Chelsea-01A
Chelsea, Island End River
42.390086, -71.052154
Technical Specifications
Basic Properties
- Type
- Flap Gate
- Material
- Wood
- Control
- —
- Condition
- Fair
- Geometry
- Rectangular
- Status
- Active
- Number of Gates
- 2
Operator & Management
- Operator Type
- PUBLIC
- Operator
- —
- Permits
- MS5
- Purpose
- Flood Protection
Dimensions & Elevations
- Dimensions
- —
- Invert Elevation
- —
- Installation Date
- —
- Tidal Influence
- —
Culvert Details
- Restriction Type
- Other
- Geometry
- Other
- Material
- —
- Bottom Material
- —
- Number of Pipes
- —
- Dimensions
- —
- Condition
- —
- Comments
- —
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
- —
Notes & Comments
- General Comments
- Location of tidegate approximate based on review of aerial imagery (Google Earth, Bing bird's eye)
- Operation Plan
- —
- Operation Comments
- —
- Gate Comments
- —
- Elevation Comments
- —
- Visit Comments
- —
- Other Comments
- —
- External Data Comments
- —
Part of the Massachusetts Bays Program© 2026 Massachusetts Bays Program. Monitoring tidegates across Massachusetts.