1.) An 8ft tall 17ft wide (full) 130ft long single closed end (SCE) AquaDam was used (as the main AquaDam) to dam off this creek, east of Seattle Washington. Four 24-inch diameter pipes channeled the flow of the stream’s water from upstream of the work area to a site 600ft downstream. For this type of diversion, the pipes are referred to as "flume pipes".

2.) Removing large boulders from the path of the AquaDam is essential to creating a good seal. These boulders also represent a problem for the pipes that will need to be installed.

3.) The flume pipes are put into position, the irremovable larger boulders have had sandbags laid around them, and smaller AquaDams have been laid under the pipes.

4.) Each job site is unique. To create a better seal for the AquaDam cofferdam system going over the flume pipes, smaller (3ft high) AquaDams are laid out under the flume pipes and filled after the larger AquaDams were filled.

5.) A 5ft tall by 66ft long AquaDam has been installed first, over the flume pipes. One of the 3ft high AquaDams is directly underneath the 5ft tall dam. The 5ft tall AquaDam was installed to prevent the flume pipes from moving/shifting while the 8ft tall AquaDam is installed. Additionally, this dam acts as a support for the 8ft tall AquaDam.

6.) The water doesn’t want to "jump" over the flume pipes inside the AquaDam, it wants to "push" the flume pipe out of the AquaDams path. The previously shown 5ft tall support AquaDam prevents this action by holding the flume pipes steady as the main AquaDam fills.

7.) As the AquaDam crosses the stream, the flow of the stream is forced through both the flume pipes and around the end of the AquaDam.

8.) The 8ft tall by 130ft long AquaDam fully installed. The entire flow of the stream is now passing through the flume pipe intakes and the upstream water has raised in depth.

9.) A closeup photo of two of the flume pipes in action. The top of these pipes would need to be below the water twice as deep as their diameter to flow at capacity.

10.) Adding some additional length of pipe, upstream, will help mitigate any undermining or scouring that may occur at the intake.

11.) The flume pipes were welded on site into 600ft long sections, providing plenty of work area for working along the stream bank The welded pipe provided flexibility for the contractor to move the pipes if needed.

11.) The flume pipes were welded on site into 600ft long sections, providing plenty of work area for working along the stream bank The welded pipe provided flexibility for the contractor to move the pipes if needed.

13.) Good teamwork, everyone!

14.) Looking upstream at the end of the flume pipes. Material was laid here at the outlet to prevent unwanted erosion.

15.) Notice that the pipes are not flowing at their full capacity, here downstream. This is due to the lack of head in the pool at the intake. These pipes were likely oversized for safety.

16.) Here you can see the 5ft tall by 66ft long support AquaDam (left bottom), the 8ft tall by130ft long main AquaDam (right), and a third 3ft tall AquaDam installed to help capture seepage (top left). There are two other 3ft tall AquaDams placed under both 8ft tall and 5ft tall AquaDams, but they are not visible in this photo.

17.) Another job well done!