Springfield Rain Garden Project, Springfield, MA
In 2014, Pioneer Valley Planning Commission (PVPC) awarded Regenerative Design Group with a contract to plan and construct a series of urban rain gardens capable of capturing and infiltrating over 18,000 gallons of water per storm event in Springfield, MA. Our team members designed and installed four rain gardens, totaling approximately 10,000 square feet, with the participation of a diverse group of volunteers from around Western Massachusetts.
Rain gardens are a type of “green infrastructure,” a best management practice that are highly effective in addressing pollution and erosion problems associated with urban stormwater runoff. Stormwater flowing over urban surfaces picks up pollutants like hydrocarbons, salt, and heavy metals that then flow directly into waterways. With some sewer infrastructure, large storm events can cause combined sewer overflows (CSOs), a large source of bacterial pollution in urban streams and rivers. Rain gardens capture, filter and infiltrate stormwater into the ground on-site, rather than allowing it to flow into the city’s sewer system. Additionally, allowing stormwater to percolate naturally helps to recharge local aquifers. The process for designing and installing rain gardens involves engineering assessments of the local catch basins for runoff, surfaces, soil percolation rates, and a specific plant palette that is capable of both absorbing high volumes of water and persisting in dry conditions.
At the Renaissance School, RDG prepared plans for a 1,000 s.f. rain garden to pre-treat runoff from a school’s highly visible main entrance roof. The design retrofits an existing lawn and deteriorated beds with a central gravel channel connecting shallow basins flanked by lush, drought tolerant plantings. Planting design focused on diverse urban tolerant species characterized by long season of bloom, particularly during the regular academic year. As part of project contract, RDG staff provided in-class and on-site trainings for high school aged students and their teachers, and helped guide school staff in garden maintenance.
RDG added a fifth rain garden in May 2018, at a Springfield Housing Authority site. This rain garden is unique in that it fulfills the goals of two client collaborations at once: PVPC and the Sustainable Springfield Partnership (SSP). RDG has been part of SSP since 2015, working on urban wetland restoration in the Abbey Brook Conservation Area (ABCA). In a recent round of funding, the SSP stipulated that at least one measure to abate water energy in the neighborhood surrounding Abbey Brook would be implemented. The Springfield Housing Authority site fit the bill and, although small, will hopefully be replicated throughout the housing complex for bigger impact.