Consultant warns dredging is not a cure‑all; advocates targeted sediment management and floodplain reconnection

Roy Schiff of SLR Consulting presented the flood‑resiliency team’s findings and recommended approaches to manage sediment, bridges and flood storage in and around Barre City. “Flood storage, if you look at a river in cross section, flood storage is mostly out on the flood plain,” Schiff said, adding that digging deep in a channel often destabilizes banks and increases erosion and flood velocity.

Schiff explained that where bridges or outfalls are out of design compliance, localized dredging or debris removal can be permitted and effective. He described a Bennington example where reconnecting floodplain acreage and removing historic fill reduced the frequency of bridge clogging and lowered long‑term maintenance costs. Councilors asked whether local man‑made walls and constrained channels change those prescriptions; Schiff said the modeling currently under way will test localized scenarios — removing bridges, adding capacity or reconnecting pocket floodplain storage — to quantify upstream and downstream impacts.

Council members pressed for answers about specific local sites such as the Berlin Street Bridge and Willie Street area; Schiff said his team is building a hydraulic model to test alternatives and report back with quantified tradeoffs so the city can prioritize cost‑effective projects. “When you have to dredge, you’re doing it ongoing,” he said; the consultant emphasized finding opportunities where reconnecting floodplain storage can reduce maintenance cycles and spread sediment deposition across a longer river reach.

The council will receive further modeling results that will compare options, costs and likely effectiveness across flood sizes and locations.