WSP12310 - Laserfiche WebLink

Home Browse Search

. ~ . .. .. ("'1; 4. ..".. t- . .... . , ,. ~. 5. . . 6. Reservoir ftflows were adjusted (rttuced) In accord with anticipated future development in the Yampa Basin above the two reservoirs. Potential depletions were established at 100,000 af annually. The anticipated consumptive use was distri~uted over the year based upon a mix of potential agricul'tural, municipal and industrial uses. Available reservoir inflows were adjusted (reduced) to ~eet the historic Maybell Canal demand on the Yampa River below Juniper Reservoir..- Minimum streamflow requirements were established below the reservoirs. A minimum fishery bypass release of 200 cfs, or- natural streamflow, whichever is less, was maintained below both reservoirs at all times. If incoming flows were.less than 200 cfs, the reservoirs were prohibited from storing water. Releases 'were made from storage when necessary to sustain the minimum flow. . . 7. A minimum streamflow of ~.cfs August through April and 1,80~fs May through July was maintained on the Yampa below ~confluence with the Little Snake River. Xf flows were less than these amounts, sufficient releases were mad~ from . reservoir storage to provide the required flo\-Is. These minimum flow levels are primarily for fishery and recreation (boating) purposes. .. . 8. The reservoir's annual y~eld was released to a hypothetical - downstream market on a sustained year-round basis. No reductions were made for transit losses.to a delivery point. Transit losses must be determ.ined on a case by case basis, depending upon the ultim~te market location. 9. Water supplies allocated to satisfy compact requirements included reservoir releases to meet the minimug streamflow '. levels (outlined above) and reservoir spillage when their total capacities were exceeded. . Studv Results Scenario 1 - Compact Requirement - Must provide 1o,"'er basin States an aggregate of 5 million af for any 10 consecutive year period (av':!rage of 500,000 af/year). 0' A safe yield of 360,000 af (sustained release of 497 cfs) of "ater can be developed at the reservoir si tes while still meeting Compact requirements. Water supplies available for Compact requirements reached a 10'"' of 5,001,000 af for the 10 year period preceding 1968. Any water storage in excess of 360,000 af ,",ould have violated the 5,000,000 af Compact requirement during this time period. Annual Compact deliveries reached a 10'"' of 1 ~9,663 af, in 1954 and a high of 1,076,492 af in 1971.