FLOOD10420

• County: Adams
• County: Broomfield
• County: Weld
• Community: Broomfield, Westminster and Thornton
• Stream Name: Lower Big Dry Creek
• Title: Lower Big Dry Creek Hydrology Study
• Date: 6/1/2005
• Prepared For: Big Dry Creek Watershed Association
• Prepared By: Wright Water Engineers, Inc.
• Floodplain - Doc Type: Floodplain Report/Masterplan

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Lower Big Dry q:reek Hydrologic Study

6.10 Water Commissioner

Bob Stahl, District 2 water commissioner, was interviewed regarding his observations of flow
conditions in Big Dry Creek. He communicdted that at this time, most diversion structures seem
to be capable of handling the flows presen~ in the creek. The pattern of diversions has not
changed significantly. He further noted that ~evera1 ditches (e.g., Brighton, Brantner and Lupton
Bottoms) spill stormwater into Big Dry CreeJ (personal Communication with Bob Stahl, District
2 Water Commissioner, 2005).

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7.0 CASE STUDIES AND LITERATURE REVIEW

The problems experienced in the lower Big Jry Creek Watersbed are not unique, and the impacts
of urbanization are well documented in thb literature. Study sponsors expressed interest in
assessing whether the stormwater managemelt practices in place in Big Dry Creek are consistent
with the current state of the practice for stodnwater management, identifying a few case studies
with similarities to Big Dry Creek, and idJntifying emerging strategies to deal with dif1icult
stormwater management issues similar to thdse on Big Dry Creek. The findings of the literature
. . d d' h I.
reVIew are summanze accor mg to t ese tORIes:

. Current state of the practice

. Case studies of interest

. Emerging stormwater management stliategies.

7.1 Current State of the Practice

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The current state of the practice was assessed by reviewing stormwater management standards in
place along the Front Range in Coloradb, reviewing measures in place in several key
communities nationally, and reviewing text b~ leading experts and professional organizations.
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7.1.1 Urban Drainaqe and Flood Control District Storm Drainage Criteria
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UDFCD sets the regional standard for drainlge planning and management in the metro Denver
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area. Additionally, many national storm drainage criteria manuals have been modeled and
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971-179.092 Wright Water Engineers, Inc. Pelge 49
June 2005 I
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