McKim & Creed provided design, survey, bid/award, construction observation and construction administration services for Phases 1-4 of Charlotte Water’s McAlpine Creek Relief Sewer (MCRS) project. The MCRS, which parallels the original trunk sewer built in the early 1970s, is needed to service the McAlpine Creek basin’s future needs.
The overall MCRS totaled ±80,000 feet of 30-inch through 78-inch trunk sewers. The first three phases involved construction of approximately 14,600 LF of 72-inch to 78-inch trunk sewers, 17,272 LF of 66-inch and 72-inch trunk sewers, and 31,000 LF of 66-inch to 36-inch trunk sewers. These three phases included nine trenchless crossings of NCDOT roadways I-485, U.S. 74 and NC 51.
Phase 4 included construction of approximately 18,000 linear feet of 30-inch to 36-inch relief sewers extending along McAlpine Creek from the end of the Phase 3 project near Independence Blvd. (US 74) to Lawyers Road. As part of the design services, McKim & Creed conducted open-channel flow monitoring and CCTV of the existing trunk sewers to confirm/establish current and future design flows for the basin, evaluate the condition of the existing trunk sewer, and verify line sizes of the new relief sewer. The findings of the flow monitoring and CCTV investigations enabled the project team to identify approximately 2,000 linear feet of the relief sewer that was consequently upsized from 30 inches to 36 inches in diameter to ensure adequate future capacity.
McKim & Creed’s team maintained a collaborative and hands-on approach to construction administration services to quickly address issues, keeping the project on schedule and adding value to the project.