SCH Number 2013012029

Project Info

Title

Oak Park Combined Sewer System Regional Storage Facility

Description

The project includes the construction and operation of an underground storage facility that would function as a component of the City's Combined Sewer System (CSS). The facility would provide storage during heavy rainfall periods in order to lower the hydraulic grade line, which would regionally and locally reduce the potential for flooding and combined sewer outflows. Combined sewage from the City's CSS would be piped to the project site and temporarily stored during heavy rainfall periods, then would be metered out once flows have again reduced. The facility would fill and empty via gravity flow; however, two small pumps are anticipated to be required in order to completely empty the facility. Although the proposed project would be part of the City's CSS, because storage would occur during heavy rainfall periods only, the majority of water stored would be storm water (i.e., typically 90 to 95 percent) with a minority of sewage.

2 documents in project