Project description

Hanson acquired the Land and Infrastructure Group of Kenneth Balk & Associates in 2000.  As a result, Hanson now has a St. Louis location with wide recognition throughout the Midwest and Central Gulf Coast areas for land and hydrographic surveying capabilities.

The surveying services provided by Hanson through our St. Louis office include: 

• river and harbor navigation surveys

• side-scan sonar surveys

• beach/shoreline/riverbank surveys

• horizontal and vertical control surveys

• DGPS and conventional surveys

• river cross-section surveys

• multi-beam hydrographic surveys

• static or kinematic GPS surveys

• marine structure surveys

• Great Lakes region hydrographic surveys

Our staff is dedicated to maintaining technical leadership and providing quality surveying and mapping information to our clients.

One of our most prominent clients is the Corps of Engineers.  Below are services we have provided to their Chicago and St. Louis districts.

Chicago District

The Chicago District of the USACE awarded Hanson an indefinite delivery contract, which included the following services:

• multi-beam single transducer surveys to ascertain condition of recently constructed underwater reef in Lake Michigan near Burns Harbor
• cross-section surveys of 12 miles of the Grand Calumet River
• marine structure survey of Chicago lock walls to determine deterioration
• side-scan sonar survey of inner and outer breakwaters at Waukegan, Chicago and Michigan City harbors to determine condition

St. Louis district

We received several indefinite delivery contacts to provide surveying services to the St. Louis district of the USACE:

• hydrographic surveys on Mississippi, Illinois, Kaskaskia and Ohio rivers
• scour surveys at Melvin Price Lock and Dam and Kaskaskia Lock and Dam
• surveys to determine unknown underwater obstructions
• levee breach surveys during severe floods of 1993, for which we also received a certificate of appreciation from the St. Louis district
• side-scan sonar survey of concrete stilling basin at lower end of lock and dam #24 on Mississippi River
• primary horizontal control traverses for hydrographic and aerial surveys on Mississippi and Illinois rivers
• baseline sedimentation profile surveys at Swan Lake, Stump Lake, Stag Island and Quivre Island

Click here to see ACASS ratings for these projects