US Bridges

RTE I81 over Black River

Fair

Jefferson County, New York · JCT RTE I-81 NB + Black R · Structure no. 000000001032182

Built
1959
66 years old, rebuilt 2003
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
357 ft
4 main spans
Daily traffic
11,646
2019 count
Owner
State
State Highway Agency

About this bridge

RTE I81 over Black River is a steel continuous stringer/multi-beam or girder carrying RTE I81 over Black River in Jefferson County, New York. It was built in 1959 and reconstructed in 2003, so it is 66 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 6 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 14% of them trucks, projected to reach 15,198 by 2041. The structure is 357 ft (108.8 m) long and 37 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesRTE I81
CrossesBlack River
LocationJCT RTE I-81 NB + Black R
RouteInterstate 81
Coordinates43.99566, -75.93369
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88 US tons
Inventory rating53 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length357 ft (108.8 m)
Longest span94 ft (28.6 m)
Deck width37 ft (11.2 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,646 (2019)
Projected traffic15,198 by 2041
Trucks14%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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$5.4 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE I81 over Black River built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2003.

What condition is RTE I81 over Black River 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 November 2023.

How much traffic does RTE I81 over Black River carry?

About 11,646 vehicles per day (2019 count), of which roughly 14% are trucks.

How long is RTE I81 over Black River?

The structure is 357 ft (108.8 m) long with a longest span of 94 ft (28.6 m) and a deck 37 ft wide.

Who owns RTE I81 over Black River?

It is owned by the State Highway Agency.