|
<br />Mancos Project
<br />
<br />eecreation and Fish and Wildlife
<br />
<br />.ckson Gulch Reservoir has a surface area of almost 220
<br />acres at total capacity. It is stocked with trout by the
<br />Colorado Department of Natural Resources, Division of
<br />Wildlife. There are many good sites for camping and pic-
<br />nicking. Hunting is permitted in season, and deer and
<br />elk are plentiful. Visitor days totaled an estimated 21,900
<br />in 19n.
<br />
<br />PROJECT DATA
<br />
<br />Land Areas 11977)
<br />
<br />Irrigable area:
<br />Supplemental irrigution service lapprox.1 ....
<br />Number of irrigated farms....... .. .. ......
<br />
<br />K.hlO acres
<br />(II
<br />
<br />Area Irrigated and Crop Value
<br />
<br />Year
<br />
<br />Area irrigated.
<br />acres
<br />
<br />Cmp value.
<br />dollars
<br />
<br />19611 7.1113 465.484
<br />I96Y 7.%1 4S8.919
<br />1970 B.(I0() 461.171
<br />1971 8.079 490.229
<br />1l.)72 ~.lOi S2b.:\h7
<br />.(n:~ ll.2:W 585.870
<br />974 8.197 4U4.318
<br />197:') 8,144 477.1:W
<br />.976 8.217 llUIJ.lJH2
<br />97i 16.975 1185.11.')
<br />'Colorado Rivt~r runoff was tht,_ lo....est in hI ..ears o! record and in most
<br />areas of Colorado pr('cipitalion for the year \~as considerably below
<br />average.
<br />
<br />Facilities in Operation
<br />
<br />Storage danls . . . . . . . . . . . . . . . . . , . . . . . . . . . ,
<br />I)i\it~r\',i{m dam;;, . . . . . . . . . . . . . . . . . . . . . . . . . ,
<br />Canals............... _................,
<br />Laterals..................,............ .
<br />I) rains ..........,......................
<br />
<br />I
<br />4
<br />97 mi
<br />40 mi
<br />2 m;
<br />
<br />Climatic Conditions
<br />
<br />Annual prl:'cipiunion ....................,
<br />Temrwrature:
<br />l\laxinlurn ..............................
<br />Mininnlnl .,...........................,
<br />Mean ......... .........................
<br />Growing- season. .................... ....,
<br />Elevation of irrig-able area. . . . . . . . . . . . . . . . ,
<br />
<br />15.<> in
<br />
<br />96 of
<br />-26 of
<br />4() OF
<br />12:~ days
<br />MlHI-77UU.O ft
<br />
<br />ENGINEERING DATA
<br />
<br />Water Supply
<br />
<br />eEST MANCOS RI\'Ut
<br />
<br />Drainage area at gaging station 4 mi down.
<br />. str!'am from diversion dam..............
<br />nUlla I dischar!!,~:
<br />Maximun1 \ !lJ411 .................
<br />Minimum 1 IlJ;}] I .................
<br />
<br />Avt'rage ................................
<br />
<br />42 mi2
<br />
<br />~,"l.:\\l\l an(,-ft
<br />12.220 acre-ft
<br />27,490 <H'ff'-ft
<br />
<br />Storage Facilities
<br />
<br />JACKSOi'\ GUI.CH DAM
<br />
<br />Type: Zoned earth!i11
<br />LJcution: Offstream in Jw:kson Gulch about
<br />;j mi north of Mancos. Colo.
<br />Constructillfl period: ]941.50
<br />Date of first storage: March tH, IIJ49.
<br />Reservoir. (Inflow is from the West.Mancos
<br />River thnlUl!:h the inlet eanal.l
<br />Average unnual inflow. 1949-i2 "..........
<br />Total cupadty to EI. 7825.................
<br />Active capadty ................,.........
<br />Surface area. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
<br />Dimensions:
<br />Structllru] height. . . . . . . . . . . . . . . . . . . . . . . . .
<br />Hydrau]ic height...............,.........
<br />'I'op width. . . . . . . . . . . . . . . , . . . . . . . . . . . . . .
<br />Maximum base width. . . . . . . . . . . . . . . . . . . . .
<br />Crest length............... ..............
<br />Crf'st elevation ..........................
<br />Vohtnle .....,.,........................
<br />Spillway. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
<br />Outlet works: Concrete conduit thrOllgh base
<br />of dam to emergt~ncy g-ate chamber. a :~h-in
<br />steel pipe controlled hy two 24-in hollow-jet
<br />valves at downstream end.
<br />Capacity at 1<:1. 782S . . . . . . . . . . . . . . . . . . . . . .
<br />Foundation: Sound Dakota sandstone", near
<br />the abutmenls rangin/-( through sandy
<br />",ha]es to soft shale neur bottom of gulch.
<br />Special treatment: Grollt curtuin beneath
<br />cutoff wall; supplementary grouting at left
<br />abutment and around outlet works gate
<br />ehamber.
<br />
<br />Carriage Facilities
<br />
<br />INLET CAi'jAL
<br />
<br />LJcution: From point on the West Mancos
<br />Hiver ubollt "7 mi northeast of Mancos,
<br />Co]o.. generally southwest to Jackson
<br />Gulch Rei'letvoir.
<br />Constructilln period: 1944-49
<br />
<br />Leng-th ...,...............,.............
<br />Capacity....................,."."." .
<br />Typical maximum st'dion in earth:
<br />Bollum width. . . . . . . . . . . . . . . . . . . . . . . . . . .
<br />Side s]op('", ..............................
<br />Water depth ............................
<br />Typica] maximum section, bench flume:
<br />Bottom width. . . . . . . . . . . . . . . . . . . . . . . . . . .
<br />Side slopes: Vertical
<br />Water depth..................,.........
<br />Lining thickness. . . . . . . . . . . . . . . , . . . . . . . . .
<br />
<br />OUTLET CANAL
<br />
<br />L.lCation: From Jackson Gulch Dam gener-
<br />all\-' southeast to the West Mancos River.
<br />Cons'tructilln Iwriod: 194:~-.jo
<br />Length................................ .
<br />Diversion capaeity ......... . . . . . . . . . . . . . .
<br />Typical maximum section in earth:
<br />Bottum width..,......... . . . . . . . . . . . . . . .
<br />Side slope"'.......................... ....
<br />Water depth ..................,....,....
<br />Typical maximum section. bench flume:
<br />Bottom width..,.. , . . . . . . . . . . . . . . . . . . . . .
<br />Side stoPt's: V(~rtical
<br />Watf'r depth ............................
<br />Linin/.(" thicknf'ss , . . . . . . . . . . . . . . . . . . . . . . . .
<br />
<br />O~279
<br />
<br />3
<br />
<br />7,400 acre.ft
<br />10,000 acre-It
<br />1),<)50.5 acre-It
<br />216.93 acres
<br />180 It
<br />160 It
<br />:\5 It
<br />920 It
<br />1.9110 It
<br />i8:H.{) It
<br />1.710.OtX) ydJ
<br />None
<br />
<br />280 fels
<br />
<br />2.6 m;
<br />25M leis.
<br />12 It
<br />1.5:1
<br />4,5 It
<br />10 It
<br />4,83 It
<br />, ;n
<br />
<br />2,2 mi
<br />20i ftl/s
<br />12 It
<br />1.5:1
<br />4 It
<br />10 It
<br />4 It
<br /> in
<br />
|