What Is a Cofferdam?

 
     
  A cofferdam (also coffer dam) is a temporary enclosure in or around a body of water that is constructed to allow dewatering, diversion or damming of an enclosed area. The primary purpose of a cofferdam is to create a dry environment for a project to proceed. They were first used in 1736.  
     
   
  (A cofferdam creating a water barrier)  
     
  Today's cofferdams are typically conventional embankment dams of both earth- and rock-fill, although concrete or some sheet piling also may be used.  
     
  There is a company headquartered in Michigan - Dam-It Dams, Inc. - whose cofferdams use on-site water to fill dual inner tubes that cause the dam's chambers to slowly and evenly inflate, forming a strong, stable cylindrical tube. As the inner tubes continue to fill and the water pressure builds, the dam unrolls in a controlled manner to create the cofferdam.  
     
   
  (A cofferdam unrolling as it fills with water)  
     
  There are as many water-control applications for cofferdams as there are types of cofferdams. Dam-It Dams' patented, portable, water-filled Cofferdams offer effective and cost-efficient solutions for these major types of situations that are called the 3-Ds of water control:  
     
  Dewatering:  
  Dewatering, unwatering and water control are common terms used to describe the removal or drainage of ground or surface water, typically on a construction site. Dewatering is often required before subsurface excavation for such things as foundations, shoring, cellar space and repairs to existing water structures.  
     
  Diversion:  
  Diversion is the temporary (or sometimes permanent) re-routing of water. It may be required to initiate a project and/or allow a project to proceed.  
     
  Damming:  
  Damming is the process of creating a barrier that holds back water. The barrier may be needed to maintain water table levels, collect water for storage and prevent water from crossing established/safety threshholds.  
     
  Because Dam-It Dams' Cofferdams work with Mother Nature, not against her, they create effective water barriers that leave no - or only a minimal - footprint on the environment. And, their Cofferdams are industrial strength and reusable to minimize additional investment costs.  
     
  For more information about Dam-It Dams' cofferdams and their installation, go to damitdams.com.