Workers have installed a 4ft tall 9ft wide (full) 20ft long double closed end (DCE) AquaDam in the middle of the channel to break up the current and to use as a platform for starting the first 8ft tall AquaDam, which is a 50ft long DCE unit.

The first 8ft tall AquaDam has been started, just downstream of the 4ft tall starter platform DCE unit. Notice that the fill-tubes are on top of both DCE AquaDams. Workers hold the rolled-up remaining length of the 8ft DCE to allow the rest of the AquaDam to build head above the surrounding water, as it fills.

The first 8ft tall AquaDam was filled enough to be able to start the second dam, which was an 8ft tall 1506ft long single closed end (SCE) AquaDam. The SCE unit used the downstream closed end of the DCE dam as it’s starting bank. Notice that the SCE AquaDam has its fill-tubes through the connection collar and on top of the DCE dam.

Workers hold the rolled-up end of the 8ft tall SCE AquaDam until the body of the unit has built about 6-inches of head above the surrounding water, release a couple feet from the role, and then repeat the process until the entire length is unrolled.

The next 8ft tall SCE AquaDam has been started, off the closed end of the second 8ft tall and is filling.

Looking at the fill-tubes of the third 8ft tall AquaDam after they have been pulled up through the connection collar. The closed end of the second 8ft tall dam has become the starting bank for the third AquaDam.

Workers are installing a 5ft tall 11ft wide (full) 50ft long SCE AquaDam, about 20ft downstream of the 4ft tall dam and off the side of the first 8ft tall dam. This unit was installed to help displace the current of the river towards the other side.

Now that the current has been diverted and the fourth 8ft tall by 100ft long AquaDam has been installed, workers are back at the downstream end to make the final connection with the collar of the fourth 8ft tall dam to close off the first work area.

Workers have positioned and are now filling the fifth 8ft tall AquaDam. This unit needed to make a turn towards the bank to close off the work area, at the downstream end.

The fifth 8ft tall AquaDam has been installed and is almost full. Notice that the water on the right side of the photo is moving quickly compared to the left side.

The sixth 8ft tall AquaDam has been installed just upstream of the 5ft tall AquaDam installed earlier. Fill material was placed where the two SCE AquaDams launched from, off the side of the 8ft tall DCE AquaDam. The fill was used to help eliminate seepage that was piping through.

The AquaDam cofferdam system is up and working great. Now it is time to start de-watering.

Work area de-watering, great job AquaDam.