The District Capital Improvement Program Project No.27-2013-0016 completed Phase 1 of the Discovery Corridor Wastewater System Project, which opened up the City of Ridgefield for future development by addressing the need for additional sewer capacity. Project improvements included expanding the existing system by modifying the existing pump stations to support additional force main sewer lines. This included installing over 64,000 feet of HDPE sewer force mains and gravity pipeline ranging from 3” – 30” in diameter, much of which required positive pressure shoring for tight trenches, de-watering, and thorough pre-planning for traffic impacts caused by working in the median of the I-5 corridor.
Along the alignment, crews installed 44 manholes, 13 air relief vaults, four pump stations, and odor control systems. We also self-performed the construction of a concrete masonry building to house all mechanical/electrical controls. Pipeline construction required a total of five Jack & Bores ranging from 18”-48” in diameter – three of which were underneath Interstate 5, and 700 feet of 16” and 22” parallel directional bores.