DERBY - A section of Route 34 will be closed one weekend this month for work on the Roosevelt Drive wastewater pumping station.

The precast concrete structures that make up the station will be delivered to the site beginning at 8 p.m.on Friday Aug. 16.

“In order to deliver and install the large concrete structures in a safe and expeditious manner, Roosevelt Drive will be closed. Work will proceed continuously over the weekend until the structures are installed,” the Water Pollution Control Authority has announced.

Route 34 will be closed to all traffic between the intersections of Olivia Street and North Avenue, beginning at 8 p.m. Friday, Aug. 16 and ending at 5 a.m. on Monday, Aug. 19.

Traffic traveling east should follow detour signs, turn right onto Route 111 south, turn left onto Route 110 east and left onto Bridge Street.

Traffic traveling west should follow detour signs, turn left onto Bridge Street, turn right onto Route 110 west and turn right onto Route 111 north.

Local traffic will be permitted along Route 34, between the intersections of Olivia Street and North Avenue.

In 2014 referendum, voters approved a $31.2 million sewage treatment improvement project.

According to the WPCA, the Roosevelt Drive pumping station will cost more than $7 million to build.

Holzner Construction, the firm building the facility, cleared the site last year and built permanent sheeting on the river side. This spring it completed the drilling of caissons and began construction of the deep excavation needed for the installation of the pumping station and wetwell.

The project is slated for completion in in the fall.

Derby’s sewage system includes four pump stations owned and operated by the WPCA. Those stations are located at Patty Ann Terrace, South Division Street, Burtville Avenue and Roosevelt Drive. All wastewater flows into the main treatment facility at 1 Caroline St.