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In 2012, the Maine Department of Transportation (MaineDOT) proposed a mitigation project at Long Reach Lane (LRL) in Harpswell to compensate for the functional impacts to marine wetlands associated with the construction of the Martin’s Point Bridge between Falmouth and Portland. The mitigation project was implemented in January and February 2014, and resulted in the successful replacement of a 36” (7.1 ft2 flow area) round concrete pipe beneath Long Reach Lane with a larger 6’ x 12’ concrete box culvert (72 ft2 flow area) in February 2014.

This report primarily presents the results of pre‐project monitoring, which occurred during the 2013 growing season, and Year 5 of post‐project monitoring, which occurred during the 2018 growing season, at the Long Marsh mitigation site. Years 1‐4 post‐project data from 2014‐2017 are also included in some instances, for context.





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