Richmond planning commissioners debate three stormwater rule drafts; matrix proposed to set who needs engineered plans

The Richmond Planning Commission on July 15 continued a months‑long effort to write stormwater and erosion rules for the town, debating three draft approaches and how to set clear thresholds for when homeowners must hire professional engineers.

Commissioners and staff compared a Brooks‑authored proposal, an original draft that used major/minor site‑plan triggers, and a simpler "Alternative 2" that would add targeted permitting language to the town's existing zoning and subdivision rules. The meeting focused on where to draw numeric triggers for land‑disturbance or impervious‑surface thresholds, how a risk matrix would be used to decide whether an applicant may self‑prepare a plan, and how to enforce and maintain post‑construction stormwater measures.

Why it matters: The commission is trying to write rules that capture small but locally harmful projects (driveways, large decks, or infill disturbance) without imposing disproportionate costs on homeowners or an unenforceable administrative burden on town staff. Commissioners emphasized fairness for applicants and clear standards for zoning staff to reduce perceived bias in permitting.

Commissioners opened with procedural matters and then turned to three draft approaches. Chair (speaker 1) described Alternative 2 as a modest change that would add erosion prevention and stormwater plan requirements to zoning permit applications and require that stormwater management features be in place before issuing a certificate of occupancy. "The only place that language has been changed is the requirements for any zoning permit," the Chair said, noting the proposal retained a 600 square‑foot impervious‑surface trigger in one draft.

Chelsea Brooks, co‑author of one proposal, said her current draft shortened and simplified earlier text to make administration easier and protect consistency: "There won't be discretion—here's what we've decided are the important factors," she said, arguing a clear matrix would protect both applicants and the zoning administrator.

Commissioner Mark Vowsell and others raised concrete examples—10‑by‑10 sheds, driveways, decks—that showed how a single numerical trigger can produce uneven results depending on lot size, proximity to neighbors and existing impervious coverage. Vowsell suggested tiered floors (small, medium, large disturbances) and that percent‑of‑lot coverage could be a fairer measure in denser village areas.

Guest co‑author Trevor Brooks described a simplified risk matrix that would allow homeowner‑prepared plans for very low‑risk projects, require a plan be shown on permit drawings for mid‑range disturbances, and require a professionally prepared (engineered) plan above a higher threshold. As an example, he noted a proposed 20,000 square‑foot disturbance threshold for engineered plans—roughly half an acre—chosen to capture projects below the state's 1‑acre plan threshold.

Throughout the discussion commissioners distinguished short‑term erosion and sediment controls during construction (E&S measures such as properly‑installed silt fences) from long‑term post‑construction stormwater management (rain gardens, detention, first‑flush devices). The commission repeatedly returned to enforceability: "If it's not in the plan, it's not enforceable," a commissioner said, arguing that even homeowner‑prepared plans must show basic controls on the submitted drawings.

On enforcement and longevity, members discussed ways to ensure maintenance of long‑term measures. One option is filing a simple, form‑based maintenance agreement with town land records so future buyers see obligations and the town has a record to act on during property transfers; commissioners said that approach could allow enforcement at sale time without requiring the zoning office to inspect all systems annually.

Staff capacity and assistance were central concerns. The zoning administrator noted that permitting practicalities favor simplicity; commissioners discussed using town‑funded staff training, a short pamphlet distilled from the Vermont Low Risk Site Handbook, or limited town‑engineer review hours to help applicants and reduce repeated phone support requests.

Next steps: Commissioners directed staff and the drafting team to refine the two matrices (one for construction‑phase E&S triggers and one for post‑construction stormwater management), test the matrix against real permit examples, and return with specific numeric thresholds and a short, one‑page owner guidance sheet. The meeting ended with a motion to adjourn that was seconded and approved.

The commission will review the revised matrices and sample scenarios at a future meeting before drafting final regulatory language to be recommended for public hearing.