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Gunnison River / Aspinall Unit Temperature Analysis -Phase I Page 2 solution was desired, it is not immediately clear which reservoir or reservoirs would need to be modified with such structures. 109° 10B' - 107.• ~T~.-.._. _ ~.__._._._.-----..._. _._._. r TW G~gND J,jer~.._. -I'mo' < V ~` Plefc°J - F~~ Lome r9(~ Cameo ((((((~~~~~~ • y ~. ~ ~4eal 4 ~O i ~'L~.! Fruits ~, -~'a¢ crenn ~~~ GRAND MESA ~~ ;~ U~Yp 091p500 Jwfcfion / (~ ~ n'*f ~ '9/~ Whifewefw ~ rfl,~aue <?~ \'nsi ~,>-~ ,- w ..C6'~ V ~~1,,#Peafie ~ Hotchkiss ~ ~ 09144250 1.° f ~_7DD R~ ~ 1 ,, ~ -~ Lesser F°rl~ ~~ngue i ~~~- ~ S~Ilcer ~.SmifL .~''. p ~'K U 09T 9500 Lakc `-~~~ ~ t`J~C `° ~ n~o n ~/ 5 Ra m v/~fh kdt E~a W 3 \ .~.{~G ~4 OMp9ti ~ C+& ~' w .w.\y ~~e095~9000 dlueeMem i5J1~ ~a J. CIVf1eI Ne IRer 5,g C9l(` Eps A U Mowrose ~,y; ~.R sc~Wlr S M ow Po°u I~ A l0. o G~ ` \ G4Jnn`` ~-.-JT'-- it cwonf /flclg°aV c4a 3' Rescr°w ~~.~-. -- Hwgwsy .~ 5~ ~pZi F...f fu H~wf ^~.4 K 4` - t~..i ~ ~ OENVEft fo ~' ~ `sq b - Sluoy 1 \~ 'V \ CAuaY t] M %~ COLORADO O e ~~rq~ _ k t ~__.-.-_..__...-_ tie __1.__...._~._._..__,.....__..........._._..__~-_ -...1~ ~tANAT1ON 091S2c~00 ~ USG>S ST.-ATION P,IVCI N110.1kSE..R tl }0 20 70 40 MfLES F.____~,__1_.1_____T1.. _~.-J____...._J 0 10 t!i 30 s0 i(IkOMETEH5 Figure 1. Gunnison River Basin (adapted from Butler, 2000). 7eyl°r Vark Rrsafwlr Additionally, before any decision can be made to modify the system for purposes of temperature management, a whole host of other physical and institutional constraints must be taken into consideration. These constraints may include, but are not limited to, factors such as: water rights administration, hydropower generation, recreational fisheries (river and reservoir), reservoir recreation, flood control, and interstate and international compacts. This report is structured as follows. The next subsection provides an overview of the project objectives. Section 2 addresses the data collection effort, and summary tables of data are provided in the Appendix. Section 3 provides and overview of the reservoir and river analyses, which are discussed in detail in Sections 4 and 5, respectively. Section 6 addresses a wide range of physical and institutional constraints on reservoir and river operations that may potentially limit the ability to control downstream temperatures. Section 7 summarizes the results of the analyses, and provides some broad recommendations to the members of the Recovery Program. Hydrosphere Resource Consultants