Shadehill Dam

Overview
The Shadehill unit area occupies a more or less central position along the Grande River valley between the eastern and western extremities of the basin.  The valley occupied by the Grande River varies in width from one-half mile to about one and three-fourths miles and is the phsiographic stage of middle maturity.  Oxbow lakes and sloughs meander scars and slip-off slopes are evident.  Alluvial terraces are situated inside of meanders that occupy the valley width.  Meander bends are actively engaged in lateral planation, eroding 50- to 150-foot-high sharp, precipitous valley walls.  Bedrock exposed at Shadehill Damsite along the valley walls of the Grande River is the Upper member of the Hall Creek formation of Upper Cretaceous age.  In places, the higher land of the immediate valley is only a cap of very thin alluvium deposited over bedrock.  Numerous deposits of coarse sand and gravel exist through the terraces.  The bottomland along the river is covered with deposits of alluvium consisting of silt, sand and gravel.

General
RegionFacilities in Great Plains | Great Plains Home Page
StateSouth Dakota
CountyPerkins
ProjectPSMBP-Shadehill
Dam Type
ReservoirShadehill
WatercourseGrand River
Location
Longitude-102.2033
Latitude45.7533
Original Construction1949-1951
Modified Construction
National ID NumberSD01141
Hydrologic Unit Code

Dimensions
Structural Height145.0 ft
Hydraulic Height (Normal Operating Depth at Dam)114.0 ft
Top Parapet (Elevation)
Spillway Crest Elevation2272.00 ft
Crest Elevation2318.00 ft
Crest Length12843.0 ft
Crest Width
Base Width
Volume of Dam Construction Materials
Streambed at Dam Axis2220.00 ft
Top of Exclusive Flood Control Pool (Elevation)
Top of Joint Use Pool (Elevation)
Top of Active Conservation Pool (Elevation)2260.00 ft
Top of Inactive Conservation Pool (Elevation)2253.40 ft
Top of Dead Storage Pool (Elevation)2250.80 ft

Hydraulics & Hydrology
Volume
Total Water Storage at Elevation
Maximum Water Surface Elevation
Normal Water Surface Elevation2312.0 ft
Spillway Type
Auxiliary SpillwayNo
Spillway Capacity at Elevation5700.0 cfs at 2312.0 ft
Auxiliary Spillway Capacity at Elevation
Uncontrolled Spillway Capacity at Elevation
Outlet Works Capacity at Elevation600.0 cfs at 2272.5 ft
Diversion Capacity at Elevation
Drainage Area
Hydrometeorological Report (HMR)
Probable Maximum Flood (PMF) Report

Contact Information
Owner
TitleArea Office Manager
OrganizationDakotas Area Office
AddressPO Box 1017
CityBismarck, ND 58501
Phone (Fax)701 250-4326
Phone (Office)701 250-4242
Operator
TitleArea Office Manager
OrganizationDakotas Area Office
AddressPO Box 1017
CityBismarck, ND 58501
Phone (Fax)701 250-4326
Phone (Office)701 250-4242


Last updated: Apr 08, 2013