WSP07965

• File Number: 8446
• Description: Cache La Poudre Project
• State: CO
• Basin: South Platte
• Water Division: 1
• Date: 7/1/1983
• Title: Cache La Poudre Project Study and Related Correspondence
• Water Supply Pro - Doc Type: Report/Study

Elkhorn Dam............ t......................... .VII-9
(1) Geology........... r.... ..................... .VlI-l0
(2) Darn............... t......;,................. .VII-l 0
(3) Spillway.......... ~..... .-.................. .VlI-l0
(4) Outlet WOrks...... ~..................... ... .VlI-11
(5) Power Plant....... ~ . . . . .. . .. .. .. .. . . . . . . .. . . VII-l1
(6) Diversion During Construction.............. .vII-ll
Idylwilde Dam................................... .VlI-11
( 1) Geology. . . . . . . . . . . ~ . . . . . . . . . . . . . . . . . . . . . . . . . VI 1-12
(2)
(3)
(4)
(5)
(6)
(7) Diversion During Construction.............. .VII-13
Elkhorn Conduit
(1)
(2)
(3)
(4) Grey Mountain
Elkhorn-New Seaman Cond~it and New Seaman Power
Plant. . .. . . .. .. . .. . . . .. ~. .. . . .. .. . . . . . .. . . . .. .. . . VII-15

( 1) Geology. . . . . . . . . . . ~ . . . . . . . . . . . . . . . . . . . . . . . . . VI 1-1 5
(2) Elkhorn-New Seaman.Conveyance...............VII-16
(3) New Seaman Power Plant......................VII-16
4. Description of Alternative Projects...................VII-16
5. Staged Development OOnsiderations.....................VII-16
6. Cost of Alternative Projects~..........................VII-17
a. Capital COsts..........~.........~...............VII-17
b. Operation, Maintenance and Replacement Costs.....VII-17

CHAPTER VIII EVALUATION OF ALTERNATIVE P*,ECTS (PHASE II)........ .VIII-1
A. INTRODUCTION ..... ............. ~........................ .VlII-l
B. EVALUATION CRI'rERIA........ ............ ................oooo. .VIII-l

c.

(3)
(4)
(5)
Grey
(1)
(2)
(3)
(4)
(5)
(6)
New
(1)
(2)
(3)
(4)
(5)
(6)

d.

e.

f.

g.

h.

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StrL1ctu~a~ G~ology...oo..........oo.............. VII-4
Rock Types.. .0.".............................. .VII-4
Geornorpholog'y..oo.. ~oooo...oo..oo................ .VII-5
l'-Duntain Dam......,......................... .VII-S
Geology............,......................... .VII-6
Dam'..................................... ..... .VII-6
Spillway.................................... .VII-7
,Outlet 'Works................................ .VII-7
Power Plant.......,......................... .VII-7
Diversion During c6nstruction............... .VI_I-7

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Seaman Dam......... ~........ ................. .VII-7
Geology. . .. . .. . . . . ~ . . . . . .oo . . .. .. .. . . . .. . .. . . .VII-8
Dam. .... . .. . . .. .. . ~ . .. . ... . .. .. . . . . . . . . . . .. . . VII-8

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Spillway...........,.......................... .VII-9
Outlet Works................................. .VII-9
Power Plant.......,......................... .VII-9
Diversion During Construction................VII-9

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Dam............... ~.........,.............. .VII-12
Spillway.... ......~....... ...,.............. .VII-13
Saddle Dam........ ~ .. . . . . .. . ~ . . . . . . . . . . .. .. . VII-13
OUtlet WOrks...... ~........................ .VII-13

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Power Plant....... ~......... ~.............. .VII-13

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and Grey Mountain Power Plant....VII-13

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Geology. . . . . . . . . . . ~ . . . . . . . . . . . . . . . . . . . . . . . . . VI 1-14

Rustic-Cache la Poudre Forebay Conveyance...VII-14
Cache la poudre FOtebay and Saddle Dam......VII-14
Power Plant...................VII-15

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iv

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