Congratulations to the New Hampshire Department of Transportation (NHDOT) for receiving the 2021 ASCE-NH Outstanding Civil Engineering Award for their work on the I-93 Widening Project from Salem to Manchester, completed this spring. The award was presented during the American Society of Civil Engineers NH section (ASCE-NH) Annual Meeting held on July 14th. TFMoran’s Stormwater Monitoring Team is very proud to be a part of this incredible project that entailed widening a 19.8-mile segment of the interstate from Manchester to the Massachusetts state line, as well as upgrades to 5 interchanges and 45 bridges. The goal was to decongest traffic and enhance the safety of motorists.

TFMoran’s responsibility was to provide Stormwater Pollution Prevention Plans (SWPPP), perform stormwater turbidity monitoring and inspection services for the project. Our team of Certified Professionals in Erosion Sediment Control (CPESC), Certified Erosion and Sediment Stormwater Inspectors (CESSWI) and Environmental Scientists worked closely with NHDOT and NHDES project officials. Construction included many drainage and water quality improvements designed to protect NH’s streams, ponds and lakes along this segment; notably, thousands of engineering hours and millions of dollars were spent to minimize impacts to Canobie Lake and Cobbetts Pond from stormwater from the expansion. The project was designed with the intent to collect and treat stormwater runoff using Best Management Practices (BMPs) such as gravel wetlands, extended wet detention, and infiltration basins; safeguards were also implemented to protect said BMPs.

The TFMoran team also worked closely with the highway builders including R.S. Audley, Weaver Brothers Construction, George R. Cairns & Sons, Severino Trucking Co., Alvin J. Coleman & Sons, and E.D. Swett.

For more detailed information go to: https://www.nh.gov/dot/projects/salem10418c/index.htm