Mississippi River Lock & Dam Site Surveys

Historic Mead Building Survey

Red Rock Dam Renovation Project

Sacred Heart Church Survey

Ag Holding Pond As-built Survey

Lower Boulder Creek Bridge Survey

Waste Stockpile Volume Survey

U.S. Army Corps of Engineers, Rock Island District

The Rock Island District engaged Eisenbraun and Associates under Contract No.W912EK-10-D-0001 to perform  the surveying and mapping of the navigation lock sites situated along the Mississippi River from Dubuque, Iowa to Saverton, Missouri.  The project involved topographic surveys and high definition laser scanning of twelve lock and dam sites.

The project Scope of Work called for new control to be established at each lock site using the NAVD 88 vertical datum.  All existing control on the locks currently uses the MSL 1912 vertical datum.  One permanent Type G frost-free monument was constructed at each site.  Following adequate GPS observation sessions, the resulting OPUS solutions were submitted and published in the NGS OPUS Database.  Verification survey checks were made on other NGS control points in the region and ties were made to several existing control monuments at each lock site.

A utility locate subcontractor was used to mark utilities on each site.  A topographic survey crew followed closely behind the control crew and utility locater.  Conventional topographic survey procedures using GPS RTK and robotic total station survey methodologies were initially used to conduct the topographic site surveys.  The District also requested that each site be fully scanned using terrestrial LiDAR.  Eisenbraun survey crews utilized our Leica ScanStaion2 3D laser scanner from multiple scan locations at each site to capture approximately 900 million survey points.  Data were collected to obtain locations and ground elevations of all building structures, utility locations, and physical features such as roadways, concrete structures, signs, and parking areas. The final product delivered included the development of one-foot contour maps in both the 1912 and 1988 datums.  Woolpert personnel assisted on this project in the development of the mapping products.

 The resulting point clouds were registered into one unified point cloud per site for delivery to the designers at the Corps of Engineers.  We also provided high resolution full-dome panoramic digital photos from each scan location for use by District personnel.  Tru-View files were also developed and provided for each site allowing end users to interact with the survey data and digital images without the need for expensive software applications.  Eisenbraun crews very effectively utilized HDS techniques on this extensive survey project.