1.) A 10ft tall by 700ft long AquaDam cofferdam system was installed in the cooling channel at the Brunner Island Steam Electric Station in York Haven, Pennsylvania. This installation was necessary in order to construct a series of large cooling towers. At the time of the installation of the AquaDams, the water temperature exiting the electric station was approximately 84 degrees Fahrenheit, while the Susquehanna River, which the station draws water from and discharges to, averages around 50 degrees Fahrenheit.

2.) Workers started this job with an 8ft tall single closed end (SCE) AquaDam to help break up the flow of the channel. To ensure proper installation and functionality of a SCE AquaDam, it is essential to have a starting bank that maintains a higher elevation than the body of the AquaDam. The open end and fill-tubes of the SCE AquaDam must remain elevated above the full height of the dam along its designated path. It is important to note that an AquaDam will only reach its maximum height at the lowest elevation point along its designated path.

3.) When working with flowing water, it is imperative to effectively manage the AquaDam during deployment and filling across the flowing water. Maintaining tension on the roll end while filling the unit allows for head pressure to build inside the AquaDam. It is crucial to maintain a head pressure inside the AquaDam of at least 8-12 inches above the level of the flowing water to ensure the stability of the dam.

4.) The 8f tall SCE AquaDam used to disrupt the flow, was installed four times before workers were able to complete the task. The water depth was greater than anticipated to start with and damming off flowing water causes pooling upstream.

5.) Once the 8ft tall AquaDam was installed, workers moved upstream to begin the installation of the 10ft tall AquaDam cofferdam system. Gravel was placed into the channel for equipment and support for the 10ft tall AquaDams.

6.) Looking downstream, at the installation of the first 10ft tall SCE AquaDam. This dam was launched perpendicular to the flow of the channel (just like the 8ft tall AquaDam). This 10ft tall SCE AquaDam needed to be started high up the bank so that it would have the elevation needed to keep the water inside of it.

7.) Upon reaching the closed end of the first 10ft tall SCE AquaDam, the beam around which it was rolled became stuck. In the process of removing the beam, it broke, resulting in a small, manageable hole. Workers were able to mitigate this issue by pumping for at least 15 minutes each day.

8.) In this photo, workers are installing one of the10ft tall SCE AquaDams that ran parallel with the flow of the channel. The water level against the AquaDam is noticeably high, reaching over 8 feet in depth. The workers have effectively restricted a significant portion of the channel, resulting in the formation of a 3-4 foot tall wave at the downstream end of the cofferdam.

9.) An aerial view from Google Earth Pro image dated 2008. Fantastic job AquaDam!

10.) An aerial view from Google Earth Pro image dated 2025, years later after the cooling towers have been installed.