The Colofado River

1 1 A :s' AT U R A L ~~ E N A C E B E C 0 ~~ E S A N AT I 0 N +L R E S 0 U R C E' ' ; A Co1~prehensive Report ·on the Development of· the ff/ater Resources of the Colorado River Basin/or Irrigation, Power Production, and Other Beneficial Uses in Arizona, California, Colorado,JVevada,New Mexico, Utah, and Wyoming

By THE UNITED STATES DEPARTME~T OF THE INTERIOR J. A. Krug, Secretary

SPOSSORED BY AND PREPARED USDER THE GENERAL SUPERVISION OF · THE BUREAU OF RECLAMATION

~Iichael W. Stra~s, Commissioner

E. A. ~loritz., Director, Region 3; E. 0. larson, Director, Region 4

MARCH 1946 liS edition of THE COLORADO RIVER is trsued in advance rf its publication as a CongreSJional T ·1ocumeut in respfJme to an urgent public demand for copies, m.Jny oft/u?m for rf!icial re'viev.:. The document has not been fr,msmitted /f) the C':lngress f(Jr consideration, nor ·will it be, unH! certain States and Federal ojficials who are no·w t·evie"..dng it l1aW added their •u.:ritten comments to the text that ,1ppears here. TVhen tl1e report i's publisheJ as a Con­ gres.rional Document these commo1ts 'l.vi/1 be included,. or. will appear in a supplement:Jry "Jolume. Contents

p .. ge PliO PO~ ED REPORT OF THE SECRETARY OF THE Explorations .. , 46 I~"TERIOR : · S<>ttlement . 48 Population. 49 I e, wr ofJut!~"O, 19~6, from the Acting Conunissioner, Chapter Ill. DMDING IHE wATER 53 I>.trc'JU of Reclamation . . • ...... , 3 Virgin Conditions • ...... 55 REGI0~.\.1 DIRECTORS' REPORT Early Development of the River. . 56 Sununary of Conditions in the Early 1920" s 59 ~,1 'P (,f Co!0rado River Basin . Facing 9 Betv>een the Upper and Lower Basins" 59 -:;,·cpe Purpose . . . . ·. a;~d 9 Between United States and Mexico 66 .\uthoritl' for the R~:port. . . 9 Cooperation and Acknowledgments 9 Chaptrr IV. DEn:LOPJ:XG THE BASIN 69 Dc·scription of Area . , 10 Upper Basin • ...... 72 Problems of the Basin 11 Labor Force ...... 72 \\.at.:r .Supplr ... 12 Land Ownership and Use 73 Ili\"Jst!'n uf \Vater 13 Soils ...... 73 f t: ture Development of Water Resources . 13 Agriculture . . . . • 73 Ld,Ie L Pr~nt and Potential Stream Depletions in Minerals and Mining so the Colorado River Ba:.in ...... 14 Lumbering 85 i', r.~ntial Projects ...... 14 Manufacturing . . . 86 T .1U~ I I, Potential Projects in the Colorado River Transportation arid 1Iarkets 86 BJtnrn.:ndatirms. . . 21 Chapter V. VsTNG THE WATER 105 "t:BSTA~TIATI~G 1lATERIAL t; pper Basin . . • . . . . . l\)7 Green Division ...... 1M } <.•kFIIORD ••••.•••• • • 25 Prest"nt Development of Water Resource<~ 1M \ .l'rr i. lilt ~A Tt'RAl SFTTING 29 Potential Development of Water Resource.!> 113 . l'!,Y,ira! C:•.tract<'ri;tir~ 31 Grand Division . . • . . . . • . . . . 124 (><•, ,',. •·:icJ.! I·L ;torv 39 Present Development of Water Resources . 125 \.•·i.e PLmt :-ud .Lift". :\n.im~ 39 Potential Development of Watt"r Resources 130 ('l' ...... t31i 41 San Juan Divi.~ion ...... • . . . Present Devdorm'"nt of W.l.ter Resollfcc:s . 141} '. 1! lLAIMI'>G TilE BASIS 43 Potential Development uf Water Rrs.mrce~ 1-12 !. l'in• p,.. .,p"tes. 45 Summary-l"pp.;r &J.;in . 15Ct Ill IV T~ Page Lower Basin ...... 152 Forest Service ...... , J...... Little Colorado Division ...... 152 National Forests and Rechmation in the Colorad~" Present Development of Water Resources . 154 River Basin ...... , Potential Development of Water Resources 155 Federal Power Commiss\.m ", 3 Virgin Division ...... 157 Power Resources ofthe Upper Basin . 273 Present Development of Water Resources . 158 Power Resource.; olthe Lower Basin . 274 Potential Development of Water Resources 159 Boulder Division ...... 161 Appendixes · _j , Presrnt DevelopmC:'nt of Water Resources . 164 Appendix I. Wa'~r Supply, Colorado River--< 279 Potential Development of Water Resources 168 Index to Projects, E-.dsting and Potential 287 • , Gila Division ...... 172 Index to Reservoirs and Reservoir Sites 291 Present Development of Water Resources . 174 Appendix II. Eleven Maps 295 Potential Development of Water Resources 179 Summary-Lower Basin . . . . . 183 Photographs Summary-Colorado River Basin 184 Frontispiece (Grand Canyon, Arizona) . . Facing 3 Chapter VI. Po·wER FROM WATER . 187 Boulder Dam ...... 24 Upper Basin ...... 189 .Junction of the Green and Colorado Rivers 32 Present Power Development 190 Bow-Knot of the Colorado River . . 32 Power Market Survey and Load Trend . 193 Black Canyon of the Gunnison River. 35 Potential Power Development . 195 Goosenecks of the San Juan. . . 37 Summary . 196 Long-range view, Grand Canyon 37 Lower Basin ...... 197 Desert flora . . 40 Power Area . . . . • . . 197 Desert scene ...... 40 Present Power Development 198 Canyon country. . . . · 47 Power Market Survey and Load Trend . 202 Yuma project, an early reclamation development on Potential Power Development . . 204 Colorado River ...... 57 Summary ...... 205 Near Lee Ferry, the dividing point . . . 61 Summary-Colorado River Basin · . 206 Herefords on the range near Moab, Utah 75 Hay harvest on Eden project, Wyoming .. 75 Chapter VII. WEALTH FROM WATER 209 Peach orchard near Grand Junction, Colorado 77 Benefits to the West and to the Nation . 213 Tomatoes from Grand Valley project 77 Sununary of Costs, Benefits, and Repayment 218 Coal mine near Sunnyside, Utah 81 Lead-silver mine . . . . . 81 Chapter VIII. CoOPERATING INTERESTS IN THE Gold mine ...... 81 BASIN • • • • • . • • . • 221 Utah Oil Refining Company 82 Geological Survey . . . . . 223 Outdoor life ...... 87 Quantity and Quality of Water 223 Rod and red . . . . . 88 Upper Basin 224 l\!ilch cows in irrigated pasture . 90 Lower Basin ...... 232 Irrigated sugar beets grown for seed 00 National Park Service 238 Winter vegetables for Eastern markets 92 \Vate1' Utilization Program . 239 Skiing on Surveyor Peak . . 101 Summary ...... 249 Angler's pride ...... 101 Hsh and Wildlife Service 250 Hivrs of bees in date grove . . . . 102 Uppcr Colorado Basin . 250 Attractive home on irrigated farm . 102 Lower Colorado Basin 252 Parker Dam ...... 119 Rt~commcndations 253 Main canal, Salt River project . 119 Grazing Service 254 Colorado River Diversion DJm . 127 Ohjt•ctivr.s and Functions 254 Grand Valley power plant . . 127 Grat.ing Districts in the Colorado River Basin . 256 Grand Valley C::mal 127 Rurcau of Mines...... 258 Taylor Park Dam in Colorado 129 Pwgran1 of Water tltili1.ation ...... 258 Fishing at Green Lakes resort . 129 Low-rost Power and t-.lincral Devdopmrnt 259 Vallecito Dam ...... 141 Ofllce of Indian AtTairs ...... 261 Vallecito Resetvoir . . . . . 141 Indian Projects in the Colorado Riwr Basin ~61 Imperial Dam and dcsilting basins on Cok1rado General Land Ot1ice ...... 268 River .... , ...... 1<'·' COJ'lTENTS v

Page Page All-American Canal . 165 Figure 15. Estimated trend, electric power load, A site is found . . . 169 lower basin market area ...... ·\ . 204 A dam is planned . . 169 Figure 16, river profile showing reservoir and hy\ Pumping ground water 175 droelectric power plants ...... Facing 206 Roosevelt Dam on Salt River . 177 MAPS IN APPENDL'{ II Bartlett Dam on Verde River 177 Water resources development, Colorado River Basin: Downtown Los Angeles . . . 199 Goodyear Tire and Rubber Company, Los Angeles 199 Arizona . Following 291 California . Following 291 Citrus groves . . . 212 Colorado Following 291 Yuma cantaloupes. 215 Nevada . Following 291 Prize produce. . . 215 New Mexico Following · 291 Cattle on mountain tange 255 Irrigated hay fields . . . 255 Utah Following 291 Cottonwood Camp, Big Piney, Wyoming . 272 Wyoming Following 291 Hauling logs, Ashley National Park . . 273 Principal power systems, exist,ing and potential, Colorado River Basin...... 291 Maps and Charts Conservation areas and facilities, Colorado River . Basin . . . • . . • . . . • . . • . . . . . 291 Colorado River Basin ...... 9 Mineral .resources, Colorado River Basin (two Divisions of the Colorado River Basin (map) 33 maps) . . . . . • • . . • • . . . Following 291 Average annual precipitation (map) . . . . Facing 41 Figure 1. Population growth, 1900-40 . . . 50 TABLES Figure 2. Distribution of population, 1940 census . 50 I. Weather records at representative stations, Colo· Colorado River Basin States (map) . . . , . . . 62 rado River Basin ...... 42 Figure 3. Trends in animal units, 1890-1940, upper II. Population growth in the Colorado River Basin. 49 basin ...... 78 III. Estimated virgin flows in the Colorado River Figure 4. Number of farms, 1880-1940, upper Basin ...... 55 basin ...... 78 IV. Irrigation development in the Colorado River Figure 5. Size of farms, 1890-1940, upper basin 78 Basin (1922) ...... 57 Figure 6. Value of farm property, 1939, upper V. Labor force in selected employment groups in basin ...... 78 upper basin (1939) ...... • . . . . 72 Figure 7. Value of agricultural products, 1939, VI. Supplemental employment of farmers in upper upper basin ...... 78 basin (i939) ..... · ...... 72 Figure 8. Farm tenancy, 1890-1940, upper basin 78 VII. Types of farms in upper basin (1939) . . . . 73 Figure 9. Types of farms, lower basin . • . . . 93 VIII. Value of farm products sold or traded in upper Figure 10. Farm operation, 1940, lower basin . . 93 basin (1939) . . . . . , ...... 74 Figure 11. Estimated reserves of copper in major IX. Livestock in upper basin (1939) 74 mining districts ...... 96 X. Yields of major crops in upper basin (1939) 76 Fig~re.12. Copper production from principal mining XI. Number of farms in the upper basin. . . 76 d1stncts ...... 96 XII. Sizes offarms in upper basin (1939) , . 76 Figure 13. Mineral production, lower basin and XIII. Farm land available in upper basin (1939) 79 southern California ...... ·. . . . 96 XIV. Value of farm property in upper basin (1939) 79 Irrigation development, Colorado River Basin XV. Average income from farms in upp~r basin (map) ...... 106 (1939) ...... 79 Green Division of the Colorado River Basin (map) . 108 XVI. Coal production in upper basin ...... 80 Grand Division of the Colorado River Basin (map). 125 XVII. Mineral production in upper basin . . . . 83 San Juan Division of the Colorado River Basin XVIII. Manufacturing census data-upper basin . 86 (map) ...... , . , ...... 139 XIX. Value of trade in upper basin (1939) 87 Little Colorado Division of the Colorado River Basin XX. Number and size of farms in lower basin . . 93 (map) ... , ...... , ... , ... . 153 XXI. Irrigated farm acreage in lower basin . . . 94 Virgin Division of the Colorado River Basin (map) . 157 XXII. V~luc of farm lands and buildings in lower Boulder Division of the Colorado River Basin (map). 162 basin ...... 94 Gila Division of the Colorado River Basin (map) . 174 XXIII. Value of agricultural products in lower r:rincipal power systems, existing and potential . . 188 basin (1939) ...... 95 hgure 14. Estimated trend, electric power load, XXIV. Gross value of principal metals mined in upper basin ...... 195 lower basin ...... 97 Vl THE COLORADO RIVER

X:\X.:\atUJal gas and petroleum produced in so11th· LV·I.· ~\,•era·se annual 'lreaH• ilows iu the Sent an·ra:;e anuua.l water LXIV. Potential irrigation development in San cor.::umption in Green divi~ion ...... 112 Juan &.1.sion ...... 148 X~'\.111. [,timated present average annual water LXV. Potential irrigation developments in SanJuan exports from Green division . . . . . ·. . . 112 diviEion by States ...... 149 XX.XIV. Potential projects in the Green divi~ion . 120 LXVI. Potential power development in San Juan XXX\'. Putcnti..tl reosetvoirs in Green division .. 121 division ...... 149 . XXXVI. Potcntiai irrigativn development in Green LXVII. Potential import diversions to San Juan · diviskm ...•...... 122 divi..sion ...... 149 XXX\'! I. Potential irrigation development in Green LXVIII. Potential export diversions from San Juan division by States . . . . . , ...... • 123 di,·bion ...... 1·~) XXX\'IIJ. Potential power development in Green LXIX. Present and potential stream depletions in di1isivn ...... , .... . 123 San Juan divL>ion ...... 150 XXXIX. Potemi~tl export tli,·crsions from Green LXX. Present irrigated areas in upper basin . . . 15:) division ...... 123 LXXI. Present hydroelectric generating capacity XL. Present and potcnliai meam depletions in in upper basin . . • ...... 151 Grren l.!i' i;,ion ...... 124 LXXII. Potential development of water resources XLI. An:rage anmul stream flows in the Grand inupperbasin ...... ·. . 151 divi.~;on ...... •...... 124 LXXIII. Present and potential stream clqoletion in XLII. Irrigation resen:<1irs in the Grand division . 128 urpr:r basin ...... 131 XLIII. Prrsent irria;om LXXYIII. Potential pr~icns in Little Col,1rado I\ i·.t r . . . • ...... : 133 di1ision ...... 156 XL\"111. Potl'ntial project> in the Grand division . 135 XLXXIX. Potenti tl rcSt·f\·uirs in Littll' ColoraJo XI.IX. Putc·rttial n~'rn·oirs in Grar.d di\ ision . 136 divi~ion . . . . . I~,:. I.. l\ot!'nti,d irrit.::ltinn dl'wlnpuwnt in Grand di1·i- LXXX. Pott'ntio.~l irri!!ation dr1·dopmen: in Liul.: 137 Coh,rJdo division ...... l.;I.J Ll. Potr·nti:tl irrit;ion ..· . . . . . 136 I.II. I'Ptt"ldi.d l'f•\11'1' do·wlopuwnt in (;rand d1\'i· LXXXII. .\nTage anmd •tream tltlws in the \'ir- 138 gin divi-;ion ...... 15:3 Llll. l'totenti:tl cliH-rsi•>lls tu So~nJ.t:m uivi,iou .. 11S LXXXIII. Pre'\' Ill irrk<~terl ;:r.: ",; in the \"in:in Ll \". l'townti,d •·x1 '' •rt dj,·,·t ,j,.n,; frum Gra11d divi- dil'i~i,m ...... si11u . . . . LXXXI\'. [~titn.Ht·J preo;ent ct\'C'f~t~t' allll't.\! dt·· 1.\'. Prr'r·nt ,uul putrn•t.rl 'trc;llll itll\ ...... ( ;1.111<1 di\ j,j1Jl1 LXXX\'. PPtenti:ll proj(·cts in tl,r \'ir'"i'l di\ i>iLll1 . . ' i'· cn~TE:--ITS I VII ' > Pnge Page LX.~X\ I. Potenti.tl n·-;crvoirs in Virgin division 160 CXlX. Present hydroelectris'grnerating capacity iu LXXX\'II. Potential irrigation Jc\ lopnient in Colorado River Ba~in ; . , • ...... 18 t Vin.;in division ...... : . . . 160 CXX. Potential development of water resources in · LXXX VIII. Potential irrigation devclo!Jrnent i~ Colorado River Basin! . · ...... 185

• • • • • 161 CXXI. Present and pot<'ntial stream depletivn in Vin;in division by States . . . . . 1 LXX.'XIX. Potr:ntial power d"velopment in Virgin Colorado River Basin . : ...... 186 divi>ion ...... •.. , .••.. 161 CXXU. In~talled gent·rating capacity in upper XC. Present and potential stream depletions in •basin(1943) .... :. ; ...... 191 Virgin division ...... • ...... 161 CXXIII. Energy generated and load requirements XCI. Average annual stream flows in the Boulder in upper basin (1943) ...... , . . . , 192 division .. , ...... : ...• , 161 CX."<:IV. Electric energy load requirements in upper XCII. Levees and drains in the Buulder division . 166 basin (1943) .· ...... 1n XCIII. Important dams in the Boulder division . 16i , CXXV. Electric energy load requirements in Rocky XCIV. Irrigated and irrigable area under present , Mountain region (1943) . . • . . • . . • . . 193 developments (1943) • ...... • . . _167 ~ CXXVI. Estimated load growth in upper basin . . 195 XCV. Ar.eas irrigated in Boulder division by States · CXXVII. Potential hydroelectric power plants in (1943) ....•••...•••.•.••. 167 upper basin. · . • ...... • . • ...... 196 XCVI. Estimated present average annual stream CXXVIII. Installed generating capacity in lower depletions in Boulder division . , • • , .•• , . - 168 basin power area {1943) ...... 201 XCVII. Potential projects in the Boulder division, 171 CXXIX. Electric energy load requirements in lower XCVIII. Potential reservoirs in Boulder division . 172 basin power area {1943) ...... 202 XC:I~.' Potential irrigation development in Boulder CXXX. Estimated load growth in lower basin power diVISIOn. . . , , . , , , . , , , , . , , , , , 172 area...... • . . . 204 C. Potential irrigation developments in Boulder divi- CXXXI. Potential hydroelectric power plants in sion by States. . . . , . . • , , • . . . . . 172 lower basin .... ·. . . . • ...... 205 Cl. Potential power development in Boulder division . 172 CXXXII. Present power development in Colorado CII. Prest>nt and potential stream depletions, Boul- River Basin (1943)...... 206 der di\·i~ion ...... • . . . • . . . 172 CXXXIII. Estimated cost of program, upper Colo- CII I. Average annual stream flows in Gila division. 173 rado River Basin ...... 225 CIV. Irrigated areas in independent basins. . . . 178 CXXXIV. Estimated cost of program, lower Colo- CV. Imported dams in the Gila division . . . . . 179 rado River Basin ; ...... 232 CVI. Prrsent irrigated areas in Gila division . . . 179 CXXXV. Data based on U. S. Bureau of Mines CVII. Estimated present average annual stream exploration of mineral deposits in the Colora::lo depletion in Gila division ...... • . . . 179 River drainage basin. . . . . • ...... 260 CVIII. Potential projects in Gila division . . . . 181 CXXXVI. Indian projects in the Colorado River CIX. Potential reservoirs in Gila division .. , . . 181 Basin ...... • ...... 267 CX. Potential irrigation development in Gila divi- CXXXVII. Recorded and estimated historical dis· sion ...... • ...... 182 charges, Colorado River. at Lee Ferry . . . . . 279 CXI. Potential irrigation development in Gila divi- CXXXVIII. Acreage irrigated above Lee Ferry . 280 sion by States...... 182 CXXXIX. Transmountain diversion above Lee CXII. Potential power development in Gila divi- Ferry ...... 280 sion ...... 182 CXL. Estimated virgin flow Colorado River at Lee Ferry ...... •.. , . . . . 281 CXlii. Present and potential strt'am depletions in CXLI. Comparison of average annual flows, lonl!'- Gila division ...... 182 time period with 1923-43 perio::l. • ...... 281 CXIV. Present irrigation development in lower CXLII. Precipitation and run-off near Williams basin ...... 183 River . • ...... 282 CXV. Present hydroelectric generating capacity in CXLJII. Comparison of sections of Colorado River lower basin...... , , . . , ...... 183 Valley above and below Topock. . . . • . . . 283 CX\'1. Potential development of water resources in CXLIV. Past upstream irrigation depletion, Gila lowt'r basin ...... 183 and Salt Rivers . . . • ...... 283 CXVII. Present and potential stream depletion in CXLV. Gila River channel characteristics and lower basin ...... 184 climatological data ...... 284 CXVIII. Present irrigation development in Colora- CXL VI. Estimated virgin tlow of Gila River at do River Basin ...... < . . 18~ mouth (1 ,000 acre-feet)...... 285 APPENDIX I Water Supply, Colorado River

Historical Flow at Lee Ferry TABLE OXXXVII.-Recorded and estimated historical dis­ ch~rges-Colorado River at Lee Ferry · The Colorado River Compact made allocations of· Colorado River Basin waters between the upper and the Main-stem station I Sum of Colo- [ !Iistorical 1------111do River at ifiow, Colo- lower basin, with Lee Ferry, below the mouth of the Cisco, Green •t·radn River Calenuar year Recorded Litlle Yalley, I at Lee Paria River near the Utah-Arizona boundary, the point flow (thou- and SanJuan ~·erry 1 Name of station sand acre- at Farmm~ton (thotLLees Ferry gaging station on the Colorado River above 1897 ------18,721 19, 797 the·mouth of the Paria River since June 1921 and on the '1898 ------·------12,206 12,948 1899 ------16,925 17,899 Paria River at its mouth since October 1923. The sum 1900 ------11,996 12,686 of the records secured at these two stations determines · 1901 12, 925 13, 668 1902 ·:y~;;;~~-Ari-zo~i;_~~= ""7;959- 8, 245 8, 454 the flow at the point "Lee Ferry" described in the Colo­ 1903 ••••• do ______11,328 12,550 12,346 rado River Compact. To determine the flow at this 1904 _____ do ______10, 118 12, 505 11,675 1905 •.••. do.------19,712 13,800 15, 290 point prior to the period of record at Lees Ferry estimates 1906 Hardyville, Ariz... 19, 162 18, 131 18,656 were made, using the results of stream-flow measurements 1907 _____ do ______21,547 20,755 21, 179 1908 Yuma, Ariz ••••.. ~ 13, 688 10,852 12, 065 on the principal tributaries (Colorado at Cisco, Utah; 1909 _____ do ______25,975 20,543 23, 295 1910 _____ do ______14, 335 12,392 13,583 Green at Little Valley, Utah; and San Juan at Farming­ 1911 ••••• do ______17,840 14,688 16,473 ton, N.Mex.) since 1897 and on the main stem of the 1912 .•••• do ______18,406 17,686 18,393 1913 ••••• do ______.___ 11,748 12,394 12,581 Colorado River at stations below Lees Ferry, where rec­ 1914 ______..... do ______20,684 18,206 19,868 ords have been maintained as follows: 1915...... _____ do ______14, 641 10, 964 12,396 1916______do ______23, 140 16,865 18,380 Hardyville, Ariz., May 1905 to September 1907, 1917 ~------_____ do ______20,598 19,918 20, 436 1918 1______.•••• do.------13, 158 13,373 13, 775 Yuma, Ariz., Since January 1902. 19191 ______•.•.• do ______10,747 9,980 10, 611 19201 ______.•..• do ______21,444 18,764 20, 387 For the years 1897-1901, inclusive, the estimated flow 1921 1 ••••••••••• do ______19,428 18,728 19, 572 at Lee Ferry is based entirely on the records of the prin­ 1922 ______------16,ld8 cipal tributaries, with due allowance for unmeasured 1923 ...... ------16,868 1924 ______------11, 707 gains between the points of measurement on these tribu­ 1925 ______------12,412 1926 ______------· ------taries and Lee Ferry. For the years 1902 and 1921, in­ 1927______------···- t~: g:g. clusive, the estimate considered both tributary flows and 192!!______------14, 714 flows at downstream gaging stations, with due allowance 1929 ______------~------19,632 1930 ...... ------12,414 for both measured and unmeasured gains and losses be­ 1931. ••••••• ------··---· ·------6, 229 1932 ______------· ------1.1, 180 tween Lee Ferry and the point of measurement. When 1933.______9, 750 basing the estimate on the Yuma record, allowances were 1934 ______------3, 966 1935 ______------10, 283 made for the flow of the Gila River at its mouth and for 1936 ______------12.145 diversions by the Yuma project. 1937 ______------12,006 1938 ______------15,661 The following table shows the recorded and estimated 1939 .• ______------·------·--- !!, 872 annual flows of the Colorado River at Lee Ferry for the 1940 •••••••• ------·-·------7, 617 1941. ...•.•. ------··-··-·------·-- -·------·- 17, 8R8 years 1897-1943, inclusive. It also shows the combined 1942 ...... ------· ------· 14,809 flows at the principal tributaries and at the main stem 1943 ______------··· ------· ------11, 435 base station used in making the estimates. Because of AveragP .. I-··------··-··-- __. ______------14,400 the numerous C6timates necessary in extending the record, the flow for any individual year may be considerably in b~~i!;IT~~~~~~0~i~~fe:f'fr::r~~~97~:~:ln~~::/"ir'l~u~~cs~00:,~f f~~~l'~~~ stem st•tlon.; 1922 and IW23, flow at Leo Ferry lncroB&'d by estilllot•d dischar~e Par!a error, but the long-time average flow is believed to be 1 at,"J;;~~h~:~~~~~~~.~;\,~~~~~~:! !:'~~~.f'g~b~~,.l.1.'! !~~~:ioo 1n wbole or reasonably correct. part by OOrui>&rlson witb records elsewhel'll on strelllll. 279 THE COLORADO RIVER 23.2 From this comparison it is estimated that the inflow to Data presented in the preceding table indicate that the Colorado River in the 1923-43 period was about 85 average recorded flow of the Williams River is about equal percent of the long-time average. Thus the norma~ a?· to the long-time average. nual net gain;Lee Ferry to Boulder Dam, under vrrgm From available topographic mapr:; of the States of conditions would be 900,000 divided by 0.85 or 1,060,000 Arizona, California, and Nevada the drainage area be­ acre-feet annually. tween Boulder Dam and the mouth of the Gila, other than the Williams River, which likely contributes to the · Colorado River following periods of intense precipitation, Virgin flow at Boulder Dam Site is measured as 4,500 square miles. The unit rate of nm­ The long-time a\'erage virgin stream flow at Boulder ofi from this area is consider:tbly less than that 0£ the D;Ull site, for the period 1897 to 1943, inclusive, is de­ Williams River watmhed. The long-time average an­ tennincd by adding to the longtime average virgin stream nual run-off from such area is e,timated to be 40,000 llow at Lee ferry the e.timated net gain under virgin area-feet annually, m.tking a total average annual inflow l conditions as follows: between Boulder Dam and the mouth of the Gila (ex­ A.cre-fcct clusive of the Gila Ri\·er) of 150,000 acre-feet. Averagt virgin flow at Lee Ferry ______16, 270,000 Awra.~r virr:;in gain to Boulder Dam 1, 060,000 Al'r·ragc virgin l!ow at Boulder Dam 17, 330,000 Losses Under Virgin Conditions in Colorado River Between Boulder Dam and Mouth of Gila lnfiow betzccen Boulder Dam and mouth of Gila River River · V nder natural conditions there was loss resulting from: The area drained by the Colorado River br.twcen (I) Seepage to adjacent vall.:y lands, from which it is Boulder D.!m and the mouth of the Gila River is typically sub~equently largely evaporated; (2) water entrapped in dc~crl country brolen near the Colorado River by ~everal ~lon,r::hs and former river channels during flood' and later small nwuntImperial Valley, Calif.; and io 1943, inclu~ive. The a\·era,ge annual discharge in ( 3) evaporation losses from re:-etToirs back of Parker. these pcriorls was II 0,000 acre-fret. Imperial, and Laguna Dams. , Precipitation data in this vicinity and nm-ofi of the Since it :S desired to determine losses under virgin con­ Verde River at ~1cDuwcll during the period of run-off ditions and since the discharge records at Boulder Dam record on the Williams Rin."r, in cnmparL,on to the long· Ltrgcly refle(t the results of a regulated river, the lo5ses time averages, arr given in the following table: Let\Yecn Boulder Dam site and the mouth of the Gila River are based on measured losses between Topock and TABLE CXLIL-Pr~ciflilation and 11m-of! tuar Jl'illiams Laguna Dam (Yuma record corrected fur !low nf Gila Rit•cr at mouth and uiYmions for Yuma project!' for the 1~­ year period 1~1~3 to 1~134, inclusiw, with an estimated loss, b;1scd on compari~on of physirll conditions, between Boulder Datn and Tt)pock . .-\verage annual discharges at Topock and Laguna. during the 12-ycJr period 19~3 to 1931, inclusin>, com­ pan: as follows: .4cre·! Rivnat TopoeL------·------13, 30l), (lilQ Col,>r,,do Riwr .1t Laguna D.mt------···------12.610, 0Ll0

!\d annual lo;s and us<· bet\•'<"<'11 Topork ar •.l 1 Lal{ull~------·------···---··· -----·---- 690, Ollt The awra••e run-o!T Jurin(l' the 12-w:tr period of study is sonwwh.1t Je~~ than normal. It is .tu be np\TteJ tlut m·er a lnng peri1>d the )os~t'S would be ~omcwhat greater. A fig tire of 7Un.npn a. n:-fcct annually h:ts been adopt eLl \\'ATER SUPPLY 281

To make allowance for the tendency to overdivert in Net Inflow between Lee Ferry and Boulder Dam years of high run-off and for ~hortagcs in years of low Brtween Lee Ferry and Boulder Dam there are abo~t run-off the actual diversion for any particular year is as­ 55,000 square miles of drainage area, most of which is sumed to deviate from the normal by an amount which is desert plateau. The two main tributaries in this area, proportional to one-half the deviation of the undepleted the Little Colorado and Virgin Rivers, arise in the moun~ stream flow at Lee Ferry from the normal. tains and high plateaus bordering the basin; however, TABLE CXL.-Estimated virgin flow Colorado River at their principal source of run-off is from the torrential Lee Ferry rains, which are characteristic of this locality. The Colo­ IT h011,110 ' rl •oro l•ctl rado River also receives water from numerous creeks and Es:timstt>d normal HLIetions Estimated Estimated washes and from springs along the bed and sides of the ftow actual vir~in fiow Clllendar year rt)lorndo lrrigt1tion upstream at Lee deeply entrenched river channel. ki\'t'ff\t within depletion Ferry Lee l"•rrY hnsin EiE£ From a study of the characteristics of the drainage area 1S97 ______19,7971 650 5 741 20, 538 and by comparing discharges at Lee Ferry, Bright Angel IS!l8 ______12,948 711 5 658 13, 606 (Grand Canyon), and Boulder Dam for the relatively 1899_------.,17, 899 772 5 836 18,735 1900 .. ------12, 686 834 5 764 13,450 short period when these stations were operated concur­ J!lOL ______13,668 896 5 853 14, 521 rently, prior to the storage of water in Lake Mead, it is 1902______8, 4.'}4 957 6 751 9, 205 1903 ______12,346 1, 036 6 948 I3, 294 concluded that about one-half of the net inflow between 1904 ______--- 11, 675 1, 118 11 1, 005 I2, 680 Lee Ferry and Boulder Dam occurs between Lee Ferry J90ii__ ------I5, 290 1, 197 21 1, 230 16, 520 1906 _____ ----- 18,656 1, 276 21 1, 450 20, I06 and Bright Angel. 1907______21, 179 1, 358 21 I, 655 22, 834 l!l08 ______12,065 1, 437 21 1, 327 13,392 The average annual discharges at these stations during _ 1909 _____ ----- 23, 295 1, 516 21 1, 960 25, 255 the 21-year period 1923 to 1943, inclusive, are as follows: 1910 ______~-- 13,583 I, 568 21 1, 535 15, 118 19!1______16,473 1, 620 22 1, 740 18, 213 Acre-feet 1912 ______18, 393 1, 671 22 I, 902 20, 295 Colorado River at Bright Angel______12, 988, 000 1913 ______12,581 I, 724 30 I, 646 14, 227 Colorado River at Lee Ferry (below Paria)------12,582,000 1914 ______19, 868 1, 774 35 2,127 21,995 1915 ______Net gain Lee Ferry to Bright AngeL______406,000 1916 ______12,396 1, 826 55 I, 760 14, 156 18,380 1, 878 85 2, 225 20, 605 1\ll7 ...... 20, 436 1, 929 105 2, 449 22, 885 The estimated net gain from Lee Ferry to Boulder Dam 11118 ______13,775 1, 9R2 105 2, o.;8 15,843 in this period would be twice the gain to Bright Angel, or 1!119 ______10, 611 2, 032 115 1, 890 12, 501 1920 ______20,387 2, 080 115 2, 651 23, 038 810,000 acre-feet. With due allowance for the average 1921. ______19, 572 2,127 115 2, 652 22,224 annual depletion in this period by reason of irrigation de­ 1!122 •• ··------16, 198 2, 175 115 2, 457 18,6.55 1923 ______16, 81l8 2,175 115 2, 508 19,376 velopment to the extent of about 60,000 acres on the 1924 ______11, 708 2, 175 11.5 2,120 13,828 1925 ______12, 411 2, 175 115 2, 171 14, 582 tributaries between Lee Ferry and Boulder Dam, the aver; 1926. ______13,080 2, 175 115 2, 221 15, 301 age gain under virgin conditions in the 21-year period, 1\)27_-.--- •• -- 17,551 2, 175 117 2, 560 20, Ill 1928. ______14,714 2, 175 120 2, 350 17,064 1923 to 1943, inclusive, would be about 900,000 acre-feet l\J29 ______19, 632 2, 175 120 2, 723 22, 355 annually. , 19:JO •• ______12,414 2, 175 120 2, 175 14, 589 1931______6, 229 2, 175 120 1, 707 7, 936 During the period 1923 to 1943, inclusive, the run-off 1932 ______15, 180 2, 175 120 2, 386 17,566 from this region was somewhat below the long-time mean I~JJ ______9, 750 2, 175 120 1, 973 11, 723 1934 ______3, 966 2, 175 I20 1, 535 5, 501 as indicated by the following comparisons: 1935 ______10,283 2, 190 135 2, 043 12, 326 19a6 ______12, 145 2, 190 . 160 2, 212 14, 3.57 1937------12,006 2, 190 170 2, 212 14,218 TABLE CXLI.-Comparison of average annual flows-long­ 19:38.------.- 15,661 2,190 180 2, 508 18, 169 time period with 1923-43 period Hl39 ______8, 872 2, 190 180 1, 973 10, 845 1940 ______7, 617 2,190 180 1, 878 9, 49.5 19H •• ______17,888 2,190 185 2, 688 20, 576 Av.rageannusl 1942 •• ______Poriod used flow (thousand Flow 14,809 2, 190 185 2, 447 17, 256 to drtrr• aero-feet) 192.1....(3 ~~ in per .. Hl43 •• ______2, 190 185 2,180 13, 615 mine lonJ(~ Stream et>nl of ~lean. ______14,400 ~--87- Umo aver- 1.870 16, 270 age annual Long. Poriod long- 1 I1Yl3-43, time ttow limo lnclu- moon period sive Virgin flow at Lee Ferry Estimated unrlrplet.cd flow, Table CXL shows the estimated normal depletions due Colorado River at Lee to irrigation development and transmountain diversions, l<'erry •• _•••• - ••••• __ • __ - 1897-1943 16, 270 14,800 91 Salt River at Granite Reef the estimated past depletion above Lee Ferry (differing Dam •------·------· 18!15-1943 1, 484 1, 264 85 from the sum of estimated normal depletions by annual Virgin River at Virgin City, Utah. ___ •••••• ---····-- 1909-1943' 161 89 adjustments explained in preceding paragraphs) and the 1431 virgin (or reconstructed undepleted) stream flow at Lee st~~~c~~;:~i:O~~~~~i~~s :'~~;~~~~~~~~~n~~f:irn ~senoirs and paat u~ Ferry for the 47-year period 1897 to 1943, inclusive. i Fragmentary ret,rds prior to 19:111.

70U~1G-----46-19 THE' COLORADO RIVER 284

TABLE CXLV.-Gila River Channel characteristics and climatological data

Area between Gillespie Dnm and mouth Phoenix area

Length of river channel: 145. ______Above Salt River •••. ______. 90 miles · Gila River ••. ~-----~- •••• ---.---..•. _ Below Salt River.. ___ ~ ______35 miles -Salt River--- ...... --.--•.. -----.--.. ---_. ----- ______••• ______40 miles - TotaL __ -·---- ___ •• --_ .. __ ----•••. ----- 145 miles •.. ---- _____ . ______I 165 miles Average river gradient: Gila River •....•. ------4 feet per mile ______6 feet per mile. Salt River .. ----... ------. • ------.---•. ____ ... ______. __ 9~ feet per mile. Average .. _.- .... -.. - --- . -.------_- ---- 4 feet per mile ______7 feet per mile. Climatological data: Average IUJ!lllal precipitation ••••• __ • __ ._._._ 5 inches .. __ • _____ • __ .• ______69 inches. Average annual temperature ______72 degrees______9 degrees.

1 IIi addition to Oila and Salt River channels, water will be lost from tributary channels such as Agua Fira, Tiassayampa, and Queen Creeks.

(d) Using concunent records of Gila River discharge available information on stream flows. For the purpose at Gillespie Dam and at the mouth (Dome, Ariz.) for of this study the average virgin flow at the mouth of the the period August 1921 to December 1934, and making Gila River has been rounded to 1,270,000 acre-feet due allowances for the small irrigation use in this area annually. and for the fact that flows at Gillespie Dam were largely controlled by storage during the period of concurrent reet,rd, a curve was defined which shows the relationship Virgin flow, Colorado River at International between annual (unregulated) discharges at Gillespie Boundary Dam and annual channel losses between Gillespie Dam The long-time average annual virgin flow of the Colo­ and the mouth of the Gila River. The curve was applied rado River at the International boundary is estimated by to the entire period to determine channel losses. adding to the virgin flow at Laguna Dam the virgin flow The channel losses, thus determined, subtracted from of the Gila River at the mouth as follows: the computed natural (or virgin) flows at Gillespie Dam, Acre-feet Average annual virgin flow, Colorado River at Laguna give the Yirgin flows of the Gila River at its mouth. The Dam------16,450, 000 basic computations are summarized in table CXL VI. Average annual virgin flow, Gila River at mouth_____ 1, 270,000

While these estimated virgin f1o·ws may not be entirely Average annu~l virgin flow, Colorado River at Inter- dependable, they are the best that could be made from national boundarY------17, 720, 000

TABLE CXL VI.-Estimated virgin flow of Gila River at mouth (thousand acre-feet)

!\aturalloss of I ,.,. }'low of Flow of Uum~a.sur~<.l Totl\l naturlli Natural loss Naturlli !low o( Giliespll' num 10 I "~.turl\l_fiow o! Year ~1\lt kivt•rnt Gila Hivcr at nut ural inilow to inflow to in l'hO<'.li.t Gila Riwr at Gilsl\hw at Utla Ht\et at Ortmilo Ht•cl K~lvin l)bOCIUX arl"a Phoeuu ar~a area I Gillespie DIW.l mouth mouth

1 ------·--·------·------l------l·------j!------1------l·------1897 ... ·----· ---- '1, 289 ()0.) 231 2,125 5/iO 1. 575 501 I 1, 074 1898...... I 537 401 117 1,035 372 663 302 3u1 ll-1\!9...... 1 514 302 us 914 345 51\9 272 297 1\lOO ....••.•.•....• I 2tl!l I 271 52 595 2ti2 333 193 140 1!101...... - I 7tili I 3.12 136 1, 253 415 838 3-lS 490 1!102 .....•••.•...•. I 442 I 223 99 iti4 302 462 240 222 1903.. -·-··-······ I 4:36 I 2ti6 98 800 314 486 248 238 1904. .. -····. •... 527 I 336 121 984 31\;i 629 2\10 339 1\JOii ...•••• -----.-- 5, 542 IJ, Ml2 821 7, 945 90-l 7, 0-11 \100 6, 141 1\JOli. ••.. - -. . . -- 2, :.Wtl I 688 3ti0 3, 441 6!10 2, 7;i4 659 2, 095 1\!07 •...•••..•. ---- 2, 021 IJ, 013 337 3,371 685 2, tiS6 650 2, 03ti 1\IOlL...... 1, 828 I 4!'13 270 I 2, 581 610 1, \)71 5ll4 1, 407 1\IO!L •••.. ______1,7:.1[) I ~i!l5 2ti2 ') 3113 588 1,805 ·540 1,265 1\llL...... !lao 1 zoo 216 1;352 4Itl !13tl 376 560 Ul!L...... 1 2,143 521 32tl 2,!Hl0 !l!iO 2,3-10 612 1,728 l\Jl2 .•.•.• •·•·•· 1 1,0-11 53!i 187 1, 71\3 502 1,261 443 !:'IS liHL .•. ., ------l'I'S 310 lf,O 1,358 430 \l:.!S 374 554 l!ll4 ... ~-- ---·-. J,a;,o 1,342 H\7 2,ss9 l\51 2 'los 5ns I,6Io l\ll5. ·-·-···-···· 2,4uo 1,4"7 3on 4,2s3 7tiO a:5z3 12s 2,7\lli I!H6_ ---··-··· 5, ao1 1, ill\ 4:lli 7,452 HOI n 551 885 ' 5. tititi ~?.~~-----· ··- -. 2,l'llll 420 :i84 3, G2:J 702 2: !121 I 6731 2, 24S · · --·- '-·- ·--· 1, 018 250 25S 1, f12U 444 1, 082 l 408 6i4 1 llu>lt· l"llll·(lil tt•c<>rd "'' tmut<-d in whole Ill J'lltt. WATER SUPPLY 283 as representing the long-time net loss and use between ords, which are often fragmentary, and never fully Topock and Laguna Dam. reliable, estimates have been prepared of the virgin stream Depletions due to the irrigation of lands in the Parker flow of the Gila River at its mouth (Dome or Yuma, and Palo Verde Valleys are estimated to be 120,000 acre­ Ariz.) for the years 1897 to 1943, inclusive. The results feet, which subtracted from the total loss leaves a natural of the calculationS are shown in table CXLII. The net loss of 580,000 acre-feet. This loss occurs despite in­ method used is briefly outlined as follows: flow to the river previously estimated at 150,000 acre­ (a) The annual inflow above the irrigated area sur­ feet, so that the actual natural loss between Topock and rounding Phoenix was determined by extending the Laguna Dam b 730,000 acre-feet. records on the Salt River at Granite Reef Dam (fairly The Colorado River Valley sections between Boulder reliable estimates) and on the Gila River at Kelvin ( esti­ Dam and Topock and between Topock and Laguna Dam mates subject to considerable error). From a study made compare as follows (prior to construction of Parker and· in 1934 of fragmentary records of tributaries entering the Imperial Dams) : Phoenix area below the Granite Reef Dam and the Kelvin gaging station, the unmeasured inflow below the two TAnLE CXLIII.-Comparison of sections of Colorado River base stations is estimated to equal 45 percent of the an­ Valley above and below Topock nual unregulated run-off of the Verde River at its mouth. Arus (b) The base records of the Salt and Gila Rivers were above Topock corrected for past irrigation depletions and past storage lletween Boulder Feature !Jam and Topock Betr:~~;~ and ~-~f changes and evaporation losses from reservoirs to reflect 81't'8S below conditions as they would have been prior to irrigation de­ Topock velopment. Past upstream irrigation depletions were assumed to vary uniformly between amounts at various Str~am channel 11,000 acres.. 25,000 acres ___ _ 44 area.' periods as follows: Y all0y floor arl:'a 1 ••• 80,000 acres__ 250,000 acres ••• 32 Irri~ated a!'f'a ...... l'lone_ •. -. __ . 3.5,000 acres •• __ 0 TributariP~ entering Mmor washes. Williams River TABLE CXLIV.-Past upstream irrigation depletion, Gila Colorado !liver. and small and Salt Rivers washes. 1 1\Jp._,ured from riHr survey •beets of Colorado River below Black Canyon, published by the U.S. Ocolog•cal8urvcy in !92i, Considering that all of the valley floor areas are not inundated every year, it is believed that channel losses from the region above Topock will be about 40 percent of the channel losses below Topock or about 300,000 acre­ feet annually. This added to losses below Topock makes the total natural channel losses between Boulder and Laguna Dams 1,030,000 acre-feet annually. (c) An estimate was made of the channellossr.\1, prior to irrigation development in the Phoenix area, Direct Virgin flow, Colorado River at Laguna determination of such channel losses is impos.~ible because of the lack of discharge records prior to the initiation of The average annual virgin flow of the Colorado River irrigation development. By comparing the physical con­ at Laguna Dam (above mouth of Gila) is estimated as ditions of the stream channels in the Phoenix area above follows: Acre-teet Gillespie Dam (located at the lower end of the Phoenix Virgin.How, C?lorado River at Boulder Dam ______17, 330,000 area) with stream channcf conditions along the Gila River Plus tnbutary mllow, Boulder Dam to mouth of Gila__ 150, 000 between the Gillespie Dam and the mouth of the Gila Less natural 1, O:lO, 000 channelloss~s------River, it was estimated that natural channel lasses in the Virgin How, Colorado River at Laguna Dam Phoenix area would bear the same relationship to (above Gila River)------16, 450, 000 measured inflow at Granite Reef and Kelvin as natural channel lossr.s below Gillespie Dam bear to the flow at Virgin flow, Gila River at Yuma Gillespie Dam. By subii:-::·- the natural channel losses, Throughout the Gila River Basin, the securing of thus determined, from the estimated virgin inflow to the stream-flow records is made dillicult by violent floods, Phoenix area, there was drtcrmined the virgin (or nat· shifting channels, and sand and silt. Except in the ural) flow of the Gila Ri,·er at Gillespie Dam. Phoenix area, where exten~ive irrigation development has The channels of the Gila and Salt Rivers in the Phocni:Ic been made, there arc no reliable long-time records of the area compare with the Gila River channel below the Gila River and its tributaries. Using the available rec- Gillespie Dam as shown in the following table; WATER SUPPLY 285

TABLE CXL VI.-Estimated virgin flow of Gila River at mouth (thousand acre-feet) -Continued

Flow of Flow of Unmeasured Total Dlltural K atursl loss Natural flow of :'\atnnl los• of Nat ural flow or Salt River at Gila River at natnral inJiow to inJiowto in Phoenix Gila River at Gillespie Dam to Gila River at Year Granite Rl:l!f Gila River at Kelvin Phoenix area Phoenix area area Gillespie Dam mouth mouth

1919.-----········· 2, 201 949 375 3, 525 697 2, 828 666 2, 162 19:!0 •••••. --•••••• - 2, 478 627 440 3, 545 691 2, 854 670 2,184 1921.. ...•••••••••• 1, 826 536 170 2, 532 616 1, 916 558 1, 358 1922 .•••••••••••••• 1, 569 189 339 2, 097 534 1, 563 501 1, 062 1923 .•••••••••••••• 1, 754 575 325 2, 654 610 2, 044 573 1,471 l!l~L ...... 967 299 140 1, 406 443 963 380 583 !925 .•••••••• -•••• - 693 303 143 1,139 388 751 330 421 1926.. ••••••••••••• 1, 334 493 241 2, 068 546 1, 522 492 1, 030 I 927 .•.••••••••••• _ 1, 927 366 417 2, 710 607 2, 103 582 1, 521 1928 •••..•••••••••• 643 214 153 1, 010 353 657 300 357 1929 ••••••••••••••• 1, 025 338 188 1, 551 462 1, 089 . 409 680 1930 .•.•• -•••••• -.- 857 420 158 1, 435 446 989 384 605 1931. ..•.••• ----•• - 1, 360 577 224 2, 161 560 1, 601 507 1, 094 1932. ··------2,045 534 390 2, 969 635 2,334 610 1, 724 1933.------.•• --- 701 304 I 107 1, 112 390 722 315 407 1934.. •••....•.•.•. 372 256 84 712 285 427 220 207 1935 ••••••••••••.•. 1, 516 481 255 2, 252 560 1, 692 520 1, 172 1936 ••••.• ---•• -•• - 1, 109 328 146 1, 583 472 1, 111 410 701 1937 ••••• ~---····· 2, 101 511 408 3, 020 640 2, 380 615 1, 765 1938 ••••••••••••••• 971 232 222 1, 425 414 1, 011 385 626 1939 ...... 749 263 136 I, 148 410 738 320 418 1940.. •••••••••••• 1, 070 462 126 1, 658 490 1, 168 515 653 1941.. •••••••••••• 3, 491 1, 250 557 5, 298 808 4, 490 790 3, 700 1942 •••••••••••••• 884 288 147 1, 319 427 892 355 537 1943.-.--.-••••••• 974 288 143 1, 405 440 965 380 585 Average._ ... 1, 508 I 527 244 2, 279 527 1, 752 480 1, 272 288 THE COLORADO RIVER

I'& 'I'll Page Ilolbr!Juk. ---- _•. ---.------·------155 Provo Hiver _____ .. __ . _ 111, 112, 217 RattlrRnake Power_. __ . __ . 118, 120, 123, 196, 244 ~~~:~;~~i--~ ~ ~~~~ ~~ ~~::: :::::::::::::::::::::::::: ;~:: ;~; Hed Canyon. ____ ._. Hi, 120, 123, 196, 245 .Hunwr :\Iesa ..... ------131,135,136,137 Redland~ ______. _. _____ . ______133, 135, 137 Hurricane ...•... 159,160,161,205 ~------River Rectification ...... _. ____ ._. ___ . ____ . ___ . ___ . 171 Roan Creek ______131,135,136,137 Jl'nsen .... ------117,120,122 Jicariila •• ______. __ • ----. 266,267 Rock Creek Tunn!.'L------116,118,123 Jones P8.'lil TunneL •• ------280 Safford Valley unit, Central Arizona ______180,181,182 Jo~C'phine Basin. ______. __ .. _•... __ .•• ------.. 116, 120, 122 Salt River. ______..... ____ ._.__ __. 56, 58, 176, 189 Salt Rh·er (Inrlian) ______264,267 Kaibab ..• ------___ . _..... ___ --..... ---.---•. --- 264,267 Kanab Creek______.------.. ---.--.----- 159, 160 Salt Hiver unit, Central Arizona ... _ ___ . _...... 180, 181, 182 San Carlos •.... _.. _____ -----... __ . __ .. ___ 176, 264, 265, 267 tallarge uuit, Sublette ______113,120,122 San Carlos unit, Central Arizona._. 180, 181, 182 Lake Fork·------132,135,136,138,196 San Diego______------166,170 las Vegas Pumping ______168,171,172 San Franci~eo unit, Central Arizona ______180,181,182 Leroux CrePk .•..•.• ~------133,135,136,137 San Juan-Chama Diversion ______.______146,149 Lily l'ark ______116,120,122,123,196 San Juan-South Fork Diversion .. ------146,149 Littl~ Snake-North Platte Diven;ion ______116,123 San Luis Valley ...... J..... 142 Little Hnake Hiver ••••••••.••.••.•.... 115,120,121,123,196 San MigueL ...... 134,135,136,137 L,,,,w Bi!! Sandy uuit, Sublette ______113,120,122 Santa Clara ______159,160 Lnnan .. ------~------114, 120, 122 Sanpete ______------111, 112,280 San Xavier ______------267 :\Iant:o3 ..... ______.• ___ •• _•• _..• ______••. _...... 140 SapinerO-----~------: _____ 132, 135, 136, 138, 196 ~fHL:c Canyon-Kanab Crl!{'k. _ 168, 171, 172,205,216,240,242 Saucer Valley ______. _. __ .... __ 133, 135, 136, 137 :'\[ayb<~li__. ______115,120,122 Sced~kadce unit, Sublette..... 113, 120,122 McE!mo ______144,147,148 · SentineL------____ ..... _. ______------••• 171, 181, 216 Minnie l\laud. ______. _. __ . __ . _------______117, 120, 122 Shiprock ______144,147,148,266,267 ~lillntll>ul.t\ ..•..•.•....•..•.••..••••..•.•. 133,135,136,137 Shivwits. __ .. ___ . _...... _.. __ ..... ____ .• __ . __ . _ 267, 268 \loab ______134,135,136,139,196,243 Silt._ 131, 135, 136, 137 1loapa R,;servation ______------265,267 Slick Horn Canyon. -~--- 145,147,148, 149,196 ?IIoapa VH.lley _____ -----.••.•.•• _---- •••• ------••• __ 160 Smith Fork .••..... ------132,135,136,137 !IToapa. \'alley Pumping •••• ·------:-···------160 Snowflake______155,156 l\Io!Tat TunneL ______---- 126,217,280 Southern rte ______------265,267 ~Iojave Valley ______170, 171,172 South l'8.'lil Diversion______------114, 123 Mont(:zuma Valley ______135,138,140 Montezuma. Valley Extension. ______•• 138, 145, 147,148, 149 South Ran Juan ______143,146, H7, 148 l\Ionumellt Rocks ______1H, 266,267 Split Mountain...... 117,120,123, 196,244 Moon Lake._ .... -----_. ______• ___ ------______110 Strawberry Valley ______: ______57,112,118,280 !\loon I.ake ExtenHion ______116,118,120,122 l\losby ______117,118,120,122 Sublette._ .. __ .. _... _.. _____ ..... 113, 120, 122, 123, 196, 245 Summit.. _•. _ . _ . -.. -...... •••• __ _ 128 Mount Ha.rris •..•• __ . _.•. _. ___ ..••• ___ •. __ .•• 115, 120, 122 Muddy Crl'('k ______130,135,137 Muddy Creek Diversio11 ••. ____ . ____ . ----. ____ ----- 146, 149 Tarbdl Ditch. ______280 Tomichi Crt'ek _. ___ . _. 132, 135, 136, 137 Navajo Indian .• ------145,147,148,264, 2t16, 267 Torrey. ______.. 146, 147, 148 New Mexico unit, Central Arizoua ______181,182 Trouble"onw •. ___ . ------.--.- 130, 135, 136, 137 Nucla .••• -•. __ --.--- ••• -·-- ___ ._ •• ______•• _ 133, 135, 136 Twin Lake::; Tunrwl Divcn;ion .. 280 Ohiu CNwk.______------.. 132,133,136,137 rintah ..... ____ .. _. __ ---- ... 267, 268 O'l'le~tl Park ••.•.... __ ------143,147,148 OpaL -- - ...• - ••• _ .•.•. _• _. __ . __ ... _. _ 114, 120 rncompahgre. -·------•• --. ---- 56, 128 rncompahgJ'I• Res('r\'ation.­ 267, 268 Onra) -·------133,13.3, 136,137,196 l:pper Yampa ..•. 115, 120, 122 Pa<>k Crt'('k______.. ------134,135,137 rt.e Mountain .... _ ------265, 268 Pain1<>d Ro1·k _• _. __ _ _ _ . ______. __ •. ______171 Pnlo\'erumping. __ 168, 171, li2 Pfll'lnia ••... ~~~:::::::::.::~~~-~-:::::: 132,135,136,137 P~trarliile uuit, Subll'lt.<>...... 113,120,122,245 Paradis!' \'all!·y uuit, Ct·utral Arit.olia •. ____ ... 11<0, Hi!, 1!'2 Wellton-Mohawk Division, Gila. 11i4, liO, lil, 1i2 l:::~rkcr Du111 .• ------_.• ___ • 161, 1133, 164, Hi6, 197, 198,201 Weminuchr Diwll'ion_. ___ _ ------142 },cvanc••------.. --·-- --- .. ----- !HI, 1:.!0, 122 Wl'"-"'-'ls .•...... 115, 120, 121 l'i••dra-HioGrnnde !Ji\cr,.:iull ·---·-·-····- 115 1-19 \\"t·~t Divid<' _____ . ___ . 131, 135, 136, 137 Pin!' J:i\w. __ .. _. ' 140 Wt·~t l'nrsdox _ 134, 135, 131\, 137 l'ine Hinr Ext•·•"iun ----- ···-- .. 141.147, J.JS WP~t ::iduunit, Suhl('fl••-- -- 113, 120, 122 Index to Projects, Existing and Potential

Page· , Pa~e Ak Chin ••••. ___ . __ • ___ .----••••••••••••••.•••••• 262, 267 Echo Park ••••...•••....••...•.••.••• 117,120,123,196,244 Ahuno .•••• ------··------170,171,216 Eden •••••••• _._ ••• _..•. __ ....• _•.•.•••••..•.••••• 110, 120 All-American Calli.IL. .••.••• 59, 63, 64, 65, 66, 67, 164, 16"; 167, Eden Extension unit, Sublette .•••.•....•.....•••••• 113,122 , 168(fn), 170,200 Elk River-North Platte ••.•..•..•••... ------116,123 Auima.~-La. Plata.------145,146,147,148,149,196 Elkhorn unit, Subl!'tte .••••.•...••••... 113,120,122,123,245 Animas-Rio Grande Diversion .••.•• ------145, 149 Emerald Lake ...... •...•••••.••.••••. 144,147,148,149,196 Emery County •••....•...... _..••.. _.•...... • 118, 120, 122 Big Bend Pumping .•••• ------170,171,172 EscalantE~ .•••... __ •...•...•..•....•••. ___ . __ . 146, 147, 148 Blaek Creek •••• ------155,156 Blanding ______135,138,145,147,148,149 Ferron-Manti Creek DiverMiOIL ...... l18, 123 Blue River-South Platte Diversion •••••••••••• ~------132 Ferron-Twelve Mile Creek Diversion ...... 118,123 Bluff------145,147, 148,149, 196,216 Flaming Gorge_ •.•...••..••••••• _•• _. 114, 120, 1~-3. 19~3. 245 Boulder Canyon .•• 25, 63, 64, 65, 66,164, 166,197, 198,200,201, Florida. __ •••••.•.••• _•.••• _...• _•• _..••.• __ . ' '4, 147, 14il 216, 217' 240, 252 Fontenelle unit, Sublette ••...... •.••.... ____ :3,120,122 Bridge Canyon ••••••...•• 155,168,171,172,205,216,240,241 Fort Apache...... 21>~. 267 Buckhorn ...... ------118,120,122 Fort McDowelL .. ------__ .••••. ------• ~63, 267 Busk-Ivanhoe TunneL ...... ------••••••.• _.. 280 Fort Mojave ...... 70,171, lc'!, 2tl3, 267 Fort Yuma ••• ------·--·------·------· • 2G5, 2ti7 Camp 262, 267 Fourmile ••.••. --~------130, 1:.. .3,13tl, 137 Capitol C'reek ...•.••••.•••• ----'------131,135,137 Fremont.. ••...... •..•...... •••••.••...• 1-Hi.147, 148 c~rraeas _____ ------143, 147, 148 Fruitland ••••• _....• ______.... ____ •.. __ • lli, 12ll, 122 C'ostl" Peak ...... ------117,118,120 Fruitland MPsa ..•••••.•...... ••••..... 132,135,137 Cattle Creek ______130,135,136,137 Fryi11gpan-Arkansas Dil'~rsion •••...... •••... __ .. .• . • 132 Central Arizona ... "------164,179,181,182,205 Crntr1\l rtah .. _..... _____ •.•.. _.. ___ . __ : __ .....• _ 117, 123 Gila ...... ------164,170 Charleston unit, Central Arizona ...... 180,181,182 Gila Bend .•••••••••.....••••. ·------263,267 Chino Valley ..••.•••••.•... -'·------181,182 Gi111 River_. __ ••••••.• _...••••••. _.... _.... _ ..• __ 263, 267 Chiu Chiu. _••••.•...•.• ____ .•..•.. ------_ 262,267 Glen Canyon ..••..••.•.•..••. 146,147,148,149,196, 2-!0, 2-13 C!na·kRwalla. ___ ... _...... :. ___ .••..•••... • 170 Gooseberry ...... _ ...•••••. ------118, 123 C'iGore Canyon ••••••.••.•...•...•.••.•. 130,135,138,1116,243 Cwhrtopa Creek ...... •.•.•.•.•.••••.. 132, 135, 136; 137 Grand 1\Iesa ...... 133,135,136,137 C'nronino ..•...... •...... •• l55.lfi8, 171,172.216 Grand River Ditch .•.•••.... __ .•. _...... 2t10 Cncllpllh...... 262,267 Grand Valley ••••••••..•...•...•.••.•. 56,125,126.137,190 C'ulll>ran ..•••••••••.•...... ••....•..• 131,135, 13tl, 137 Grand Valley Extl'llsion ...... 131,135 Colorado-Big Thomp~on .••••••...... ••.••..•...•. 126,190 Great Bend .•.••.•••.•••..•..••.•..•. 1-!5,147, 148,1-1\l, 196 Colorado Rin•r Indian .•..•...••••...... •••••• 164,2112,267 Great Nortlwrn •••••.•..•••...•.••. ·...... 115,120,122 t'ulurado River-Yampa Ri\-cr Div{'r>r-Smiths Fork unit, Green-Bear Diversion .• 114, 123 llanicl C'n•ek ...•... _.•• _____ ... _... _. ···------. 112,280 Gunnison-Arkansas Diversion._ ••.• _.••••.•••• __ ..•.• 133 TlnlliPlnnit, Sublette .....•...... --·-··----- 113,120,122 Gunnison-Rio Grande Diversion...... 133 l 1urk C'unyon .•••••..•..•...... •.•. 146,127,148,149,196 Gunnison Valley .•••..•••••••••.•.•••••••••.•• 118,120,122 D:P:is lllllll..!'.· .. ______u7,164, 200,240 Davig Rc•cn·oir Pumpin~r ...... •..••.•..•. 170,171,172 Hammond ...... 143,147,148 l>t•:HlmRn Bench .••.•..••...... •..• 115,120,122,123, l!l6 Hams Fork-Twin Crt--ek unit, Green Rin~r-B<:'ar River llt;ol:uion Canyon .•..•...•...•.••.••••••. 118,120,12:1, 11l6 Divt>rsiou ...... 114, 123 D~''' ry .• _••...••... _ ...•.•... _.. I 34, I 35, 136, 138, I !ltl, 243 Hassayampa ..•••. ~ •..•• _•••. _••.. _•.••••..•. __ .• IS I, 182 floh,r.·•---·-··-·············· 134,136,138, H5, 147, 14~. 149 H!llch Crt'ek- ••••...... •.••••.•..•.•..••• 134,135,136,137 lltilre-Cluuna-Xavajo ••.. _..•.. __ ...•... __ ....• 1-13, 147, 148 264,267 Dnr•clln-Vinh•n Valley unit, Central Arizona ..••..... lSI, 182 llerrry3 114, 120,122 287 \\'ATER SUPPLY 289

Pago Page White River Diversion •.•. us, 123 Yellow Jacket. ..•..•.•..•..•. ______ll5, 120,122 WillSlow •••••••. 156 Yuma •••.•••...••..•• ~----······- 56, 164,166,200,279,282 Woody Creek. __ · Wurtz Ditch •. Zuni •.•..•. __ . _. _..• _...... • 267 292 THE COLORADO RIVER Page Page Hades site .• ------···------· 117, 121,246 McDonough site .•.•••• _. ____ ------__ ••• _. __ .• 132, 136, 246 HalfwaY Hollow site ••••••••• ------116, 121 McDowell site •• ·------180,181 Harvey. Gap ...... ------128 Me Elmo site .• _.••. ______. _____ .------.•• __ 148 IIavasn Lake (Parker)~.------~------163, 166, 170, 180,253 ~cPhee site ...... 135,136,145,148,246,249 H;>ystack site------·------131, 136,246,249 u~~o~a Park site.~------~----~------·--· 144,148,247 N'arraguinnep. _••• _•••••• _---- __ •• __ ••• _. 140, 142, 145, 148 llog Wallow I\('. 4 •.•••••• ~- .•••..• --..• -.---.-----. 155 Navajo site. ___ ._._ ••.. ______._ 143, 148, 248 Jl o~ker site •• _____ .• _____ ---.----•• - •••. -.'.. ---.--- 181 New Fork Lake .. ------·------111 Hoop Lake ..... _.. --··-'·-----.• ------.--.-.------. 111 New Scott_ __ . __ .. ______------__ ••• _..•••.. _...• _ 155 llorse !I'T0sa .•• __ •••••• _. _••• ._ •••••••• -- •• - •• ·c·. 176, 179 North Fork site...... ------121 Ho~eshoe. ___ •.• __ • ____ ••• ___ • _••••• ____ 178, 179, 180, 181 Horactooth ...... ----•.••••.. ~- ••..•.•.••·• ------128 Oaks Park ..•• ------112 J Howarcbville site.------···• 144, 148,249 O'Neal Park site ______._ 143, 148,247,249 : Overland ••• __ •• ____ .. ------_____ • ______•. _.... 128 ImperiaL._ •••••.•.••.. ___ •••••••••••••••.... ----.-- 167 Owens Creek site ______"___ 131, 136,249! Ironton Park site ..•..••••••..•.•••.••••• ; •••• 133,136,249 Island Lake .•••..•••••••••••.•••.••••••.•.•..•.•••• · 128 Pacific No.2------111 : Ivanhoe.. __ .. _..•.. _•. _.••...•.•.. ------••. --.... 128 Paradise Park._.----...• ______---- ______...••.... 112 1 Jack~ou Gulch .•..•••••••.... : •.•.•••••••.••••••• - 140,142 Park ...••.•.• __ .•.. ------___ ------..• __ .•. __ 128 .)r,~-s Valky oite ...... 118,.121, 246,249 Patterson Lake .... ·------___ ------______.••• __ ••• Ill Johnsnll \'alley. __ . _____ •.•• _•••• ---- __ . ___ -----.... 142 Pelican Lake site·------116,121,249 .Jc.hn Starr...... 112 Piceance 116, 121 · .J tllills Lake .•. _._._ ••• __ ••••• _•.•.. _•• ____ ._. ____ ._ 142 111 .Lmipcr site ______116,121,246,249 Pine Lake. _____ •••• __ ._ •• ------___ •.• ______.___ .:: 155 1\<'ntn:erer .•... _. _.•. ______•• ----- ___ • _••• ___ ----- 111 Pot Hook site·------·------11.1, 121 Kendall site ...... ·------113,121,245 I-:iuue) Lake .•.• -~ __ • ______• ______---· ____ • ___ -~- 112 RAbbit Ear site·------130, 136 Ramah ••••• _••...•• __ ••.. _••• _••.••.•• _..••.. __ ••• 155 Laf}arge ~leadows site •••••••••••••••. _••••• _____ • 113, 121 RA .tlesnake site._. __ ----- ___ .•. _•. ______. __ • 118, 120, 249 Lake Atwood ••••••••.• ~--- ____ .• __ ._. ______•. _____ • 112 Re(apture site •• ·------145,148,249 Lake(B.rennan ••••••• __ ••• _---- __ • _---- •••.••• 132, 136, 246 Red Canyon site.·------121, 249 I.akll Ilope.••.•• _____ • _. ______• _----- ___ -----_ 128 Red Creek site._ ••••• ______. ____ •••••• ____ .. ____ . 1 I 7, 121 Lake, :Mary._. ___ .•• __ •• ___ •.•• ------••.••• _._ 155 Red Mountain site ...•. _____ •••••••••••• ---. ___ .. _ 133, 249 La~ke,~ea.d ••••••..•• 157,163,164,166, HIS, 216,217,240,241 Rescad ~--- .••••••••• ----. _--- •••.• ------. _.•••. _ 155 I.nk Pleasant...... 178, 179 Resen·oir ~o. 4------~------~--- 121 I.a San CristobaL. ______132,136 Rifle Gap site.·------~ 131,136,2.W,24\:I La.~-4-'lide •••• ----.••••••••• ___ • _•••• ____ • ______• __ _ _ 155 Leon Lake •.•••• ______•• ) .•••••••• _•••• ___ • _____ •• 128 River N'o. 3 ...... •.... ~------.•. ------.... __ . _ 155 Lem1on site ...... 144,148,247 Road Crt-ek site ••• ------.-~------.••••• 176, 179 Lily Park site ...... ········-·------121,249 Roosevelt ..•••••• _. ____ ••••...•..•..· ..•• _._ .•.. ____ 148 Lime Creek site.·-·------144,148 Lone Coue .• ____ •. _____ •••.•• _•••• _•••••••••••• __ •• 128 Saguaro_ •.....•.• _.••••• " •.•.•..•..•.••••••• _____ . 180 San Carlos._ ... _•. _. _. ___ .. _.... _.. __ • _.. 176, 1.80, 264, 267 ·Lone Pine ••••• ---·····-··------~------155 Long Hollow site .•..•.••• , ••.••••••••.••• 1H, 148,247,2-19 San Vicente ...... -....•• -._.--.... -... -_. __ .. __ .••• 171 J.owor Gunlock site •••••.••••••••••••••••• 159,160,248,249 San Juan ~ite •..••.. __ . ------.----...... __ .... _ 247 Sapinero site •.•••.••.• ------132,136,2-19 ~~~~~~~~~- :~~~~~ ~ ~ ~~ :: ::~::::: :::::: ~: ::: ~:::: ::: . ~;; Savery site .•.·------···------115,121 Scofield •••••..... ---..•. ------·-----.- , __ 111, 112 ~[ammoth site.--···········------··· 118, 121,246,249 Sentinel site ...... ------...•..... 171, 1i2 1\!s.ny Farm~--_._ •• __ •• __ •••••••••• _...... 142 Shel'p :\[ount.ain site. ··------116 Marble Canyon ~ite •••.••• ~---·-····-- Hi8, 172,180, 2·19, 250 Shumway site .•.•....••••....••...... •.. 155,156,248,249 1\Iarsh Pass. ___ ••••••• ______•• _••••• ____ ------142 Silver Lake. _..••.•• __ •.... - ...... _... _ 111 l'lleadows ••••.••.•••••••.••••••••••••• ~------144, 148,2·17 Silverton site •...•.. ___ .. _•.. _._ ... ---. ___ . ___ ._._ 144, 148 l\litldle IIams Fork site ••.•••••....•••••••••••••••• 114,121 Sixty•Ft.'ven ...... ____ ...... • ---....• ___ . _. __ • 111 l\liddle l'iney Lake...... 111 Slick Horn Canyon sit.e ...... -----·------145,148 ~~~dvicw .••••• --.-.... --··-•• ·---•• - •• -.-••• - •• -- 110, 112 Soldit•rs Annex Lake. . .•. _••..•.•• ~ _. _...•.... _.. _ 155 • 111 Crc(·k site .• ·--·-········-·------· 131,136 Spectade Lake ...•.•.....••.... - .•.•.••... _... . . • . 142 ~!ill M<·adows site.·------··------146, 14S, 249 Split Mountain site ______117 21,244 I\lit11tie Holden site ______113 121 Spring C'r<'Ck Site ••.....•••. ---.----...... 136, 246, 249 1\fimue Mau~l sitc •.••••••••••• t·····------·· 111:121 Stanaker site..•••••.•.••.•... ------__ •.••....•.. 117, 121 1\llr:unonte ~1te . . ------13·1,136 Starvation site ______------117,121,249 ~~~~' 011 ~ 1 1It'lt;hts .••.••••••.••••••••.••••• 128,130,136,249 State Line site, Kanab Creek ______Lifl, 100 ,,louh ;1tc State Line site, LaPlata River ______144, 1·18, 217,249 ~ronuluel~t-it<;r·k·s-;it; ~: ~ ~ ~:: ~ ~~~:: ~::: ~: ~ :·i44: i4s: 247, ~~~ Stewart 1\lounutin ••••.•••.•.•.•.•.•.....•.••• 176,179, ISO lont~~ ( f('t k ••••• __ ••••••. ______•• __ • ___ ------·-· 112 .Stone Cabin sit.t> ...•••.•••.•.•.• ------134,136 Moun Luke ••••••.••••.•• : .•.•••••.••.•••••••••.. 110 112 Strawberry ...... 110,112,117,121 l\lomllln Flu!..... ------·······------· 176: 17!\ Summit. •••...•.•. ·-· __ .• _•.•.•...•••.•.•.•.•.• _. .• 142 Index to Reservoirs and Reservoir Sites

Page P11ge. Alamo site .... ------···················· 170, 171,248 Daggs ••.• _••••••• ___ ...... • ___ •.•...•. __ . __ ._._.... 15.5 Arboles site·------144,148,247,249 Dark Canyon site.....•..... ·------146, 148 Davis.------167, 170,240,249 Banana R&~~ch site •••••••• ------132, 136,246,249 Deep Ward .•• ____ .. __ • ____ ••. ____ . ____ .. _... __ •... 128 Barbers Basin site •••••••• ------130, 136,249 Delmue site ....•.. ------159, 160,248,249 Barron .•.. _____ ~------...... 128 Desolation •.....•• ------118, 121,249 Bartlett •••••• ------176,179,264 Dewey site ...... ------·- 134, 136,243,249 Bauer Lake •.•..... ----•••.•• ---...... 142 Divide Lake·------·--- 144,148 Beaver Meadows •••.•.... ___ .•••• ---- __ .. ___ --- __ ••• 111 Dunkley site·------115,121 Beaver site ...... ___ .• ----•...••.•••••••..•••• _.. 133, 136 · Big Basin site·------114, 121,249 East Canyon site .• ------··· 134,136 Big Creek No. L------128 East Fork site, San Juan River...... 148 Big Creek No.3 ••... ------128 East Fork site, White River______121 Big Crct'k No.1------128 East Park ••••••.. -----·····------112 Big Sandy Reservoir No.2.------110, 111 East Troublesome site ••..•••.•.••...•.•....•...... 130, 136 Black Creek site •• ·------156,248 Echo Park site ••• ·------·------117,121,244 Black Joe Lake------111 Eden No. L------···-----·------·· 111 Blanco site ••••••••••••••.•••••....••••••..•••.•• ___ 148 Eggleston Lake ...... ~------128, 133, 136,246 Bluff site •• ------145, 148,247 E. K. Olson •....•• ------·--- 112 Boulder Lake.------111, 113, 121,245 El Capitan ...... _•.. _•••• ------.••••••• _____ •.•• 170 Box Canyon site ..••••••• --····------181,248,249 Electra Lake ....• ______• __ ••••••••••••••• _...... 141 Bridge Canyon site ______168,171,180,240,241,249,250 Elkhorn ....•••••••••• __ . ______._ .•• _.. . • • • • . • • . . . Ill Bridger site ••• ------114, 121 Elliott site------··------180,181 Burkeye ..•••• ------·------128, 134, 136 Emerald Lake ...... _. ______144, 148 Buckhorn site.------118, 121 Erickson Flat...... 112 Burnt Lake .•• ------113,121,245,246 Escalante site .•... ---·------·- 146, 148,249 Butte~ ~ite •... ------180,181,249 Ferron._._ •••. _..•• _...... __ .. _ •.••• _••.. _._..... 112 C'alifornia Park site ...•••. ----·------·------115, 121 Finch site •••• __ ------..••.•.•. _. 134, 136 Captain Tom .. ------______• 142 Fish Lake ..••• ______..•• ___ •••••••••...... •.•••.•. 142 Carr Creek site------·····------131,136 Flaming Gorge •••••••...•.••.•••.•.•••••.•••. 114, 121,249 Carter Lake ...... • _..•..••••••••••. __ •. ___ ••.•••• 128 Fontcnelle site ...•••• ~------113, 114, 121,249 Castle .. ___ • __ ._ ••• _•• ___ .----...... 136 Forks site...... 155, 156, 24i, 249 Castle Crct'k site .•..•...••.•.•..••••.•.•••••• 132,136,249 Forsythe ..•...•••• _. __ ••••• __ •••• ______•• _._...... 142 Cave Creek •••• _•••••..••• _••• _...... 179 Fourmile No.4 site ••••••••••• ------·--· 130, 136,246 c~d:lr 1\Iesa ••• ------.------.-----.------.. 128 Fox Lake ...••.•. ------...... 112 Charleston site •••...••••••••••...•••..•.•.••...•• 180, 181 Fremont Lake •...•.•••.•••. ------...... __ 111 Chevelon. _••••.• ____ ..••••• __ •..•••••. ____ • __ •.•.. 155 Fruitgrvwers. ~- ...... _•.... _.•.• __ 128 C'hoi;;ka ..•••••••••. ______•.•••• __ ••••• _•• _. ___ ..•• 142 Fruitland ..• ____ ••••.•••.••.••..••••.•.• _..•.. _•• 128, 132 Cleveland .•. __ •••••••• ____ • ___ ._ ••..•• __ •• __ ._..... 112 Coconino site .•• __ •....•••••• ____ •••• _. __ .• ____ •..• _ 171 Glen Canyon site ..••.•...••.••••• 145, 146, 147, 148,249,250 Columbus 1\!t. site·------···--·-----· 115,116,121,249 Goosenecks.. • . . • • ...... • • • • . • . • • • . • . • • . . • • • . . • • • 1-15, 148 Concho Lake .•.••..••• ------•••••••• __ ••••••.•••. 155 Gorsuch site ••..•. ------·-·------133, 136,249 Coolidge ....• _._ •.• ___ •• ______•• __ •••• _._._.... 176, 179 Gr&~~by ••••••••••..•.•• ----.------••• _.•• _•••• 126, 128 Cottonwood Lake No.1. .. ------128 Grand View site .....•....•..••••••••••••.. __ ••.•• 132, 136 Cottonwood site ••.•....•. ------···------134,136 Great Bend site •.•.•••...... ••••.•...•.•• 145,146.148 Coyote ~ite •• _. ------•••••••••••••••• _••.•.•. _.•. 134, 136 Green 1\lountain •••..•..•...•.••..•.•• 126,128,130,225,226 Crow Creek 8ite •.••••••••.••••••...... •.....•.•• 117,121 Ground Hog ..•....••.....•••..••.••••••••••• 128,140,145 Cust~r site ...... ____ ••....•.• __ •. _..••• ___ •.•••. 133, 136 GurleY------128,134, 13G 291 \ WATER SUPPLY 293 \ Page ' "· Page Taylor Park •.•.•••.•• _••• _•••••••••. ____ • _. ______225 Vallecito ..•....•...... •.••.••••••••• 140,142,144, 2U...247 Tdt. site .. ______. ______.• _____ • _____ . __ • 144, 148, 247 Vega. site·------······ 131,136, 246,)4.~ Thornburgh site .•...... •...... •...... •. 115,121 Virain City site••••• ------159, 160,248, 249~ Three Forks site ••.•• ___ ••.•.•••.•••••••••••• _... ••• 116 Weminuche site .•••• __ ------..... ______._ 150 Tomichi Creek site .•••.•.••.•••.. ·------132,136,249 West Fork San Juan River site______148 TorgPson ..••••• __ • _------•••• ------.....•• __ • 142 Torrey ;ite •••••. ______•••• ______•• ______146, 148, 249 Wheatfields. ------____ ------.•• _____ . ______. __ · 142 White Mt. No. L •• ------155 Totten Lake site------145,148 White Narrows site ..•.•....• ___ •.. ------__ . __ . ___ . 160 Trout Lake •.•.•••• ! ...... ------128 Whitewater site ••••••••••• _•••••• ______•• ______136 Twin Potts. __ .---··_ ••• ______------••. ____ . __ •• 112 Wildcat site ••.•••.. ------"------156,248,249 Tyzack site ..•• ------117,121 Williams Fork ______------______. ___ ------128

Willow Lake._------__ • •••• ______111 l'daJL ••••• ___ .• ______------___ -----.. _. ___ . _---- 155 7 Willow Creek site, Price River ______156,248,249 Uinta No.3 •••• ------···--·---·------Ill Willow Creek site, Clear Creek______121 Upslco site..... ------·--·-·--·-·------116, 121 Upper Bear site ••.••••••••••••••••••••••••••••••• 115,121 Yampa Rh•er No.4 site______115 Uppt>r I,ake 1\lary...... 155 ~uni. _. __ • ______• ______• ______155 Vpper Yampa No. L. ------•·· 111 APPENDIX II

Eleven Colorado River Basin Maps

TITLES

Water Resources Development-Colorado River Basin­ Water Resources Development-'-Colorado River Basin­ Arizona Utah Water Resources Development-Colorado River Basin­ Water Resources Development-Colorado River Basin­ California Wyoming Water Resources Development-Colorado River Basin­ Principal Power Systems-Existing and Potential-Colo­ Colorado rado River Basin Water Resources Development-Colorado River Basin­ Conservation Areas and Facilities-Colorado River Basin Nevada 1\fineral Resources-Colorado River Basin (two maps) Water Resources Development-Colorado River Basin- 1\"ew Mexico