Quincy-07A

Quincy

42.263640, -70.974002

Dimensions: 2.5ft diameter
Comments: According to a planset prepared by CLE Engineering (date unknown), there are two, 30 inch diameter culverts at the site.

Comprehensive field assessment conducted in 2024

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.

Legacy data from previous surveys and documentation

Invasive Species: Yes
Restoration Status: Unknown
Invasive Comments: Phragmites were observed upstream but not extensively.
Restoration Comments: The project was initially performed to control phragmites and restore salt marsh; however, it is unknown what the current status of the site is.

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 Plan: No
Operation Comments: Current operational strategy of the site is unknown.
Gate Comments: This was the first automatic electric sluice gate installed as a salt marsh restoration project in Massachusetts. Dimensions and condition are unknown. There is also a second tide gate at this location used solely for flood protection.

Elevation Comments: According to a planset prepared by CLE Engineering (date unknown), the invert of the tide gate at the upstream end of the restriction is 0.85 NGVD 1929.