This gravel wetland was built to treat stormwater from 48-acres of roads, parking lots, and store roofs to remove water pollutants like nutrients and metals before flowing to Long Creek. The gravel wetland also helps increase dissolved oxygen while cooling and slowly releasing water into the Creek to better support stream life.

Approximately 800 feet of Blanchette Brook was restored at Colonel Westbrook Park. Boulders and tree root wads were used to restore the stream channel and create habitat. Plants were also added along the stream banks to shade the stream.

The Colonel Westbrook Stormwater BMP project includes portions of Spring Street, County Road, and properties in the Colonel Westbrook Park, in Westbrook. The project area treated 33 acres. An existing stormwater pond was retrofitted to a gravel wetland. Additionally, five underdrained soil filters, one Brentwood StormTank system, and two StormTech chamber systems were also installed. These systems remove pollutants and improve flow into the Brook after storms.

The Darling Avenue project treats runoff from 7.21 impervious acres. Stormwater is managed by Filterra units, soil media filters and landscaped medians. Installation includes attractive landscaping for improved pedestrian street views.

The District worked with Fairchild Semiconductor and Texas Instruments to install an integrated stormwater retrofit. This project treats 18.5 acres of impervious surface, upgrading an existing detention pond with a gravel wetland, converting two existing smaller detention basins into one treatment system, and removing nearly one acre of impervious parking.

The original detention pond from the 1980s was retrofitted with a settling basin with a valve to control streamflow and a gravel underdrained soil filter to remove pollutants.

The existing paved and concrete medians along Gorham Road were retrofitted to vegetated medians. The medians treat approximately one acre of impervious area and resulted in the removal of one acre of impervious cover.

An existing detention basin adjacent to the Maine Mall parking lot was retrofitted into a gravel wetland. This wetland removes pollutants using plants and bacteria to treat stormwater.

The MaineDOT installed and maintains a portion of porous pavement on Maine Mall Road. Porous pavement allows rain and melted snow to pass through the surface of the road to the filtering system below.

Stormwater treatment systems were installed along Maine Mall Road treating 8.4 acres of impervious area. Filterra units and other treatment BMPs were installed along the road. In addition, a detention basin at the Comfort Inn was retrofitted into a bio-retention/filter basin.

This project was one of the first structural retrofits completed in the watershed. The project includes a multi-cell soil media filter that collects stormwater and distributes it into seven treatment cells, underground StormTech chambers to hold runoff, and StormTreat systems installed to treat the stormwater.

This project modified the existing drainage system to store runoff and remove pollutants. Two thousand feet of streamside vegetation was planted to provide habitat and food for wildlife while shading the stream to moderate its temperature.

This project included updating a roof dripline trench, two underdrained soil filters, and one bioretention cell to treat runoff.