Fall Brook


This project is now complete.

About Fall Brook

Fall Brook is a 2.5-mile long meandering stream that starts at the Lyman-Moore School and flows under Baxter Boulevard to Back Cove. Some sections of the Brook flow through forested areas and grassed pastures, while other sections are piped underground. Water typically flows through Fall Brook during large rain storms, when it serves as a drainage way to carry water from Portland’s streets to Back Cove.

Since 1990, Portland has been working to separate our combined sewer overflows (CSO) so that sewage is piped to the wastewater treatment plant, and runoff is directed to local waterways.

Fall Brook Phase I

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A number of culverts along Fall Brook needed to be replaced and upgraded in order to accommodate the increased flow of runoff through the Brook, including culverts on Ocean Avenue, Washington Avenue, and Ray Street.

The Brook’s floodplain also needed to be widened between Washington Avenue and Ray Street to accommodate the increased flow through the Brook. This process required the City to remove a number of large trees. While we were disappointed to have to remove trees from the area, the stream banks have been replanted with more than 16,000 new willows and dogwood shrubs, and thanks to students from Presumpscot School and volunteers from Maine DEP, 500 new trees were also planted throughout the area. We are happy with the condition of the new vegetation and look forward to seeing the plants continue to thrive.

One of the highlights of this phase of the project was seeing the reconnection of Milliken Brook into Fall Brook. Milliken Brook is a small stream that flows from the Morrill’s Corner area behind the First Baptist Church on Canco Road. This Brook has flowed into the City’s sewer system since the early 1960s and has finally been returned to its historical confluence with Fall Brook.

Fall Brook Phase II

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Phase 2 of Fall Brook improvements focused on a 2000-foot section of the Brook upstream of Milliken Brook (off Ray Street).
The channel improvements included the following major design features:
  • Hydraulic improvements to the Fall Brook drainage way;
  • Installation of the Fall Brook box culverts;
  • Reconstruction of the St. Joseph’s Manor driveway;
  • Temporary access to St. Joseph’s Manor;
  • Installation of box culvert in Maine Avenue and Washington Avenue;
  • Reconstruction of Maine Avenue;
  • Installation of surface drain for existing Fall Brook;
  • Surface restoration and erosion control;
  • Provisions for utilities.

Fall Brook Phase III

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Phase 3 of Fall Brook improvements continued the work initiated in Phase 2 of the project by replacing and increasing the size of culverts farther upstream in Fall Brook between Maine Avenue and Allen Avenue.
The channel improvements included the following major design features:
  • Hydraulic improvements to the Fall Brook drainage way;
  • Installation of the Fall Brook Phase 3 box culvert;
  • Installation of a 48” storm drain from the end of the box culvert in Northport to the north side of Allen Avenue;
  • Installation of a 48” storm drain from the end of the box culvert in Northport toward Washington Avenue and end on the west side of Washington Avenue;
  • Surface restoration and erosion control;
  • Provisions for utilities.

Fall Brook Phase IV

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Phase 4 of the Fall Brook improvements continued the work of Phases 2 and 3 by replacing and increasing the size of culvers from Allen Avenue to the Northgate Shopping Plaza beside Fall Brook. Installation of drainage stopped at Northgate Shopping Center and installation of sanitary new sewer began and extended to the north side of Lyseth-Moore Drive.
The channel improvements included the following major design features:
  • Hydraulic improvements to the Fall Brook drainage way;
  • Construction of a temporary haul road;
  • Installation of a 48” storm drain from the north side of Allen Avenue for 500 feet;
  • Installation of a 24” sewer from the point where the SD ends for 900 feet, just past the new CVS building;
  • Installation of a 21” sewer from the point where the 24” left off for an additional 825 feet ending at the north side of Lyseth-Moore Drive;
  • Surface restoration and erosion control;
  • Provisions for utilities.
Documents