Presumpscot Watershed Initiative

Geospatial Database

Instructions: click on any of the numbered sites
on the map above to view details and photos.

Highland Lake / Mill Brook Watershed

Location:

The Highland Lake / Mill Brook watershed is located in Windham, Westbrook and Falmouth. It extends nearly 8 1/2 miles from above Little Duck Pond in Windham, to East Bridge Street in Westbrook.

Size:

The Highland Lake / Mill Brook watershed is one of the larger sub-watersheds in the Presumpscot River watershed system. At approximately 13 1/2 square miles, it makes up about 7% of the Presumpscot River watershed system.

Population:

The population of the Highland Lake / Mill Brook watershed is a just under 4,400, or 7% of the population in the Presumpscot River watershed system.

Impervious Surfaces:

Impervious surfaces are those surfaces in the landscape that cannot infiltrate rainfall, such as rooftops, pavement, sidewalks, driveways and compacted earth. Impervious surface areas of 10% or greater are often correlated with reduced water quality. Approximately 5% of the Highland Lake / Mill Brook watershed, more than 400 acres, is comprised of impervious surfaces.

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