Truro-04
Truro, Little Palmer River
41.999157, -70.078249
Technical Specifications
Basic Properties
- Type
- —
- Material
- —
- Control
- —
- Condition
- Fair
- Geometry
- Round
- Status
- —
- Number of Gates
- 1
Operator & Management
- Operator Type
- Municipal
- Operator
- Town of Truro
- Permits
- —
- Purpose
- —
Dimensions & Elevations
- Dimensions
- 2ft diameter
- Invert Elevation
- —
- Installation Date
- —
- Tidal Influence
- Upstream: N/A NAVD88, Downstream: -7.03 NAVD88
Culvert Details
- Restriction Type
- —
- Geometry
- —
- Material
- —
- Bottom Material
- —
- Number of Pipes
- —
- Dimensions
- —
- Condition
- —
- Comments
- —
Salt Marsh Field Assessment Results
Comprehensive field assessment dataPhysical Conditions Assessment
Channel Conditions
- Channel Alteration and Ditching
- Moderate (133-398 ft/acre)
- Channel Constriction
- Narrower than channel
- Channel Erosion
- Little (<10% of bank)
- Sediment Deposits
- Moderate (10-60% of channel wid
Blockages
- Debris Blockages
- None
- Evidence of Overtopping
- No
Ecological Assessment
Habitat Observations
- Ecological Impairment due to Tide Gate
- Severe
- Crab Burrow Intensity
- None
- Ponding and Die-off Depressions
- Limited(<10% of marsh platform
- Phragmites Present
- Severe (>60%)
Invasive Species
- Upstream Invasive Species
- Yes
- Downstream Invasive Species
- No
- Invasive Species Notes
- —
General Comments
Town already plans to remove both Truro tide gates and restore upstream salt marsh. Culverts allowing ground water seepage into pipe and back flowing upstream during low tide. Flapper replaced in 2019. Upstream channel has been straightened and is ditch surrounded by upland for about 260’. Dense phragmites surrounds channel further upstream. Cattails were observed even further upstream indicating very limited tidal flushing and mostly a freshwater wetland.Habitat Transects
First Transect (50 yards upstream of tide gate)
Second Transect (150 yards upstream of tide gate)
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
- —
- Restoration Status
- —
- Invasive Comments
- —
- Restoration Comments
- —
- Upstream Area
- —
Notes & Comments
- General Comments
- Flapper slightly open at low outgoing tide. Lined with 18” HDPE in sections. Town plans to remove and replace.
- 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.