US Bridges

Burnt Hill Road over Rock Brook

Fair

Somerset County, New Jersey · 0.4 MI N. of CR 518 · Structure no. 18D0207

Built
1998
27 years old
Condition
Fair
inspected October 2023
Type
Culvert
Concrete
Length
81 ft
3 main spans
Daily traffic
1,190
2023 count
Owner
County
County Highway Agency

About this bridge

Burnt Hill Road over Rock Brook is a concrete culvert carrying Burnt Hill Road over Rock Brook in Somerset County, New Jersey. It was built in 1998, so it is 27 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 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 1,190 vehicles a day, roughly 1% of them trucks, projected to reach 1,428 by 2043. The structure is 81 ft (24.7 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesBurnt Hill Road
CrossesRock Brook
Location0.4 MI N. of CR 518
RouteCity Street 0
CountySomerset County
StateNew Jersey
Coordinates40.41292, -74.68408
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating67 US tons
Inventory rating40 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length81 ft (24.7 m)
Longest span25 ft (7.6 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,190 (2023)
Projected traffic1,428 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Burnt Hill Road over Rock Brook built?

It was built in 1998, making it 27 years old in 2025.

What condition is Burnt Hill Road over Rock 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 October 2023.

How much traffic does Burnt Hill Road over Rock Brook carry?

About 1,190 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Burnt Hill Road over Rock Brook?

The structure is 81 ft (24.7 m) long with a longest span of 25 ft (7.6 m) and a deck 33 ft wide.

Who owns Burnt Hill Road over Rock Brook?

It is owned by the County Highway Agency.