Ohio River Harbor Dredge Survey	Harlan County Lake Survey	Red River of the North	Standing Bear Bridge	Vermillion-Newcastle Bridge	Weatherby Lake	U.S. Army Corps of Engineers

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Hydrographic Surveys for the U.S. Army Corps of Engineers

Missouri River and tributaries from Hermann, Missouri to Fort Peck, Montana

Since the late 1980’s, the U.S. Army Corps of Engineers have relied on the expertise of Eisenbraun and Associates to perform hydrographic surveys along the Missouri River, from as far south as Hermann, Missouri, to as far north as Fort Peck, Montana. The tasks Eisenbraun and Associates has completed for these jobs include:

• Continuous water surface profiles of the Missouri River which involved spanning 313 river miles, at six different times during a two year period, from Gavins Point Dam in Northeast Nebraska to the Kansas border. Water surface elevations were obtained from pre-existing monumentation along the river during a two-day time frame using two crews working simultaneously.
• Full hydrographic and overbank survey of a 7,000-foot reach of the Missouri River near Buford, North Dakota. Sixty cross-sections were surveyed on this reach and data collected every 25 feet with overbank surveys extending 50 feet landward on high bank. Final delivery was an ASCII file with rangeline data sets in North Dakota State Plane Coordinates, North Zone, NAD-27 and MSL elevations.
• A total of 126 hydrographic and overbank cross-sections on 18 Missouri River tributaries were surveyed between Sioux City, Iowa and Rulo, Nebraska. The data were provided in state plane coordinates and final data were reviewed and submitted in the requested ASCII format.
• An extensive six-month hydrographic survey of all sedimentation ranges in a 73 mile reach of the Missouri River and Lewis and Clark Lake between Fort Randall Dam and Gavins Point Dam. The survey included hydrographic surveys of 15 sedimentation ranges on a 13 mile reach of the Niobrara River as well. Critical data were provided on an on-going basis to the rivers and Reservoirs Section of the Omaha District for their river modeling in order to provide the public with timely information about river changes due to record level flows.
• Overbank and hydrographic surveys and flow measurements at 24 locations on the Missouri River from Buford, North Dakota to Fort Peck Dam in Montana. Final delivery included ASCII data sets in state plane coordinates (NAD 27) and NGVD 29 elevations. An Excel file of the velocity measurements was also provided.

The Outcome

In total, Eisenbraun and Associates has completed over 170 delivery orders for the Omaha District of the U.S. Army Corps of Engineers. E/A’s commitment to quality in service certainly can be seen from this track record.