- Dewatering for Bridge Footing Repair
Clear Lake, CA (2004)
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This bridge had a cracked footing in need of repair. Several 3' high
AquaDams® were used to isolate and dewater the work area.
The fill tubes are pulled up through holes in the top of the AquaDam® and tied off.
This is done because of a lack of a good bank to start the AquaDam®. Another
alternative would have been to create a small earthen berm along the shoreline
to start the AquaDam® from.
The AquaDams® are connected to make a continuous run of over 300' in
length running down the middle of the stream. First one side will be
dewatered and excavated, and then the AquaDams® on the ends will be
deflated and moved to the opposite bank to isolate the other side.
A view at the upstream end of the AquaDam®. The stream narrows to about 20'
wide and 8" deep. Notice the two connections: the AquaDam® in the background
can be moved from bank to bank without moving or deflating the other units.
This is because both ends of the middle AquaDam® are closed with a connection
collar. This unit was installed first. The other AquaDams® are dependent upon
this unit to maintain their inner water level.