HomeMy WebLinkAbout006 - 01/19/2016 - AMENDING CHAPTER 26 OF CITY CODE AND THE FORT COLLINS STORMWATER CRITERIA MANUAL TO MODIFY THE CRITE ORDINANCE NO. 006, 2016
OF THE COUNCIL OF THE CITY OF FORT COLLINS
AMENDING CHAPTER 26 OF THE CODE OF THE CITY OF FORT COLLINS
AND THE FORT COLLINS STORMWATER CRITERIA MANUAL
TO MODIFY THE CRITERIA FOR UNDERGROUND DETENTION SYSTEMS
WHEREAS, on December 20, 2011, the City Council adopted Ordinance No. 174, 2011,
which amended certain sections of Chapter 26 of the City Code and adopted a set of technical
criteria governing the design and performance of storrwater improvements and related practices
by adopting by reference certain portions of the Urban Drainage and Flood Control District
("UDFCD") Criteria Manual, 2001 Edition, published by the Denver Urban Drainage and Flood
Control District, as modified by the Fort Collins Amendments, also adopted by Ordinance No.
174, together referred to and codified as the Fort Collins Stormwater Criteria Manual (the
"Manual"); and
WHEREAS, the Manual, including the separately codified Fort Collins Amendments, has
been modified from time to time by limited technical revisions adopted administratively by the
Utilities Executive Director and filed with the City Clerk as authorized by in City Code Section
26-500; and
WHEREAS, as adopted with the Fort Collins Amendments, the Manual currently
prohibits underground detention as a stormwater management practice, except upon special
review and exception granted at the discretion of the Utilities Executive Director; and
WHEREAS, as part of recent reviews of the City's Municipal Separate Stormwater
System, and in an effort to align the Manual with Low Impact Development policies adopted by
City Council in March 2013, City staff has developed a new amendment to the Manual that
establishes detailed underground detention system criteria("UDS amendment"); and
WHEREAS, the purpose of the UDS amendment is to facilitate. appropriate use of
underground stormwater detention as a best management practice, ensuring predictable, safe,
maintainable, and effective construction and maintenance of such systems; and
WHEREAS, the UDS amendment was presented to the Water Board at its November 18,
2015, 'regular meeting, and the Board voted unanimously to recommend City Council adoption
of the amendment; and
WHEREAS, the City Council finds that amending the Manual to facilitate predictable
and appropriate construction and maintenance of underground stormwater detention systems,
based on documented review criteria, benefits the City's citizens and Stormwater Utility
customers by creating a regular process to accommodate such systems. . .
NOW, THEREFORE, BE IT ORDAINED BY THE COUNCIL OF THE CITY OF
FORT COLLINS as follows: '
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Section 1. That the City Council hereby makes and adopts the determinations and
findings set forth in recitals above.
Section 2. That Paragraph 4.16 of Volume 2, Chapter 10, Section H of the Fort
Collins Amendments, which is a component of the Fort Collins Stormwater Criteria Manual, is
hereby amended to read as follows:
4.16 Underground Detention
4.16.1 Polic
The use of structural underground detention is generally discouraged, except when the criteria set
forth in 4.16.2 are satisfied. Underground BMPs should not be considered for detention storage
when surface-based systems are practicable. The system owner must demonstrate that surface-
based detention or other BMPs have been thoroughly evaluated and found to be infeasible before
an underground system is proposed. If an underground storage system is proposed, a system
owner must seek approval of such a system by the Utilities Executive Director, who may
approve such a system upon a determination that the requirements of 4.16.2 are satisfied and that
no adverse impacts are expected to result from the proposed system.
4.16.2 Underground Detention Criteria.
The purpose of this subsection is to set forth technical criteria to be utilized for the use of
underground stormwater detention as a structural BMP to meet water quality and/or
stormwater runoff detention requirements.
(a) All systems.
Any proposed underground stormwater detention system, including gravel
reservoirs in porous interlocking concrete pavement (PICP) systems and
chambers or pipes, shall satisfy the following design and operating criteria:
1. The system owner shall provide to the City a Standard Operating
Procedures (SOPS) Manual detailing the operation and maintenance of the
proposed system. The SOPs Manual must comply with approved and
updated operational and maintenance procedures maintained by the City
for different types of underground detention systems. The SOPs Manual
must be submitted to and approved in written form by the Utilities
Executive Director prior to system approval and operation. A final copy of
the approved SOPS Manual must be maintained on-site by the party
responsible for facility maintenance. Annual reports must be prepared and
submitted to the City detailing the results of the maintenance program (i.e.
inspection dates, inspection frequency, volume loss due to sedimentation,
corrective actions taken, etc.);
2. Runoff must flow through a pre-treatment facility before it enters the
underground detention system;
3. A gravity 'outfall is required at the invert, i.e. lowest point, of the
underground detention system;
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4. An observation well is required at the downstream end with a perforated
stand pipe, as well as a redundant overflow inlet located in a sump
condition. The redundant inlet must be designed with pre-sedimentation
control at the upstream end of the inlet;
5. The water table level must be documented to be at least one foot (1')
below reservoir bottom during the high groundwater period of the calendar
year;
6. Where underdrain drainage systems are needed, due to underlying soil
conditions, the underdrain pipe diameter shall be at least eight inches (8").
Underdrain cleanouts are required at all changes in direction or elevation
locations. If the minimum underdrain size (8") results in a release rate
larger than allowed under this Manual, a restrictor plate must be added at
the point of outflow;
7. Potential lateral movement of detained storage water outside the limits of
the detention storage reservoir must be controlled, accounted and designed
for in a manner that ensures the structural integrity of adjacent structures
and infrastructure; .
8. Infiltration testing must be performed during installation of open
bottom/infiltrating systems, after excavation is complete and before rock
placement in reservoir. These results must be submitted to the City and
approval obtained before commencement of construction activities on the
underground detention facility(ies). If the underground detention reservoir
is intended to allow for infiltration, the bottom of the reservoir must be
protected during construction to minimize compaction;
r
9. Annual visual inspection is required for all underground detention
systems. Documentation verifying inspection and performance must be
provided to the City within four (4) weeks after completion of annual
inspection. These inspection reports must be filed and`available at the City
of Fort Collins Utilities office;
10. The underground detention system owner must submit for review a deed
restriction on the affected real property, incorporating the SOPS and
penalties specified for lack of performance. SOPS must be included in the
site's Development Agreement, as well as in the deed restriction, subject
.to review by the City Attorney's Office. The deed restriction must
provide for the continued, long term operation and maintenance of the
underground detention system by subsequent owners of the affected
property and must be fully executed by the owners of the affected property
and recorded prior to system approval and operation; and
11. The deed restriction must also provide that if the City deems that the
underground detention system is not being maintained in accordance with
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the SOPS specified in the deed restriction, and the system owner has been
given written notice and at least ten (10) days to cure and has not done so, .
the City shall have the right of entry to the property in order to maintain
the system. The City may then charge the owner the time and material
costs incurred by the City to take corrective action and maintain the
system, in addition to any administrative costs incurred by the City.
(b) Detention reservoirs located in gravel void spaces of PICP systems.
In addition to the criteria set forth in 4.16.2 (a), the following additional criteria
apply to any Porous Interlocking Concrete Pavement (PICP) system with a gravel
layer void space:
1. The maximum water quantity detention volume allowed in the subsurface
void space is the greater of 0.2 acre-feet or 20% of the total water quantity
and water quality detention required. The maximum total detention storage
volume to be accounted for in the void space of gravel reservoirs shall be
less than 1.0 acre-foot. Additional storage volume is allowed in chambers
or pipes or a combination of all the system methods;
2. The material specified in the reservoir storage layer must comply with
ASTM Number 2 specifications for rock aggregate, or an alternate
approved in writing by the Utilities Executive Director. A 30% ratio for
available storage volume in the reservoir layer must be used in volume
calculations in order to account for potential sedimentation;
3. A minimum 13,500 pound-force vibratory plate compactor with a
compaction indicator and/or a minimum, l0-ton vibratory roller must be
used to compact the system;
4. A PICP parking lot surface must be designed with a minimum 0.5% slope.
All systems must be designed to account for volume detained based on the
physical site characteristics and the ability of the system to intercept that
volume; and
5. Maintenance vacuuming must be performed in accordance with the
approved SOPS for the system. Any infiltration test on the system must be
done in accordance with ASTM C 1781. Surface infiltration testing
locations must be indicated on a site map provided to the City pursuant to
Section 4.16. If testing shows an average infiltration rate in excess of one
hundred inches per hour (100"/hr.), vacuuming may occur at six month .
intervals. In no instance shall a system be vacuumed'less than once each
calendar year.
(c) Detention storage in chambers or pipes.
In addition to the criteria set forth in 4.16.2 (a), the following additional criteria
apply to any storage system using underground chambers and/or pipes:
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1. All chambers or pipes must be placed with a minimum slope of 0.2%;
2. Maintenance access must be provided at point of inflow and point of
outflow into the system. The access must be such that it would allow
human access to inspect the functioning of the storage;
3. All pipes or chambers must be vacuum truck accessible through manholes;
4. An underdrain system is recommended for open bottom chambers if the
soil underlying the storage reservoir does not consist of either Type A or
Type.B soils;
5. The minimum pipe size allowed for detention in pipes is fifteen inches
(15")•
6. The structural system capacity must be designed to support AASHTO
HS20 (fire truck) loading, as well as anticipated lifetime AASHTO 18,000
lb. equivalent single axle loads (ESALs); and
7. The system must be inspected at least once every five (5) years using
remote video technology. A written record of this inspection must be
submitted to the Utilities Executive Director.
Introduced, considered favorably on first reading, and ordered published this 5th day of
January, A.D. 2016, and to be presented for final-passage on the 19th day of January, A.D. 2016.
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may'•• °�� Mayor
ATTEST: �'• SEA� ;'•.��'
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City(Clerk
Passed and adopted on final reading on the 19th day of January, A.D. 2016.
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ATTEST: ••°oLoaao°
City Clerk"
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Account#: FTC-003160
FORT•COLLINS
Invoice Text
NOTICE 1S HEREBY GIVEN that the Fort Collins City Council,on I
STATE OF COLORADO )
ss: AFFIDAVIT OF PUBLICATION
COUNTY OF LARIMER )
Andrew Troncoso ,being duly sworn,deposes and says that said is the legal clerk of the Fort Collins
Coloradoan;that the same is a daily newspaper of general circulation and printed and published in the City of
Fort Collins, in said county and state;that the notice or advertisement,of which the annexed is a true copy,
has been published in said daily newspaper for
1 Day;
that the notice was published in the regular and entire issue of every number of said newspaper during the
period and time of publication of said notice, and in the newspaper proper and not in a supplement thereof;
that the first publication of said notice was contained in the issue of said newspaper on
Sunday,January 24,2016
that the last publication thereof was contained in the issue of said newspaper on
Sunday,January 24,2016
that said Fort Collins Coloradoan has been published continuously and uninterruptedly during the period of at
least six months next prior to the first publication of said notice or advertisement above referred to;that said
newspaper has been admitted to the United States mails as second-class matter under the provisions of the
Act of March 3, 1879, or any amendments thereof, and that said newspaper is a daily newspaper duly
qualified for publishing legal notices and advertisements within the meaning of the laws of the State of
Colorado.
Legal Clerk
Subscribed and sworn to before me,within the County of Larimer,State of Colorado this
Monday,January 25,2016 LADONNAMARYpCgOLORCO
NOTARY PUBLIC-STATEMy Commission expires September 3,2019 My Identlfic fon li 20EVIresSeptenlW
Notary Public
Legal No.0001000903
Delivered to:
CITY OF FC-CLERK-LEGALS
300 LAPORTE AVE Affidavit Prepared
FORT COLLINS,CO 80521 Monday,January 25.2016
10:19 am
Legal Notices
GRANT REVENUE IN
THE GENERAL FUND FOR THE
FORT COLLINS POLICE
SERVICES VICTIM SERVICES UNIT
ORDINANCE NO.004,2016
OF THE COUNCIL OF THE CITY OF
FORT COLLINS
AMENDING CHAPTER 17 OF THE
CODE OF THE CITY OF FORT
COLLINS
TO ESTABLISH AN OFFENSE FOR
UNDERAGE POSSESSION
OR CONSUMPTION OF ETHYL ALCO-
HOL
ORDINANCE NO.005,2016
OF THE COUNCIL OF THE CITY OF
FORT COLLINS
AMENDING CHAPTER 17 OF THE
CODE OF THE COLLINS CITE IF: FORT
TO BRING THE EXISTING UNDER-
AGE CODE OFFENSES FOR POSSES.
MARI-
JUANA RINTONSUMPTION CONFORMITOY WITH
STATE LAW WITH
ORDINANCE NO.006,2016
OF THE COUNCIL OF THE CITY OF
FORT COLLINS
AMENDING CHAPTER 26 OF THE
CODE OF THE CITY OF FORT
COLLINS
AND THE FORT COLLINS
STORMWATER CRITERIA MANUAL
TO MODIFY THE CRITERIA FOR UN-
DERGROUND DETENTION SYSTEMS
ORDINANCE NO. O
007,2016
OF THE COUNCIL F THE CITY OF
FORT COLLINS
AMENDING CHAPTER 26 OF THE
CODE OF THE CITY OF FORT
COLLINS
NOTICE IS HEREBY GIVEN that the AND THE FORT
Fort Collins City Council, TO MODIFY
CRITERIA MANUAL
January 19, 2016, on Tuesday, TO MODIFY PROVISIONS IMPLE.
the following ordinances as ride oind MENTING
reading: LOW IMPACT DEVELOPMENT PRIN.
CIPLES
OFOTHE COUNCIL NANCE NO. lOF 1THE CITY OFORT COLLINSF
OF TDIHE COUNCIL 80F 1THE CITY OF
APPROPRIATING REVENUE IN THE AUTHORIZING THE RELEASE OF A
COMMUNITY CAPITAL FORT COLLINS
IMPROVEMENT FUND FOR INITIA- COVENANT ON
TION OF THE VARIOUS 2016 AP- THE MURPHY CENTER PROPERTY
PROVED PROJECTS, TRANSFER-
RING A PORTION OF THAT APPRO. ORDINANCE NO.009,2016
PRIATION TO THE CAPITAL PROD- OF THE COUNCIL OF THE
CITY
ECTS FUND AND A PORTION OF FORT COLLINS
THEREOF TO THE CULTURAL SERV- DECLARING CERTAIN CITY-OWNED
ICES AND FACILITIES FUND FOR PROPERTY ON
THE ART IN PUBLIC PLACES PRO- RUNNING DEER NATURAL AREA AS
GRAM CONTRIBUTIONS ASSOCIAT- ROAD RIGHT-OF-WAY
ED WITH THE 2016 APPROVED PROJ-
ECTS ORDINANCE NO.010,2016
OF THE COUNCIL OF THE CITY OF
ORDINANCE NO.002,2016 FORT COLLINS
OF THE COUNCIL OF THE CITY OF AMENDING SECTION 15-620 OF THE
FORT COLLINS CODE OF THE CITY OF FORT
APPROPRIATING UNANTICIPATED COLLINS
FROMGRAN THEENUE CONGESTION MITIGq. RELATED TO RETAIL MARIJUANA
TION AND AIR QUALITY ESTABLISHMENTS' HOURS OF OP_
GRANT FOR THE ERATION
FLEX REGIONAL EXTENSION OF The full text of these ordinances can be
ROUTE SERVICE found at
AND AUTHORIZING EXECUTION OF hfip://fcg0v.Cam/IMPLEMENTING INTERGOV or by calling the City Clerk's bloffice tcat
MENTAL AGREEMENTS ERN- 970-221-6515.
CITY MANAGER BY THE
ORDINANCE NO.003,2016 1000903
OF THE COUNCIL OF THE CITY OF Coloratloan
FORT COLLINS Jan 24,2016
APPROPRIATING UNANTICIPATED
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Account#: FTC-003160
CO
FORT-COLLINS
Invoice Text
OAN NOTICE IS HEREBY GIVEN that the Fort Collins City Council,on I
STATE OF COLORADO )
)ss: AFFIDAVIT OF PUBLICATION
COUNTY OF LARIMER )
Andrew Troncoso being duly sworn, deposes and says that said is the legal clerk of the Fort
Collins Coloradoan; that the same is a daily newspaper of general circulation and printed and
published in the City of Fort Collins, in said county and state; that the notice or advertisement, of
which the annexed is a true copy,has been published in said daily newspaper for
I Day;
that the notice was published in the regular and entire issue of every number of said newspaper
during the period and time of publication of said notice, and in the newspaper proper and not in a
supplement thereof; that the first publication of said notice was contained in the issue of said
newspaper on
Sunday,January 10,2016
that the last publication thereof was contained in the issue of said newspaper on
Sunday,January 10,2016
that said Fort Collins Coloradoan has been published continuously and uninterruptedly during the
period of at least six months next prior to the first publication of said notice or advertisement above
referred to; that said newspaper has been admitted to the United States mails as second-class
matter under the provisions of the Act of March 3, 1879, or any amendments thereof; and that said
newspaper is a daily newspaper duly qualified for publishing legal notices and advertisements
within the meaning of the laws of the State of Colorado.
Legal Clerk
Subscribed and sworn to before me,within the County of Larimer,State of Colorado this
Monday,January 11,2016 IADONNAMARYLANIAR
NOTARY PUBLIC-STATE OF COLORADO
My Commission expires September 3,2019 My Idenfikation#201540MM
Expires September 3,2019
Notary Public
Legal No.0000971092
Delivered to:
CITY OF FC-CLERK-LEGALS
300 LAPORTE AVE Affidavit Prepared
FORT COLLINS,CO 80521 Monday,January 11,2016
11:15 am
—your eSo-Source
,W I Legal Notices
STORMWATER CRITERIA MANUAL
TO MODIFY PROVISIONS IMPLE.
for the latest... MENTING
LOW IMPACT DEVELOPMENT PRIN-
CIPLES
Legal NoticesORDINANCE NO.008,2016
OF THE COUNCIL OF THE CITY OF
FORT COLLINS
NOTICE IS HEREBY GIVEN that the AUTHORIZING THE RELEASE OF A
Fort Collins City Council, on Tuesday, COVENANT ON
January 5,2016, passed and adopted the THE MURPHY CENTER PROPERTY
following ordinances on first reading.
These ordinances will be presented for ORDINANCE NO.009,2016
final passage on January 19,2016: OF THE COUNCIL OF THE
ORDINANCE NO.001,2016 CITY OF FORT COLLINS
OF THE COUNCIL OF THE CITY OF PROPERTY GONERTAIN CITY-OWNED
FORT COLLINS RUNNING DEER NATURAL AREA AS
APPROPRIATING REVENUE IN THE ROAD RIGHT-OF-WAY
COMMUNITY CAPITAL
IMPROVEMENT FUND FOR INITIA- ORDINANCE NO.010,2016
TION OF THE VARIOUS 2016 AP- OF THE COUNCIL OF THE CITY PROVED PROJECTS, TRANSFER- FORT COLLINS OF
RING A PORTION OF THAT APPRO- AMENDING SECTION 15-620 OF THE
PRIATION TO THE CAPITAL PROD- CODE OF THE CITY OF FORT
ECTS FUND AND A PORTION COLLINS
THEREOF TO THE CULTURAL SERV- RELATED TO RETAIL MARIJUANA
ICES AND FACILITIES FUND FOR ESTABLISHMENTS' HOURS OF OP-
THE ART IN PUBLIC PLACES PRO- ERATION
GRAM CONTRIBUTIONS ASSOCIAT.
ED WITH THE 2016 APPROVED PROD- The full text of these ordinances can be
ECTS found at http://fcg0v.COM/PublicnoticLs
or by calling the City Clerk's Office at
ORDINANCE NO.002,2016
OF THE COUNCIL OF THE CITY OF 970-227-6515.
FORT COLLINS 971092
APPROPRIATING UNANTICIPATED Coloradoan
GRANT REVENUE Jan 10,2015
FROM THE CONGESTION MITIGA-
TION AND AIR QUALITY
GRANT FOR THE EXTENSION OF
FLEX REGIONAL ROUTE AND AUTHORIZING SERVICE
EXECUTION OF
IMPLEMENTING INTERGOVERN-
MENTAL AGREEMENTS BY THE
CITY MANAGER
ORDINANCE NO.003,2016
OF THE COUNCIL OF THE CITY OF
FORT COLLINS
APPROPRIATING UNANTICIPATED
GRANT REVENUE IN
THE GENERAL FUND FOR THE
FORT COLLINS POLICE
SERVICES VICTIM SERVICES UNIT
ORDINANCE NO.00,1,2016
OF THE COUNCIL OF THE CITY OF
FORT COLLINS
AMENDING CHAPTER 17 OF THE Fin •
CODE OF THE CITY OF FORT
COLLINS
TO ESTABLISH AN OFFENSE FOR
UNDERAGE POSSESSION local
OR CONSUMPTION OF ETHYL ALCO-
HOL
ORDINANCE NO.005,2016
OF THE COUNCIL OF THE CITY OF events
FORT COLLINS
AMENDING CHAPTER 17 OF THE
CODE OF THE CITY OF FORT
COLLINS
TO BRING THE EXISTING UNDER-
AGE CODE OFFENSES FOR POSSES-
SION OR CONSUMPTION OF MARI-
JUANA INTO CONFORMITY WITH
STATE LAW
ORDINANCE NO,006,2016
OF THE COUNCIL OF THE CITY OF YOUR VOICE.
FORT COLLINS ' 1
AMENDING CHAPTER 26 OF THE
CODE OF THE CITY OF FORT
COLLINS LOG ON TODAY
AND THE FORT COLLINS
STORMWATER CRITERIA MANUAL
TO MODIFY THE CRITERIA FOR UN-
DERGROUND DETENTION SYSTEMS
ORDINANCE NO.007,2016
OF THE COUNCIL OF THE CITY OF • • • • i
FORT COLLINS
AMENDING CHAPTER 26 OF THE
CODE OF THE CITY OF FORT
COLLINS
AND THE FORT COLLINS