Atlanta, GA Design, installation, and commissioning of 5,300 linear feet of 48-inch water main relocated from the GA 400 right-of-way to the west side of Old Alabama Road, extending from the Chattahoochee River to the intersection of Market Boulevard and Raintree Drive. Ruby-Collins advanced this ENR award winning project from 30% bridging documents to 100% issued-for-construction plans, managing permitting through five distinct entities and coordinating owner-furnished materials throughout design and construction.
Construction features included rock fracturing and removal, tunneling under a 10-foot square storm culvert while maintaining service, relocation of 60-inch storm drain from round culvert in roadway to open channel adjacent to the road, and Chattahoochee River streambank restoration with National Park Service coordination. Public outreach and community communications ensured stakeholder engagement throughout the project.
The new 48-inch pipeline underwent hydrostatic testing, disinfection, and commissioning before being placed into service. A flow-through linestop bypass enabled 48-inch tie-in while maintaining continuous force main service, with abandonment of approximately 5,000 LF of existing 48-inch water line using cellular grout. This complex relocation project successfully removed critical water infrastructure from the highway corridor while maintaining uninterrupted service to customers.
The project faced several unique challenges throughout construction. Prolonged periods of excessive rainfall impacted site conditions and productivity, requiring constant schedule adjustments and water management. Crews also encountered conflicts with unmarked utilities, creating unforeseen coordination and safety challenges in an already constrained corridor.
Additional complications included a failure in the existing forcemain, which required immediate response to maintain service, as well as the presence of contaminated soils that demanded specialized handling and disposal. Together, these factors increased the overall project complexity and extended the schedule.
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