US Bridges

Lake Road over Harrisons Brook

Fair

Somerset County, New Jersey · 0.69 MI East of Rt 525 · Structure no. 18G1205

Built
1969
56 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete
Length
28 ft
2 main spans
Daily traffic
3,293
2023 count
Owner
County
County Highway Agency

About this bridge

Lake Road over Harrisons Brook is a concrete culvert carrying Lake Road over Harrisons Brook in Somerset County, New Jersey. It was built in 1969, so it is 56 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 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 3,293 vehicles a day, roughly 3% of them trucks, projected to reach 4,018 by 2043. The structure is 28 ft (8.5 m) long and 52 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesLake Road
CrossesHarrisons Brook
Location0.69 MI East of Rt 525
RouteCity Street 0
CountySomerset County
StateNew Jersey
Coordinates40.69237, -74.56733
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating72 US tons
Inventory rating43 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length28 ft (8.5 m)
Longest span11 ft (3.4 m)
Deck width52 ft (15.7 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,293 (2023)
Projected traffic4,018 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Lake Road over Harrisons Brook built?

It was built in 1969, making it 56 years old in 2025.

What condition is Lake Road over Harrisons 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 Lake Road over Harrisons Brook carry?

About 3,293 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Lake Road over Harrisons Brook?

The structure is 28 ft (8.5 m) long with a longest span of 11 ft (3.4 m) and a deck 52 ft wide.

Who owns Lake Road over Harrisons Brook?

It is owned by the County Highway Agency.