|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.
|Region||Facilities in Great Plains | Great Plains Home Page|
|Project||PSMBP - Armel Unit|
|Watercourse||SF Republican R.|
|National ID Number||CO01300|
|Hydrologic Unit Code|
|Structural Height||158.0 ft|
|Hydraulic Height (Normal Operating Depth at Dam)||93.0 ft|
|Top Parapet (Elevation)|
|Spillway Crest Elevation||3710.0 ft|
|Crest Elevation||3742.0 ft|
|Crest Length||9200.0 ft|
|Volume of Dam Construction Materials|
|Streambed at Dam Axis||3617.0 ft|
|Top of Exclusive Flood Control Pool (Elevation)|
|Top of Joint Use Pool (Elevation)|
|Top of Active Conservation Pool (Elevation)||3672.0 ft|
|Top of Inactive Conservation Pool (Elevation)||3638.0 ft|
|Top of Dead Storage Pool (Elevation)||3635.5 ft|
|Total Water Storage at Elevation|
|Maximum Water Surface Elevation|
|Normal Water Surface Elevation||3672.0 ft|
|Spillway Capacity at Elevation||73300 cfs at 3736.2 ft|
|Auxiliary Spillway Capacity at Elevation|
|Uncontrolled Spillway Capacity at Elevation|
|Outlet Works Capacity at Elevation||160.0 cfs at 0.0 ft|
|Diversion Capacity at Elevation|
|Drainage Area||1820.0 sq mi|
|Hydrometeorological Report (HMR)||HMR 51-52|
|Probable Maximum Flood (PMF) Report|