City of Marysville, oh

In 2007, H.R. Gray was retained as the construction manager for the Marysville (Ohio) Upground Reservoir Project. With a total budget of $24,000,000, the project originally consisted of four contracts providing a complete system to capture water from Mill Creek, pump it to the new reservoir, and ultimately deliver the water to the Marysville Water Plant. In order to meet the City's desired completion date, an additional contract was issued for the design and procurement of an inflatable dam and associated controls. The inflatable dam system monitors upstream and downstream water flows/levels and adjusts the amount of water diverted to the reservoir in order to maintain environmentally-friendly flow conditions. In addition to the control center in the pump station that monitors stream flows and levels at the dam, it also monitors water levels in the reservoir via remote self-powered transmitters, maintains historical data, and reports all of the data to the main water plant.



Contracts 1 and 2 provided the piping work necessary to transport water from Mill Creek to the reservoir and the existing water plant. The first contract consisted of the installation and testing of approximately 3,300 linear feet of 6-inch, 16-inch, and 24-inch diameter raw waterlines, as well as modifications and connections to the existing water plant, and installation of a meter chamber. The second contract consisted of the installation and testing of approximately 10,000 lineal feet of 24-inch and 36-inch diameter raw waterline, fire hydrants, and bleed-off valves along Mill Creek, ultimately connecting to the Upland Reservoir Project. The 117-acre reservoir, constructed along Raymond Road will have a storage capacity of 1.3 billion gallons requiring the excavation of 1.7 million cubic yards of on-site soil to construct the 11,000 linear feet of 48-foot embankments.



The final contract encompasses the construction of the dam, intake structure and pump station building in addition to the installation of the inflatable dam purchased under a separate contract with the dam manufacturer. Depending upon the flow rates and water levels in Mill Creek and other environmental conditions, the pump station will be capable of providing water to the reservoir at a rate of up to 40 million gallons per day.

The entire project is scheduled for completion in January 2009.




Please contact H.R. Gray for additional information pertaining to any of our services.