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TCID Water Supply Conditions

Updated Dec. 7, 2008
Submitted by Truckee-Carson Irrigation District to Lahontan Valley News

As of December 7, storage in Lahontan Reservoir was 27,352 acre-feet. Storage in Lahontan is expected to increase to about 37,200 acre-feet by the end of December.

The maximum Truckee Canal diversion allowed by the Bureau of Reclamation is 350 cfs, which is more than what is available of the Floriston Rates water that arrives at Derby Dam. For December the reduced Floriston Rate is 300 cfs, because Lake Tahoe is below elevation 6225.25.

On November 22 the Truckee Meadows Water Authority requested a further reduction in the Floriston Rates to 160 cfs pursuant to a supposedly never before used provision in the Truckee River Agreement. This provision allows Sierra Pacific to reduce Reduced Floriston Rates during the non-irrigation season not to exceed 6,000 acre-feet since the signing of the Truckee River Agreement in 1935. The Federal Water Master is not aware of this provision being used before.

The reasoning given by TMWA was that Floriston Rate water in Boca would be exhausted by about December 8. This change would extend the release of Floriston Rate water until about January 8.

Later, on December 5, TMWA requested Reduced Floriston Rates be increased from 160 cfs to 200 cfs. The reason given for this was to avoid increasing releases when the 6,000 acre-feet was reached and then reducing the releases after all Floriston Rates was exhausted.

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