WY01381 - Pilot Butte Dam


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Pilot Butte Dam


	Statistics

General

Region (Map) : .............. Great Plains

State (Map) ................... Wyoming

County ............................ Fremont

Project: ............................ PSMBP-Riverton

Dam type: ....................... Earthfill

Location: ........................ 23 mi NW of Riverton

Watercourse: ................. Offstream

Reservoir: ....................... Pilot Butte

Construction Date:.........1926-1926

National ID Number ...... WY01381

Hydrologic Unit Code ...

Dimensions

Crest Elevation of Dam: ...................... 5467.0 ft

Structural Height of Dam: ...................... 64.0 ft

Crest Length: ............................................ 55.0 ft

Top of Joint Use: .......................................... NA

Top of Active Conservation: ............. 5460.0 ft

Top of Inactive Conservation: ........... 5410.0 ft

Spillway Crest: ...................................... 5460.0 ft

Top of Dead Storage: .......................... 5407.5 ft

Streambed at Dam Axis : ............................. NA

Hydraulics

Normal Water Surface Elev: ............... 5467.0 ft

Hydraulic Height: .................................... 55.0 ft

Service Spillway Type:

Uncontrolled Crest ................................Yes

Morning-Glory ............................................ No

Crest Length ........................................ 100 ft

Gated ....................................................... No

Capacity at Elev: 5461.4 ft,..................500 cfs

Auxiliary Spillway.......................................... No

Capacity at Elev. .................................... NA

Outlet Works Capacity at

Elevation 5460.0 ft., ....................... 1,000 cfs

Hydrology

Drainage Area: ................................. sq mi

Hydrometeorological Report HMR x

Flood Type: ...............................General

Storm Duration: ....................................... hrs

Probable Maximum Flood (PMF) Report:

Peak Inflow: .................................. cfs

Inflow Volume: ........................ acre-ft

Flow Duration: ......................................0 days

PMF Routing MWS Elev.: ................. x.0 ft

Initial Routing Elev: ............................ x.0 ft

Study Date:

Power Generation

Power Generation at Dam Site - None

Bureau of Reclamation Power Program

Narration

Geology

Pilot Butte Dam is located in the Wind River Basin of west central Wyoming. Bedrocks, in ascending order are Pre-cambrian gneiss and metasediments, Paleozoic to Cretaceous sediments, Eocene-age Wind River sandstones, terrace gravel and modern alluvium. The older folded and faulted sedimentary bedrocks are oil-bearing. The nearest known active fault is 35 miles east of the site.

Links

| Recreation |

| Dams Located by State | USBR Wyoming Dams | North Great Plains Region Dams |

| Owner: Bureau of Reclamation, Wyoming Area Office,
PO Box 1630, Mills, WY 82644-1630, (307) 261-5671

| Operator: Midvale Irrigation District,
PO Box 128, Pavillion, WY 82523, (307) 856-6359