Sandwich-03C
Sandwich, Long Creek/Cow River
41.749180, -70.440095
Technical Specifications
Basic Properties
- Type
- Stop Logs
- Material
- —
- Control
- —
- Condition
- —
- Geometry
- Rectangular
- Status
- Inactive
- Number of Gates
- 0
Operator & Management
- Operator Type
- PUBLIC
- Operator
- —
- Permits
- —
- Purpose
- —
Dimensions & Elevations
- Dimensions
- —
- Invert Elevation
- —
- Installation Date
- —
- Tidal Influence
- —
Culvert Details
- Restriction Type
- Roadway
- Geometry
- Circular
- Material
- Concrete
- Bottom Material
- —
- Number of Pipes
- 0
- Dimensions
- 3ft diameter
- Condition
- Good
- Comments
- —
Salt Marsh Field Assessment Results
Comprehensive field assessment dataPhysical Conditions Assessment
Channel Conditions
- Channel Alteration and Ditching
- Limited (<133 ft/acre)
- Channel Constriction
- Narrower than channel
- Channel Erosion
- Severe (>60% of bank)
- Sediment Deposits
- Limited (<10% of channel width)
Blockages
- Debris Blockages
- Limited (<10% of opening)
- Evidence of Overtopping
- No
Ecological Assessment
Habitat Observations
- Ecological Impairment due to Tide Gate
- Severe
- Crab Burrow Intensity
- None
- Ponding and Die-off Depressions
- —
- Phragmites Present
- Severe (>60%)
Invasive Species
- Upstream Invasive Species
- Yes
- Downstream Invasive Species
- No
- Invasive Species Notes
- Non ponded areas are dominated be phragmites.
General Comments
Flapper appears to left closed and is inhibiting salt water exchange as indicated by ponding and dense phragmites growth. Channel in front of up stream headwall is scouring and widening out, may be indicator of undersized culvert.Habitat Transects
First Transect (50 yards upstream of tide gate)
No data
Second Transect (150 yards upstream of tide gate)
No data
Third Transect (300 yards upstream of tide gate)
No data
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
- Yes
- Restoration Status
- —
- Invasive Comments
- Lots of phragmites observed upstream
- Restoration Comments
- A restoration feasibility study was produced in June 2013 by the Cape Cod Conservation District, as part of the Cape Cod Water Resources Restoration Project.
- Upstream Area
- —
Notes & Comments
- General Comments
- —
- Operation Plan
- —
- Operation Comments
- No stop logs were observed at the site.
- Gate Comments
- Metal and concrete grooves for stop logs were observed on the upstream side of the culvert.
- Elevation Comments
- —
- Visit Comments
- —
- Other Comments
- —
- External Data Comments
- —
Part of the Massachusetts Bays Program© 2026 Massachusetts Bays Program. Monitoring tidegates across Massachusetts.