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Chambers Lake (Structure ID 0303679) <br />Chambers Lake is located on Joe Wright Creek, r <br />approximately 1 mile downstream from the `~ .1, y~ <br />outlet of Joe Wright Reservoir, in the Roosevelt `~ " .-.__ ~ ~~ <br />=. ~ -. s - <br />National Forest in Larimer County, close to the ~ ~` = ~~ ~ a <br />divide between the North Platte drainage and ~ ~. , ~ '-'~ ~, <br />I~.. , - <br />the South Platte drainage. Chambers Lake is -`~ - ~ , <br />one of two mountain reservoirs owned by ~ ~ ~ ~ ~ ~ '~ - ~~' <br />•_ s _ ~ ~+~ <br />WSSC that provide storage above the '~~~ -+ - ~.._~ ~ ~~ ~" <br />Company's headgate on the Cache la Poudre `-¢~'F~ - .~~ ~~'~.~' <br />River for use in its main supply canal, Larimer ~, .. ` ~ ~ , r _; <br />County Canal. Water is conveyed to Chambers ' ~ ~~`'" ~ ' d"-~ ~~ ' ~ ~ ~. ~:- w <br />R"°,n ~'. <br />Lake through contributing creeks in the Cache ~` ~` ~~~ ~ ~ ~~~ ~~ ~~~ <br />la Poudre basin and through transmountain Chambers Lake c.1912 <br />diversions. Cache la Poudre basin contributing creeks include Joe Wright Creek, Trap Creek, <br />and Fall Creek. Transmountain diversions which contribute water to Chambers Lake include <br />Cameron Pass Ditch and Michigan Ditch via Joe Wright Creek and upstream Joe Wright <br />Reservoir, and Skyline Ditch, which discharges directly into Chambers Lake. Chambers Lake <br />discharges into Joe Wright Creek, which is tributary to the Cache la Poudre River within <br />approximately three miles. The location of Chambers Lake is shown on Figure 1. <br />The original Chambers Lake dam was built in 1890. In 1891, one year after construction of <br />Chambers Lake was completed, the original earthen dam failed. Anew dam was built, only to <br />fail in the large flood of 1904. Anew earth-fill dam was subsequently built. In 1990, the State <br />Engineer placed a filling restriction of Chambers Lake until the dam was rehabilitated. A slurry <br />trench was completed near the dam within the last few years to reduce seepage loss from the <br />reservoir. Water stored in Chambers Lake has historically been used for irrigation. <br />Capacity: <br />• Total Storage: 8,824 acre-feet plus unknown amount of dead storage. <br />• Active Storage: 8,824 acre-feet. <br />• Dead Storage: Unknown. <br />• Outlet Capacity: 1,700 cfs <br />• Spillway Capacity: 54,399 cfs <br />Area/Capacity Data: Reservoir gage height and cumulative capacity information are shown in <br />Table 2. There is an unknown amount of dead storage in Chambers Lake. The capacity <br />data presented in Table 2 does not include any dead storage. <br />Measurement Device: Storage levels in Chambers Lake are measured using a staff gage, which <br />is read daily in the summer and monthly in the winter by a WSSC employee and reported <br />to the District 3 Water Commissioner. Evaporative losses are not charged to Chambers <br />Lake. <br />Reservoir Seepage Information: No known studies have been conducted to quantify seepage <br />losses from Chambers Lake. <br />WaterSupply&Storage Memo.doc <br />8 of 21 <br />