Sandwich-03A
Sandwich, Long Creek/Cow River
41.749180, -70.440095
Technical Specifications
Basic Properties
- Type
- Flap Gate
- Material
- Metal
- Control
- Manual Gear
- Condition
- Fair
- Geometry
- Circular
- Status
- Active
- Number of Gates
- 1
Operator & Management
- Operator Type
- PUBLIC
- Purpose
- Other
Dimensions & Elevations
- Dimensions
- 3ft diameter, 3ft height
Culvert Details
- Restriction Type
- Roadway
- Geometry
- Circular
- Material
- Concrete
- Bottom Material
- Stone
- Number of Pipes
- 1
- Dimensions
- 3ft diameter
- Condition
- Good
2024 Field Survey Results
Comprehensive field assessment conducted in 2024Physical Conditions Assessment
Channel Conditions
- Channel Alteration
- Limited (<133 ft/acre)
- Channel Constriction
- Narrower than channel
- Channel Erosion
- Severe (>60% of bank)
- Sediment Deposits
- Limited (<10% of channel width)
Blockages & Issues
- Debris Blockages
- Limited (<10% of opening)
- Evidence of Overtopping
- No
Transect Measurements
50 Yards
- Open Water
- 0
- Salt Marsh
- 0
- Brackish
- 0
- Freshwater
- 0
- Ditch
- 0
- Unvegetated
- 0
150 Yards
- Open Water
- 0
- Salt Marsh
- 0
- Brackish
- 0
- Freshwater
- 0
- Ditch
- 0
- Unvegetated
- 0
300 Yards
- Open Water
- 0
- Salt Marsh
- 0
- Brackish
- 0
- Freshwater
- 0
- Ditch
- 0
- Unvegetated
- 0
Ecological Assessment
Habitat Observations
- Crab Burrow Intensity
- None
- Phragmites Present
- Severe (>60%)
- Ecological Impairment
- Severe
Invasive Species
- Upstream Invasive Species
- Yes
- Downstream Invasive Species
- No
- Invasive Species Notes
- Non ponded areas are dominated be phragmites.
- Additional Comments (2024)
- 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.
Historical Records
Environmental Data
- Invasive Species
- Yes
- 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
- Total: 79.71, Salt Marsh: 0
Notes & Comments
- Operation Plan
- No
- Operation Comments
- Tide gate was barely open and water was gushing out
- Gate Comments
- According to the Tide Gate Atlas, the upstream opening of the headwall is also fitted with a frame to support installation of stop logs.
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