HomeMy WebLinkAbout20082679.tiff t.Gzt, ,
CHAPTER 8
Public Works
ARTICLE XI
Storm Drainage Criteria
Division I General Provisions
Sec. 8-11-30. Weld County Addendum to Text of the Urban Storm Drainage Criteria—
Volume 1.
The criteria adopted herein are hereby modified as follows:
Chapter 1 —Drainage Policy
17. Add the following to Section 4.5, Detention and Retention Storage:
"Except as set forth below,the Policy of Weld County shall be to require regional and/or on-site
detention for all future developments. Temporary or interim detention/retention may be required
if the downstream regional facilities have not yet been constructed per the applicable Master Plan.
Stormwater retention facilities are normally not allowed in Weld County,but will be considered
for special circumstances. It is Weld County policy to require detention of runoff from the 100-
year storm falling on the developed site and release of the detained water at the rate of the runoff
of the 5-year storm falling on the undeveloped site. Detention releases based on soil types are not
approved for Weld County. Proposed developments must provide for safe conveyance of off-site
flows through the proposed development site. Off-site flows may be routed through or around the
proposed detention facilities. Positive drainage must be provided. Weld County will not approve
any detention or retention pond that does not drain in less than 72 hours, causes injury to water
rights, or is in violation of state or federal law. Upon evaluation, improvements may be necessary
to downstream capacity.
No stormwater detention shall be required for rural residential developments of nine(9)lots or
fewer,where lot sizes exceed five(5)acres per lot,and: 1)downstream roadway criteria are not
exceeded(6-inches water depth on road for the 10-year storm), and 2)the total post-development
imperviousness for the rural residential development does not exceed ten percent(10%),
assuming that all internal roads and driveways are paved(or will eventually be paved).
No stormwater detention shall be required for redevelopment of commercial and industrial sites
where the change of use does not increase the imperviousness of the site; however,water quality
capture shall be required."
Sec. 8-11-110. Sketch plan drainage report.
The purpose of the sketch plan drainage report, submitted at the sketch plan review stage of the
planning review process is to identify and define conceptual solutions to storm drainage problems
which may occur on site and off site as a result of the proposed development. In addition,those
problems that exist on site prior to development must be addressed during the conceptual phase.
For proposed projects that will have rural residential levels of development,the Department of
Public Works will review the site, surroundings and proposed improvements and advise the
applicant as to what additional information and/or engineering design may be required for change
of zone and final plat approvals. The term,"rural residential levels of development,"is defined
CEO :QG6lb'- 9
2008-2679
as residential development with fewer than nine(9) lots and lot sizes less than five(5)acres. No
sketch plan drainage report shall be required for recorded exemptions.
(Rest of Sec. 8-11-110 is the same.)
Esther Gesick
From: David Bauer
Sent: Tuesday, July 29, 2008 10:58 AM
To: Esther Gesick
Cc: Bruce Barker; Pat Persichino; Don Dunker; Donald Carroll; David Snyder; Clayton D. Kimmi
Subject: RE: Drainage Code revision
Attachments: Ordinance2008-9 1 stRead.doc
Ordinance2008-9
1stRead.doc(4...
Attached is the corrected version.
David Bauer
Weld County Public Works
Original Message
From: Esther Gesick
Sent: Tuesday, July 29, 2008 9:31 AM
To: Anne Pennington; Araceli Curiel; Barb Connolly; Bethany Salzman; Bill Jackson; Brad
Mueller; Bruce Barker; Chris Gathman; Chris Woodruff; Cyndy Giauque; Darrell Gesick; Dave
Bressler; David Bauer; David Snyder; Dean Dreher; Deb Blandin-Surbeck; Diane Beckman; Don
Dunker; Donald Carroll; Donita May; Doug Rademacher; Eva Jewell; Francie Collins; Jackie
Weimer; Jacqueline Hatch; Josh Holbrook; Judy Griego; Judy Nero; Karla Ford; Kathy Baxley;
Kim Ogle; Kristine Ranslem; Lauren Light; Leon Sievers; Linda Sandin; Marcia Walters;
Marjorie Caudill; Mark Wallace; Mary Figueroa; Michelle Martin; Mike Bedell; Mona
Weidenkeller; Monica Mika; Pam Smith; Pamela Armfield; Pat Persichino; Richard Hastings;
Rose Everett; Roy Rudisill; Sharon Behrens; Steve Moreno; Sue Elton; Sue Quick; Susan
Talmadge; Talya DeAngelis; Thomas Honn; Tina Booton; Tony Groeger; Trevor Jiricek; Trina
Rioux; Troy Swain; Vicky Sprague; Wayne Howard; Wendi Inloes; Zelma Wahl
Subject: Agenda for Wednesday, July 30, 2008
Have a great day!
Esther E. Gesick
Deputy Clerk to the Board
915 10th Street
Greeley, CO 80631
(970)356-4000 X4226
(970)352-0242 (fax)
1
Amend Sec. 8-11 -110. Sketch plan drainage report.
The purpose of the sketch plan drainage report, submitted at the sketch plan
review stage of the planning review process is to identify and define conceptual solutions
to storm drainage problems which may occur on site and off site as a result of the
proposed development. In addition, those problems that exist on site prior to
development must be addressed during the conceptual phase. For proposed projects
that will have rural residential levels of development, the Department of Public Works will
review the site, surroundings and proposed improvements and advise the applicant as to
what additional information and/or engineering design may be required for change of
zone and final plat approvals. The term , "rural residential levels of development," is
defined as residential development with fewer than nine (9) lots and lot sizes greater
than five (5) acres. No sketch plan drainage report shall be required for recorded
exemptions.
Remainder of Section - No change.
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