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Portadam®

Portadam® is a temporary, portable cofferdam, water diversion or fluid retention system for use in open water up to 12 feet deep. Portadam is used for construction, rehabilitation, flood protection and inspection projects in rivers, streams, lakes, reservoirs and other retaining areas. By utilizing a unique free standing steel support system and impervious fabric membrane, the Portadam technique allows many types of in-water construction to be accomplished in a "dry condition" without the need for excavation or fill, costly pile driving equipment, or time consuming sandbag dikes. The Portadam system consists of two main components; a welded tubular steel framework support and a flexible waterproof membrane permitting easy installation in any configuration and over uneven bed contours.

The Portadam® system utilizes the mechanical, resistive and flexible properties of modern synthetic fabrics to provide both temporary and semi-permanent barriers for fluid impoundment and control. The system support members are designed to transfer fluid loading to a near vertical downward load, thereby permitting installation on solid impenetrable foundations while eliminating the need for internal bracing which obstructs the work area. In contrast with driven sheet piling, this structure literally free-stands on the existing bed, eliminating the need for pile driving equipment, crossbracing and anchorage. Hydraulic loading on the membrane assists sealing and stability of the entire structure.

1. •Pipeline River Crossings & Repair
   

2. •Dam Rehabilitation
   

3. •Intake and Outfall Structures & Pipelines
   

4. •Bank Restoration/Stream Channelization
   

5. •Environmental Remediation
   

6. •Bridge Repairs
   

       (Rehabilitation & New Construction)

1. •Boat Ramps
   

       (Rehabilitation & New Construction)

1. •Holding Basins
   

2. •Flood Control & Prevention

800-426-7976
360-699-1426 360-699-1344 info@csigeo.com