1.) This set of AquaDams was installed in Drift Creek, just South of Lincoln City Oregon for an intake pipe. A 4ft tall by 33ft long double closed end (DCE) AquaDam was installed first in the center of the creek running parallel with the flow. A 3ft tall by 100ft long single closed end (SCE) AquaDam was attached to the 4ft tall DCE AquaDam with a connection collar and run down the center of the creek. An 8ft tall by 50ft long SCE AquaDam was then installed at the upstream end of the 4ft tall DCE dam to divert the flow of the creek away from the work area.

2.) The 8ft tall SCE AquaDam was used at the upstream end because there is a deep hole along that side of the bank and the water upstream will increase in depth from the diversion. A SCE AquaDam requires a bank to keep its starting point (open end) higher in elevation than the body of the AquaDam. The 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.

3.) The diversion channel had a pinch point and so workers needed to widen it, by hand.

4.) The 3ft tall SCE AquaDam was installed along a steep slope that leaned into the work area.

5.) The AquaDam cofferdam system is working great. The water appearance from left to right is stark.

6.) From this angle, the slope leaning into the work area can really be seen. Notice how the AquaDams are leaning to the right?

7.) A plastic sheet was laid on the diversion side of the 4ft tall DCE and a few feet down the 3ft tall SCE AquaDams, due to a boil that occurred under the connection between the two dams. The plastic sheet had one side tied to the middle of the AquaDams a the other on the creek bed, several feet out from the dams.

8.) The water on the left is moving much faster than the water on the right.

9.) The sheet of plastic also helped reduce seepage where the 8ft tall SCE and 4ft tall DCE AquaDams came together.

10.) When diverting flowing water, it is critical to know that flow in equals flow out. Restricting half the width of the creek will change the upstream water depth and the midstream velocity.

11.) Workers installed one more 8ft all AquaDam at the downstream end that is not shown in these photos, to seal off the work area.

12.) Great job AquaDam!