US Bridges

RTE 12D over Sugar River

Fair

Lewis County, New York · 4.5 MI S JCT 12D + 26 · Structure no. 000000001010020

Built
1970
55 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
266 ft
3 main spans
Daily traffic
981
2020 count
Owner
State
State Highway Agency

About this bridge

RTE 12D over Sugar River is a steel stringer/multi-beam or girder carrying RTE 12D over Sugar River in Lewis County, New York. It was built in 1970, so it is 55 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 981 vehicles a day, roughly 12% of them trucks, projected to reach 1,023 by 2041. The structure is 266 ft (81.1 m) long and 50 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesRTE 12D
CrossesSugar River
Location4.5 MI S JCT 12D + 26
RouteState Highway 12D
CountyLewis County
StateNew York
Coordinates43.53819, -75.36611
Functional classRural Major 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
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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69 US tons
Inventory rating37 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length266 ft (81.1 m)
Longest span124 ft (37.7 m)
Deck width50 ft (15.2 m)
Roadway width47 ft (14.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic981 (2020)
Projected traffic1,023 by 2041
Trucks12%
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

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$4.4 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 12D over Sugar River built?

It was built in 1970, making it 55 years old in 2025.

What condition is RTE 12D over Sugar 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 September 2023.

How much traffic does RTE 12D over Sugar River carry?

About 981 vehicles per day (2020 count), of which roughly 12% are trucks.

How long is RTE 12D over Sugar River?

The structure is 266 ft (81.1 m) long with a longest span of 124 ft (37.7 m) and a deck 50 ft wide.

Who owns RTE 12D over Sugar River?

It is owned by the State Highway Agency.