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Engineers urge clearer grading, slope and drainage details on proposed site plan
Summary
Reviewers told applicants the plan lacks realistic grading and slope profiles and requested elevations, retaining‑wall profiles and clear limits of disturbance to assess potential impacts to wetlands and the pond.
Engineers at the Mendon Planning Board meeting repeatedly asked applicants to show realistic grading, profiles and limits of disturbance for a proposed site plan and driveway. "If you do have to regrade there, that's gonna add to your area of disturbance," one reviewer said, urging clearer plan notes and profile sections.
The board discussed swales, existing culverts and whether the new driveway would necessitate a culvert; applicants indicated they were not proposing a new culvert at the new driveway and that "drainage would flow open." Reviewers also identified slopes that may exceed 3 percent and asked that the plan include notes where slopes exceed code thresholds and show how new pavement ties into existing grades.
The panel asked for a retaining‑wall profile to confirm top‑of‑wall elevations and requested that applicants indicate the location of existing wetlands and the water protection overlay relative to the work area. No formal approval was granted; the board requested revised drawings showing grades, cross‑sections and clearer limits of disturbance.
