Chattanooga Wet Weather Combined Sewer Storage Facility

This highly complex project for the City of Chattanooga involved the construction of three, 10 million gallon, pre-stressed concrete storage tanks, one cast-in-place 40 MGD pump station including four 10 MGD submersible pumps, and one cast-inplace diversion structure incorporating an existing 84” gravity sewer, two carbon absorption odor control units, one electrical building including switchgear, VFDs, 600 KW standby generator, automatic transfer switch, restrooms, and HVAC units. The project also included construction of a cast-in-place valve and flow meter vault and two retaining walls. Installation of buried and above ground piping ranging in size from 8” to 54” diameter was also required on the site, including 680 LF of 36” diameter force main pipe, as well as micropiles for construction. Replacement of electrical gear at the existing Influent Relief Pump Station was also required.

84” GRAVITY SEWER LINE 8-54”

ABOVE GROUND PIPING