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Bridges, Structures and Waterways

This Section is responsible for the design, specifications and preparation of plans for the replacement and repair of all County bridges, docks, dams, spillways, bulkheads, marinas and other structures.

To confirm times that the locks at Shinnecock Canal open and close call (631) 852-8299.

This division is also responsible for the hydrographic surveys and dredging of County maintained channels, authorized by the Suffolk County Dredge Project Screening Committee. This includes dredging by the County dredge as well as with contractor equipment.

Hours of Operation of Drawbridges and Shinnecock Canal

  • The Bridge Operation and Maintenance Section is responsible for the maintenance and repair of over seventy bridges including the four bascule (movable) bridges operated by the County. These are Smith Point Bridge, Shirley; West Bay Bridge, Westhampton Beach; Beach Lane Bridge, Westhamton Beach; and Quogue Bridge Quogue.
  • In accordance with U.S. Coast Guard mandated operational hours, these bridges have operators on duty as follows:

October 1 through April 30 ( 8am to 4pm ) – Seven days per week
May 1 through September 30 ( 6am to 10pm ) – Seven days per week

  • To confirm times that the locks of Shinnecock Canal open and close, call (631) 852-8299

Additional information may be obtained by contacting the Highway/Fleet Maintenance Division at (631) 852-4070.

Weight Limits on Posted Bridges

No R Permit means:
30 tons maximum for a 10 wheeler
40 tons maximum for a tractor trailer

Posted Weights as of 2/6/2024

3 Penataquit Ave. Bridge Islip No R Permit 1932
7 Stevens Lane Bridge Southampton 10 Tons 1931
17 Dunemere Bridge East Hampton 10 Tons 1938
18 Coreys Creek Bridge Brookhaven 22 Tons 1947
19 Tuthills Creek Bridge Brookhaven No R Permit 1946
22 Quogue Bridge Southampton 20 Tons 1940
23 Towd Point Bridge Southampton No R Permit 1941
26 Yaphank Avenue Culvert/Spillway Brookhaven 40 Tons 1943
38 Ponquogue Bridge Southampton No R Permit 1986
46 Smith Point Bridge Brookhaven 15 Tons 1959
52 Hampton Bays Overpass Southampton No R Permit 1934
71 Landing Ave. Bridge Smithtown 10 Tons 1928

Suffolk County Government

H. Lee Dennison Bldg

100 Veterans Memorial Hwy
P.O. Box 6100
Hauppauge, NY 11788

Riverhead County Center

County Road 51
Riverhead, NY 11901