Cohasset-05
Cohasset, James Brook
42.239853, -70.794216
Technical Specifications
Basic Properties
- Type
- Sluice Gate
- Material
- Metal
- Control
- Electric Actuator
- Condition
- —
- Geometry
- —
- Status
- Active
- Number of Gates
- 1
Operator & Management
- Operator Type
- PUBLIC
- Operator
- Town of Cohasset
- Permits
- Ch 91, ACOE
- Purpose
- —
Dimensions & Elevations
- Dimensions
- —
- Invert Elevation
- —
- Installation Date
- 2011
- Tidal Influence
- —
Culvert Details
- Restriction Type
- Roadway
- Geometry
- Rectangular
- Material
- Concrete
- Bottom Material
- —
- Number of Pipes
- 1
- Dimensions
- 2.5ft diameter, 2.5ft height
- Condition
- —
- Comments
- Seaward side of gate not visible at high tide / restriction on the upstream side
Restoration Potential
Assessment
- Salt Marsh Impairment due to Tidal Restriction
- Moderate
- Potential Extent of Marsh Restoration
- Moderate
- Implementation Feasibility
- High
- Restoration Priority
- High
- Recommended Improvement Type
- O&M and Infrastructure
Notes
Site shows moderate salt marsh impairment due to restricted tidal flow. Replacement with self-regulating tide gate could restore approximately 5-8 acres of degraded marsh habitat. Good access for construction equipment. Regional coordination completed with town DPW and conservation commission.Historical Records
Environmental Data
- Invasive Species
- —
- Restoration Status
- —
- Invasive Comments
- —
- Restoration Comments
- —
- Upstream Area
- Salt Marsh: 10-20 acres
Notes & Comments
- General Comments
- —
- Operation Plan
- —
- Operation Comments
- Controlling Elevation of 7.7 per tide gate O&M plan/TAC. Interagency TAC assisting Town with implementation of tide gate O&M plan
- Gate Comments
- Single Automatically actuated sluice gate installed
- Elevation Comments
- —
- Visit Comments
- —
- Other Comments
- —
- External Data Comments
- US ACOE CENAE-R-2009-00101 Permit 9.19.2016 MA DEP Ch 91 No. 12568 10.14.2009 US ACOE CENAE-R-2009-00101 5.19.2009 (Tide Gate and Operation Plan is included as attachment to ACOE Permit) US ACOE CENAE-R-2009-00101 Modification 3.4.2011 US ACOE CENAE-R-2009-00101 Permit Compliance and Inspection Report 11.7.2013 US ACOE CENAE-R-2009-00101 Compliance Correspondence 8.15.2014 Draft Final Engineering Design Plans dated June 2010 in "Other" folder. James Brook Tide Gate Annual Report (Monitoring Data) 7.2014 Jacob's Meadow Salinity Monitoring Data (with Pictures) 7.9.2014
Part of the Massachusetts Bays Program© 2026 Massachusetts Bays Program. Monitoring tidegates across Massachusetts.