US Bridges

Perch Lake Road over RTE I81 RTE I81

Fair

Jefferson County, New York · 2.7 MI N JCT I81 & SH 342 · Structure no. 000000001043300

Built
1965
60 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
365 ft
6 main spans
Daily traffic
327
2017 count
Owner
State
State Highway Agency

About this bridge

Perch Lake Road over RTE I81 RTE I81 is a steel stringer/multi-beam or girder carrying Perch Lake Road over RTE I81 RTE I81 in Jefferson County, New York. It was built in 1965, so it is 60 years old, older than the New York average of 53 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 327 vehicles a day, roughly 17% of them trucks, projected to reach 458 by 2037. The structure is 365 ft (111.3 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesPerch Lake Road
CrossesRTE I81 RTE I81
Location2.7 MI N JCT I81 & SH 342
CountyJefferson County
StateNew York
Coordinates44.07375, -75.91812
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
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.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating30.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length365 ft (111.3 m)
Longest span61 ft (18.6 m)
Deck width35 ft (10.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic327 (2017)
Projected traffic458 by 2037
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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$4.1 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Perch Lake Road over RTE I81 RTE I81 built?

It was built in 1965, making it 60 years old in 2025.

What condition is Perch Lake Road over RTE I81 RTE I81 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 2024.

How much traffic does Perch Lake Road over RTE I81 RTE I81 carry?

About 327 vehicles per day (2017 count), of which roughly 17% are trucks.

How long is Perch Lake Road over RTE I81 RTE I81?

The structure is 365 ft (111.3 m) long with a longest span of 61 ft (18.6 m) and a deck 35 ft wide.

Who owns Perch Lake Road over RTE I81 RTE I81?

It is owned by the State Highway Agency.