Bonny Dam

Overview
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
RegionFacilities in Great Plains | Great Plains Home Page
StateColorado
CountyYuma
ProjectPSMBP - Armel Unit
Dam Type
ReservoirBonny
WatercourseSF Republican R.
Location
Longitude-102.1733
Latitude39.6233
Original Construction1948-1951
Modified Construction
National ID NumberCO01300
Hydrologic Unit Code

Dimensions
Structural Height158.0 ft
Hydraulic Height (Normal Operating Depth at Dam)93.0 ft
Top Parapet (Elevation)
Spillway Crest Elevation3710.0 ft
Crest Elevation3742.0 ft
Crest Length9200.0 ft
Crest Width
Base Width
Volume of Dam Construction Materials
Streambed at Dam Axis3617.0 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

Hydraulics & Hydrology
Volume
Total Water Storage at Elevation
Maximum Water Surface Elevation
Normal Water Surface Elevation3672.0 ft
Spillway Type
Auxiliary SpillwayNo
Spillway Capacity at Elevation73300 cfs at 3736.2 ft
Auxiliary Spillway Capacity at Elevation
Uncontrolled Spillway Capacity at Elevation
Outlet Works Capacity at Elevation160.0 cfs at 0.0 ft
Diversion Capacity at Elevation
Drainage Area1820.0 sq mi
Hydrometeorological Report (HMR)HMR 51-52
Probable Maximum Flood (PMF) Report

Contact Information
Owner
TitleArea Office Manager
OrganizationNebraska-Kansas Area Office
Address1706 West Third
CityMcCook, NE 69001
Phone (Office)308-345-4400
Phone (Fax)308-345-6470
Operator
TitleArea Office Manager
OrganizationNebraska-Kansas Area Office
Address1706 West Third
CityMcCook, NE 69001
Phone (Office)308-345-4400
Phone (Fax)308-345-6470


Last updated: Feb 07, 2014