MISSOURI RIVER DIVISION OMAHA DISTRICT SUMMARY OF 1969-70 RESERVOIR REGULATION ACTIVITIES
i c! i MISSOURI RIVER DIVISION OMAHA DISTRICT SUMMARY OF 1969-70 RESERVOIR REGULATION ACTIVITIES
SECTIONS
I. PURPOSE AND SCOPE
II. RESERVOIRS IN THE OMAHA DISTRICT
III. WATER SUPPLY
IV. RESERVOIR ACCOMPLISHMENTS
V. RESERVOIR OPERATIONS
VI. REGULATION PROBLEMS
VII. RESERVOIR REGULATION MANUALS
VIII. DATA COLLECTION PROGRAM AND PROCEDURES
IX. RESEARCH AND STUDIES
X. TRAINING AND METHODS
XI. PERSONNEL AND FUNDING
INCLOSURES
1. Map of Flood Control Dams.
2. Project Data Sheets.
3. Water Supply Map.
4. Regulation Sheets for Past Year.
5. Manual Schedule.
{1\ MISSOURI RIVER DIVISION OMAHA DISTRICT SUMMARY OF 1969 - 70 RESERVOIR REGULATION ACTIVITIES
I. PURPOSE AND SCOPE
This report summarizee reservoir regulation activities at those
Missouri River Tributary .Dams where the Corpe of Engineers is responsible
for prescribing regulations for the use of all or a portion of the storage
zone. The descriptions are brief and include only those regulation
activities of significante in accord with ER 1110-2-1400. The period
coTered is from August 1969 through July 1970.
II. RESERVOIRS IN THE OMAHA DISTRICT
a. There are, at this time, 28 projects in the Onaha District falling within the scope of this report. Sse the map on inclosure 1. Of the 17
Corpe of Engineers projects, 15 can be considered as providing flood control
regulation without mechanical regulation of gates. Flood storage in these is discharged without regulation action until the base of the flood control zone is reached. At most of these however, some minor gate regulation can be performed in assisting drawdown or in providing water supply. At Cherry Creek Dam, near Denver, Colorado, all releases of water are scheduled and
performed through a gated outlet works with due consideration for all
project functions and downstream conditions. Also at the small Bull Hook
project protecting Havre, Montana, flood storage is released through a
gated outlet works as soon as local runoff ceases. In addition to the 17
Carps Dams listed, twos ubimpoundments of the Missouri River Dams are re-
gulated but are not included herein in further detail. The Spring Creek
subimpoundment, lake Pocasee, is on Oahe lake. The Snake Creek subimpound-
ment, Lake Audubon, is part of the Garrison ~ject.
b. There are 11 Bureau of Reclamation projects with authorized flood control zones. At 7 of the projects the flood control space is so located that mechanical regulation ·iB possible and necessary through the entire zone.
Releases can be controlled from zero up to the capacity of the outlet works.
At the other 4 dams, Boysen, Heart Butte, Keyhole and Shadehill, all or a portion of the flood control zones are located above the crest of an un- controlled outlet works or above the top of gates. In general, the exclusive flood control space at all projects is evacuated as rapidly as downstream
2 channel capacities and flow conditions permit. At those projects with annual or joint use flood control space evacuation and refill of space is generally made on a forecast (mountain snowmelt) basis. At one project (Tiber), fiood control regulation was temporarily- suspended in 1966 due to limita tiona
placed on the spillway-.
c. The 28 projects are listed below. Engineering data sheets for each dam are inclosed. See inclosure 2.
CORPS OF ENGINEERS BUREAU OF RECLAMATION
1. Bowman Haley Dam 18. Bo;rsen Dam
2. Bull Hook Dam 19. Canyon Ferry- Dam
3. Cedar Canyon Dam 20. Clark Cany-on Dam
4. Cherry- Creek Dam 21. Glendo Dam
5. Coldbrook Dam 22. Heart Butte Dam
6. Cottonwood Springs Dam 23. Jamestown Dam
7. Kelly Road Dam 24. Key-hole Dam
8. ,8alt No. 2 25. Pactola Dam
9. 11 11 4 26. Shadehill Dam
10. II 11 8 27. Tiber Dam
11. II 11 9 28. Yellowtail Dam 3 CORPS OF ENGINEERS (Cont 1d)
12. Salt No. 19
lJ, " " 12 14. " " 13 15. " " 14
16. " " 17
17. " " 18
III. WATER SUPPLY
Precipitation over the basin waa variable. Tributar.r water supply ranged from below average over much of the plaine to much above average in the mountains.
The winter snow accumulation followed the same pattern in general as the total precipitation. The Bighorn Basin was an exception to $he generally high mountain snow accumulation. Runoff into Boysen Dam was 74% of the average. (See incloeure ll· Mountain snow course readings were near record highs in parts of the upper
Missouri Drainage, and in the South and North Platte River Basin. The Northern
Black Hills of South Dakota also had record high winter enow fall. In contrast to the heavy mountain snow accumulation, the plains region generally had below average snow cover and deficient warm weather precipitation.
4 IV. RESERVOIR ACCOMPLISHMENTS
a. Cor!l!! of Engineers Dams. The genera:U,. deficient rainfall through the
plaine region resulted in limited flood control action or benefits at the Corpe
dams. A lack of heavy snow cover and high intensity rainfall kept peak infloWII
at a relativel;y low level at all sites. However, base floWII wre sutticient
to keep all conservation pools at an acceptable level. Lake levels entered the
;year fairl;y well full as a result of the previous good water suppl;y ;year.
Recreation and Fish and Wildlife activities were full;y served.
b. Bureau of Reclamation Dams. A)Ove normal mountain snow cover aJXI resulting
high runoff resulted in significant flood control benefits from the regulation
of q. dams fed b;y high altitude runoff. Clark Can;yon, Can;yon Ferr;y, Yellowtail
and Glendo Dams were credited with preventing substantial local flood damages
as well as assisting the Missouri River Dams with benefits on the Missouri River
itself.
V. RESERVOIR OPERATIONS
(See the indifidual operation sheets - Inclosure I+ - Pool levels are month
-end readings and outflow.1where shownJare monthl;y ~verages).
5 V. RESERVOIR OPERATIONS ( Cont 1 d)
a. Corpe of Engineers. None of the b. Bureau of Reclamation. Al.though much or the mountain snowpack and resul.ting runoff was very high, no flooding occurred within the downstream control. of the effected projects. Sufficient storage space had bsen provided to store the runoff. The runoff pattern occurred as anticipated. In the upper Missouri and Yellowstone River bas.i.ne, no major rainfall storms occurred during the critical. period of snowmel.t runoff. Ho-ver, two major rainfall storms did occur above Bureau projects. One was above Heart Butte Dam in North Dakota on the 8th and 9th of May. This resul.ted in a record peak infl.ow into that project. The other was in the area of Gl.endo Dam in southeast Wyoming on the 11th and 12th or June during the time of heavy snow runoff on the North pJ.atte. This resul.ted in a record high pool l.evel for that project. Regul.ation for main stem repl.acement storage was suggested and made in Tibsr Reservoir. 6 VI. REGULATION PROBLEMS a. Inadeouate Channel Capacit:r. The discharge capacity without property damage of the river below III8J1Y' flood control dams is much less than was con- sidered in project design. This is due for the most part to human and natural encroachment since the project was constructed. However, there are also in- stances where existing inadequate downstream capacity was ignored in project design. b. Easements. A close and continuous watch must be~msintainsd on the numerous requests for easements for the use of land within the reservoir taking line. This is time consuming since no clear cut policy exists. At the same time it is necessary to prevent construction which would hSnder reservoir regulation. c. Data Collection. The large areal extent of the Qnaha District compli- cate hydrologic data transmission. The 418,905 square mile area extends over 1,000 miles from the reservoir regulation office in Qnaha. See Section VIII for additional details. d. Recreation Facilities. Recreation facilities at many of the reservoir projects are being constructed within the lower levels of the flood control zone and are subject to frequent inundation from stored flood waters. These facilities have placed operating restraints on the elevations and duration of reservoir flood 7 storage at several of the Corps and Bureau reservoirs. Trailer camping areas and permanent buildings are being constructed in the flood pools at elevations which will be inundated with even minor inflows. A number of trailers were flooded in the Heart Butte reservoir this year, fortunately without lose of life. The continuing recreation developnent in the flood pools should be curtailed. VII. RESERVOIR REGULATION MANUALS - See Inclosure_L VIII. DATA COLlECTION PROGRAM AND PROCEDURES. Paragraph VI mentioned data collection difficulties .ue to the large area of the Omaha District. Our present data collection program utilizes telephone and teletype transmission almost entirely. Essentially they are considered land lines although it is lmown the telephone company uses micro-wave facilities for some of the transmission. The National Weather Service plays a prominent part in the collection and transmission of the river and precipitation data. The Omaha District has 2 Weather Service printers and a facsimile machine for receipt of the data. River and precipitation data originate from both observers and telemeters, We are continually engaged, as funds are available, in the installation of tele- phone telemeters. At the present time, including weather service facilities, 8 there are 57 telemeters in the cm.aha District. We have plans for about 70 more. In addition to the Weather Service teletypes there is a backbone teletype system connecting each of the six Missouri River DBDI8 to the cm.aha District and the Missouri River Reservoir Control Center. This is used for both the transmission of data to the Missouri River Dams and the receipt of hydrologic , of'~o•~. 1:+ IS. ~...... and other data which has been collected by theAbaoked-up by an independent <.Af necessary. IX. RESEARCH AND Sl'UDIES Current studies _, the Reservoir Re~on Section and others include: a. Reservoir inflow studies utilizing mountain snow stations. The Soil Conservation Service, the National Weather Service and the Bureau of Reclamation are also studying and improving procedures. b. Multiple reservoir system regulation sche4ults. Two multiple reservoir systeiiiS are now under construction within this District; namely, Pipetem-JBDI8s- twon system in North Dakota, and the Cherry Creek-chatfield-Bear Creek system in Colorado. The Pipestem-JBDI8stown system will combine a new Corpe reservoir .and an existing Bureau reservoir. A preliminary system regulation schedule has been 9 developed and coordinated with the Bureau. The final schedule will be prepared when the design o! the outlet works o! the Pipestem Dam has been finalized. The"Corps only" reservoir system o! Cherry Creek-Ghat!ield-Bear Creek is currently under study. I, TRAINING AND METHODS fv-05 Vt'f>!,l'f, Training $tit I as the workload permits. Schooling o! new personnel by the Reservoir Refllation Section is on a continuing basis. Inexperienced employees are utilized in various capacities in order to widen their field of use!ullness to the section. Experienced pel'ltonnel, through work rotation and training courses, increase special technical skills. XI. PERSONNEL AND FUNDING. a. Funding of the activities of the Reservoir Regulation Section are made solely through 0 & M Fund appropriations under the various project accounts. Funding for FI-71 is adequate for current needs. Funding of monies transferred to the U. s. Geological Survey and U. S. Weather Bureau in support of the coopera- tive stream and precipitation reporting program are also obtained through project 0 & M appropriations. Funding is adequate !or FI-71, however, increased station operating costs and repairs to existing stations will require that additional 10 funds be provided in future years. b, Retirement of two of the top key personnel in the Reservoir Regulation Section has adversely affected the work output of the Section. Reorganization and recl'Uiting of replacement personnel is in progress. Delays in preparation of reports and manuals will be encountered until replacement personnel are available and adequately trained. 11 N ------~----- t BOUNDARY l CboRPS OF ENGIIJ"?;iS I QJURE~U OF Rf.CJJ.~.:;.T~ · '\ T H Rn>tr FLOOD CONTROL DAES .OMAHA DISTRICT MAP 1,1 S ARIIV [N~'M(A t'ISH-~T- O•u ..... SC"ll IN ... ILlS CO~PS Of- (~':.·,.H•S ' lC 100 o"''"'· HtQ•s .... .I '·• I i i I n ll ~ III I 1 I II ' I I WCAUON OF DAM.· I I I I j I I I I I I I Tb1s proJect waa authorized tor .the pUr~ ct.floo4,contro11 lllunicipal i. Water auPPl.T, geoerai ''IIU.dliitl j inU.u~trial reoraat1~.. ·, ~ tt~~~ixt I ,_{. J;· •. ,: ··:, ,.·_.,. recreation; {.,. ; .· .. l ··.·. ;.,; . -1~:1·;~:;~~;.. ,:- ,·~:--x I ;'_--.- --· ~; •; j j :~.<_"{· II aquare I I 110 RESRHVOIR DATA ALLOCATIONB'· (ah~,,~~ ~lift·) f:;~;;!:,~· I i ' :._;,' ··-·:.<::.. • . . <~_;;,.. _· - -•', .- 'l·r.~J:·.;; ·i';_;_ .:t. . ~- .. : ,· "•;, _: ElevatiOn .. ,;;;.t:Jrta•.c .. ,.. ;j:.·, Incre~ntal· Item . ' Ft•... ;.\ $totap.,1::::; i·,, Stor~ge . m.s.i•: ,, : :. '.r.A~Feet; ''f' {,; Acre-l.i'Mt - ':. -~;~ ~;;) l·b:Ki:r.wn ,_··;c)t,:,:·-. l?ool ··f27a9.Q·.-.. - .• Sw:cho.re;e Storage' Spillway Cx·eBt · · · . , .. 2TI7 .;O Addit:i.onul Contro1l.ed.·Storag& Top Flccl Control ZOne 21'73•0; Exclud.ve Flood Control; .., ··. " iZtoclinJCnt Stoi:ai;ie 1n Flood Top of Conservation .~ .. Y· ·; \~£rr?5~,~~~~'f;'!ft··d\ll{\~~~~t~AX·W,~);};<· Active Storage _·.· -:~_-'_:~·-·-::\I~:(.~ .Sf,;;~_ _,:·-:::!. :.;:",~: :: · ::::::.- --J ~_:---;:,~-:-~~:~:~~1f}o;!;':~~~'Y'~~~,f~::::~:~;~:~~~::c;~f~~<- ·,\:·,·_.· :: · c'!ed.ii!l!nt Utoratta -m-- ·-- --·- -!- --'. ·• .•-,- :, ")· ,, __ - ?!---1· ·,.:.;;, ·~ ·? ...•• -,+ --! Pl··"·t·t;:;:"-·,, ....,.t, ·. · t-·· ~-· · .. o~ , . - --> --- - .. ~- -~,- _:.::.. ...:;·~--~~ ··-i~---u~_-;p. __ :;:.J1·:~o/·;;r.:.~~~~-:t~~r~; __<:·: ~-(-:i Conne-rvatiOD zone · ·.,. ..- · -:~1-,.,.- .. ~~------·,--!~:-·~·"\-'"""' 'o!}~----·..-.·--·- -,t ;"_,:-. · 4,0)0 ; ·:}?" ; · ~- . : "";. ,.. , "' ':, ;~r»'• ~~f'~l'~jf&ti" ',-, .. " .-.: '' . ',).~ >' i . ,, .-- ' :·:-:· .,. --.··· 'J •.•• . . \; ;:~·- ·\·<"''·-·- ... ·,_. " · :8owP~4'1/ JMtep r· . . . . ., ~:xmvo:m DATA (1961 Capacity '!'able) I! ,,_' :!Ili ,., Jl Elevation Gross Area, { 0:-oaa Storage • Ihcrementnl . 'I Pt. m.a.l. · i: Ae.; ,;;;:;,;; · . Acre·l'eet · Storage AF , . '.:, . !I ; Jl Top o:1' Dam 9TIO . ~ i I Top of Pecien Pool ·. 8130 Curcl:>ACge Storage i ., Top ot Controlled Storage 2781•0 .· · 6050 (Top of ~'use' t'lug) Additional Controlled Storage To:v Floo.i Control Pool 2777 .o / 5167 (!:margcncy Sp1,llway Cl'eat) Exdu1.1ivo Flood Control .. ~ ·' :J Sod:l.nxmt Storage in Flood Pool · 'l'op Cont\Crvat1on Pool . 2755.0 1772 (Crest of Service , ·~. . Spillvay) . ·•· '; . ,. Cozwervation StQrage .· . . SotUment storage . Invert of Outlet Works 2'(4o.o '.·· ,·:. Com\ervotion Storage Scd1:me"t Storage St~·eam ted · . 2715~0 '. Total Rainfall Volume, 90 houra · 1n. In:!. t:t:al I.oss in. Infiltration Rate, per hour in.·. Pcuk inflow rate ·. ·· .. ··: ·.·'.· .·· ...... ,.,...,.... c.-f.s. · Volume of Hunoff (3021000 AF) ' in. Recnx•voil: Routing baoed on Reservoir Ca:r>ac:11;1i':, .{' Depleb;d by Sediment a. Me.x. Pool Elevation b. Ml:.::. cor.ibired discharge · ... : . · (l~mergenc:y SpiU.vay • ~,971 (Berv1ce Sp1l1way • · · 3,206 . .£~IA F0.\1 STAI\'DA.RD !'ROJ!CT ·PLOOb ·· · (l'otal. Rainfall Vo1UXIII, 84: houri >. ·. 7;35 in. ·:rn1tial !.oso . .• .... ·. ·, 1 1n. Ini'iltration J:late1 per hour : 0.15 in. Penk intlow rate . . ·. '1>6,1WO Coi'.a. Volu® ot !hUlett (122, 700 All') · 5.16 ill; ' · Reservoir Houting bailed.· on Fleservoir ..,.,.,..,""''¥· ':r( ~~:cl~!~" ·~;oi"~i:v!~ion (no e1re1·genoy "l""""""""'¥ ...... , ;.''/': ·s,'}. g].~~c: 1.>§. !'t;, lll;lh 1. b. .:,itt:~,. Ccnabincti Dicebttrs-e . ,: ·'.1 ·u~ c."',.s*. ... t~t -.r·-~ .. l·_<:~o,., .. ,"tr t·!.,o:11J:•.t~-.:.r- ... O ro -1' ~ ) "------..... '·-··· ·~·-~ ... }'""·"'·"" .... .t'~.. ,ft{OI"- ...... u. {~: .i"Vimt Spillway ... 2949 o.z.s.) ' .- ,} ~. ,. .' ,..,_;, ... ,., ...... -DAM 'rype . R4led Earth Fill lt.'lximum height above river 79·0 ft. Creot lenGth · ~730 .t't. .·_-·;_,_ Type ·;~(c ~~ Covered Uncontrolled· no~ .· ·Bottom lWJ.tb ,. :·,· ,;<, , , ,: 650 tt. Sid.o Slop~IS ·(·:<;'-:·: :. t.~:/ ~, .~:- :·· 1 Oll 3 Crest clavation Top of Fuse Plug <' ,;l S':HYICE SPitLWAY ·:t'~~;· ..··•.•• •.:.r .•:.. : ..: ..... ) ;\.~.:.:~. ·;.· ...... ,, ... ,.··,<·:~. 5 ' TJ11r3 ·,.. · ·• '''· Uncoll~Ued ·M:>rn1ng-Glo;:·y 'l''tiro,;1; Diarreter . .: ;·~~'~: ' , Co11J.uJt DinJreter , .!,':.~·-.::_;. ·'i::'-·,·'.'. Cond.ui t Lengt.h ,• .,;-j '; Cl-eat Elevation ·:·-···:: u,.stream invert. e1evat1o11. (P.!~) '; DowilStream i11.vert elevation . ' Capacity (Elev •..2773) ,.,; ~- ·; , (Elev. 2781) ..... ·~~-. ''\{:~ ,,, ,,.,: ;:,·'·,_ •':· STILLVIG DA<;m ;'{. Width ,~s 2~ tt. Length~Drop SeotS.on ; 5'{ :t't, :,i·· '"t,., " e::a .p.,.. ~ngth~Basin .., '\ , "" ...... Floor Elevetion ' Top Baliilin s1a.e Walls ; ·· · .. ;. ·f:!'i"~~~ ~: ::::i:·. '· ,•1'-:•;·, .. ,."·-· -.~1 ··'· ,. '/.''~~-;~:~:-::' ·· •;, W$1i'v~ll, te)t!tun ,gate valve ' .. :. \·' ,y;:. c()lltl'o11~ ~¥ wellJ d1scllilr~ ): 0' :. ~:: ~ ,II~!Nt 11t11lway eorutui~ ' Conduit Di£,meter Capacity, COili'Ot'VIilt:l.oa pool Control · Tro!!h reck invert el.evat1oti .i.\ .'j." :. ~ ' . f ··:;, •.• ~·; :·· J: r -~'- ··' . PRoJECT ·''·"," :. .'· T ---.-,< LoCATION. : : I. CONSTRUCTION CC~a'I.ETED: .. October 1955 Top ot Dams. ., > Connecting Channel Spillway Crest '' ~ '. '· ' . ··2583.0 tt. • 11 OOTLET wow DIVERT. :. 2563.3 tt. Bull Hoole . :~ - ---~·---..;, j·•' ,, Max. Water Surtace • • I ·' 26o5 .o ri:.. ;:10470 -;' ' . Conneci;ing Channel '.;,J I• 2586.0 tt. I'·.· '",', . -l -/'-: ',·":~ . 2583.0.tt. {;.:.;> I I I '+_;· (\ \ '\' '," CEDAR CANYON DAM RAPID CITY, S. DAK. Pertinent Data PROJECT: Cedar Canyon Dam LOCATION: 3-1/2 miles west of Rapid City, S. Dak. Post Office CONSTRUCTION CONPIETED: Sept. 1959 DAN EHBANIQ'JENT: Type - Compacted earth fill - both sides riprapped Length - 1320 ft. Height - 42 ft. (maximum) Crest width - 15 ft. Side slopes - 1 on 3 Crest elevation - 3554 ft. NSL SPIU.WAY: Type - Remote uncontrolled vertical rock cut Width - 60 ft. Ll!ngth - 650 ft. Crest elevation - 3545 ft. MSL Capacity - 1120 cfs at 3550 ft. MSL OUTLET WORKS: Type - Uncontrolled corrugated metal pipe Size - 24 inch diameter Intake elevation - 3526 ft. HSL Capacity - 49 cfs at 3545 ft. MSL STORAGE: Top of Dam 3554.0 ft. M.S.L. 270 AF Spillway Crest 3545.0 ft. M.S.L. 136 AF Sed:iJnent Pool 3526.0 ft. H.S.L. 13 AF 1 HYDROLOGY: Drainage Area - 261 acres Standard Project Flood - Max. inflow 1120 cfs - Volume 155 AF Probable Hax. Flood - ~lax. inflow 2!560 cfs - Volume 420 AF .:.· j .. 2 SI..MIAm: OF F!filliNEERlNO MTA - TRlB.l'fAAY JEIERAL ReSERVOIRS IN a.IAHA DISTRICT HEAm BJ'I'I'E DAM* JAMJ:;'I'(Mf* GLENOO* ""'NO. """'CT CANYON FERRY* =· """'"'* & LAKE TSCHIDA SIIADEHII.I;" COLD BROOK PACTOIA* KEYHOlE• """"' """' 1 Location of dam 15 Mi. of Helena, Mont. 15 Mi. Sll of Chester, Mont. S of 'I'hei'JIIOpolis, Wyo. 15 Mi. S of Glen Ullin N.D. o.e Mi. W of Shadehill, S.D. 1.25 Mi. N of' Hot Sp'gs, S,D, 15 Mi. W of Rapid City, S.D. 12 Mi . NE of Moororof't, wyo. If of' Jamestovn, N.D. 10 Mi. SE of' Denver, Colo. 4.5 Mi. SE of' Glendo, Wyo. '""""" ,_,1 "'· North Platte Mi. 280 , River and mi1ee.ge Missouri'· ML 2389 Mu-ias Mi. 71 "'"'·Big Horn Mi. 295 103-5 Cold Brook ML 1.2 Rapid Creek ML uo Belle Fourche 580 Cherry Creek .... u.4 "'· l5,4oo 3 Drainage area in sq. mi • 15,900 4,850 7, 710 1,"""" 760 "'· '~'3,ll5 "'·"' 70-5 319 1,950 1, 300 "'· 4 Re"servoir length & corres· "" "" 15 miles 4635-0 pending elevation 25 miles 3800.0 25 miles 3012.5 17.5 miles 4725-0 12 miles 2094·5 10 miles 2302.0 1.2 miles ]646.5 4.5 miles 4621.5 10 miles 4llL4 4o miles 1454-0 3-2 miles 5598.0 Loaa.tion of dam tender On site On site On site On site On site Automatic operation On site Pactola Reservoir site On site On Bite On site l Bank-full travel tilDe to ,_ Missour:!. River 4,5 days to .Fort Pack 1.25 days 2 days 3-5 daya 3 days About one month N/A N/A MaJt. discharge of record 5 """" 7 Aug. 1933(lO) near damsite 47,000 cfs June 1908 40,000 cfs June 1948 """'29,800 cfs July 1923 25,000 eta March 1947 58,000 cfs April 1950 8,400 cfs Sept. 1938 2,200 cfs May 1952 12,500 eta April 1924 6,400 cfs May 1950 34,000 cfs 30,000 c:fs June 1908 DAM AND~ 8 Top of dam, elev. in ft, 380€-5 3021.0 4758.0 2124-0 2]18.0 3675-0 464o.o 4134-0 1471.0 5645.0 4675-0 Length in f't. (excluding 9 1 4 8 2,096(12) dikes) 1,000 4, 300( ) 1,143 1,850( ) 12,84o(6) 9'5 1,300( ) 3,420 1,418 14,300 10 remming height in feet 150 144.9 679-5 34.5 21.2 86.5 1lll.5 63-3 54-0 108 ll M!ut:illlum height in teet 168-5 190 150 '24 122 1)0 li8 85 "'140 167 '2 Abutment fOrmations Metamorphosed shale & alate $h&1.e & sandstone Sandstone, shale & limestone Sandstone ... ,, silt !. clay Sandstone, shale & limestone ""Slate & schist Sandstone & shale Pierre shale Denver( Sandstone, cl.ay&silt) Sandstone & shs.l.e & Rolled earth Rolled earth 13 Type of :fill Concrete gravity~type Rolled. earth Rolled earth Rolled earth Rolled eo.rt:~. Rolled earth Rolled. earth & rock Rolled earth rock Rolled earth 2,676,000 14 Fill quantity in cu. , .. 407,100 ll,320,000 1,527,000 1,140,000 3.391,000 1, 072,C()Q 2,000,000 1,329,000 963,000 13,000,000 15 !8te of closure Mar<:h 1953 October 1955 October 1951 August 1949 July 1950 September 1952 August 1956 M!lrch 1952 May 1953 October 1948 June 1956 SPI!JliAY D\TA (Service} (&tergency) 16 Disclle.rge capacity, 150,000 54,000 20,000 5,650 5, 700 "'7,000 80,600 38,400 u,ooo 2,930 38,300 10,300 17 Crest elevation in feet"'' 3766-0 2980.0 4700.0 2064.5 2272.0 2302.0 ]646.5 . 4621.5 4099-3 1454.0 5598.0 4653-0 18 Width in :feet 2o4 (net) 222 (gross) 96 (net) 60 (net) 66 (gross) 27 ft. diBJD. at crest 1500 250 19.25 9-5 f't, diameter 67 (bottom width) 45 -- Ungated ogee-veir 19 Ge.tes, number, siZe & type 4-51 x 34.5 ft. radial gates 3•32 X 20 f't, radial gates 2-30 X 25 f't, radial gates Ungated glOry hole shett & Ungated glory Ungated earth Unga.ted"" sharp-created weir Ungated ogee-weir Ungated ogee·weir \Jng8ted glory-hole sha:rt Ungated side-channel canal conduit """' channel & conduit (trapezoidal) RESERVOIR ElEVATION & AREA. 20 3800-0 35,200A 3014.9 22,700 A 4752.0 30,770 A 2118.2 10,950 A 2312.0 12,150 A 3667.2 >r9 A 4633-7 1,350 A 4128.2 23,000 A 1464.4 20,000 A 5636.0 4,570 A 4669.0 23, )JO A --1 18,100 A 21 Top of :flood control pool 3012-5 22,200 A 4732.0 22,200 A -·5 6,625 A 2302-0 9,900 A 3651.4 198A 4621.5 l,220 A 4lll.4 13,700 A 13,250 A 5598-0 2,630 A 4653-0 -- -- 4580.0 4099-3 9,Jwo A Im:g 2,100 A 5550-0 880A 22 Top of conservation pool ~800-0 35,200 A 2973.0 12,500 A 4717,0 17,100 A 2064.5 3,400 A 22f:iO.O 3,6oo A 3585.0 )6A 860A 4455-0 8H 4051.0 9W A 14oo.o 100 A -- 4570-0 3,200 A 23 Top of' inactive pool 3728.0 ll,500 A 2967.0 ll,300 A qGg5.o 9,400 A 2030.0 800 A 2250.8 2,1300 A ------STORAGE ZONES, ELEV. AND CAPACITY 159,000 AF 4669-0-4653-0 330,000 AF '4 Surcharge storage Nooo 3014.9-3012-5 56,000 AF 4752.0-4732.0 523,000 AF 2ll8-2·2094·5 200,500 AF 2312.0·2302.0 109,000 AF 3667 .2·36116-5 4,54o AF 4633- 7~4621.5 15,800 AF 4128-2-4lll.4 285,000 AF 1464.4-1454.0 s636.0·5598.o 134,000 AF 25 EJtc1usive flood control 200,000 AF 273,000 AF Nooo 3012 ·5-2992- 3 '•{)(,,v:o AF 4732.0~4725.0 150,000 AF 2Q9lt.5~2064.5 150,000 AF 2302.0-2272.0 216,w., r,p 3646.5~3585.0 5, 74o AF 4621.5-4580-0 43,000 AF 4lll.4-4099-3 140,000 AF 1454.0-1429.8 5598.0~5550.0 81,000 AF 4653-0-4635·0 Annual flood. control & """""' 2 !llllltiple-use None 2992-3-2973-0 290,000 AF( ) 4725.0·4717.0 150,000 AF -- 2272.0·2260.0 50,000 .u.(7l None -- None -- "' -- 190,000 AF(9} 1429.8-1400.0 29,200 AF 5550.0~5504.0 15,000 AF 4635-0~4570-0 460,000 AF 27 Conservation storage 3800.0·372R.O 1,615,000 AF 2973-0-2967.0 72,000 AF 4717.0~4685.0 410,000 AF 2064-5~2030-0 6fl, 700 AF 2260.0~2250.8 34,oou AF 3585.0~3550.0 520 AF 4580-0-4455-0 55,000AF ~-3-4o5LO 800 AF None 4570-0-4508-0 65,000 AF 28 Inactive storage 3728-0~3635-0 436,000 AF 2967-0-2825-0 575,000 AF 4685 ,o-4615 .o 260,000 AF 2030.0~2oo4.o 6,800 AF 2250.8~2200.0 58,000 AF Non9 4455-0-4420.0 1,000 AF 4o51- o-4016. 0 10,000 AF 1400.0·1390-0 29 Grass storage, excluding surcharge 2,051,000 AF 1,337,000 AF 970,000 AF 225,500 AF 358,000 AF 6,260 AF 99,000 AF 340,000 AF 230,000 AF ')6,000 AF 798,000 AF OOTLET WORKE 1·21 ft, tunnel with: 30 No. & size of conduits 4-7 f't. die.m. outlet tubes 1 conduit vith: 1 tunnel with: 1-outlet tube on top of' spill- 1-7 ft. d1811!· concrete with 1~6.67 ft, diameter 1-6 f't, diameter 1-9.5:"8-25 ft, horseshoe 1 cut & cover conduit 2-8 x 12 ft . rectangular 3-13-5 ft. diam. penstock 1·72 in· die.m. outlet pipe 1~66 in. diam. out:j.et pipe va:y conduit. (Discharges in· steel liner upstream :froa Intake to gate chamber 1-12 f't. ilia. circular 3-12 ft. dia- outlet pipe 12~12-5 ft. dia.. penstock 1 ~ 13 ft. dHun. penstock 1-22 in. die.m. outlet pipe 1-15 f't. dia.m. penstock to spillway conduit down~ gate stru.cture. 2')2.5 f't. of 9·5 f't. die.. provided for future fine provided f'or future irr1· 1~8 x 12 twin box irriga- take off :from 15 ft. pen- stream :from gate chamber.) Gate chamber to stilling regulation. gation water & pumping tton eansJ. olltlet with stock is: basin 151.25 ft. of 13.5 energy 1·57 in, dia. outlet pipe f't, vide horseshoe radial ~r.,: H{t. 2-10.5 f't, dia. penstockS 5 31 Condut t length in feet lllO (72 in.) 1090 (22 in.) 237( ) 355 9"< 740 653.4 443-75 679-5 (ll) 2,300 2~5x6 ft. hydraulic slide 5-6X9 f't, hydraulic slide 3·7.25X7·75 f't, slide 32 No., size & type of 4~77 inch slide l-5x5:1't- slide 118 in. Hollow jet outlet pipe 1~4x5ft· slide 1~6x6ft. radial Unsated ports & bell-mouthed 2·2x91't. h;ydraul:l.c slide 2·3·5 X 3.5 :l't. slide service gates butterfly 1429-8 8,100 5598.0 ll,300 (without 4635.0 33 Capacity-cfs EJ.ev.~f't. 8, 300 3766.0 1,300 2973-0 ""'~'64.0 166 in. pipe) 4725.0 690 2o64.5 600 '""''250 (ports only) 3600.0 1,"" 4580.0 1,250 4099-3 2,175 670 (57 in. pipe) 4725.0 1,540 3651.4 pover plant) J4 Provisions for power 3·23, 500 HP turbines None 2·10,500 HP turbines None !lone None None None Project planned for future None 2 16,750 HP turbines 3-16,667 Kw generators 2-7,500 Kw generators power inst.al.la.tion 2 13,333 Kv generators $14,624,000 $23,000,000 35 Project cost $29,o60,000 $20,546,000 $34,234,000 $6,166,000 $11,041,000 $1,574,000 $9,174,000 $4,755,000 $3,848,000 Corps of Engineers, U, s. Army Co!npil.ed by Missouri River Division {1) Dike No, 1 • 17,000 feet. January 1963 (2) 290,000 AF of tnteri.ro supplementary storage (2992.3·2973.0). (3) Ultimate developnent includes completion of' the irrigation outlet tunnel and construction of the irrigation canal. {4) Dike No. 1- 2,eoo feet. (5) Spillvay conduit total length • 529 feet. (6) Dikes (2) 1,170 f'eet. (7) 50,000 AF of interim auppl.en!ntary storage (2272.0·2260.0). (8) Dikes: No. 1, 830 f'eet ~No, 2, 1,270 feet. (9) Includes 60,000 AF of' silt storage (4078-7-4051.0). ( 10) Castlewood dam failure · (11) Includes 1 for circular conduit. (12) Dikes: No. 1, 830 feet - lfo. 2, 1,270 feet. U.S.B.R, Reservoir i '. :-.... (·..'~ ;F: ~-: ~,;--.. • ;:_ 1: (- ;~:-'·:.·;:; ~--:: -~·.: ~~ . ~- ,; .·· ·· l'Jm'rP!W nA'l'A . •· ~ ' ,,.. · ~ '. • . , , . ,. -~-'~·::~::::,:~~~-:>:£:.;i:: ;: ; ·' -. L.'lCA'l'ION Of PAM . , . . · ' ·'c\•. t ,, h Cott.onwod Springs C~ok d&maite i.locate4 on Cottonwood ' I spr!np Creek a~te:4" 1/2 II1.'IAI ~ :1t.t ~menee ~tb • ,; ,., ' ' < • -' •'' '<;_ :-) '~ ' .,,, Hot !roak, •· tdbut&t7 ot Fall RiwJ>~~,·~ Rinr J!Uin. . The aite is 4.s milM wet. ot ko\.~~ ••: tall JU.ver County;< j J.ooaW ! •.-' I ~'";""..._.... . -i;~;1,l}i~f'········· ·.· .. ; to pl'CI¥1de flood FQtcctioa tor ~ ~ .. Soutb Dakota and II ' ' . ' . - ·. :.~:~~-~-'~ ..,:·". '1:·-·. alone J'al:1 B.iwr. M4itional. p1rpo... ,..,...... J'80Nation .txt fuh · II . . ? . _._, ._::·_s;,·, .: -, ... ,_ - alY1 wf3dHf8 ~t.!on. ' Jf;,/:~::;~i~('.:·: .,,··.· II AVtH~ ~Act. ~~~·t-::·~~1 ·(~;~~law~- 71tb' , ·- ' . . . ' - .·:·: ._ '-; ,' .. ·.. · ,·._:· _: -.. ' - ,.- ,' ' ' ·, CongNaa,. lat. Sea!Win). l'loJect placed Sa ~ Etno :NIIlt\ldy ca.tesol'7 1n 19S3. Autboritt .tea' • to )flU), . ' .irt'~·w ' ' ,, . oo:s .;·· ·, '( •·:· ,, . ; .. ' ' ~ '• . I ',_,' I .,j : ·[ iI i I 1 .. I t ' feature·. j I I ·:. ·. , SpUlw;r Cl'Mt, .. 6.06 . I 0---;-"' ,· Sta:nd!U'd. Project. Flood ,3.42· '/( . '"~- . Con3cniv&t.ion Pool. 0.47 .\ ', -~ ,-_,._ . ., ll8i Typer Cnat. el.clvat.ion r Hei&ht. &bow &'treat.lbed j ··. Cnat l.enath ro tt. l. < • I l i I ' .. _.,,, I I I I I j .. ;'': . I ' .. n' ' OU'l'I:B'r WORJ Ca~city; . (Reeervoil' Dee. F1oo4 EJ.. CJ'Jl.Oo 7 501 c.r.•~ . , . .. .. ' Drop Inlet itXS te.t. ;,i' ' '' I Conduit ··}·' I I ··.~ Elevation . i{ Inlet •.. . Outlet. . ',--_" .., . SP:Oit.l'!A;( Uncontrolled lbiitied. broad. c.Nettlt\w.U'·ioWi excavat.eclu Umeetone C:reut Width .. ... '; Crer.t Elevation Ga.t.es 1---1:!i._.£;'~h e~c~·-:.'lrut.):;¢ ~::t-~ -~J.s: ..~t·-•H"'llrQ O:>p;·._-:,J~.t~t (0 i1'" ;39::~0.,:26) ;·: ( ' _.,' ' s.~ .. ;.; __.-; ','·.·"· .;c;,,, . ,··,· .n . "·,:;;~-.~-···- ~-:::;;,.-:.;:'-<• .!- I '·... I I ,.;;;:; '_,:._·.- WJ:tr:;x '_· I ' S!rJ\:a!JU'l'D 1'110JJ:.:::T ll'!.OOD .. -.-.•. ,_ ·'. . · ' ·•. i . ·.· - ·. :•ce.;,u ;;.l') i.tl(:il:'JIII .... Runot.r ,3.45 :tn . '"'7 . <. < . - ·-~ ' .. i i i' ' I ! I ~r' ' i I . i I I ·- I I !' ) (:;:.>I t ' (fj)i I ,c, I : \' / ' I I / . < : I '· I - _-_-f, -- --r~--- : , - f - i - ~- {7/18 LE - -- , : ,i :· , ------' -- -1------b: __ ! -=---· 1 -~ -- ~ - SA&.:.r:- SII•I- u .. -_ r=r_ ~- PROJ£~T D PtTA.:-r c.Re~w<, \-sf\- )vEBN~~xii - _-_-) ---- VNCCdJIR<>I.t..eJ P~IV\ P RA lflll't' 1! "-Te S~AP- GATe.d _: _ .ct..osesi 1111 Rese,..ve•Ft• LDw aoiLeT E Le 1/, L - ... - ~E.Al\.\ l'llf4 :C>~ 1 - ' .. Guf'J.eir - ~-~NO~- ": n _ Tow,tJ A- i!c>Ve C LoSVR.,e ""' Les Niif.ltlle t!NIIl~r . -:siPrW\ '·_ -eLev. £Je .s I " 11.! IH - 81JI L- T - . -- < - 2A 5epfAQ Ot.IVe C~~l< 113o.O I "3"3 ~. 0 1'3'35.0 g.-z J/.3 - • < - •• • ••• ~ ~-~ ' •·•A•••,.,. K.... ~ .. -- .. - - . - -- . - ·-- " ~ .· ' - . . - - ' ~c ~~il~-- f)I(~Hied ~&.. s~. udve. lz Set'f (If~ .1/{ ~~.~ . - . - .. - - "'-I-..' ""'.:!'. - :- --~--- t .. __ I -i · .' ---~----' ------·---- ; ~'------·····-·· ' --- c.: _------,~,,-- f ~:- _UNNiflleJJ ~~~ ~ fi,(.J<,;.~~ 15. (e, t.'l WA,DN "f'IMII~ l'%.83.5' I "2-SS. S I 2.S7• 8 wr 19'z. < i - . !- - ! . . .. - ' ; ' '-• - ·. ~"f/.f: "ull~1'!"il:i;'' HI,KM~Al 9/1 '2'1/laA;SJf~ 5.3 sfftf;eGIUicH 12."·" .-z.r,,,'d \'2.71:,-- ~ :__;Q_ CARMI.~t. ~~ }le~iJ e.~- s ~ ~~~ -t.o- ""Yitlll*PII. .L -l:ii7."o "i2CJs:·o--r-·\~'i ... Cf=- ~~ ' ' ~. "l~. lft~N~.~ ~.b. ~;~:" 11.~ :=!:!': 7.3 - 'lw~~--L,~e.s /333.o -, '3 'i t.o < -. ~ itf/ N.~~c-~R.- rmE~~,;;.J 35.r lfoS~f'(:,,,., g.q I "2.'1'/,S /2.8¥.0 i f--. . - . " .... ·~r-v··,.· \ .. - \'- ' ' ' . ' I ' _J ' 1 9 :.~J~~~-~H~o~LM_r~~-L_A~K<_e~~~~--~~~-.o~_2_.o~o~--~~;_o_·~~-2~·~_2_.s~'~)o__ o-+~7~90 __ ~5_7_zo~-~~-~~b-.0-+3_._i_7o~·_IZ_b_~-~~~~-i~7~~ 1 i . . . j- . / 1780 i5q90 71~7D 13/t,o ZH1ZO 1317.3 13zo.o B P.>r~nck~tf o~K i2?}.7 2.~0 13jso ~~~~.o . • • , J ' Lizgq st,s~o '13~/to 2tt!.:rC.tlAOSJI'I DAMS· NEBR i I =----. . . ,- - '.: Clark Canyon Dam and Reservoir Pr.o,~oct - BC'.:wcrhcad County, 1-!ontana, on the Beaverhead Hivcr; im::ncd:Lc,tely bol01~ tha junction of f(;~ Rock Tiive1• and Horse h•airie Creel< Purpose - Irrigation, flood control, fish and ~r.i.ldlifo, l.r.J.·::.cr suppl;;r and recreation Ac:.thorizod by - Flood Control Act approved 22 Decemi:.nr 191;.1; (Public Ia\·1 5.31., 71lt.h Congreos, 2d Sc:.,.sion) DJ.:~o Co:npl•:<:.o - 19U,, Hater ,;t,orage bogcm 1964 Drain~eo Areas - Dcav::;l·i·aad lliver a.bove Clark Canyon Darn= 2,.320 eq. mi. St.:::·~~.mflow - Aycra.:,o daily flow at Barrott.s, !1ont. = 400 c.f.s. - Avorar:,o anl'1ual flow at Ba.rretts, Hont. = 290,000 A.F. · - Pc:::k flow aij Barretts, J.ront. = 3,720 c.f.s. ( 20 Jm> I:.:lS:.:!:~ F.lev. Gror.s Area Gress Stomee Inc.r0mcntal .±.~2:1 Ft~.I-·ISL /\"res Acrc-.f..9.£.L.. Stnzn. ·-c-A:F" ~ ~nx. :·:.~'.tcr Surf'nco 5571.9- 6,600 328,9'19 rl;op Flcc.~d Control 71,827 U;:.c,.J ..::c (Spillway) G=:·-~~:-;t, Uncontrolled 5560.4 5,90.3 25'1,152 ·~·op of Joint Use 79 ,0')0 E--~ ..)Y.>.:~Ge 5546.1 1;,,9.35 178,062 'l:Jp c:' Activo Con- 50,436 s (_; :··1!.:, -r..ion Storage 5535.7 4,496 12?,626 'i'Jfi (•2 Inactive ,L,.,_.)'• .•,( 11'( s·~-0:: .:1.;3e 5470.6 209 1,509 Top ol" Do ad storaee J. ,1.;.1.:. 3 ;o·~J. ( Ir·-·~. J. ""' of Outlet t.to·-·•,r.-:-) ...... :~.;.> 5455.0 23 61 St.rz~1Lbcd at Dam t}l Axi.3 54/;.6.5 0 0 Dc.rr1 flj-po Earth ..'?.nd rock fill Cr0s"t o1evation "" 5,578.0 ft. TO'? \.~idth = 36 H .. h · ·,!:·t Above Strca•nbed = 133 ft. =: 2 J 950 ;,·-~. -:;"! (,' 1 f. i Lnnd•~rd of left abutment ~;.·ypc Concre·!:.e Chute C:cst Elevation (Top Flood Control Pool) ""5,560.4 .rt. ·,'idth of Crest = 100 ft. ~J_7~~;t.h = 1,39 ft. Discharse Capacity, (l'£x. Po_ol 5571.9) = 9,530 c.f.a. n;~r~t-OutJ.~ Location Loft abutment Dir:xmsion of Outlet Ccr-A!uit.. "" 9 ft. di.a:n. r,~n :~;h of Outlet Conduit = 741 ft. lnl-:;!t Elov~tion = 51,55.0 .rt. Di:>chargc Cap.::i.city, Top Conservation Pool (El. 55)5.7) = 2,200 c.t.s. Dischar<:;e Cap:.city, Top Flood Control Pool (ill. 5560.4) = 2,500 c.r.~. ;jpilllla.y &sin = 45.0 ft. Outlet; Horks Basin = 20.0 t·t-.. Eottcru Elevation B::LJ:·}~·;.j:.:t;.! D~~J:?..;!.9!l.,.DAm r.-~:.::.;ch.:\r;.::-~0 Capacity • (::c:-:. ci.S. El. 5257.0) = 1,,81+0 c.i'.a • SJ..;..;:,J.ce·:.·rny = 600 c.i'.s. · .·,.,,,-;, P.cnch Canal :::: /.~.f+O c.r.. s .. l)_,_-~.n:{on Cn.ntll = 200 c.f.s. Cvcl--fl... ;v:- Heir = 3,600 c .. f.O. r.rop of D::un ·~ 5,260.0 f·G ... L::'. T. \v. Elova.tion = 5so;;52.B ft. • I ~- T:IBER DAM AND RESERVOm General. Location of Project - Liberty County, Montana on the Marias River, 71 miles upstream fran con- . fluence of the Marias River With the Missouri River. Purpose - Irrigation, flood control, fish and 1dl.cllife, and recreation. Authorized by - Flood Control Act approved 22 December 1944 (Public Law 534., 78th Congress, 2d SesL'Iion). Date Completed - 1955, Water storage began in 1955· Drainage Areas Marias River above Tiber Dam 4.,850 sq. mi. Marias River above mouth 9, J.6o sq. mi. Missouri River above Virgelle gage 34,300 sq. mi. Missouri River above Fort Peck Dam 57,725 aq. mi. Stream Flow Average flow at demsite 910 c.f.s. Maximum flow (Brinlqpan gage) flood of 19o8 701 000" c.f.s. Minimum :now (Bril:llrman gage) 14. January 191!9 2.8 c.f.s. ' Reservoir Maxi.mum water surface elevation 3,014.9 ft. m.s.l. Capacity at rnsxinnllll 'W8ter surface elevation 1,3931 000 ac.-ft. Pool area at maximum' 'W8ter surface elevation 22,700 acr~s Flood Control Pool Pool elevation,. top 1 3,012.5 ft. m.s.l. ' Pool elevation, bottom, ultimate 2,992.3 ft. m.s.l. interim \ 2,973.0 ft. m.s.l. Pool area, top , 22, l.8o acres Net storage capacity, ultimate _>400,000 ac.-ft. interim ,690,000 ac.-ft. Irrigation Pool Pool elevation, top, ultimate 2,992.3 ft, m.s.l. ' . interim. 2,973.0 ft. m.s.l. Pool elevation, bottom 2,~67 .o ft. m.s.l. ·· A PERTJ::NEm DA!CA (Continued) Irrigation Pool (Contd) Pool a.rea, ·top, ult:!Jnate 17, 500 acres interim 12,900 acres Net storage capacity for irrigation, ultimate 362,000 ac. -ft. interim -721 000 ac.-:ft. Inactive Storage Pool elevation, top 2,967.0 ft. m.s.l. Pool elevation, bottom river outlet · 2,870.0 :ft, m.s.l. Pool a.rea, top 11, 300 acres Net storage 551,000 ac.-ft. Dead Storage Pool Pool elevation, top 2,870.0 :ft. m.s.l. Elevation, stream bed · 2,825.0 ft. m.s .1. Pool area, top l, )j8Q acres storage capacity 24,000 ac.-ft. Dam Type Rolled earthfill Crest elevation 3,021.0 ·ft. m.s.l. Top Width. 45 ft. Height above stream bed 196 ft. • Length 4,300 ft. Dike Section Location About one mile . from right abutment of dam, not connected to dam. i"J.Pe Eartbfill Crest 3,021.0 ft. m.s.l. Maximum base Width 300 ft. Top Width 25 ft •. Length 17,000 ft. Ma.xim.um height .60 ft. Spillway · Location Right abutment Type Concrete lined open cliannel. B PERTINENT DA'rA (Continued) Spillway ( Contd) Crest elevation 2,98o.o ft. m.s.l. Number o:f' crest gates 3 Type of crest gates Rs.d:!al Width of crest gates · 32ft. Height of crest gates 20 ft. Type gate operating machinery Motor operated individual hoists. Elevation top o:f' gates when closed 3,000.0 ft. Capacity of crest gates at maximum water surface elevation 54,000 c.f'.s. Capacity of crest gates at top of flood control pool 50,000 c..f'.s. River Outlets Location R:!.gb.t abutment Dimension of outlet pipes One 22-inch diameter One 72-inch diameter Length of outlet conduits 1,700 ft. Elevation at which flow begins 2,870 ft. m.s.1. Maximum discharge capacity at top cOnservation pool - 22" pipe - ultimate 60 c.f.s. interim 57 c.f.s • • 72" pipe - ultimate 1,250 c.:f'.s. interim l,lBO c.f'.s. Maximum discharge capacity at top of flood control pool 22" pipe - · 64 c.f.s. 72" p:l,pe - 1,300 c.f.s. Stilling ·Basin for Spill1ro.y Length-crest of s:pill~ray to end sill 1',170 ft. Width at spillway crest 108ft. Width at bottom of st1JJ1ng basin 200 ft. Chute section Rec.ta.ngular Minimum bottom elevation 2, 797 ft. m.s.l. Maximum elevation of riprap below . stilling basin 2,845 f't. m.s.l. Length of riprap below'st1111ng basin lOO ft. Canal Outlet Location Left abutment Length, over-a.ll 6oo" f't. Conduit size .8 f't. X 12 f't. twin box c ------;: PERTINENT DATA (Continued) Canal Outlet ( Contd) · Minimum intake elevation 2,955.3 ft. m.s.l. Size of gates 7 ft. by 12 ft. slide, and ·7 ft. by 12 ft. radie.l Capacity 2,450 c.f'.s. D ...••..• ···.···-· . ·-·· ·····=·-::.c·:....c.·=·--.... •·· ·------~ ...... ,-;:;;:;:-;';:-.---;. .--·~.:::-~ ~---~ •.. i .'i I ~ ,I ' '. ' ''·"'' "',.: i I I 111& Hom Count71 Homan&, Oft the B1.Pm I Mwzo, 22 .,,.. 2iiOJ'th ot the ~ state l1r» ADIS 45 1111•1 ~ ot JluoiUA, , I )bntana, . I .. ~ p!:'Odllct.ioa, lri'1&&Uoa, Sn:iuatr1al. -'-• . tlDod ocotJoal., tilb cd Wldlifet MdS £ .,m.. noJoeat.ion• Floo4 Ccmt.rolfAc\ &PSJIOM 22 J)eowbe1' 1944 (~ Law ~.)4, ?SUi Cqft111 2Dd SillS.) ,·'" \ h:llllbeJ' 1966 : W&W ~ ,__ :J ~ 196S. IS&'»ftli1TeJ'-.. lbJ .. llua ?11® *1• Ill•.. SholhoM as:veJ' abGve aau.1o IUl. - ; ' .. ' Ilia 1,498 *l• 111. . ,, M&bom I1TeJ' ..-. tel.1ANt&Sl. Dua 19,626 *I• ld.. •, ·~ Bi&hom BiWJ' above JIS&boa. Montua 22,88$ lqo ll1o 70,11S lltl• 111. IV' • now (1~) A'911ftP ~ tlow at. •• Xa'd.er, Jfcmt. - ,,su -I - 'i . ' FeU llaw &t. st.. laW, ... - :11,4«) otl . j'' . . . (.JaM 16, 19lS) •• • f Ma:d- IIICllltbl;r tlw at. ... ~. Jloa\. • '· f," 1,06s,ooo A.r. (June 19ln I. ~- ~ tl.w "" X&YJ.ut, XcDt.. • 2,286,000 A.r. (191.7) a.. "":dm• ,.,.,, Dl:ltl at A. Xariu', Maat.. • ,,m,ooo A.r. Cl91.7) · . . · . .: , .. ',I 1. '' ·,.--- •• .: ( j ' "-" !!li-'!§RJOm ' Elevation Grou Area · Gro.. storap IDcl"'IMJ1tal Feet. MSL Aam Acl'!=f'tet. St.emn A·'· ,3660.0 17,9S8 0 1,427,840 S2,81e0 3/Jn.o · 1?,298 1,l'IS1000 0 • (Top ot Sp!l1wa" GatU) . 259,000 ' ' 0 • . ' " . " . A top ot JoiDt. u.. ... ot. '. stone- : .3640.0 12,&ss 1,U6,000 ' ' '\] ·! zso,ooo 3614.0' 7,410• ' . 866,000 · ' (Reot'CI!Iendod )Hn1-o • Oparatin,c r..nl.) 'l'op ~ ~'" stoni-e • 3S41.0 It I 192'. ' ' . ·.- .. • . ·. 48.3,361 • t ~- .' • -- . . ·• • 'fop ot Dud .st.oft&e : 18,967 . . . ' .. (Ri'VV QaUa\ Imvt) 00 0 • '' . ' .. ',...... '~ ' • ,·· f . " • _t__ • • o" ' -:,.'• •' • ' " 0 . • ',I. ' '"'' 9e t..t.~~ r ... ,~,. .. .. 'S> Al'\. . ~~-'---'..·'=· 'L_' .I.•,._. ~""'-:____~------'-'--"-' ., ' ' .I .;-.,. ... . / ' . . \...... )~ ,PJH .· -.· ... Tne I Coaont.. AI'Oia C1'Mt. eln&U. (Top ot da) ;5660.0 t..t. ....1. ..' Ch'ut ld.dth 22t..t. ...... _, ' ' . . - ... . • \ ., f!PT!!JW Wt.~ Gated .iatalce with OGIIOZ'ete.' ''Wd tunN1 • 3593.0 •••.1. ' "'; . :..::··- • ... bbel" ~ oreat aat.ee · ... · 2 '. ' TJpe ot oiut aat.aa ·. · . .,.,,,, . ' . . .. - . ~ . W1c1th ot orea\ aat.ee • He1~ ot oreat. &&tee • • ·TrPI ot aat.e oJ11fttilla III&Oh1 D!t\')' . m"'harp oapaoit.;r (Mu: • " ,, pool.J660.0) 92,000 o.t.a•. · · __..- ... '. -,_·-;· .-.' 1,890 t..t. . 32 teet ~ . . . - ~-- ~ ' _. , .. ., ,:··, . {, ' . Diacllarge oapaoit,r (a\ . . ' . ' c1ee1&n Mad) . . 2.ooo •• ~••• per =.t. Intake elwat.S.ca lk :Jt.so.o ten ••••1. . . . . BvacuaU. - lftoir,at.iGG .. ~ 2 Slt-.1DOb inrido dialaeter . ' too&t.S.ca . ···--.. , Clllllter ot dill to J'1&bt. ot powr peD8t.ooka • : I.qth ot pipe. (ten) . ~ ' . .. . Caatzocal .. •• 2.500 ci.t••• eaob · · . .3400.0 ten ....1. (1rr.t.pt.tGD Oldht.) 3300.0 . .ten a.o.1. (ewaa.t1m ~) ··~- • .·.. . Gftpw!De tur.l (J'utuN ·I ·'~) ··.· ,, 1--9.5-too\ iaaide .u.-ter· ~ : ._ tocat.1oli ... : ·,,. x.tt. a1art-Ri IMactb ot" tuan.l. : ,OS~ CGat.JoQl ~ : · 'Atl'tud sate (~.~·pte. SD M11N) :: ··"'··· IKaoblrp oapaait7 a\ top ot iaaoUW atonp ' • . . elAw •. 3S47 ~ 1162 o.t.o. • lnWI:il! ~ · .. ·, . ·• . ' .. . . . ~ haDda t7po I 87 .~ B.P• : . . 'FOUJ"" 'IR"U.oal ~~bat\ • 62.500 kw. 2!10.000 •• • 2.3 .u... ~ ""- tollowta1l. u.. 3,1~ ...., te6\ . ·., . ·."'-! __ ·~ .· r "-97·S .. •~ E '-l..tw ,_All.,. . ~.' i ' 4 \' .• . -. .. t)~M . ,. )192.0 Necbarp Capaoi_. ~Weir (S<-.3QxJ3.5 ra41al. pt.n) ·~~ u.500 o.t••• -~- S1n1c... (3-lad elide ··pta) '150 ••t •••. • \ • '" . • • • :.,; . • '· .,, •• ,. • .. ., \ .... . :·~ ,. •. ... ~ ...., . • . .. • • '. 1. i. •. " • ,I ... • ' t,JS Lt. Ow T'AI t... • • .. ·.l) Allol\ " • -- ______1___ _ . N ..... __ ------.. : . ,, FLOW PERIODS 0 Water Year (69-70) V Apr-Jul or May-3ul (70) I //){) 1. .,/IJ!)--r- 1 B R OMAHA DISTRICT BOUNDARY)',--"" : I .... PERCENT OF NORMAL RUNOFF (at pertinent locations) OMAHA DISTRICT MAP a S. Aliff IIIGIIIlU Dll111tT, •pMIU. ltAlltM fMUI COlli'S Of , .....lPl • . . ,, .. C) • • • .. o.wur. •t•~t.UU. '. ''; .. ,,-. GRAND RIYER BASIN NORTH DAJroTA ' •/)·r·' -· -{ .. ' IK>WMAlf HAlEY DAM .AJID LAD PAsr 'flAM IIBGULA'l'IOH AOOUS'l' 1969 TIIIIOOOH JULI 1970 ). ·' ~ " 'l'he project lake level on 1 Aucuet 1969 waa 2755.0 tt. a.e.l., the top of• the con.uatioD sons and the 'bue ot the nooc1 control sane. 'Die lake 11'1111 declined to 2753.4 tt. lll.e.L.on 1 March 1970 when intlow tl'Cllll ._lt NYereld the trencl and lenle alia'bed, 'l'he ungated oqtlttt. wrke •taned lliaoJiusina on 29 AprU and . '' ~--.' ,,,. ., '·· ~, oontlmaecl lllltU 2 Jul7. ~eat pool lwel :reaohld waa 2756.4 Oil 1 June. !be •x1•• dai:q 1ntlow waa 850 ate on 9 Hq, 'l'he " • hilbeet da1lT 1'1111&11 wu 310 ole on 10 J1Q' and ap1n on 1 June, llo :Nlealel ...... cluroina the JMI'with the low pted out:Let. '•' · .,·· ~. 31 NJ:r 19'101 tbl lab lnel W dropped to 2754.4 tt. •·•·1• f·'·. • ! ' ."!', .•. I .. ' j'" '," ·~;:-· . . ' BOWMAAI HALEY . ' .-~. ~ . ----·- --- ,., ... ,,fo, ,.70 . ·.. '·.'·.· .._;_ ~- ,, __ _.;·,, ..-... - .. ·---,---- ______' - '·. '' .- MILK RIVER BASIN i' 'I ' .. ' BULL HOOK - SCO'l"l' COUlEE DAMS, MONTAIA AUCUST 1969 THROUGH JULY 1970 10 SIGNIFICANT REGULATION REPORtED SAND CREEK BASIN .. KEU.Y ROAD, COLORADO AOOUSl' i 969 THROUGH JULY 1970 10 SIGNIFICAN'l' REGULATION REPORTED • RAPID CREEK BASIN J I !l f I ~ CEDAR CANYON DAM, BOOrH DAKOTA . AOOUSl' 1969 THROOGH JULY 1969 RO SIGNIPICANT REGULATION REPORTED . ; . -~ ' ' \' . / f l ', 0 CHERRY CREEK COLORADO CHERRY CREEK DAM AND LAKE PAST YEAR!3 REGULATION AUGUST 1969 TIIOOUGH JULY 1970 The lake level on 1 August 1969 was 5550.6 ft. m.a.l. The base of I the flood control zone 1a 5550.0 ft. Inflow during the succeeding 7 months averaged lese than 10 eta. No releases were made and the i, lake level varied little. On 16 March minor sna.melt entered the reservoir and the lake level rose to 5551.1. In an operation to reduce the lake level to the base of the flood control zone, releasee of 125 eta were started on 25 March and ended on 29 March with the lake level at 5550.0. Thie wae the tiret outflow other than teats since 1966. During the tollowiJis 110ntha through JulT, inflow matched evaporation and the lake level on 31 Jul.T,.. 5550.1. No additional releaeee were made. 1 •.•. ) CHERR.~ CREEK JJAM AND LAKE sno + I ' + ..• )• \',I ! • l I FALL RIVER BASIN SOUTH DAKOTA COLDBROOK DAM AND LAKE PAST YEARS REGULATION AUGUST 1969 THROUGH JULY !970 The lake level on 1 August 1969 wae 3580.2 rt. m.e.l. Thie is •' about 5 feet below the top or the conservation pool. The lake • level did not reach the top or the conservation pool (3585.0) during the 7ear and in fact has never reached that level in the ' . 18 711are since closure in 1952. ·Releasee or 0.8 ere to eupplf ., a water right downstream and little inflow resulted in the lake dropping to 3578.8 in early December. Releasee 111!1re reduced to 0.4 era and the lake rose slowly reaching 3580.6 rt. m.a.l, m late Mar 1970. Water right releasee 111!1re increased to 1.0 ere on 4 June and lake levels again dropped and 111!1N at 3579.1 on 31 Jul.T, There wae 110 substantial runott intlAw during the 711ar and 110 tl.ood control 11&11 achieved. (.OJ Col_·C.i , ·a "' M .. ··-·'--· . _ .. '"'-" 1'1"70 . ~. ···------·····--·-· -~------· --~---·--··COL. /JBRoo IL.J)AM. . AND .. L AI< e .... PALL RIVER BASIN ~ Ii SOUTH DAKOTA COTTONWOOD DAM AND LAKE PAST lEAI!h REGULATION AUGUST 1969 THROOOH JULt 1970 Thia dam wu oloeed in the Sprinc ot 1969. Little intlow hae oooUlTIId and no lalce hae toNed. Jlo releuee or regulation haft otovnd, .· ' ·~ \ • I .. J ~-····r-·-·~·~~·-~c-,--~~-----·•·~.,..,._..,.,..,_...... ,..,..,....,...... ,....,_..,...... ,_...... ,.,,...... _~..,....,.,...,_,. . . OLIVE CREEK DAH AND LAJC..: PAST YEAR 1 S P.EGul.i~TIC:I AUGUST 1969 THROUGH JULY 1970 The lake received no flood inflow during ~:'"a past year. No flood control benefits wore obtained. The lake levol -..L~ ~334.8 ft. m.s.l. on 1 Aus..1st; 0.2 ft. below the top of the conservation pool. The lake. fell steadily during tho entire period to a level of 1330.9 ft. m.s.l. on 31 July 1970. There were no releases through the low level cate. "!.i <: i..:. II...... "' I ..."" t ~ 4;"' "'.1 #z BLUE SiEH DAH AND LAKE PAST l"EAR 1 S REGULATION AUGUST 1969 THROUGH JULY 1970 The lake received no flood inflow during the past year. No flood control benefits b~re obtained. The lake level was 1307.1 ft. m.s.l. on 1 Augu::~t; 0.9 ft. below the top of the conservation pool. The lake fell during the entire period to a level of 1303.3 ft. m.s.l. on 31 July 1970. There were no releases through the low level gate. \'lAGON TRAIN DAH AND lAKE PAST YEAP. 1 3 REGULATION AUGUST 1969 TnROUGH JULY 1970 The lake received no nood inflow during the past year. No flood control benefits were obtained. ~ne lake level was 1288.1 ft. m.s.l. on 1 August; 0.4 ft. bo::..e~; the top of the conservation pool. The lcke fell slowly to a level of 1287.3 ft. m.s.l. in January 1970 then rose slightly to a level of 1288.0 ft. m.s.l. in the first part of March 1970. The l.·}:c fell slowly the remainder of the year to a level of 1286.6 ft.~.s.l. on 31 July 1970, There were no releases through the low level gate. I I WA(;Oiv' TRAIN OAM AND L Ak~ PASfi YEAR 1 S ftEGDL.~'l'IO~~ AUGUST 1969 ' ..OUGH JULY 1970 The lake received no flood inflows durinG the past year. No flood control benefits ~IClre obtained. T"ne lake level waa 127' ft. m.s .1. on 1 August; 0.1 ft. above tho top o:Z the conservation ;.col. The lake remained almost steady at the top of the conservation pool with a le•tel of 1270.2 on 31 July 1970. There were no releases through the low level gate, however, there were very brief periods when small amounts of water went through the lowest uncontrolled outlet. STAGf'CCJAcH .DAM AND .I. A/<: li Y.\ !:-,.-::;~ :-iiLL DAH AND lAKE "i:.~---~·~, YZARi S HEGULATION AUGUST 1969 'I'HROUGH JlJLY 1970 The lake received no flood :L."lflows during the past year. No flood control benefit:; wore o::>'cail:ed. Tha lake level YRS. #fo '/ANI)U DAM I.Akt: CONESTOGA DA:·! AND rAKE PAST YEAR 1 S REGUIATIO!J' AUGUST 1969 ?rlROUGH JULY 1970 The lake received no flood inflows during the past year. No flood control benefits were obtained. lhe lake level was 1232.8 ft. m.~.l. on 1 August; 0.2 ft. belm1 the top of t.he conservation pool and the lowest uncontrolled outlet. The la! YRS. C otv'C.sro 6 A /)liM A/II/) I. A kl? ?,JI!! UKES DAH AND UKE PAST YEAR'S ;:c:: The lake received no flood inflows during- the past year. No flood control benefits ~m:re obtai11ed. T'ne lako level was 1338.7 ft. m.s.l. on 1 August; 2.3 ft. below the top of tho conservation pool. The lake fell slowly during tho entire poriod to· a level os 1J36. 7 on 31 July 1970. Thore were no releases through the low level gate. >' R s. t:t- I 3 TWill i.Aki;S {JAM AND L. A/'(~ --·------PAI".'NEE DAN AND LAKE PAST YEAR'S REGULATION .t..UGUST 1969 THROUGH JULY 1970 The lake received no flood inflows during the· past year. No flood control benefits ~;ere obtained. The lake level was 1244.0 ft. m.s.l. on 1 August; 0.5 ft. bela'~ the tofJ of the conservation pool. The lake fell slO\{ly during the c:~ire period to a level of 1242.5 on 31 July 1970. There were no releases through the low level gate. yRS. #14 ANTELOPE CREEK DAM - HOLNES LAKE PAST YEAR'S REGULATION AUGUST 1969 THROUGH JULY 1970 Yne lake received no flood inflow during the past year. No f:ood control benefits were obtained. The lake level was 1241.8 ft.m.s.l. on 1 August; 0.7 ft. below the top of the conservation pool. The lake level fell during the entire period and Was 1237.0 ft.m.s.l. on·31 July 1970. ·There were no releases through the low level gate. BRANCIDJ OAK DAM AND L!.~C 1 1 ? : ·~T iiliu:1 S REGULATION AUGJ.oi' l969 THROUGH JULY 1970 'l'he lake received no flood ini'lo~c C:~ring the past year. No flood control benefits were obtained. Tho l~J(e level was 1277.4 ft. m.s .1. on i August; 6 ft. below the top of the conservation pool. The lake fell slowly until early Octcrber to a level of 1276.7 then rose slowly reaching a hich of 1278.4 on 1 J~~e. Small releases through a low level gate \·;ere made to satisfy a water user do~mstream. The Branched Oak Lake, which started to form in 1967, has never reached the top of the conservation pool. ~ \ &.7 f"" P.M uJ I '170 Bf?{/tJC H ,F.f) PAST lEAR'S REGULATION AOOUST 1969 THROOOH JULY 1970 OOYSEN Fall, winter and spring inflows resulted in the typical armua1 pool dr&wdown. Month]J' mountain snowmelt runor! !orecut made from Febru&r,y through J~ did not require joint uee etor&ge apace tor flood control. Runoff from mountain enolllllelt began in May. The conservation (joint uee) pool did not fill !rom this runoff because (1) precipitation was lese th&n &ver&ge during this eno'IGIIelt runoff period and (2) the initi&l enowpeck was below normal. The peak inflow was 7 ,CXXJ o. r. a. on 25 June. Outflow on thie d&te wu 1,100 o.r .e. The pe~ outrlow during the year wu 1,800 o.r ·•· over & 7 week period in Febru&r,y and M&rch. Flooding 'IIOU1d no. t h&ve occurred downattre- to the Yel.lowta:ll Du project t without Boysen, (no downetn-. flooding ooourncl &nd none wu prevented} • • . . .,.J ~ 1- "'... z ::0 ..0 It- ....> / ...... q; ,, " 'e " .,., 's '' 47 '' '9 II .S ~ 1>1 D J ' M II 1'1 ol. J H'S 11"'1·70 PAST YEAR Is RmULA.TIOH AOOUST 1969 THROUGH JULY 1170 CANYON FERRY At or near power plant capacity releases were made from late sUDDDer through winter to April. Typically this resulted in the late summer drawdown as upstream irrigation reduced inflows during this period. Fall inflows resulted in a pool rise while winter flow resulted in a pool drawdown. Monthly mountain sno~elt forecasts gradually increased, from 79% of average on 1 January to 135% on 1 April and 1 May. Based on these forecasts water spill past the power plant began in April. Although pool drawdown continued, the 1 May forecast indicated the pool to be in the joint use zone needed for flood control. Releasee then were further increased. Mountain snowmelt began during May resulting in a rising pool. In June after the reservoir inflow and downstream tributary !lowe had peaked, releases were further increased to keep the pool below the exclusive flood control zone. Onl:y 4,000 of the 104,000 A.F. total exclusive zone was utilized. The peak inflow was 26,900 c.f.s. on 11 June. Outflow on thie date wae 10,300 c.t.e. The peak outflow was 15,000 c .t. e. trom 13 June to 5 Jul;y. Downatream flooding was prevented. No special operation or releasee were made tor main stem replacement benefit. ' ...... z ::t 0 cz:...... > ...... "'¥ a:_, 'o '' U U H u " H U 49 II& ON D.J I"M 111'1 J,J YR'S I 'I ' ' - 7tO PAST IEAR 1S REGULATION AUGUST 1969 THROUGH JULY 1970 CLARK CANYON The irrigation demand resulted in typical late summer pool dra'Wdown; Typically, fall and winter releases were made to recapture some of the storage. Monthly mountain snowmelt runoff forecast made from January through June did not require joint use storage space for flood control. Therefore, the joint use space was filled from the seasonal runoff as well as 18,000 of the 20,000 A.F. of the replace ment storage space which is permitted for additional conservation usage. Main stem replacement regulation was not utilized. The USBR maintained the pool below space required for flood control through out the year. The peak innow was 1,517 o.t .e. on 14 June. The outflow on this date was 1000 o .t. •., also the peak tor the ;year. Downstream flooding was prevented. •• ...... 1&. z :c:: ...... "'> ...... '3 ,., II& oN DJ Ff'l liM oi,J ,, " 'l YR'S'5 " " " ,, ,~,,., .. PAST YEAR'S REGULATION AUGUsr 1969 THROUGH JULY 1970 GLENDO Normal conservation regulation for this project resulted in the typical pool drawdown in late summer and pool rise or refill in the fall, winter and spring. The seasonal mountain snowpeak that drains into the North Platte River was much above average. Forecast into the river system increased from 139% of normal on 1 Februar;y to 174% on 1 Ma;r. During May the pool reached a peak elevation of 4639.9 on the 26th. With a falling pool, on the 11th and 12th of June a major storm occurred in southeastem Wyaning. Rainfall ranged fran 2 to 5 inches along the area of the North Platte River to as much aa 6-10 inches along some of the tributaries. This resulted in 143,500 o! the 271,900 A.F. total flood control zone being utilized, This -s the highest pool level (ele vation 4645.34) attained since closure in 1956, The pool wae in the fiood zone !or 69 diQ"II. The peak inflow waa 23,600 c.!.s. on 13 June, Olltfiow from Glend.t on thie date wae 500 c .f.a. Peak outnaw !or the ;rear 'IIU 6,600 c.t .a. on 3 August. DoWIUitream flooding -s;]ll'IITented. ,_... w... :z: ..... '>...... _ ....'=)l .J lit ON OJ I'M 111'7 JJ (,0 " u " ''t 's " 0 u " ,.,, , •70 y~·s } ,., 4. ) I~ J.l -~- ~---~·-··--··- HEART RIVER 1l .·NORTH·. DAKOTA il ;:'-"~AST lEAR Is REGUlATION AUGUST 1969 !HROUGH JULI 1970 HEART BUTI'E Releases during late IIUIIIIIler, fall and winter for ooneerYation purposes resulted in a gradual pool level drawdown. Melting of winters accumulated snowfall occurred during April along with much above average precipitation falling both as snow and rain. This resulted in a rising pool and spilling began on 27 April. (Ungated spillway crest at base of exclusive flood control zone), With a spillway release of 700-800 c.!.s. a stonn occurred on the Sth and 9th of May, precipitating .3 to 5 inches of rain in the area above Heart Butte. This resulted in 78,100 of the 147,900 A.F. total exclusive zone being utilized, This was the second highest peak pool since closure in 1949. The pool stayed in this zone until .3 July (tota1 of 68 days of spill). The peak inflow was .30,435 c.f.s. on 8 May, the highest since closure. Outflow at this time was 3,175 c.f.s. The peak outflow was .3, 880 c. f. e. on 12 May. Downstream flooding was prevented. 1 H r CTP' ·=i t--:-f >)T~ +'+r T r ''Hi - ',ilir - H· I{,_ -. ' LLL!J ir Iii:. ri t!: . PAST YEAR'S REGULATION AUGUST 1969 THROUGH JULY 1970 JAMESTOWN During late aUIIIIIer and early tall, releaaea were atill being made to evacuate tlood control storage accumulated during the tlood ot April (1969). When the pool fell below the flood zone in October releases were tenninated, No releaaea have been made aince. Rainfall during April a~ Ma7 oauaed a alight pool riae to a peak ot 1430.35· The pool level did:'encroach on apace required tor tlood control parpoaes. The peak intlow waa about 200 c.t.s. on 15 Mq. The peak Out;tlow waa 350 c.t.a., JUde during the Auguat evacuation ot storage, n.ooding would 110t ban oocurred downatre11111 without .JaMatown (no downatreaa tl.ooding ocC1U'Nd and none wu prnented), .J "'r ... w... 2 2 :J ...0 .>"' w...... IISONOJFMAMJJ 'II " H 'I U '~ '' U " ,, YR'S "''•70 BELLE FOURCHE RIVER WYOMING PAST YEAR'S REGULATION AUGUST 1969 THROUGH JULY 1970 KEYHOLE After releases for irrigation in August (1969), no further release was made until July. As the conservation pool has never filled (dam closure - 1952), all releases from the project were for irriga tion purposes. The peale inflow during the year was 930 c.f.s on 15 May. Outflow at this time was zero. The peale outflow dur1ng the ye&r was 100 o.t ,,, durin& Julf, i'loodinc WOIIl.cl DOt ll&ve occurred downstream without Keyhole (no _downstream tlooding occurred and none vaa prevented). · . / ,£ • ·' j II= . Itt : f=;Hi ·;·'lt ~t i{-j:;:i :::]:h + I (. ~&.'2Z~~~6_6'Q~~ A ~ 0. .li .D JJ. EMil M JJ Jf YEARS !969 1970 XEYHOL£ DAM RAPID CREEK SOUTH DAKOTA PAST YEAR'S REGULATION AUGUST 1969 THROUGH JULY 1970 PACTOLA Releases during late &IIDDIIer, fall, winter and early spring tor conservation purposes resulted in a fair~ steady pool level. Melting ot snowfall, accumulated from the above average precip itation that occurred during Maroh and April, began the last week in April. Th:ls provided tor essential fill of the conservation pool by the tirst of June. During June 1 rainfall caused a slight encroachment into the tlood pool (a total of 6 days trom 12 June to 17 June) • Releases were then increased. ~ about .360 of a total 4.3,050 A.F. ot tlood control space waa utilized,, The peak inflow for the :year was 4.30 c.f .a. on 9 Mq. Outflow at thia time waa 218 c.t.e. The peak outflow waa .311 c.t.e. on 12 Mq. Flooding would not have occurred downetre1111 without Pactola (no dowrwtre11111 tlooding ocQUITBd and none wae prevented), I, ' ' 2 ...0 ..."'> ..._, u ~' '~ n ,., 's " '7 c.a ,, 115 ONOJFI'1111'1JJ YR'S ,,,_7P v GRAND RIVER SOUTH DAKOTA PAST YEAR'S REGULATION AUGUST 1969 THROUGH JULY 1970 SHADEHILL Releases during late summer, fall and winter for conservation purposes resulted in a gradual pool level drawdown. Spring intlowe being below nonnal, releases were reduced during the first week ot April. This release reduction, combined with above normal precipitation for April and Ma:y resulted in a rising pool and spillins began on 21 June. On .3 Jul;y, 1.3 days later, the pool lnel tell below the spillway crest. Only about 500 ot a total 216,000 A.F. of tlood contrOl apace, above the apillwa;r crest, ,.. utilized. The peak inflow-s 1,150 o.t.a. on 9 Hq. Ollttlow at this time 1IU 40 o .t ,a. The peak outflow ,.. 74 o.f .a. on 26 .June. Dcnmatreaa .tloodiDg 1IU pNftnted, ...... i ..,, I . . "' iL 62 .i..l u. 65 6• 67 ~ u A .!. e. tL !!.. L E.. !fl. .A. !!! L. L. . YE"AB5 1969 1970 SHADCHILL DAM PAST YEAR'S REGULATION AUGUST 1969 THROUGH JULY 1970 TIBER Since lindtations wre placed on the apillVQ' 1n 1966, no agreement for flood control p.~rpoaes betwen the Bureau &Ill Corps has been in effect. However, by latter of 28 Ma7 (1970), to the Regional Director, the Corps expressed the advantages and benefits of &nT water withheld from the main stem e;retem b7 Tiber Resel"ffir during this Je&r'a runoff period. From this date 167,000 A.P. was stored in Tiber. During the April-Jul.J' period a maxilnull of 274,000 A.r. wu stored. The IM.'It''""• elevation reached wu'· near the •rl- allRa'ble pl.aDned b7 the Barea• 'QJider preHnt project ooaditiolw. ./ .. · ~ ~-- 1,970 TI8CR L)AM BIGHORN RIVER MONTANA PAST YEAR'S REGULATION AUGUST 1969 THROUGH JULY 1970 YElLOWTAIL Late summer, fall and winter releasee were eet to achieve the low pool level on 1 March to pennit work on the afterba;y tailrace during March and April. Low releases during this period of work resulted in a rapid rise in pool level. Mountain snowmelt runoff forecast were not sufficient to require joint use storage epsce tor flood control until 1 Ma;y. Re leases during Ma;y were increaeed by' the U.S.B.R. to limit the increase in pool rise and meet the flood control requiremente • During the last quarter ot June when anticipsted high flows began, releasee were further increaeed. When the pool entered the exclusive flood control zone releases were regulated to maintain near or below channel capscit;y on the Yellowstone River at Miles Cit;y. Onl;y 61,000 of the 259,000 A.F. total exclusive zone was utilized. The pool was in thie zone tor a total of 12 da;ys. The peak inflow during this time was 16,900 c.t.e. on 29 June. Outflow on this date was 9,900 c.f'.e. The peak outflow wae 14,900 c.t.e on 3 Jul;y. Downstream flooding along the Yellowstone River wu prevented. 2 C) ' . ..." "'> ..."'...... "c... R SON Dol Flf fl t1 J.J U H U H U H ,, " '~ 'S 19£9-70 ' YR'S YELLOWTAIL .DAM-:--· B IGtiORN_L,AKE: Estimated Next Ctnaha District Submission Date Prolect Reservoir Hanual or Report Status (Oct 70) to MRD (OCE) Clark Canyon PIR resubnitted to USBR with OCE comments - 5 October Oct 71 PIR Canyon Ferry PIR revised draft to USBR - Feb 71 Aug 71 PIR Tiber Indefinite status (spillway not useable) Fort Peck Final manual approved by OCE 24 Jan 67, subject to comments. Feb 71 Final Manual I Boysen Final manual approved by OCE - 2 Dec 66 Jan 75 (update) Yellowtail PIR revised draft to MRD - OCE - .31 Aug 70 Rpt. RR I Garrison Prel. manual approved by OCE - 15 May 67 Feb 72 Final Manual ! Heart Butte Final manual approved by OCE - 5 Feb.51 Jan 74 (update) Bowman Haley Prel. manual approved by OCE - 10 Jan 68 Jan 7.3 Final Manual - Shadehill Final manual approved by OCE - 9 Nov 51 Jan 74 {update) Cottonwood Springs Prel. manual approved by OCE - 6 Aug 69 Jan 72 Final Manual Cold Brook Final manual approved by OCE - 10 Aug 54 Jan 75 (update) Pactola PIR approved by MRD - Feb 70 Jul 72 Rpt. RR Cedar Canyon Final manual approved by OCE {draft) - 1.3 Jun 67 Dec 70 Final Manual Keyhole Final manual approved by OCE - 4 Jun 69 Jan 76 (update) Oahe Prel. manual approval delayed by OCE - 17 Jul 67 Aug 74 Final Manual Big Bend Prel. manual approval delayed by OCE - 17 Jul 67 Aug 75 Final Manual Fort Randall Prel. manual approval delayed by OCE - 17 Jun 67 Feb 77 Final Manual Gavins Point Prel. manual approval by OCE - 26 Jan 68 Aug 78 Final Manual Jamestown Final manual approved by OCE - 15 Nov 57 Jan 75 (update) Glendo PIR approved by MRD - Apr'.?O, Revised FCR to USBR with OCE Dec 70 FCR comments - 14 Sep 70 Cherry Creek Final manual approved by OCE subject to comments - 16 Feb 68 May 71 Final Manual_ Kelly Road Final manual approved by OCE (draft) - 1.3 Jun 67 Dec 70 Final Manual Salt Creek Prel. manual approved by OCE subject to comments - 1.3 Jun 67 Dec 71 Final Manual Abbreviations: PIR - Preliminary Information Report (USBR Projects) Rpt. RR - Report on Reservoir Regulation for Flood Control {USBR Projects) FCR - Flood Control Regulations