Winston-Salem's Janita Lakes Outfall Sewer Rehabilitation
Sewer Evaluation And Design Stops Inflow
The Winston-Salem City County Utility Commission (CCUC) relocated a major force main, leaving the downstream sewer oversized for the residential area it served. The interceptor was also experiencing a large amount of inflow into the older line. The Wooten Company was contracted to evaluate the sewer lines in the Janita Lakes Outfall system to develop a recommendation. The analysis included smoke testing, video review, GPS location and inspection of the manholes, flow monitoring and drainage basin capacity assessment. The existing lines were found to have severe degradation, with much of the RCP pipe having exposed reinforcing. Alternatives were presented to the CCUC for rehabilitation and/or replacement of the lines with smaller lines sized to serve the drainage basin. The Wooten Company then provided design, bidding services, construction administration and construction observation services for the project that included replacement of the existing 24-inch, 27-inch and 30-inch gravity sewer lines with 3,800 LF of 8-inch gravity sewer; 3,600 LF of 12-inch gravity sewer; 640 LF of 30-inch gravity sewer; and rehabilitation of 1,700 LF of 27-inch, 30-inch 36-inch and 60-inch gravity sewer lines. The project was completed in 2014 on schedule and under budget.