The decade long project to replace water siphons serving residents of Staten Island in New York City produced multiple challenges for the construction team.

Despite the need to complete unplanned emergency repairs while working in the Mississippi River during the winter months, the miter gate anchorages project was completed with zero recordable incidents and zero lost-time injuries. 

Biogas once used to power the recovery facility’s combined heat and power system is now generating revenue for the city, thanks to an $8.6-million heat and electrical generation system upgrade.

These 80-year-old structures are critical components of a system that ensures consistent navigability and access along the Mississippi River from Minnesota to the Gulf Coast.

The Riviera Utilities Wastewater Treatment Facility provides additional treatment capacity to accommodate future growth and regulatory demands.

The historic Derby Dam diverts water into the Truckee River that would otherwise flow into Pyramid Lake. However, that diversion led to the near extinction of the endangered native Lahontan cutthroat trout in the lake.

A significant upgrade to the original facility, this new plant serves the water reclamation needs of the city of Mesa and the towns of Gilbert and Queen Creek, Ariz.

The $92-million, eight-year project used cutting-edge wastewater treatment technology and facilities within a constrained footprint, all while maintaining plant operations within strict discharge quality standards throughout construction. 

Back River Wastewater Treatment Plant’s existing headworks to increase influent capacity to 752 million gallons per day from 469 mgd.