US Bridges

RTE 11C over ST Regis River

Fair

St. Lawrence County, New York · 1.4 MI NE JCT 11C & 420 · Structure no. 000000001008870

Built
1933
92 years old, rebuilt 1994
Condition
Fair
inspected October 2024
Type
Truss - Thru
Steel
Length
155 ft
1 main span
Daily traffic
1,185
2019 count
Owner
State
State Highway Agency

About this bridge

RTE 11C over ST Regis River is a steel truss - thru carrying RTE 11C over ST Regis River in St. Lawrence County, New York. It was built in 1933 and reconstructed in 1994, so it is 92 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 1,185 vehicles a day, roughly 7% of them trucks, projected to reach 1,236 by 2041. The structure is 155 ft (47.2 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesRTE 11C
CrossesST Regis River
Location1.4 MI NE JCT 11C & 420
RouteState Highway 11C
CountySt. Lawrence County
StateNew York
Coordinates44.80798, -74.77171
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
Deck8 Very GoodNo problems noted.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating34.3 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length155 ft (47.2 m)
Longest span150 ft (45.7 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck24 ft (7.3 m)

Traffic and service

Average daily traffic1,185 (2019)
Projected traffic1,236 by 2041
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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$4.6 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 11C over ST Regis River built?

It was built in 1933, making it 92 years old in 2025. It was reconstructed in 1994.

What condition is RTE 11C over ST Regis 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 October 2024.

How much traffic does RTE 11C over ST Regis River carry?

About 1,185 vehicles per day (2019 count), of which roughly 7% are trucks.

How long is RTE 11C over ST Regis River?

The structure is 155 ft (47.2 m) long with a longest span of 150 ft (45.7 m) and a deck 27 ft wide.

Who owns RTE 11C over ST Regis River?

It is owned by the State Highway Agency.