Northfield, Vermont, has completed its five year storm water mitigation project to reduce flooding.
A five year storm water mitigation project to reduce flooding in Northfield, Vermont, has been completed, according to the Barre Montpelier Times Argus.
This project, which began in 2014, is part of the Northfield Village Stormwater Master Plan, which identified storm water treatment along the banks of the Dog River as a priority. The objectives of the project were to reduce riverbank erosion and the amount of sediment and phosphorous entering the river and causing toxic algae blooms, ultimately finding its way to Lake Champlain.
The project was initially limited in scope until the town acquired land across the street from the river on Water Street. Heavy rain and runoff events would cascade water downhill and be diverted into a storm water system that emptied directly into the river, which would cause flooding on Water Street.
An underground infiltration system was put in place to treat the storm water, reported the Barre Montpelier Times Argus.
“It was just an open lot and that open lot is now treating storm water that would have caused more significant erosion along the banks of the Dog River, what we call stream instability (or geomorphic instability) by causing more erosion,” said Pam DeAndrea, senior GIS planner and water quality planner for Central Vermont Regional Planning Commission (CVRPC).
Now that the project is complete, the land will become green space in the town.
Work on the project began in June 2019 and was completed in October 2019. The project cost approximately $500,000 and the town of Northfield contributed $28,000. The CVRPC also applied for a grant from the Ecosystem Restoration Program at the Department of Environmental Conservation to fund the flood mitigation efforts.
DeAndrea contended that the underground infiltration system was the most effective way to capture storm water runoff before it found its way into the river, eroded river banks and caused additional damage downstream in the lake.
“The whole idea about these storm water projects is to sink it where it lands instead of letting it spit into the river,” DeAndrea said.