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Consultants describe rain-garden stormwater plan for 0 Betty Spring Road; commission delays vote pending DEP review
Summary
Goddard Consulting presented a proposal for a single-family house and stormwater measures at 0 Betty Spring Road, including a rain garden and a small underdrain that would temporarily touch the 30-foot no‑disturb buffer. Commissioners raised maintenance and design questions and continued the hearing to March 10 to await DEP/engineer comments.
Goddard Consulting presented an informational review of a proposed single-family home and associated stormwater measures for 0 Betty Spring Road in Gardner, and the commission continued the hearing to March 10 because there is not yet a DEP file number and the city engineer had comments pending.
Andrew Tivo, a wetland scientist with Goddard Consulting, described the lot as about 2.25 acres and said approximately 4,250 square feet of on-site work is proposed, with about 2,685 square feet of that work occurring inside designated buffer zones. The plan places the house and garage outside the 60-foot no-build area; however, portions of the proposed stormwater system and a temporary underdrain for a rain garden would occur inside the 30-foot no-disturb buffer to achieve positive drainage and prevent runoff from discharging onto Betty Spring Road.
Tivo said the design minimizes permanent impacts to the 30-foot zone and that any disturbance there would be temporary, hand-excavated where feasible, and revegetated with a wetland seed mix after installation. Engineer Justin (Justin LeClaire) said the city engineer recommended modified grading to convey any overflow back to an existing catch basin and the inclusion of an underdrain at the rain garden based on site elevations.
Commissioners pressed on alternatives and maintenance. One commissioner asked whether an infiltration basin could replace the rain garden; consultants said local stormwater regulations require performance standards (90% TSS removal and 60% phosphorus reduction) that are more reliably achieved with a rain garden plus pretreatment than with a basic infiltration basin in this design. Commissioners expressed concern that long-term maintenance of an O&M plan is sometimes inconsistent in practice; staff said the city requires recording of O&M obligations with deeds where appropriate.
Because there is no DEP number yet and the city engineer’s comments are still expected, the commission voted to continue the hearing to March 10. The vote was recorded by voice as “All in favor? Aye.”
