9th St. Urban Walkway and 4th Ave. Utility Underground

This large infrastructure project was a well-coordinated effort that required months of planning and scheduling with multiple stakeholders including: city agencies, private developers, local utility providers, area businesses and residents.

The extension of the Urban Walkway required a full understanding of how the existing system was operating, installation of a new parallel system, and a phased systematic decommissioning of the existing system.  By creating a phase approach, Phase One would deliver 70% of the Urban Walkway project and allow for an expedited reopening of 4^th Avenue.

Phase Two involved demolition and installation of a 72” RCP crossing 5^th Ave. and coordination with the active creek. In order to successfully install the 72” RCP crossing there were several utilities, most notably a 24” water main, that required a live line stop and a series of gate valves with restraints in order to isolate. Once the 72” RCP was installed the creek then flowed through the new storm system, allowing the remainder of the site, retaining wall and overlook to be completed.

All together the project crossed 5 roadways and reserviced more than 14 businesses and multiple neighborhood blocks with power, fiber-optic, cable, and phone lines with minimal downtime.