US Bridges

Mountain Avenue over Corys Brook

Good

Somerset County, New Jersey · 0.2 MI W of Sawmill Road · Structure no. 18K1102

Built
2011
14 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
37 ft
1 main span
Daily traffic
4,006
2023 count
Owner
County
County Highway Agency

About this bridge

Mountain Avenue over Corys Brook is a steel stringer/multi-beam or girder carrying Mountain Avenue over Corys Brook in Somerset County, New Jersey. It was built in 2011, so it is 14 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,006 vehicles a day, roughly 3% of them trucks, projected to reach 4,888 by 2043. The structure is 37 ft (11.3 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesMountain Avenue
CrossesCorys Brook
Location0.2 MI W of Sawmill Road
RouteCity Street 0
CountySomerset County
StateNew Jersey
Coordinates40.65015, -74.50163
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length37 ft (11.3 m)
Longest span32 ft (9.8 m)
Deck width36 ft (11.1 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,006 (2023)
Projected traffic4,888 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Mountain Avenue over Corys Brook built?

It was built in 2011, making it 14 years old in 2025.

What condition is Mountain Avenue over Corys Brook in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does Mountain Avenue over Corys Brook carry?

About 4,006 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Mountain Avenue over Corys Brook?

The structure is 37 ft (11.3 m) long with a longest span of 32 ft (9.8 m) and a deck 36 ft wide.

Who owns Mountain Avenue over Corys Brook?

It is owned by the County Highway Agency.