- Kansas City Brookside Watershed Improvements Program
Burns & McDonnell has completed a facility plan for the City of Kansas City’s Brookside Watershed (approximately 1,400 acres). The study area included more than 23 miles of gravity sewer in the watershed that conveys storm, sanitary and combined sewer flows. The project was initiated after the October 1998 rain event in Kansas City that resulted in significant flooding in the Brookside Watershed area.
The study included questionnaires and field investigation of the sewer system, including smoke testing, visual inspection and television inspection of existing sewers in selected areas. System modeling of the storm and sanitary sewer systems for the study was performed utilizing XP-SWMM 2000. The results of the investigations and modeling resulted in recommendations for system improvements, including estimated costs and schedules.
The Brookside Watershed Improvements Program, which is the plan that was developed based on results of the study, includes a public investment of more than $30 million to construct improvements to the storm drainage and sanitary sewer systems in the Brookside Watershed to reduce flooding and sewer backups. The program is being incorporated in five phases. The initial phase included local improvements that could be quickly implemented to provide some degree of improvement to the storm sewer system; these included cleaning and replacing catch basins, removing known interconnections and repairing existing pipes. Other phases include design and construction for subsystems within the watershed in residential neighborhoods, including replacing and supplementing existing systems.
Work for all phases includes increasing the capacity of the stormwater conveyance in addition to separation of the storm and sanitary flows. The project includes design and construction of approximately 7.5 miles of new storm sewer ranging in size from 15-inch diameter pipe to 12-foot by 10-foot box culvert. Approximately 4.5 miles of new sanitary sewers will also be designed and constructed, including cured-in-place piping, ranging in size from 12-inch to 24-inch diameter.
The largest phase incorporates improvements to the Brookside interceptor, which conveys stormwater from the watershed to Brush Creek. The existing Brookside interceptor follows Brookside Boulevard from approximately Meyer Boulevard to approximately 51st Terrace, at which point it turns eastward beneath the University of Missouri-Kansas City parking lot. The Brookside interceptor then turns north along Oak Street to the confluence with Brush Creek.
Detailed design has been in accordance with Kansas City American Public Works Association and Kansas City, Mo., Water Services Department’s standards, primarily utilizing the Rational Method and Manning’s formula. Peak stormwater flows for the 10-year design storm for the Brookside interceptor are approximately 3,800 cubic feet per second (cfs) at Brush Creek, 1,835 cfs of which will be discharged via a new outfall at Brush Creek that is downstream of the existing outfall. Design of the new outfall to Brush Creek will include coordination with the U.S. Army Corps of Engineers and the city's Public Works Department.
- Watershed studies/hydrology
- Field investigation
- Smoke testing/TV inspection
- Hydraulic modeling
- Storm drainage design
- Sanitary sewer design
- Pipe rehabilitation
- Extensive utility coordination, including CSO
- Coordination with Corps of Engineers
- Estimate of probable construction costs
- Construction support services
- Extensive public involvement
- Project Web site