US Bridges

Jessup Lane over Moriches Bay

Fair

Suffolk County, New York · S of Westhampton Beach · Structure no. 000000003300450

Built
1983
42 years old
Condition
Fair
inspected July 2024
Type
Movable - Bascule
Steel
Length
392 ft
1 main span
Daily traffic
7,415
2020 count
Owner
County
County Highway Agency

About this bridge

Jessup Lane over Moriches Bay is a steel movable - bascule carrying Jessup Lane over Moriches Bay in Suffolk County, New York. It was built in 1983, so it is 42 years old, younger than the New York average of 53 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 7,415 vehicles a day, roughly 4% of them trucks, projected to reach 9,007 by 2041. The structure is 392 ft (119.5 m) long and 34 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesJessup Lane
CrossesMoriches Bay
LocationS of Westhampton Beach
CountySuffolk County
StateNew York
Coordinates40.79607, -72.64516
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating85.2 US tons
Inventory rating36 US tons

Structure

Structure typeMovable - Bascule
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+7 approach)
Design loadHS 20
Structure length392 ft (119.5 m)
Longest span78 ft (23.7 m)
Deck width34 ft (10.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,415 (2020)
Projected traffic9,007 by 2041
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$25 million (2024 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Jessup Lane over Moriches Bay built?

It was built in 1983, making it 42 years old in 2025.

What condition is Jessup Lane over Moriches Bay in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2024.

How much traffic does Jessup Lane over Moriches Bay carry?

About 7,415 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Jessup Lane over Moriches Bay?

The structure is 392 ft (119.5 m) long with a longest span of 78 ft (23.7 m) and a deck 34 ft wide.

Who owns Jessup Lane over Moriches Bay?

It is owned by the County Highway Agency.