Kirwin Dam

The bedrock in the sediments of Kirwin Dam is the Fort Hays limestone of the Niobrara foundation.  The Fort Hays overlies the Carlile shale, which forms the bedrock under valley section of the Dam.  Both of these formations are of Cretaceous Age.  The overburden in the area consists of reworked chalk covered with a thin layer of silt and sand (loess).  Numerous areas of lithologic color change indicating that the chalk is near the surface substantiate the thinness of the silt-sand layer.  Several seismic spreads were shot in such areas to verify this interpretation.  An example of chalk is revealed by a group of light colored patches about 700 feet south of the channel on the right abutment.

RegionFacilities in Great Plains | Great Plains Home Page
Dam Type
WatercourseNF Solomon Rivr
Original Construction1952-1955
Modified Construction
National ID NumberKS00022
Hydrologic Unit Code

Structural Height169.0 ft
Hydraulic Height (Normal Operating Depth at Dam)97.3 ft
Top Parapet (Elevation)
Spillway Crest Elevation1757.3 ft
Crest Elevation1779.0 ft
Crest Length960.0 ft
Crest Width
Base Width
Volume of Dam Construction Materials
Streambed at Dam Axis1662.3 ft
Top of Exclusive Flood Control Pool (Elevation)
Top of Joint Use Pool (Elevation)
Top of Active Conservation Pool (Elevation)1729.3 ft
Top of Inactive Conservation Pool (Elevation)1697.0 ft
Top of Dead Storage Pool (Elevation)1693.00 ft

Hydraulics & Hydrology
Total Water Storage at Elevation
Maximum Water Surface Elevation
Normal Water Surface Elevation1729.25 ft
Spillway Type
Auxiliary SpillwayNo
Spillway Capacity at Elevation96000.0 cfs at 1773.0 ft
Auxiliary Spillway Capacity at Elevation
Uncontrolled Spillway Capacity at Elevation
Outlet Works Capacity at Elevation275.0 cfs at 1701.0 ft
Diversion Capacity at Elevation
Drainage Area1370.0 sq mi
Hydrometeorological Report (HMR)HMR 51 & 52
Probable Maximum Flood (PMF) Report

Contact Information
TitleArea Office Manager
OrganizationNebraska-Kansas Area Office
Address1706 West Third
CityMcCook, NE 69001
Phone (Office)308-345-4400
Phone (Fax)308-345-6470
OrganizationKirwin Irrigation District No 1
AddressPO Box 660
CityGaylord, KS 67638
Phone (Office)785 697-2273

Last updated: Apr 02, 2013