US Bridges

Birch ST (cr 77) over Gsp SB

Good

Ocean County, New Jersey · 2 MI S of RT37 & Gsp JCT · Structure no. 360802S

Built
2011
14 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
102 ft
1 main span
Daily traffic
5,576
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

Birch ST (cr 77) over Gsp SB is a steel stringer/multi-beam or girder carrying Birch ST (cr 77) over Gsp SB in Ocean County, New Jersey. It was built in 2011, so it is 14 years old, younger than the New Jersey average of 58.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,576 vehicles a day, roughly 3% of them trucks, projected to reach 6,804 by 2043. The structure is 102 ft (31.1 m) long and 58 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesBirch ST (cr 77)
CrossesGsp SB
Location2 MI S of RT37 & Gsp JCT
RouteCounty Highway 77
Coordinates39.93349, -74.20933
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.6 US tons
Inventory rating49.6 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length102 ft (31.1 m)
Longest span96 ft (29.3 m)
Deck width58 ft (17.7 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,576 (2023)
Projected traffic6,804 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Birch ST (cr 77) over Gsp SB built?

It was built in 2011, making it 14 years old in 2025.

What condition is Birch ST (cr 77) over Gsp SB in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2023.

How much traffic does Birch ST (cr 77) over Gsp SB carry?

About 5,576 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Birch ST (cr 77) over Gsp SB?

The structure is 102 ft (31.1 m) long with a longest span of 96 ft (29.3 m) and a deck 58 ft wide.

Who owns Birch ST (cr 77) over Gsp SB?

It is owned by the State Toll Authority.