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.
General
Project
PSMBP - Armel Unit
Longitude
-102.1733
Watercourse
SF Republican R.
Reservoir
Bonny
Original Construction
1948-1951
National ID Number
CO01300
Latitude
39.6233
Dimensions
Structural Height
158.0 ft
Crest Length
9200.0 ft
Top of Active Conservation Pool (Elevation)
3672.0 ft
Top of Inactive Conservation Pool (Elevation)
3638.0 ft
Spillway Crest Elevation
3710.0 ft
Streambed at Dam Axis
3617.0 ft
Crest Elevation
3742.0 ft
Hydraulic Height (Normal Operating Depth at Dam)
93.0 ft
Top of Dead Storage Pool (Elevation)
3635.5 ft
Hydraulics & Hydrology
Spillway Capacity at Elevation
73300 cfs at 3736.2 ft
Outlet Works Capacity at Elevation
160.0 cfs at 0.0 ft
Drainage Area
1820.0 sq mi
Hydrometeorological Report (HMR)
HMR 51-52
Normal Water Surface Elevation
3672.0 ft
Auxiliary Spillway
No
Contact
Owner
Title: Area Office Manager Organization: Nebraska-Kansas Area Office Address: 1706 West Third City: McCook, NE 69001 Fax: 308-345-6470 Phone: 308-345-4400
Operator
Title: Area Office Manager Organization: Nebraska-Kansas Area Office Address: 1706 West Third City: McCook, NE 69001 Fax: 308-345-6470 Phone: 308-345-4400
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