CO01300 - Bonny Dam


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Bonny Dam


	Statistics

General

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

State (Map) ...................... Colorado

County .............................. Yuma

Project: ............................. PSMBP - Armel Unit

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

Location: .......................... Near Hale,Colo

Watercourse: ................... SF Republican R.

Reservoir: ......................... Bonny

Construction Date: ..........1948-1951

National ID Number ........ CO01300

Hydrologic Unit Code ....

Dimensions

Crest Elevation of Dam: ......................3742.0 ft

Structural Height of Dam: ................... 158.0 ft

Crest Length: ....................................... 9200.0 ft

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

Top of Active Conservation: ............ 3672.0 ft

Top of Inactive Conservation: .......... 3638.0 ft

Spillway Crest: ..................................... 3710.0 ft

Top of Dead Storage: ......................... 3635.5 ft

Streambed at Dam Axis : .................... 3617.0 ft

Hydraulics

Normal Water Surface Elev:................ 3672.0 ft

Hydraulic Height: ...................................93 ft

Service Spillway Type:

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

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

Crest Length ..................................... 121.5 ft

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

Capacity at Elev: 3736.2 ft, 73,300 cfs

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

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

Outlet Works Capacity at

Elevation NA ft., .......................... 160 cfs

Hydrology

Drainage Area: ...............................1820.0 sq mi

Hydrometeorological Report HMR 51&52

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

Storm Duration: ........................................ 72 hrs

Probable Maximum Flood (PMF) Report:

Peak Inflow: ................................... 613,400 cfs

Inflow Volume: ........................ 897,800 acre-ft

Flow Duration: ...................................... 4 days

PMF Routing MWS Elev.: ...................... N/A

Initial Routing Elev: .......................... 3672.0 ft

Study Date: ........................... November 1983

Power Generation

Power Generation at Dam Site - None

Bureau of Reclamation Power Program

Narration

Geology

Geologic features at Bonny Damsite consist of the following;

1)Valley fill alluvium to depth of 15-20 feet, stream deposited material consisting mainly of silt, sand and gravel.

2)Valley sides of soft Ogallala sandstone encountered beneath the alluvium is a fairly impervious material, lightly cemented and fine sand in grade size.

3)A loess mantle over the high land, which varies from silt to silty fine sand.

4)Fine sand located at the right portion of the dam which overlies sand and silt of the valley fill and is in turn overlain by alluvial sand and silt.

5)Pierre shale bedrock underlies the entire region and is usually found at depths from 55 to 60 feet beneath the valley floor.

6)Talus forming a narrow strip on each side of the valley.

Links

| Recreation |

| Dams Located by State | USBR Colorado Dams | South Great Plains Region Dams |

| Owner: Bureau of Reclamation, Nebraska-Kansas Area Office,
PO Box 1607, Grand Island, NE 68802-1607, (308) 389-4622

| Operator: Bureau of Reclamation, Nebraska-Kansas Area Office,
PO Box 1607, Grand Island, NE 68802-1607, (308) 389-4622

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