Wastewater Treatment Improvements for the City of Sulphur

The City of Sulphur (City) existing wastewater treatment plant is located southwest of the City on City-owned property within the Chickasaw National Recreation Area (CNRA). The treatment plant is a 0.85 million gallon per day (MGD) Sequential Batch Reactor (SBR) type facility, with the SBR units constructed in 1989. Original treatment plant construction occurred in the 1960s. Treated effluent transported to the west of the treatment facilities, through approximately four miles of existing effluent force-main, and discharged into Dry Sandy Creek.

The City is currently under the enforceable requirements of an Oklahoma Department of Environmental Quality (ODEQ) Consent Order for wastewater treatment system deficiencies, including inadequate treatment capacity at the wastewater treatment plant. To provide adequate treatment capacity and efficiency, and to meet the requirements of the ODEQ Consent Order, the
City is proposing improvements to its existing wastewater treatment plant, including the construction of a new three-basin SBR system, new flow equalization basin within the existing treatment plant confines, new pre-aeration basin, refitting the existing blower building with new blowers, head works rehabilitation, new aerobic digester, new primary lift station, gravity belt thickener with filter press, and all other related appurtenances. As part ofthe proposed project, approximately three miles of the existing antiquated effluent force-main, constructed in 1963, will be replaced within existing right-of-way, and the existing discharge location moved west to a new location on Dry Sandy Creek, closer to the Washita River. Proposed treatment plant capacity and effluent Waste Load Allocations will be in accordance with the City's pending 208 Water Quality Management Plan revisions.

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Wastewater Treatment Improvements for the City of Sulphur EA and FONSI   (936.6 KB, PDF file) Disclaimer: Links within the above document(s) were valid as of the date published. Note: Some of the files may be in PDF format and can be viewed using the Adobe Acrobat Reader software. You may download a free copy of from Adobe Systems.