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I. ., .. . . GVWM Flow Protection Plan December 19, 1994 4:02pm DRAFT 1/1 c. 760 cfs through the tlrchard Mesa power canal i. 310 cfs for the power plant ii. 450 cfs for the aMID irrigation right --':'':1 :\ (I)~pumped onto the Orchard MeSlfC.l'fr) (2) 270 cfs used for pumping 3. 630 cfs to the Grand Valley Irrigation Company through their 120 cfs and 540 cfs rights. ~~ /.I),~ ~oc..fs, 4. Assume Plateau Creek flows are zero. Implications of the pre-reallocation assumptions - In order for the above conditions to exist several flows are implied. They are: I. The flow over the Grand Valley project diversion dam must be 320 cfs (1,900 - 1,580 cfs). 2. Flow in the pumping plant and power plant tailrace is 580 cfs (310 (power) + 270 (pumping)) 3. If there is only 320 cfs in the river below the Grand Valley Project diversion dam and GVIC is taking 630 cfs then there must be 310 cfs (630 ' 320) flowing in the check channel. 4. Flow over the GVIC diversion dam is zero. 5. Flow at the beginning of the IS-Mile Reach is 270 cfs. Reallocation assumptions: 6. Flow at the Cameo gage does not change 7. GVWUA is able to reduce their demand by 150 cfs from 700 cfs to 550 cfs through canal improvements and df associated operational changes. Therefore, total diversion requirements at the Grand Valley Project diversion dam are 1,430 cfs (1,580 ' 150) 8. GVIC stays at 630 cfs 9, aMID irrigation and pumping stay at 180 cfs and 270 cfs respectively 10. The irrigation districts (MCID and PID) stay at 120 cfs Results of reallocation: I. Amount of flow going over the Grand Valley Project diversion dam is 470 cfs, 2. The required amount of checking is 160 cfs (GVIC's 630 cfs ' 470 cfs river flows) 3. Flow over the GVIC diversion dam is zero 4, Flow at the beginning of the IS-Mile Reach equals 420 cfst z. 70 + I >,,) 22