Jamestown Dam

Overview
The reservoir area is a gently rolling plain with a surface blanket of glacial till over-lying thin-bedded, highly jointed Pierre Shale. In this plain the James River has cut a valley 1,000 to 4,000 feet wide and 50 to 100 feet, which forms the reservoir. The overburden of the reservoir area consists of three types:

1) Glacial deposits are chiefly till, a heterogeneous mass of buff to light-brown clay, silt, sand, gravel and boulders. Most of these materials are compact and impermeable.

2) Alluvium deposits occupying the valley floor range from highly plastic clays to sands and grovel with some silt. These deposits range in thickness from a few feet near the base of the valley to as much as 120 feet in the inner gorge near the center of the valley.

3) Deposits of slope-wash and slump materials are minor and occur as thin coverings along the valley slopes. These deposits consist chiefly of materials eroded from glacial drifts.

The bedrock is Pierre Shale which is normally hard, dark gray, thinly bedded and highly jointed claystone or siltstone.

General
RegionFacilities in Great Plains | Great Plains Home Page
StateNorth Dakota
CountyStutsman
ProjectPSMBP-Jamestown
Dam Type
ReservoirJamestown
WatercourseJames River
Location
Longitude-98.7100
Latitude46.9333
Original Construction1952-1954
Modified Construction
National ID NumberND00151
Hydrologic Unit Code

Dimensions
Structural Height110.00 ft
Hydraulic Height (Normal Operating Depth at Dam)69.00 ft
Top Parapet (Elevation)
Spillway Crest Elevation
Crest Elevation1471.00 ft
Crest Length1418.0 ft
Crest Width
Base Width
Volume of Dam Construction Materials
Streambed at Dam Axis
Top of Exclusive Flood Control Pool (Elevation)
Top of Joint Use Pool (Elevation)1431.0 ft
Top of Active Conservation Pool (Elevation)1428.0 ft
Top of Inactive Conservation Pool (Elevation)
Top of Dead Storage Pool (Elevation)1400.0 ft

Hydraulics & Hydrology
Volume
Total Water Storage at Elevation
Maximum Water Surface Elevation
Normal Water Surface Elevation1432.7 ft
Spillway Type
Auxiliary SpillwayNo
Spillway Capacity at Elevation2930.0 cfs at 1464.5 ft
Auxiliary Spillway Capacity at Elevation
Uncontrolled Spillway Capacity at Elevation
Outlet Works Capacity at Elevation2990.0 cfs at 1464.4 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 02, 2013