BOARD01008

• Board Meeting Date: 1/27/2004
• Description: CWCB Director's Report
• Board Meetings - Doc Type: Memo

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been reviewed and approved by the State Engineer's Office. Bids were received to construct the planned
improvements, but were outside the project budget. The Ditch Company is currently obtaining a new design
engineer to redesign certain aspects of the project in an attempt to reduce the overall cost of the job. The projectis
currently on-hold pending the outcome of the Ditch Company's redesign of the reservoir.

2. Lake Arrowhead Water Association - Lake Arrowhead Reservoir Rehabilitation
Authorization: Small Project Loan Account County: Weld
Water Source: Ashcroft Draw Project Yield: 200 ac.ft.
Tenns of Loan: $300,000 @4.25%for30 years Project Type: Dam Rehabilitation

Lake Arrowhead Reservoir is located 2 miles southwest of Greeley on Ashcroft Draw, which is a tributary to the Souili
Platte River. The existing Class 3 dam, 30 feet high, was constructed in 1963 with a 200 acre-foot capacity. On August
10,2002 a large sinkhole developed on the downstream slope ofilie dam, due to failure of the outlet pipe. The Water
Association has retained the services of Boyle Engineering to complete the remaining design work. Construction is
scheduled to commence by the spring of2004.

3. Pine River - Bavfield Ditch Companv - Siphon Replacement Proiect
Authorization: Construction Fund County: La Plata
Water Source: Vallecito Reservoir Project Yield: 8,866 ac.ft.
Tenns of Loan: $267,000 @2.75% for 30 years Project Type: Siphon Replacement

PREDe provides irrigation water to a 2,596~acre service area in La Plata COUIlty, generally south of the Town of
Bayfield. The Pille River Bayfield Ditch is a lateral extending off of the Schroder Ditch and is a carrier ditch for
shareholders owning Pine RiV"et. w-ate: rights '4n.d Phle Rivelluigation District water shares rv allecito Reservoir). The
PREDC headgate is located east of the Town of Bay field, above Beaver Creek. From the headgate, the ditch flows
through a concrete flume and into the Beaver Creek siphon, a 32-mch diameter steel pipe siphon, 2300 feet in length,
dropping an estimated 100 feet in elevation, as it runs under Beaver Creek. The current siphon was built in 1955-1957,
with a design life of 30 years, and is in deteriorated condition. The steel has oxidized to the point where the pipe walls
have thinned in many places heyond repair. A new 30-inch PVC pipe, designed by the Durango NRCS Office to carry
37 cfs, will replace the existing siphon. NRCS is scheduled to have the design complete by February of 2004 with
construction to follow in Marchi April of 2004.

4. Willow Heights Irrigation Companv - Dual Water System
Authorization: Construction Fund County: Delta
Water Source: Leroux Creek Project Yield: 257 ac.ft.
Tenns of Loan: $115,000 @3.75% for 30 years Project Type: Dual Water System

WHIC owns and operates an existing piped irrigation system located in the Willow Heights Subdivision and Duke
Hill community in the Town of Hotchkiss. The system was constructed in 1976, and water is obtained through the
Duke Ditch, which diverts water from Leroux Creek. Water is supplied to about 95 residential lots and a Town
park. The total irrigated area is about 60 acres, and primarily use is to irrigate lawns and gardens. The system
consists of a headgate, approximately 6000 lineal feet of main distribution piping (10", 8" and 6"), and
approximately 3000 feet of lateral piping. The original piping was a lightweight plastic pipe, and improper
backfilling resulted in crushed pipes in some areas, and significant plugging problems. As a result ofthe blockages, .
and reduced flow due to mineral deposits, the overall flow capacity is less than 1/3 of the original. The project
involves installing all new distribution lines and lateral tap lines, along with cleanouts and isolation valves. The new
pipes will be installed over the top of the existing system but at a standard depth of22 - 30". The piping will be
heavier PVC, located above the existing pipe, but offset several feet to eliminate sewer manhole conflicts. Design
is anticipated to be complete by December of 2003 with construction to follow in April of 2004.

5. Larimer County - Drv Creek Multi-Objective Floodplain Proiect.
Authorization: SB 96-152, Amended SB 97-8 County: Larimer - N. of Ft. Collins
Water Source: Dry Creek Basin Project Yield: N/A
Terms of Loan: $920,000 @4.25% for 30-years 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 rangeland and irrigated pastures. The
lower portion of the basin within the city limits of Fort Collins consists of commercial, 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 IOO-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