1.) A portion of the bank must be de-watered to allow for a set of wastewater treatment sewage plant (WWTP) pipes to be installed. Water turbidity was a concern on this job.
2.) The 10ft tall by 271ft long single closed end (SCE) AquaDam has been bent into a horseshoe/"U" shape configuration and is in place. Now further pumping will need to fill the AquaDam to capacity.
3.) The AquaDam continues to fill, and a good head is forming on the AquaDam above the pond water. Head pressure keeps the AquaDam in place. With no head pressure the AquaDam becomes flaccid and achieves neutral buoyancy. AquaDams are made of light weight flexible materials and will float when empty in deep enough water.
4.) Water levels inside the dammed off work area are dropping.
5.) An excavator is useful when installing or removing a larger AquaDam.
6.) The fill-tubes of the SCE AquaDam are pulled up on the starting bank. Keeping the fill-tubes above the rest of the body of the AquaDam is necessary to keep the water inside the dam. The starting point (open end) and fill-tubes of a SCE AquaDam must be elevated higher than the full height of dam along its given path. An AquaDam will only reach its full height at the lowest elevation along its given path.
7.) The bank where the AquaDam was installed on was very rocky and needed to be cleared prior to installation. Notice the large piles.
8.) Because the area is dammed off and isolated from the main body of water, the excavator operator can operate in the work area without worrying about causing excess turbidity in the pond.
9.) The AquaDam should meet the shoreline at a perpendicular angle.
10.) The excavator operator carefully placed fill up against the AquaDam on the work area side of the starting and ending banks.
11.) After the fill was carefully placed, the operator slowly nudged the fill pile up against the dam.
12.) Once fully filled with water, AquaDams are stable and firm enough to walk on.
13.) A photo of the installed 271ft long SCE AquaDam from the opposite side of the pond.
14.) The pond was not full at the time of this project. As we can see here the edge of the water is far from the toe of the rip rap bank. There was still plenty of water depth over at the AquaDam though.
15.) Workers have begun de-watering the work area with one small pump.
16.) The bank where the AquaDam was placed needed a lot of rip rap removed, but the removal helped the unit seal better.
17.) A zoomed-out photo of the job site from a nearby neighborhood.
18.) The 10ft tall SCE AquaDam is doing a great job at holding back the pond water.
19.) Workers ordered a larger pump to help remove the muddy water from the work area.
20.) The larger pump has done a much better job de-watering. Pumping power is critical for any job that requires de-watering.
21.) An AquaDam may sink into soft mud at the bed of a pond and this mud depth must be considered prior to placing an order.
22.)Workers have had the work area de-watered now for several weeks. Great job AquaDam!
10ft Tall 21ft Wide (full) 271ft Long Single Closed End (SCE) AquaDam, WWTP Pond, Shoreline Isolation, Horseshoe/”U” Shape Configuration, Soft Mud