Row River Water Treatment Plant

This project was a design-build contract for the City of Cottage Grove. The existing system was located at two sites that were more than twenty miles apart with a capacity of approximately two MGD. Our team converted the existing Row River site to a pall membrane system capable of uninterrupted deliveries of four MGD with future capacity of an additional two MGD. As part of the conversion, new chemical systems and tanks were constructed, two additional settling ponds, and a new eight MGD surface water intake structure components of the work include a 30’ x 30’ Z sheet cofferdam cell into the Row River.

This project also included the dewatering via submersible pumps to a retention basin with a filter dam and then piped 300’ to wetlands. Turbidity was monitored daily by the owner during installation and removal of the cofferdam and was always within permit. Fish rescue was performed numerous times throughout the process and closely coordinated with the ODFW. At the intake structure, fish screens were installed with a new compressed air and air burst system. Six 100 HP vertical turbine pumps were installed in the new concrete surface water intake structure and modifications to the existing facility included adding a membrane filtration system that had complex mechanical piping, valves, and sluice gates.

Total Project Value: $9.5 million

Slayden Construction Role: Design Build General Contractor

Owner: City of Cottage Grove

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Management Skills that Help Reduce Costs

"We have been impressed with their management skills, starting with preconstruction where they performed value engineering that reduced costs, lead procurement with detailed bid packages that brought our project qualified subcontractors and manufacturers and produced a schedule that would get our project completed on time. Slayden has continued this into the construction phase by managing the work to stay on schedule."

Randy Rosane, P.E., Project Manager with Water Environmental Services

Positive and Goal-Driven

"Slayden’s positive approach and eagerness to achieve the project goals was a tremendous benefit and a driving force to the project and its success. Slayden achieved all minority, woman, and emerging small business subcontracting goals and also met the 20% Workforce Training and Hiring Program’s apprenticeship requirements. They also held their subcontractors to these same goals and requirements."

Michelle Lostra, P.E., City of Portland, Water Bureau

Strong Communication and Community Outreach

"I feel confident in recommending Slayden for their approach to neighborhood outreach and desire to work with our community outreach and communications team to help keep neighbors informed, resolve issues and mitigate issues."

Katy Fulton, Lake Oswego – Tigard Water Partnership

Efficient and Safe

"I enjoyed their management style, which was efficient while paying attention to cost. This was done without sacrificing safety. I would welcome the chance to work with them in the future."

Daniel G Shepard, Manager, Grants Pass Irrigation District

Positive Relationship Builders

"Slayden has met all conditions of approval and does a great job of keeping the neighborhood informed. Slayden works diligently to accommodate the neighboring citizens. In several cases, Slayden has gone above and beyond the conditions of approval in an effort to solve citizen’s issues. This has led to the development of relationships between the project team and the neighborhood, which have contributed to the project in a positive manner."

Thomas Lebo, Construction Manager, Brown and Caldwell

Respectful, Courteous, and Safe

"Slayden Construction is true to their word, without a doubt I would hire them for future projects. All of the employees that worked at the plant were respectful, courteous, and preformed the duties at hand in a safe manner. I can’t say enough good things about Slayden, as you can see in this evaluation. Surround yourself with good people and it makes you look good. And it doesn’t get any better than Slayden Construction."

William Schmittle, City of Hermiston