraged. FCU currently has no public pump stations in the
Wastewater Collection System. If a FCU pump station is to be considered, it must be a regional
station serving a large area rather than a station serving an individual subdivision or development.
All pump stations must be approved by the Water Engineering and Field Services Manager. If
allowed, the details and requirements pertaining to the type, design and construction of the pump
station will be determined at that time.
4.06 WASTEWATER COLLECTION SYSTEM DESIGN AND LAYOUT
A. General
1 . Each property or lot shall have frontage on public R. O .W. so that any service lines will
not cross another property .
2 . The design and layout of the system must provide for the extension of the sanitary
sewers to adjacent properties that may develop in the future.
3 . Utility locations, alignments and separations noted herein are required for new
developments and redeveloping areas.
4. It is very important within each development or redevelopment area that the site layout
be designed in such a manner that accommodates acceptable access for future
maintenance by FCU. This includes providing adequate separation distances from
other utilities and structures and providing the easements necessary for future
maintenance activities.
5 . Sanitary sewers shall extend across the entire frontage of a property unless otherwise
approved by FCU.
6. No connections to the wastewater collection system are allowed which would add
surface water or groundwater to the wastewater system. This includes roof drains,
drainage tiles, foundation drains, area drains, etc.
7 . Floor drains internal to covered parking that collect drainage from drippings off
parked vehicles or water used for washing down internal floors shall be connected to
the sanitary sewer using appropriate sand and oil interceptors. The drainage from the
top floor of a parking facility which is subject to runoff caused by precipitation events
shall not be discharged to the sanitary sewer system.
B. Hydraulic Design
1 . Design Flows : Wastewater design flows shall be the peak daily flow plus wet weather
infiltration and inflow (I&I) . The per capita or per acre flow contributions and I&I
flow contributions are subject to the approval of the FCU Water Utilities Senior
Development Review Engineer.
2 . Manning s Equation using Mannings Coefficient of n = 0.013 shall be used for sizing
sewers.
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3 . Minimum sizes : Minimum size for public sanitary sewers is 8-inch. Minimum size
for private sewer services is 4-inch.
4. Depth of Flow: The maximum allowable depth to diameter ratio for sanitary sewer
flows at peak flow conditions is d/D = 0. 5 for sewers up to and including 15 -inch. For
sewers larger than 15-inch, contact the FCU Water Utilities Senior Development
Review Engineer and the FCU Water Engineering Capital Projects Division for design
and construction requirements .
5 . Velocity: Sanitary sewers shall be designed so that the design flow velocity is at least
2 feet per second and does not exceed 10 feet per second.
6 . Slope : The following table gives the minimum and maximum allowable slopes for
sanitary sewers. All sanitary sewers shall be designed and constructed with constant
slope between manholes .
Diameter Minimum Slope Maximum Slope
Inches) Percent) Percent)
Services
4 2 .0% 21 .0%
6 1 .0% 12 .2%
Mains
8 0 .40% 8 .4%
10 0 .28% 6. 1 %
12 0 .22% 4.9%
15 0 . 15% 3 .6%
C. Pipe Material
1 . The only pipe material for gravity sanitary sewers currently included in the City of
Fort Collins — Water, Wastewater, Stormwater Development Construction Standards is
polyvinyl chloride (PVC) pipe. If an alternate material is proposed, it shall be
evaluated in accordance with Section 01000 and Section 01600 of the City of Fort
Collins - Water, Wastewater, Stormwater Development Construction Standards and
Section 1 .05 of these Criteria.
D. Alignment
1 . Within platted streets, sanitary sewers are typically on the centerline of the street and
water mains are a minimum of 10 feet from the sewer. If this location is not possible,
the sanitary sewer should be aligned such that the manholes are in the center of a
travel lane so as to not be in a wheel path. In those situations, the sanitary sewers must
also be a minimum of 5 feet from the curb and gutter.
2 . No curvilinear sanitary sewers are allowed.
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E. Sewer Depth
1 . Minimum cover above top of sanitary sewers shall be 4 feet.
2 . Depths greater than 20 feet require approval of the FCU Water Utilities Senior
Development Review Engineer and may require greater separation distances from
other utilities, structures and landscaping and may require additional easement width.
F.Groundwater Barriers
1 . In situations where groundwater is known or found to be above the elevation of the
sanitary sewer or if there is a possibility that groundwater may be diverted by the
construction of the new water mains and sanitary sewers, groundwater barriers shall be
constructed within the sanitary sewer trench to prevent groundwater migration or
diversion along the sewer main.
2 . Groundwater barriers are typically located upstream of manholes and shall be spaced a
maximum of 400 feet apart.
3 . Groundwater barriers shall extend through the full depth of the granular bedding/pipe
zone material and project 1 foot beyond each side of the trench wall. In addition, the
groundwater barrier shall extend to a point 1 foot above the maximum peak wet season
subsurface groundwater level but not less than 3 feet above the top of pipe.
4. Groundwater barriers shall be installed on both sides of all natural waterways , ponds,
lakes or irrigations ditches .
5 . Groundwater barriers shall be shown and labeled on the sanitary sewer plan and
profile sheets of the utility plans .
G. Manholes
1 . Manholes are required at any change in size, slope or direction of a sanitary sewer, at
connecting points with other sanitary sewers and at the end of a sanitary sewer line.
2 . When a pipe is stubbed out of a manhole for a future sewer connection, the stub-out
shall be no more than 2 feet long.
3 . Manholes shall not have less than 90 degrees between incoming and outgoing sanitary
sewers.
4. Manholes are required at points where services larger than 6 -inch diameter connect to
sanitary sewers.
5 . Maximum spacing between manholes shall be 500 feet with typical spacing at 400
feet.
6 . Manholes shall have a minimum 0. 1 foot drop in invert elevation for straight through
manholes. Manholes with change in horizontal flow direction greater than 30 degrees
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shall have 0.2 foot drop between incoming invert elevation(s) and outgoing invert
elevation.
7 . Manholes with more than 2 feet between inlet and outlet invert elevations shall be
constructed with an outside drop connection.
8 . No inside drop connections are allowed.
9 . When there is a change in size of sanitary sewer at a manhole, the crowns of the two
sewers shall be set at the same elevation. However, if a lateral sanitary sewer is
connecting to an interceptor sewer ( 18-inch or larger in diameter), the invert of the
lateral sewer should be set at the crown of the interceptor.
10. Minimum diameter for manholes is listed in the Standard Manhole Detail Drawing.
Larger manholes may be required to accommodate multiple incoming mains or large
radius horizontal flow channel bends.
11 . Manhole invert channels shall be formed with smooth curves having as large a radius
as the manhole will permit to minimize turbulence. The flow channel shall be U-
shaped with a height equal to three-fourths the diameter of the outgoing sanitary
sewer.
12 . Manholes shall maintain a minimum clearance of 5 feet from curb and gutter and 10
feet from cross pans to the outside edge of the manhole.
13 . If subject to flooding, manhole shall have a bolted, water-tight ring and cover. Bolted,
water-tight ring and covers shall be noted and labeled on the sewer plan and profile
drawings .
14. When connection is proposed to an existing manhole, FCU will assess the condition of
the manhole to determine if special construction, repair or replacement by developer
will be required.
15 . All connections to existing manholes shall be made by core drilling and grout sealing
the opening into the manhole above the manhole bench. The Design Engineer shall
use the elevation of the top of the bench as the starting elevation for the new sewer, or
if connecting to an interceptor sewer, use the criteria contained in 4 .06 G. 9. When
connection is above the manhole bench, add a note to construct/form a new invert to
direct the flow to the existing, main channel.
16 . All weather access roads shall be required to manholes located outside of street
R.O .W. Access roads shall be a minimum of 15 feet wide and designed and
constructed to support maintenance vehicles weighing 40 tons . Carsonite marker posts
provided by FCU) shall be placed at all manholes outside of street R.O .W.
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H. Services
1 . General
a. Within the R. O.W. , services shall be perpendicular to the sanitary sewer main.
b. Sanitary sewer services shall be a minimum of 10 feet from all water services.
c. Sanitary sewer services shall not be installed in trenches with other utilities.
d. Sanitary sewer services for a given property must be installed on the sanitary
sewer main within the confines of the property lines extended.
e. Cleanouts are required at all changes in vertical or horizontal alignment and at
100 ' maximum intervals .
f. Mixed use buildings must have separate sewer services for the residential and
commercial portions of the building.
g. Sanitary sewer services are not allowed to connect at manholes unless approved
by FCU Water Utilities Senior Development Review Engineer.
h. For sanitary sewer services 8-inch or larger, a manhole is required at the point of
connection.
i. Connection of 6-inch service to an 8-inch sewer must be made by cutting in a
tee or wye fitting or installing a manhole.
j . Sanitary sewer services that are not used shall be abandoned at the main in
accordance with Section 4. 11 of these Criteria.
2 . Residential
a. Single Family
1 ) Each single family lot shall have a separate sewer service line connecting
directly to a FCU sanitary sewer without crossing another property.
2) Services shall be located in the downstream portion of each lot a
minimum of 10 feet from the water service for that portion located within
public R.O.W. or easement.
b. Single Family with Carriage House
1 ) On a single family lot, sewer service may be extended from the principal
residence to a carriage house if approved by FCU, if the sewer service has
adequate capacity for both buildings and if the buildings are on a single
platted lot under single ownership, and as otherwise consistent with City
Code.
c . Duplex
1 ) Each dwelling unit in a duplex shall have a separate sewer service
extending from an FCU sanitary sewer main.
d. Multi-Family
1 ) Each multi-family building shall have a separate sewer service connecting
directly to a FCU sanitary sewer without crossing another property;
however, FCU may require a multi-family building to have more than one
service.
f. Single Family Attached Dwellings
1 ) For single family attached dwellings where each dwelling unit is on a
separate platted lot, each unit must have a separate sewer service with
cleanout; however, if approved by FCU, a common, private sewer service
can be extended across property lines to serve up to six units . (See City
Code Section 26-256)
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g. Non-Residential
1 ) Each non-residential building shall have a separate sewer service
connecting directly to a FCU sanitary sewer without crossing another
property; however, FCU may require a non-residential building to have
more than one service.
2) Monitoring manholes may be required on services from non-residential
facilities with high-strength waste.
3) Grease interceptors are required on the services for all restaurants and
facilities with commercial kitchens .
4) Sand and oil interceptors are required on services from facilities with
indoor auto service bays and from services from the portions of parking
garages that do not collect runoff from rainfall or snow melt.
5) Details for grease interceptors and sand and oil interceptors are included
in the City of Fort Collins - Water, Wastewater, Stormwater Development
Construction Standards .
I. Subdrains
1 . Subdrains shall not be connected to the wastewater collection system. Subdrains shall
only discharge to the storm drainage system or designed detention areas.
2 . Subdrains may be permitted in public R.O .W. If allowed, the Developer shall be
required to submit a soils investigation and report as outlined in Chapter 5 of the
LCUASS for review and approval by the City Engineering Department.
3 . Subdrains built in the public R.O.W. for private drainage shall be private
improvements and shall include provisions for maintenance by the local homeowners
association or other private entity.
4 . Subdrains shall meet the requirements contained in Chapter 12 of the LCUASS .
J. Borings
1 . Sanitary sewers through City of Fort Collins or another agency' s R. O.W. or easement
may require a bored casing pipe to facilitate main installation or replacement. The
type of bored casing material and its properties will be specified by the agency
granting permission for the crossing. Such crossings are subject to the approval of
FCU to avoid conflicts between the requirements or standards between the City and
the agency granting permission to cross.
a. A letter, permit or approved crossing application from the agency granting
permission to cross must be provided to FCU prior to boring.
b. The City will not accept any crossings that require an annual user or crossing fee
be paid to the agency granting permission to cross. All bored crossing fees, if
applicable, shall be paid by the developer prior to boring.
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K. Casing Pipe
1 . Casing pipe shall be steel unless otherwise approved by the Water Utilities Senior
Development Review Engineer; however, FCU reserves the right to require a specific
casing pipe material for any public sewer main installation.
2 . Each casing pipe installation shall be specifically designed by the Design Engineer.
3 . If steel casing pipe is to be used, a soil resistivity analysis shall be performed and the
need for cathodic protection shall be evaluated in accordance with Section 3 .06 O. 2 ,
of these Criteria.
a. A 20 pound anode and CP test station is required on both ends on a steel casing
pipe. The anode wire and the test station wire shall be exothermically welded to
the steel casing pipe.
L. Phased Installations and Stub-outs
1 . If phasing of the wastewater collection system improvements is proposed by the
developer, the phasing shall be clearly defined and shown in the utility plans.
2 . The phased system shall be designed for full build out of the development being
served including any additional offsite flows that must be passed through the
development.
3 . The stub-out design and installation shall maintain the vertical and horizontal
alignment in accordance with these Criteria and with the City approved utility plans.
4. The system shall be designed such that a manhole is located at the phase line between
portions of the development or the sanitary sewer shall be extended to the next
manhole with the phase under construction
5 . Sanitary sewer main stub-outs not utilized shall be abandoned in accordance with
these Criteria.
4.07 SEPARATION FROM OTHER UTILITIES
A. Horizontal
1 . Water mains and storm drains shall be a minimum of 10 feet horizontally from any
part of the FCU wastewater collection system.
2 . Dry Utilities (Natural gas, electric, cable TV, telephone/communication, etc .) shall be
a minimum of 10 feet horizontally from any part of the public wastewater collection
system.
B. Vertical — When a sanitary sewer crosses anther public or private utility, irrigation or
drainage ditch or natural stream, the crossing design shall protect the sanitary sewer and
other utility' s structural integrity, prevent contamination of the main and mitigate future
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Adopted: 04 /_02_/_2017_
system impacts and costs of repair. The entity responsible for the utility, ditch, railroad or
other structure crossed may also impose additional criteria.
1 . All crossings shall be clearly identified and dimensioned on the plan view and profile
view on the utility plans .
2 . SanitM Sewer Over or Under a Water Main — See Section 3 .07 of these Criteria.
3 . Sanitary Sewer Crossing Over Storm Drainage Systems — When a public sanitary
sewer crosses over a storm sewer, the sanitary sewer should cross above with a
minimum of 18-inches vertical clearance from the storm drain system and maintain the
minimum depth of cover required by these Criteria.
a. A vertical clearance of less than 18-inches may be allowed with prior approval
of the FCU Water Utilities Senior Development Review Engineer.
4, Sanitary Sewer Crossing Under Storm Drainage System - When a public sanitary
sewer crosses under a storm drain, the sanitary sewer should have a minimum of 18-
inches of vertical clearance from the storm drain.
a. A vertical clearance of less than 18-inches may be allowed with prior approval
of the FCU Water Utilities Senior Development Review Engineer.
b . For storm drains 24-inch and larger, the sanitary sewer shall be installed in a
casing pipe.
4.08 DITCH CROSSINGS
A. When a sanitary sewer is crossing a Named Ditch Company, the Developer shall contact the
Ditch Company and obtain all permits and approvals for each crossing. In addition to the
requirements of these Criteria, the Ditch Company may add to or modify the requirements of
these Criteria, provided the requirements are more stringent. All permit/crossing fees and
costs shall be paid by the Developer.
1 . Steel Casing — The casing shall be of sufficient length so that the ends of the casing
may be exposed without excavating in the ditch R.O .W. or easement and a minimum
of 10 feet beyond any toe or top of slope to ditch. The steel casing pipe shall be in
accordance with Section 4. 06 K. of these Criteria.
2 . Cut-Off Walls — A clay or concrete cut-off wall shall be placed on both ends of the
casing pipe. The cut-off wall shall extend to 1 foot above the maximum free surface
water elevation of the ditch (or as required by the ditch company) . (Refer to Standard
Details.)
3 . Cover — Cover over the casing shall be 3 feet or more from flowline of ditch to top of
casing.
4. Ditch Repair — The ditch being crossed shall be restored in accordance with the ditch
owner' s requirements .
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Adopted: 04 /_02_/_2017_
4.09 ROUNDABOUT CROSSINGS
A. Where an existing or proposed sanitary sewer crosses a roundabout, the following design
criteria shall apply:
1 . Manholes shall be located outside of the center median of the roundabout and in the
center of a travel lane.
a. If there are no sanitary sewers connecting from a perpendicular alignment, the
sewer shall be installed in a casing pipe through the roundabout median. It shall
be the Developer' s responsibility to re-construct and install any existing sewers
in a casing. Approved joint restraint devices shall be used on all pipe joints
within a casing pipe.
b. If there are sanitary sewers connecting from a perpendicular alignment, all
sewers shall be routed around the center median with all manholes located in the
center of a travel lane. It shall be the Developer' s responsibility to re-locate any
existing sewers.
2 . Sewer service taps shall be located a minimum of 5 feet outside the roundabout. It
will be the Developer' s responsibility to relocate any existing service taps outside of
the roundabout.
4.10 LANDSCAPE SEPARATION DISTANCES
A. Trees — Trees shall be a minimum of 10 feet from sanitary sewers and 6 feet from sewer
services.
B .Shrubs — Shrubs shall be a minimum of 4 feet from sanitary sewers and sewer services.
4.11 ABANDONMENT OF MAINS AND SERVICES
A.Any sanitary sewers that were installed and will not be used (such as in the case of a replat
or change in project layout) shall be abandoned at a manhole. This shall include excavating at an
existing manhole, disconnecting and plugging the line to be abandoned as directed by FCU Field
Operations Staff. Each situation will be evaluated on a case-by-case basis to determine if other
special requirements will apply.
B . All manholes on an abandoned sanitary sewer shall be removed and the ends of the sanitary
sewer shall be plugged with concrete.
C . When a sanitary sewer is to be abandoned and will not be under a proposed building, the
sanitary sewer may be abandoned in place and left in the ground if approved by FCU and labeled
accordingly on the City-approved utility plans. The ends of the sanitary sewer shall be plugged
with concrete. Sanitary sewers 12-inch and larger shall be flash filled in accordance with the City
of Fort Collins - Water, Wastewater, Stormwater Development Construction Standards .
D.Any existing sewer services within or adjacent to a site being re-developed that are not being
used shall be abandoned at the main as directed by FCU Field Operations Staff.
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Adopted: _04_/_02_/_2017_
Appendix A - Utility Plan Checklist
Fort Collins Utilities Water and Wastewater Design Criteria
Water/Wastewater Utility Plan Checklist
Items below specified with "FP" are only required at the time of Final Development Plans . All
other items are required to be provided in both the PDP and FDP plan submittals .
Overall Utility Plan
Included N/A Requirements
R. O.W. lines, property lines and easements
Curb and gutter, cross-pans, sidewalks (attached or detached ) and medians
Water: Existing and proposed distribution system facilities including valves, hydrants, bends,
lowerings, crossings, services, meter pits/vaults, sizes of all mains/services with detailed
labeling for all items
Wastewater: Existing and proposed collection system facilities including manholes, services,
crossings, sizes of all mains/services With detailed labeling for all items
Dry Utilities : Existing and proposed gas, electric, telephone, cable, etc.
Proposed private subdrains (where applicable)
Irrigation ditches
Match lines with corresponding sheet numbers referenced
Water/sanitary sewer main abandonments
FP — Development/construction phasing lines
j_j
Water Plan (and Profile when applicable)
Included N/A Requirements
R. O.W. lines, property lines and easements with dimensions
Existing and proposed streets, curb and gutter, sidewalks, medians, cross-pans, intakes and
other structures
Existing and proposed water mains, services/curb stops/meter pits ( including irrigation ),
valves, fittings, fire hydrants, connections to existing system and all appurtenances with
detailed labeling for construction
Existing and proposed sanitary sewer mains, services and all appurtenances
Existing and proposed storm sewers and all appurtenances
Proposed private subdrains and cleanout locations
Existing and proposed dry utilities (e .g. gas, electric, telephone, cable, etc. )
Locations of fixed objects (e .g. trees, poles, fences, etc. )
Irrigation ditches
Match lines with corresponding sheet numbers referenced
Utility crossings labeled with sizes, elevations and clearances
Lowerings showing fittings or sweeps with dimensions and elevations
Casing pipes with material, diameter, thickness and length noted
Abandonment of water mains
Cathodic Protection (CP) systems on existing mains including the location of CP test stations
FP - Lengths of water main between valves, fittings, hydrants, etc.
FP - Restrained pipe lengths for thrust restraint at all fittings, lowerings, dead ends, etc.
FP - Pipe or street centerline longitudinal stationing
FP - For water mains 12-inch and larger, provide water main profile drawings showing
existing and proposed ground surfaces with water main depths labeled, existing and
proposed utility crossings and all pertinent underground features or information
FP - Development/construction phasing lines
Effective Date :
Wastewater Plan and Profile
Included N /A Requirements
R. O.W. lines, property lines and easements with dimensions
Existing and proposed streets, curb and gutter, sidewalks, medians, cross-pans, storm
intakes and other structures
Existing and proposed sanitary sewers, services, connections to existing system and all
appurtenances
Existing and proposed water mains, services/curb stops/meter pits (including irrigation ),
valves, fittings, fire hydrants, connections to existing system and all appurtenances
Existing and proposed storm sewers and all appurtenances
Proposed private subdrains and cleanout locations
Existing and proposed dry utilities (e .g. gas, electric, telephone, cable, etc. )
Locations of fixed objects (e .g. trees, poles, fences, etc. )
Irrigation ditches
Match lines with corresponding sheet numbers referenced
Abandonment of sewers
Utility crossings labeled with sizes, elevations and clearances
Casing pipes with material, diameter, thickness and length noted
FP — Profile of all sanitary sewers
FP - Length of sewer between manholes and longitudinal stationing on manholes and
services with detailed labeling for construction
FP - Manhole rim and inflow/outflow invert elevations
FP - Existing and proposed ground surface
FP - Encasement as required when sanitary crosses above a water main
FP - Groundwater barriers where applicable
FP - Development/construction phasing lines
Detail Sheets
Included N/A Requirements
Applicable City of Fort Collins Utilities water, sanitary sewer and stormwater details
Details of special connections, crossings or construction specific to this project
Effective Date :
Appendix B = Utility Maps
Water Utility Service Areas
Water Pressure Zones
Wastewater Utility Service Areas
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