US Bridges

CR 512 (lib CR Rd) over Mine Brook

Fair

Somerset County, New Jersey · 0.27 MI East of US 202 · Structure no. 18E1203

Built
1930
95 years old
Condition
Fair
inspected August 2023
Type
Arch - Deck
Concrete
Length
24 ft
1 main span
Daily traffic
6,626
2023 count
Owner
County
County Highway Agency

About this bridge

CR 512 (lib CR Rd) over Mine Brook is a concrete arch - deck carrying CR 512 (lib CR Rd) over Mine Brook in Somerset County, New Jersey. It was built in 1930, so it is 95 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 5 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 6,626 vehicles a day, roughly 3% of them trucks, projected to reach 7,952 by 2043. The structure is 24 ft (7.3 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCR 512 (lib CR Rd)
CrossesMine Brook
Location0.27 MI East of US 202
RouteCounty Highway 512
CountySomerset County
StateNew Jersey
Coordinates40.68234, -74.6301
Functional classUrban Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42 US tons
Inventory rating25 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width30 ft (9.1 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,626 (2023)
Projected traffic7,952 by 2043
Trucks3%
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$512,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 512 (lib CR Rd) over Mine Brook built?

It was built in 1930, making it 95 years old in 2025.

What condition is CR 512 (lib CR Rd) over Mine 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 August 2023.

How much traffic does CR 512 (lib CR Rd) over Mine Brook carry?

About 6,626 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is CR 512 (lib CR Rd) over Mine Brook?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m) and a deck 30 ft wide.

Who owns CR 512 (lib CR Rd) over Mine Brook?

It is owned by the County Highway Agency.