US Bridges

Hardscrabble Road over Indian Grove Brook

Fair

Somerset County, New Jersey · At Old Army RD Intersect · Structure no. 18H1402

Built
1900
125 years old, rebuilt 1982
Condition
Fair
inspected September 2023
Type
Slab
Wood or Timber
Length
25 ft
1 main span
Daily traffic
2,304
2023 count
Owner
County
County Highway Agency

About this bridge

Hardscrabble Road over Indian Grove Brook is a wood or timber slab carrying Hardscrabble Road over Indian Grove Brook in Somerset County, New Jersey. It was built in 1900 and reconstructed in 1982, so it is 125 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 2,304 vehicles a day, roughly 1% of them trucks, projected to reach 2,764 by 2043. The structure is 25 ft (7.6 m) long and 20 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesHardscrabble Road
CrossesIndian Grove Brook
LocationAt Old Army RD Intersect
RouteCity Street 0
CountySomerset County
StateNew Jersey
Coordinates40.7415, -74.55122
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating92 US tons
Inventory rating67 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20 + Mod
Structure length25 ft (7.6 m)
Longest span22 ft (6.7 m)
Deck width20 ft (6.2 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,304 (2023)
Projected traffic2,764 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 of existing bridge without deck rehabilitation
Estimated improvement cost$346,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Hardscrabble Road over Indian Grove Brook built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1982.

What condition is Hardscrabble Road over Indian Grove 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 September 2023.

How much traffic does Hardscrabble Road over Indian Grove Brook carry?

About 2,304 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Hardscrabble Road over Indian Grove Brook?

The structure is 25 ft (7.6 m) long with a longest span of 22 ft (6.7 m) and a deck 20 ft wide.

Who owns Hardscrabble Road over Indian Grove Brook?

It is owned by the County Highway Agency.