Quincy-07C
Quincy
42.263640, -70.974002
Technical Specifications
Basic Properties
- Type
- Flap Gate
- Material
- Metal
- Condition
- Fair
- Geometry
- Circular
- Status
- Active
- Number of Gates
- 0
Operator & Management
- Operator Type
- PUBLIC
- Operator
- Town of Quincy
Dimensions & Elevations
- Dimensions
- 3ft diameter
Culvert Details
- Restriction Type
- Roadway
- Geometry
- Circular
- Material
- Concrete
- Number of Pipes
- 0
- Condition
- Good
- Comments
- There are two, 30 inch diameter culverts at the site.
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
- Moderate (10-60% of channel wid
Blockages & Issues
- Debris Blockages
- Moderate (10-60% of opening)
- Evidence of Overtopping
- No
Transect Measurements
50 Yards
- Open Water
- 5
- Salt Marsh
- 54
- Brackish
- 0
- Freshwater
- 0
- Ditch
- 0
- Unvegetated
- 0
150 Yards
- Open Water
- 7
- Salt Marsh
- 66
- Brackish
- 2
- Freshwater
- 0
- Ditch
- 0
- Unvegetated
- 0
300 Yards
- Open Water
- 5
- Salt Marsh
- 113
- Brackish
- 18
- Freshwater
- 0
- Ditch
- 0
- Unvegetated
- 0
Ecological Assessment
Habitat Observations
- Crab Burrow Intensity
- Moderate (10-60% banks are dens
- Ponding Depressions
- None
- Phragmites Present
- Limited (<10%)
- Ecological Impairment
- Limited
Invasive Species
- Upstream Invasive Species
- Yes
- Downstream Invasive Species
- No
- Invasive Species Notes
- Phragmites limited to upland fringe with some mixing in high tide bush.
- Additional Comments (2024)
- Efforts have been previously made to restore marsh. Talking with homeowners, the marsh has come a long way from mowed upland grasses to a healthier marsh. Low marsh only exists along channel but high marsh is abundant. Due to proximity of houses this may be as open as tide gate can be. Grate is partially covered in debris and may need regular maintenance.
Historical Records
Environmental Data
- Invasive Species
- Yes
- Invasive Comments
- Phragmities was observed upstream
Notes & Comments
- General Comments
- Tide gate is located directly off of Post Island Road to the southwest. Outfall is located on the beach to the northeast of Post Island Road and is submerged at high tide.
- Operation Comments
- The flap gate is completely closed and mostly submerged during the site visit.
- Gate Comments
- Rock crabs were seen covering the closed flap gate and some barnacles.
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