Saco Planning Board hears staff primer on state site-location review, stormwater standards and buffers

SACO, Maine — On Jan. 13 the Saco Planning Board heard staff explain how the states Site Location of Development Act (SLOTA) is applied at the municipal level and what reviewers look for in stormwater and buffer protections.

City staff said SLOTA review is usually triggered when an application will affect roughly "3 acres of what the DEP terms of structure," and that applicants should identify areas that push totals close to that threshold so reviewers can determine if delegated review applies. Staff also said the citys delegated-review capacity is limited and that the Maine Department of Environmental Protection (DEP) takes on reviews when projects approach the municipalitys delegated limit.

"If something does trigger the 3 acres or we believe it may trigger the 3 acres, we will ask the developers or the applicants, project engineer or project manager to clearly identify those areas that are going to trigger that threshold," a staff presenter said. Staff emphasized coordination with the DEP when projects approach the citys delegated-review capacity.

City engineering staff described the technical basis for stormwater review. "We follow the main DEP standards, which in a very simple sense is an inch of rainfall or runoff from the developed portions of the site," the city engineer said, adding that ponds and filter media must be sized to treat pollutants and handle volume according to DEP manuals.

Board members pressed staff on buffer and setback policy, citing frequent agency recommendations. A member noted that Maine Inland Fisheries and Wildlife often recommends a 100-foot buffer while some local standards may be 75 feet; staff said they routinely ask developers to respect the 100-foot recommendation when feasible and that buffers that are critical to stormwater performance are often deed-restricted so they can be enforced.

"Buffers can get deed restricted, and if they're designed as a true buffer they can get deed restricted and monitored," a staff member explained, adding that some no-cut or managed-buffer areas may not rise to the level requiring deed restriction if they are private lots where future uses could be allowable.

Staff described the citys use of third-party peer reviewers for wetlands, wildlife and other specialized analyses, and said peer reviewers typically do site visits and provide independent technical analysis when state data are equivocal. The city also highlighted the DEPs new MELS portal and public permit map as tools for tracking SLOTA submissions and post-approval reporting.

Why it matters: SLOTA thresholds, stormwater controls and buffer enforcement determine whether development proposals can move forward under municipal review, what mitigation or deed restrictions applicants must accept, and how the city will maintain stormwater infrastructure in the long term.

Next steps: Staff said they will continue coordinating with DEP program managers on larger projects and will refine guidance for applicants. The Planning Board discussed possible ordinance changes to incorporate some site-law financial-capacity standards into local site-plan review and indicated it will pursue draft language in future meetings.