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".f " 4 ~;l ~ ", ..,-~' . ~ t. . -<......'.l. ~- -, " , . ..- ".:',:,r" ':',';., . '.- ",..., . CONSTRUCTION SCHEDULE The following construction progresses: utilities Relocation Design and Specifications Ridges Basin Construction Construction of Distribution Facilities First Delivery of Project Water schedule has been prepared in anticipation of a 1990 start and is subject to revision as the work 1990 1990 - 1998 1993 - 1996 1994 - 1999 About 2000 PROJECT OPERATIONS X t. ~ Duranao PumDina Plant :.( The amount of water pumped at the Durango Pumping Plant would be determined by: ( 1) the f low in the Animas River, ( 2 ) the downstream nonproject water rights, (3) the project New Mexico M&I demand, (4) the minimum bypass to satisfy established in stream flow requirement (225 and 125 cfs), (5) the capacity of the pumping plant (430 cfs), and (6) the amount of water in Ridges 'Basin Reservoir. ;7-~ The amount pumped would be equal to the capacity of the pumping plant except when low river flows above the plant in combination with downstream demands, including project New Mexico M&I water, or the minimum bypass to maintain the aquatic ecosystem would cause the pumping to be restricted. The minimum bypass would be 225 cfs from April through September and 125 cfs from October through March. These values were based on minimum streamflow criteria developed prior to the publishing of the Definite Plan Report (1979). pumping would also be curtailed when Ridges Basin Reservoir is full. ; , "~ ft \-"~ ~~~ ~!",~ t~~ With the project, 100 percent of the following water supplies on the Animas River would be provided: (1) downstream senior rights on the Animas River, and (2) project municipal and industrial requirements using a 49-year period of simulated operation. On the average the Durango Pumping Plant would pump 133,300 acre-feet of water annually from the Animas River into Ridges Basin Reservoir. For the period of the operation study, the amount pumped varied from a low of 56,000 acre-feet to a high of 199,500 acre-feet. As would be expected, the greatest diversions occur in wet years. Ridaes Basin Reservoir and PumDina Plant ~~ .",r. ,::'.il! d On the average 123,800 acre-feet of water is pumped annually into the Dry Side Canal and thereby into the La Plata River drainage. The canal crosses the La Plata River and heads westerly across the drainage, nearly reaching the Mancos River. The difference between the 133,300 acre-feet pumped to the reservoir and the 123,800 acre- 3