BOARD01841

• Board Meeting Date: 1/26/2000
• Description: CF Section - New Loans - Weld County Tri-Area Sanitation District - Stormwater Detention Facility
• Board Meetings - Doc Type: Memo

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, .Weld County Tn-Area Sanitation District

Telephone: [phone] P.O. Box 213, Frederick, Colo. 80530
. January 24, 2000

COLORADO WATER. CONSERVATION BOARD
1313 Sherman Street, Room 721
Denver, Colorado 80203

RE: Weld County Tri-Area Conveyance Improvements Project
Request for Funding

Dear Board Members:

We hereby request funding from the Colorado Water Conservation Board in the amount
of one million five hundred thousand dollars ($1,500,000,00) for the design and
construction of a regional stormwater detention facility in the Town of Frederick,
Colorado. This facility will supply much needed flood protection to persons and
properties in the City ofDacono, Town of Frederick, Town of Firestone and
unincorporated areas of Weld County, Colorado. (This area is commonly and jointly
referred to as the "Tri-Area").

.

The proposed project consists of the construction of a regional stormwater detention
facility, This facility will collect surface flows from south and east of the Town of
Frederick and release these flows at a rate significantly less then the historical peak flow
through this area during a 100 year storm event (1940 cfS historic vs. 567 cf~ after
construction). Reduction of the peak flow will require detention storage in the amount of
146 acre-feet and a surface area of approximately 60 acres. More specifically, the project
will require the removal of approximately 438,300 cubic yards of soil. and the
construction of approximately 26,200 cubic yards of embankment and an outlet structure
and re-establishment of ground cover in all disturbed areas.

Our communities were once coal mining centers surrounded by rural farmland. Now the
farmland is quickly developing. Our residentS are a mixture of retired miners, fiumers,
migrant farm workers and young families with single incomes. The average income is
estimated at $20,000 per year.

We have adopted very strict criteria for the building of individual detention facilities
required to detain flows for each new subdivision developed over the past six years, We
require developers to detain their flows and release at a 2-year historical flow rate. This
has helped newly developed areas, but our old town and county properties still sit
dangerously close to disaster.

.

The Tri-Areahas consistently experienced severe drainage and flooding problems from the
south and east sides of the communities due to the run-off of irrigated farmlands as well as
developed areas of the community. All of these communities are partially or completely in
the flood plain as defined by FEMA. In 1985 the three communities received funds from

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