US Bridges

RTE 12 over Perch River

Good

Jefferson County, New York · 4.1 MI N JCT 12 & 342 · Structure no. 000000001009720

Built
1990
35 years old
Condition
Good
inspected April 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
77 ft
1 main span
Daily traffic
4,495
2018 count
Owner
State
State Highway Agency

About this bridge

RTE 12 over Perch River is a prestressed concrete box beam or girders - multiple carrying RTE 12 over Perch River in Jefferson County, New York. It was built in 1990, so it is 35 years old, younger than the New York average of 53 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,495 vehicles a day, roughly 9% of them trucks, projected to reach 4,689 by 2041. The structure is 77 ft (23.5 m) long and 43 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesRTE 12
CrossesPerch River
Location4.1 MI N JCT 12 & 342
RouteState Highway 12
Coordinates44.08441, -75.97537
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86 US tons
Inventory rating52 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length77 ft (23.5 m)
Longest span73 ft (22.2 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,495 (2018)
Projected traffic4,689 by 2041
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 12 over Perch River built?

It was built in 1990, making it 35 years old in 2025.

What condition is RTE 12 over Perch River 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 April 2024.

How much traffic does RTE 12 over Perch River carry?

About 4,495 vehicles per day (2018 count), of which roughly 9% are trucks.

How long is RTE 12 over Perch River?

The structure is 77 ft (23.5 m) long with a longest span of 73 ft (22.2 m) and a deck 43 ft wide.

Who owns RTE 12 over Perch River?

It is owned by the State Highway Agency.