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Lake Sakakawea Hydrographic Survey


The Omaha District of the U.S. Army Corps of Engineers entered into contract with our firm to provide hydrographic surveys of Lake Sakakawea and its tributaries throughout central and western North Dakota.  Lake Sakakawea is the third largest man-made lake in the United States, spanning over 307,000 acres in six counties with over 1,300 miles of shoreline.  The reservoir stretches 178 miles across North Dakota and averages 2 to 3 miles in width, reaching 14 miles at its widest point.

The scope of work encompassed the hydrographic and overbank survey of sedimentation ranges throughout the length of the lake as well as in several of its major tributaries.  The degree of difficulty and effort on this project was greatly impacted by the remote location of many of the sediment range lines.  Access to the transects was challenging and time consuming.  This extensive project was accomplished over a two-year period of time under two different task orders totaling $657,600 in work completed.

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Hydrographic Surveys