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Residents press for dredging and river maintenance as consultants flag limited benefits
Summary
Several residents urged restoring historic dredging and gravel harvesting to reduce local flood impacts; consultants said channel dredging and narrow floodplain benching produced modest reductions in modeled water levels and can have trade-offs (increased velocities, erosion risk).
A portion of discussion focused on Volunteer Green and broader channel sediment issues. Several residents argued that historic dredging and gravel harvesting reduced flood impacts and that maintenance could help, while consultants cautioned that dredging can increase velocities and erosion and that modeling did not show large flood-level reductions for modest dredging or localized benching.
"When we put that riprap in there, oh, I couldn't believe the amount of... you fart into the wind, someone else is gonna get it," a resident said, arguing that interventions shift impacts downstream. Stone Environmental reported that lowering Volunteer Green by roughly 8 feet in a modeled scenario produced up to about 1.3 feet of reduction at Bridge Street in the 100-year event, but also a small increase near the wastewater treatment plant, highlighting trade-offs that require careful site-level design and landowner agreement.
