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1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />P&M holds two separate rights for the Three Forks Reservoir which is located on the <br />Wyoming-Colorado stateline. The Colorado decrees for Three Forks and Sheep Mountain <br />Reservoirs, dated June 5, 1972, each call for 75,000 AF of storage. The Wyoming permit <br />for Three Forks Reservoir, dated June 20, 1972, is for a dam at the same location as the <br />Colorado Three Forks Reservoir decree except with a storage amount of 22,865 AF. <br />According to P&M, their future plans are to develop a single large dam on the <br />Little Snake River with a total capacity of 172,865 AF at the common site of its Wyoming <br />Three Forks Permit and Colorado Three Forks Decree to embody the full entitlement of <br />these rights as well as the Sheep Mountain Reservoir Decree water. Therefore, this study <br />evaluated the impacts of a consolidated Three Forks Reservoir with 172,865 AF of storage. <br />For this study, it was assumed that all components of the project are in place at <br />the beginning of the study period. The main project components modeled are shown on <br />a general schematic diagram (See Figure 5, page 23). <br />Table 5 summarizes the Three Forks Project input data used in the WIRSOS <br />modeling. Of the total storage capacity, 10 percent (17,300 AF) was assumed for study <br />purposes to be dead or inactive storage and the remaining 155,565 AF as active storage. <br />This assumption was made for study purposes and was not based on a biological or other <br />environmental constraint evaluation. An area-capacity curve for the consolidated Three <br />Forks Reservoir has been developed by P&M (see Appendix C) and was incorporated into <br />the WIRSOS input. <br />31