US Bridges

Sni & Nsi Roadways over Rocky Brook

Fair

Mercer County, New Jersey · 0.3 MI South of Exit 8 · Structure no. M067270

Built
1950
75 years old, rebuilt 2013
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
96 ft
3 main spans
Daily traffic
97,420
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

Sni & Nsi Roadways over Rocky Brook is a steel stringer/multi-beam or girder carrying Sni & Nsi Roadways over Rocky Brook in Mercer County, New Jersey. It was built in 1950 and reconstructed in 2013, so it is 75 years old, older than the New Jersey average of 58.5 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 97,420 vehicles a day, roughly 1% of them trucks, projected to reach 189,370 by 2043. The structure is 96 ft (29.3 m) long and 147 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSni & Nsi Roadways
CrossesRocky Brook
Location0.3 MI South of Exit 8
RouteInterstate 95
CountyMercer County
StateNew Jersey
Coordinates40.25996, -74.51259
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.2 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length96 ft (29.3 m)
Longest span32 ft (9.8 m)
Deck width147 ft (44.8 m)
Roadway width139 ft (42.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic97,420 (2023)
Projected traffic189,370 by 2043
Trucks1%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a toll road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sni & Nsi Roadways over Rocky Brook built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 2013.

What condition is Sni & Nsi Roadways over Rocky Brook 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 April 2023.

How much traffic does Sni & Nsi Roadways over Rocky Brook carry?

About 97,420 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Sni & Nsi Roadways over Rocky Brook?

The structure is 96 ft (29.3 m) long with a longest span of 32 ft (9.8 m) and a deck 147 ft wide.

Who owns Sni & Nsi Roadways over Rocky Brook?

It is owned by the State Toll Authority.