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<br />\ " <br /> <br />. <br /> <br />. <br /> <br />GVWM Flow Protection Plan <br /> <br />December 19, 1994 <br />4:02pm <br /> <br />DRAFT <br /> <br />Administrative Method <br /> <br />Under the proposed administrative method, when a GMR HUP surplus has been identified GMR <br />releases are not reduced to correspond to the reduction in GVWUA demand, but an amount <br />equal to the demand reduction (conservation) is reallocated for delivery to the Grand Valley <br />Power Plant. This increment of GMR water conserved is diverted at the Grand Valley Project <br />diversion dam, carried through the Orchard Mesa Power Canal, run through the Grand Valley <br />Power Plant, and allowed to return to the Colo!'lj};> ~ver without being checked back. __ r/vz- <br />aHtellRt 9f "natural" flow equal to the reallocationisaliowed to bypass the Grand Valley Project <br />diversion dam and flow down the river channel to be diverted by the Grand Valley Irrigation <br />Company. The Grand Valley Power Plant simply reduces the amount of water checked and <br />increases the flow to the Colorado River via the tailrace by an amount equal to the bypass at the <br />Grand Valley Project diversion dam and the reallocation releases. <br /> <br />The result of this method is that the Grand Valley Power Plant does not have to check as much, <br />fish are able to use the GMR surplus downstream from the Grand Valley Project diversion dam <br />(which could also be used for a fish passage structure at the Grand Valley Project diversion dam <br />and the Price/Stubb diversion dam), and more water enters the IS-Mile Reach through the Grand <br />Valley Power Plant tailrace, Since there could be an ad__al 90 cfs available to the Grand <br />valley Power Plant, it would be possible to deliver up to 672 cfs (3~ cfs which is the existing <br />power plant flow,f + 272 cfs from the Orchard Mesa Pumping Plant + 90 cfs available due to <br />conservation which would be available). <br /> <br />,;;-';3-:- <br />1(; <br />.. 7 ~'" <br />G <br /> <br />Sample Reallocation Scenario <br /> <br />Water distribution patterns before reallocation - In this example reallocation all of the <br />water running through the power plant is being checked. This also means that there are 120 cfs <br />of GMR direct releases for GVIC being made. Figure 1 is a schematic of the Cameo group <br />diversion system with the reallocation scenario numbers indicated. The non-inclosed numbers <br />are the pre-reallocation numbers where the circled numbers are the reallocated flows. <br /> <br />Pre-reallocation assumptions: <br />1. Cameo gage is at 1,900 cfs gage flow which includes 400 cfs of direct GMR <br />releases, This means that about 280 cfs of direct releases are being made to the <br />730 cfs right and 120 cfs of direct releases to the GVIC's junior water right. <br />2. 1,580 cfs is being diverted at the Grand Valley Project diversion dam <br />a. 700 cfs for the 730 cfs right <br />b. 120 cfs for the irrigation districts <br /> <br />20 <br />