Replacing Live Pipelines—Planning for Construction Issues and Sequencing Can Keep Your System Up and Running

• DOI: 10.1061/9780784412480.069
• Publication Date: 2012-11-17T21:24:21Z
• Authors: Dennis A. DeMuth; Erica Jacobs
• Keywords: Constructability; Sanitary sewer

King County and the City of Bellevue (WA) each routinely deal with construction new replacement sewers in their respective systems. The "Bellevue Influent Trunk West CBD Sewer Replacement Project" represents a collaboration two agencies to replace existing trunk lines that serve Bellevue's Central Business District pass through high-density residential neighborhood. pipelines were badly deteriorated reaching capacity, potential for overflows nearby creek. This project was undertaken meet current future capacity needs, improve reliability, minimize environmental impacts during operation. replaces an 24-inch sewer 42" line connecting newly upgraded 13-mgd pump station. are approximately 2,200 feet total length. As part detailed design effort, team carefully considered how contractor might construct prove feasibility, property access restrictions, help estimate schedule constructability issues. paper will focus on consideration issues, sequencing, bypassing sharing concepts saved month time schedule, maintained access, reduced exposure spillage, claims, damage negative community perceptions.