The job requires the canal on the right to be isolated by way of AquaDam. This is the downstream end of the work area.

This is the upstream side of the work area.

A diversion canal has been dug and lined to allow water to pass around the isolated work area.

A small excavator with a blade attachment is entering the canal. It will be used to push all the muck and debris out of the path of the AquaDam. Sharp debris such as rebar, sharp rocks, or metal scrap can damage the AquaDam and cause a leak. Bulky debris will prevent a good seal from occurring, allowing increased seepage into the work area.

Sharp and bulky debris is present here, all must be removed before the AquaDam is installed.

Debris is visible at the bottom of the canal.

The excavator is starting on the upstream side of the work area, pushing the debris down stream.

The canal is now cleared of debris, and now it's time to install the AquaDams!

This is a 12' high by 59' long AquaDam. It will be the largest AquaDam in the downstream cofferdam.

The 12' high AquaDam was rolled down this bank. Its fill-tubes extend up the bank on the right. Water is being pumped into the fill-tubes to fill and unroll the AquaDam.

Detail on the fill-tubes.

The AquaDam continues to fill from the (4) 3" diameter gas-powered water pumps.

Looking downstream at the 12' high AquaDam installed on the downstream side of the work area.

Meanwhile, on the upstream side of the work area, additional AquaDams have been installed. From the left: 12' high, 8' high, 5' high. These AquaDams are installed side by side for additional support against the water pressure.

The diligent and hard working crew provided by MOCON.

A gap was left between the 8' high and 5' high AquaDams. This gap will collect any water seeping underneath the 12' and 8' high AquaDams to allow easy maintenance dewatering.

Looking downstream at the upstream AquaDam cofferdam. The fill-tubes of the downstream AquaDams can be seen in the distance.

With the work area successfully dammed off with a stairstep pattern of 5', 8', and 12' high AquaDams on both the upstream and downstream sides, the water level in the canal is allowed to raise to normal operating levels, with the new channel diverting the water around the work area.

Looking upstream at the upstream AquaDams.

Some large sandbags were placed behind the 5' high AquaDam for additional support.

This is the work that was to be performed, you can see the diversion channel in the background.

Looking downstream at the downstream AquaDams, several weeks after installation.

Upstream AquaDams

Looking downstream at the upstream AquaDams.