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The Dry Elk Valley lateral carries water from the Grass V alley Canal to both full and supplemental service lands in Dry Elk Valley. Under project operation, Harvey Gap Reservoir, which previously filled and emptied each year, now stores and regulates water for a longer irrigation season. The Silt Pumping Plant, with a capacity of 36 cubic feet per second, is located near the Colorado River about 2 miles east of the Town of Silt. The Colorado River diversion for the pumping plant was constructed along with the other project facilities in the mid-1960's. The pumping plant was designed to provide irrigation water (both supplemental and full service) to the lower reaches of Silt Mesa. Water is diverted from the Colorado River using a diversion structure built in March, 2000. The 7.6 mile-long Silt Pump Canal extends northwest from the pumping plant discharge line, carrying irrigation water to land on the lower part of Silt Mesa. The pumped water is used as a supplemental supply or as a replacement supply, for project land formerly irrigated with water from Harvey Gap, and a small portion, with Colorado River water pumped from the Cactus Valley Ditch. Rifle Gap Dam is located on Rifle Creek and 5.5 miles north of Rifle, Colorado, at a point where the creek cuts through the Grand Hogback. The dam and reservoir was built by the Bureau of Reclamation in 1967 to provide supplemental irrigation water to the existing Farmer's Irrigation Company (FICo) and project lands on Davie Mesa. Existing canals and laterals were used and rehabilitated where necessary. Recreation facilities have been constructed at Rifle Gap Reservoir and some facilities are available at Harvey Gap Reservoir. Rifle Gap Dam is a zoned earthfill structure with a height of 157 feet, a crest length of 1,450 feet, and a volume of 1,768,000 cubic yards of material. The spillway consists of a short approach channel, concrete inlet walls, concrete crest structure, and concrete chute and stilling basin. The outlet works consists of a concrete intake structure and a 6- foot upstream circular tunnel at the gate chamber with two 2.25 foot-square high-pressure gates. The outlet diverts to a downstream 6-foot-diameter flat-bottom free-flow tunnel that discharges into the spillway stilling basin. A 7-foot-diameter horseshoe tunnel branches from the gate chamber and contains a 30-inch steel pipe that conveys water to a concrete pipe that in turn discharges into Davie Ditch. 4