US Bridges

RTE 346 over Little Hoosic River

Fair

Rensselaer County, New York · 0.3 MI E JCT Rts 22 & 346 · Structure no. 000000001046240

Built
1922
103 years old, rebuilt 1999
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
92 ft
1 main span
Daily traffic
1,616
2021 count
Owner
State
State Highway Agency

About this bridge

RTE 346 over Little Hoosic River is a prestressed concrete box beam or girders - multiple carrying RTE 346 over Little Hoosic River in Rensselaer County, New York. It was built in 1922 and reconstructed in 1999, so it is 103 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 1,616 vehicles a day, roughly 10% of them trucks, projected to reach 1,685 by 2041. The structure is 92 ft (28 m) long and 26 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesRTE 346
CrossesLittle Hoosic River
Location0.3 MI E JCT Rts 22 & 346
RouteState Highway 346
CountyRensselaer County
StateNew York
Coordinates42.82301, -73.32664
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
Deck7 GoodSome minor problems.
Superstructure9 ExcellentNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating50 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length92 ft (28 m)
Longest span89 ft (27.1 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,616 (2021)
Projected traffic1,685 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$1.5 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 346 over Little Hoosic River built?

It was built in 1922, making it 103 years old in 2025. It was reconstructed in 1999.

What condition is RTE 346 over Little Hoosic 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 May 2023.

How much traffic does RTE 346 over Little Hoosic River carry?

About 1,616 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is RTE 346 over Little Hoosic River?

The structure is 92 ft (28 m) long with a longest span of 89 ft (27.1 m) and a deck 26 ft wide.

Who owns RTE 346 over Little Hoosic River?

It is owned by the State Highway Agency.