Owasso Heights Drive and Owasso Height Road-G intersect West Owasso Boulevard, so the stormwater collection system on these streets was designed to direct as much water as possible, by gravity, to West Owasso. The remaining runoff from these streets as well as runoff from 2/3 of Owasso Heights Road, which accounts for 60% of the runoff from the project area, was directed to a natural low point on Owasso Heights Road. A 100,000 gallon underground concrete storage tank and lift station was installed at the low point. The lift station pumps storm water from the tank to the collection system on West Owasso. The existing stormwater collection system on West Owasso could only accept water at a certain rate, which dictated the pumping rate of the lift station. The tank was required to provide storage and allow the lift station to pump the water out of the tank over time. The existing storm water drain pipe that used to discharge directly into the lake was rerouted and tied into the lift station for an emergency overflow outlet.
Due to the topography, it was determined the best place to place the concrete tank was under the street, which was difficult due to the limited right of way and the water main and sanitary sewer, which were also located beneath the street. To make everything fit, the concrete tank was placed inline with the storm sewer system with inlets on the north and south ends.