Why Water Filled Cofferdams Are Superior
Until the early 20th century, cofferdams – temporary enclosures in or around a body of water – were built by filling containers (bags, tubes, etc.) primarily with sand, earth, concrete and/or rock and then positioning the containers to form a barrier. However, these (mostly effective) cofferdams were extremely labor-intensive, cumbersome and non-reusable. Water filled cofferdams offer an updated approach, with increased effectiveness, and lower cost.
(The start of a cofferdam in the mid-20s)
Dam-It Dams, Inc. and other modern water filled cofferdam manufacturers now use on-site water to fill dual inner tubes that cause the water filled 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 fully inflated cofferdam filled with on-site water)
There are many advantages to using water filled cofferdams:
- Fill material (i.e., water) is readily available on site in unlimited quantities
- Water filled cofferdams are easily and quickly filled
- They can be molded to perfectly fit a lake bed, river bed, watershed or any other type of physical setting
- Water filled dams make for an excellent seal and help ensure minimal on-site water escape
- Water filled cofferdams are reusable to minimize additional investment costs
- Dam-It Dams’ cofferdams and others like them work with Mother Nature, not against her, to create effective water barriers that leave no – or only a minimal – footprint on the environment.
For those reasons and many more, water filled cofferdams are far superior to their predecessors.
For more information about Dam-It Dams’ cofferdams, applications and installation, go to damitdams.com.