WY01389 - Fontenelle Dam


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Fontenelle Dam


	Statistics

General

Vicinity Map

Region (Map) .................. Upper Colorado
State (Map) ...................... Wyoming

County .............................. Lincoln, Sweetwater

Project .............................. Seedskadee
Dam type .......................... Earthfill

Location ............................ 24 mi SE La Barge

Watercourse .................... Green River

Reservoir ......................... Fontenelle

Construction Date .......... 1960-1963

National ID Number ......... WY01389

Hydrologic Unit Code ........

Dimensions

Crest Elevation of Dam: ....................... 6,519 ft
Structural Height of Dam: ..................... 139 ft
Crest Length: ....................................... 5,421 ft
Top of Joint Use: ................................. 6,506 ft
Top of Active Conservation: ............. 6,506 ft
Top of Inactive Conservation: ........ 6,484.9 ft
Spillway Crest: ............................................ x.0 ft
Top of Dead Storage: ......................... 6408 ft
Streambed at Dam Axis : ........................... x.0 ft

Hydraulics

Normal Water Surface Elev: .................. 6506 ft
Hydraulic Height: ..................................... 114 ft
Service Spillway Type:

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

Morning-Glory ........................................... No
Crest Length ...................................... 300 ft
Gated ...................................................... No

Capacity at Elev: 6513.1 ft, 20,000 cfs

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

Capacity at Elev. .................................. 0 cfs

Outlet Works Capacity at

Elevation 6513.1.0 ft., ................. 16,800 cfs

Hydrology

Current Reservoir Storage

Drainage Area: ................................. 4,175 sq mi

Hydrometeorological Report HMR

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

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

Probable Maximum Flood (PMF) Report:

Peak Inflow: .................................. 6,200 cfs

Inflow Volume: ........................ 841,000 acre-ft

Flow Duration: .................................. 20 days

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

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

Study Date: 3/30/1981

Power Generation

Narration

Geology

Conditions at the Fontenelle Damsite were found to be suitable for the dam as planned. The damsite is in a wide-bottomed valley, which slopes up steeply in nearly vertical cliffs on the right or west abutment and slopes up gently on the left or east side. Bedrock is exposed on the entire right abutment from the river level to about elevation 6,530 feet. Rock is exposed on much of the left abutment, especially in the small gullies, which cut the face of the slope. Bedrock at the damsite belongs to the upper part of the Green River formation and is composed of thin-bedded, well-consolidated shale, siltstone, and thin beds of sandstone. The bedrock lies horizontally and is cut by numerous contraction joints and settlement cracks near the surface and in the steep right abutment.

Links

| Recreation |

| Dams Located by State | USBR Wyoming Dams | Upper Colorado Region Dams |

| Owner: Bureau of Reclamation, Provo Area Office,
302 East 1860 South, Provo, UT 84606-7317, (801) 379-1101

| Operator: Bureau of Reclamation, Provo Area Office,
302 East 1860 South, Provo, UT 84606-7317, (801) 379-1101