BOARD02567

• Board Meeting Date: 1/24/2001
• Description: CWCB Director's Report
• Board Meetings - Doc Type: Memo

10. El Paso Countv Water Authoritv- Countv Water Master Plan

Authorization: Grant
Water Source: n/a
Terms of Loan: $200,000

County: El Paso
Project Yield: n/a
Project Type: Water Master Plan

This project is a five year program of technical studies aimed at the development of a long range,
countywide water master plan. The purpose of the plan is to develop water resources, systems, and facilities in
whole or in part for the benefit of the Authority members and their inhabitants, and other residents of the
county, now and into the future. The County is currently focusing on eight study areas; El Paso County water
resources, potential water import projects, optimum county water distribution infrastructure, water plan for
private well owners, water reuse projects, synergistic projects with Colorado Springs utilities, other studies, and
an overall project master plan summary. The first two areas have been completed and the Water Authority is
currently working in the area of optimum county water distribution infrastructures.

l1. Weld Countv Tri-Area Santitation District - Regional Detention Pond

Authorization: HB 00-14l9
Water Source: n/a
Terms of Loan: $l,500,OOO @ 5.00% for 30-years

County: Weld - S. of Frederick
Project Yield: n/a
Project Type: Regional Detention Pond

The communities ofDacono, Frederick, Evanston, and Firestone have consistently experienced flooding
problems due to storm runoff from irrigated framlands and adjacent developments. These communities have
suffered many recorded flooding events, dating back to 1957, which caused in excess of $300,000 in flood
related damages. With significant population growth occuring within the District, the District cooperated in the
development of the 1-25 Corridor Master Drainage Plan. The master drainage plan recommended that the
existing detention pond located on the south side of Frederick be enlarged to a regional detention pond, to
mitigate future flood damage to the surrounding communities. The regional detention pond would encompass
over 60 acres ofland and store approximately l46 acre-feet of storm water during a 100-year event. The design
is being completed by the Sears-Brown Group in 2000, with construction tentatively scheduled to commence in
the February 2001.

12. Larimer Countv - Dry Creek Multi-Obiective Floodplain Proiect.

Authorization: SB 96-152, Amended SB 97-8
Water Source: Dry Creek Basin
Terms of Loan: $920,000 @4.25% for 30-years

County: Larimer - N. of Ft. Collins
Project Yield: N/A
Project Type: Flood Mitigation

Dry Creek is located north of Fort Collins, with a majority of its 75 square miles of drainage basin area
located within Larimer County. The uppermost portion of the basin consists of range land and irrigated
pastures. The lower portion of the basin within the city limits of Fort Collins consists of commerical,
industrial, and residential development. Over the years the lower 2/3 of the Dry Creek floodplain corridor has
almost been completely eliminated due to development. The lOO-year runoff for Dry Creek is 5,022 cfs. The
intent of the project is to control floodwaters in the upper basin area by means of detention facilities to reduce
the peak discharge from 5022 cfs to 500 cfs above the Weld Canal, utilize a specific reach of the Weld Canal to
transport the 500 cfs, and construct approximately 1.5 miles of new open channel from the Weld Canal to a
designated point along Dry Creek, located downstream of existing development. The proposed improvements
would remove over 800 structures out of the Dry Creek regulatory lOO-year floodplain. The project is

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