Related Projects Worldwide

Sanitary Sewer at Tulane Research Facility Enlarged to Accommodate Campus Expansion Since its inception in 1964, the Tulane research campus has been expanded several times. During this expansion, the sanitary sewer treatment plant was modified to adjust to new loadings by adding oxidation ponds and a constructed wetlands area. Learn More
Disinfection Key in Keeping Combined Sewer Overflow Discharge Safe for the Mississippi Contact time between the disinfectant chemical and overflow water is achieved in 1,000 feet of shallow 60-inch pipe rather than a deep concrete tank considered during preliminary design. Learn More
Purifying Wastewater for Reuse Stanley Consultants provided construction management services for the Doha North Sewerage Treatment and Pipeline project, a large and complex wastewater sewer treatment and conveyance system in Doha, Qatar. Learn More
Sewer Separation Improves River Quality, Complies with EPA Standards The benefits of the CSS separation project are far reaching and the water quality in the Mississippi River has improved dramatically. Learn More
Westside Diversion Tunnel = Economic Growth for the Quad Cities This unique view of the Davenport Westside Diversion Tunnel project captures the girth of the new sewer line. The project has resolved the sewer problems and indirectly enhanced the City’s economic base. The water environment in the Mississippi River and the habitat for local wildlife, waterfowl, and fish has significantly improved. Learn More
Sewerage Improvements Among Largest Design-Build Wastewater Projects Stanley Consultants provided engineering services to rehabilitate all trunk sanitary sewers and five wastewater pumping stations for the City of Suez, Egypt. Learn More
Improving Baton Rouge's Sewer System with New Wastewater Pump Stations Stanley Consultants designed 16 new replacement pump stations for the City of Baton Rouge to resolve city-wide sewer problems and position the City to realize millions of dollars in fiscal savings through a 25-year planning period. Learn More
Major Wastewater Treatment Plant Expansion Stanley Consultants constructed and analyzed a hydraulic model of the City's wastewater trunk sewer system to use in developing a 30-year sanitary sewer master plan. Learn More

EPA Compliance Accomplished Fort Madison CSO Project

Stanley Consultants was hired by the city of Fort Madison, Iowa to address concerns issued by the U.S. Environmental protection Agency (EPA) about combined sewer overflows (CSOs.)

The EPA issued a Consent Order requiring the City of Fort Madison to address CSOs by either implementing disinfection of CSOs or eliminating them.  There are 13 main combined sewer drainage basins in the City's sewer system.  Stanley Consultants was hired by the City of Fort Madison to conduct field investigations, evaluate both the extent of separation and general condition of sewers, and recommend a separation plan and rehabilitation needs for the Thirteenth Street basin.  The sewer system in the Thirteenth Street basin includes some separated sanitary and storm sewers, some combined sewers, and one CSO structure. 

The methodology used to accomplish the objectives of this study included a combination of field work, data analysis, and mapping.  The field work included manhole inspections and sewer televising.  Mapping work consisted of using the results of the manhole inspections and televising to update the City's existing sewer maps to more accurately reflect the existing sewer system.

Field inspections were conducted on 72 manholes in the Thirteenth Street basin.  Manhole defects and rehabilitation needs were identified.  Based on the results of the manhole inspections and review of the existing mapping, specific sewer segments were identified to be televised.  Sewer televising was conducted on approximately 11,000 feet of sewers.  Each televised sewer segment was assigned a rating to designate the urgency of rehabilitation.  The televising videos and reports were also compared with the existing sewer mapping in order to identify and correct discrepancies.

The results of the field investigations and updated sewer mapping for the Thirteenth Street basin were evaluated to make rehabilitation recommendations and to develop a preliminary plan for sewer separation.  Construction cost estimates were prepared both for recommended rehabilitation to improve sewer system condition and for work required to separate the sewer systems and eliminate the Thirteenth Street CSO.  Recommendations for additional investigative work in the basin were also made.