US Bridges

Thompson AVE(CR525 over Middle Brook

Fair

Somerset County, New Jersey · 0.39 MI North US 22 · Structure no. 18H0812

Built
1936
89 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
67 ft
1 main span
Daily traffic
11,646
2023 count
Owner
County
County Highway Agency

About this bridge

Thompson AVE(CR525 over Middle Brook is a steel stringer/multi-beam or girder carrying Thompson AVE(CR525 over Middle Brook in Somerset County, New Jersey. It was built in 1936, so it is 89 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 11,646 vehicles a day, roughly 3% of them trucks, projected to reach 14,211 by 2043. The structure is 67 ft (20.4 m) long and 38 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesThompson AVE(CR525
CrossesMiddle Brook
Location0.39 MI North US 22
RouteCounty Highway 525
CountySomerset County
StateNew Jersey
Coordinates40.57941, -74.5573
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating47 US tons
Inventory rating28 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length67 ft (20.4 m)
Longest span64 ft (19.5 m)
Deck width38 ft (11.6 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,646 (2023)
Projected traffic14,211 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 with deck rehabilitation or replacement
Estimated improvement cost$1.1 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Thompson AVE(CR525 over Middle Brook built?

It was built in 1936, making it 89 years old in 2025.

What condition is Thompson AVE(CR525 over Middle 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 Thompson AVE(CR525 over Middle Brook carry?

About 11,646 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Thompson AVE(CR525 over Middle Brook?

The structure is 67 ft (20.4 m) long with a longest span of 64 ft (19.5 m) and a deck 38 ft wide.

Who owns Thompson AVE(CR525 over Middle Brook?

It is owned by the County Highway Agency.