Project Information
A 120-foot ball and socket sheet pile cofferdam was constructed for the U.S. Army Corps of Engineers in a Tennessee drinking water reservoir. The project's location demanded exceptional environmental safeguards - no contaminants could enter the water supply during construction or throughout the structure's operational life.
Factory-applied WADIT® sealant at Petersburg, VA in 2005 ensured consistent quality before shipment. The non-asphaltic formulation was specifically chosen for its inert properties in potable water environments, maintaining seal integrity through seasonal reservoir level fluctuations.
TIME
2005
LOCATION
Tennessee, USA
NUMBERS
120 ft cofferdam
PRODUCTS
Ball & Socket Sheet Pile, WADIT®
Interesting Facts
Factory-installed sealant technology enabled rapid deployment of a watertight barrier in one of Tennessee's critical water infrastructure projects.
The Challenge
Build within an active drinking water supply without introducing contaminants. Seasonal water level changes of up to 30 feet required a flexible yet permanent seal solution.
For Contractors
Pre-sealed interlocks arrived from Petersburg ready to drive. No field application meant no weather delays, no quality variations, and immediate installation upon delivery. Ball and socket connections simplified alignment in the curved cofferdam configuration.
For Engineers
German EPA certification confirmed zero leaching in potable water applications. The 5-bar pressure rating exceeded project requirements by 300%, providing substantial safety margins for this sensitive environment.
For Owners
Two decades of uninterrupted service have validated the initial investment. The structure continues to protect water quality while facilitating routine maintenance operations without supplemental sealing or repairs.
Drinking Water Compliance
Tennessee’s stringent water quality standards required documentation of all materials in contact with the reservoir. WADIT® holds KTW certification for drinking water contact, exceeding U.S. EPA standards, providing regulatory confidence for this critical application.
