US Bridges

RTE 11C over Trout Brook

Fair

St. Lawrence County, New York · 2.8 MI E JCT Rts 11 & 420 · Structure no. 000000001008880

Built
1997
28 years old
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
56 ft
1 main span
Daily traffic
1,185
2019 count
Owner
State
State Highway Agency

About this bridge

RTE 11C over Trout Brook is a prestressed concrete box beam or girders - multiple carrying RTE 11C over Trout Brook in St. Lawrence County, New York. It was built in 1997, so it is 28 years old, younger 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 56 ft (17.1 m) long and 37 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesRTE 11C
CrossesTrout Brook
Location2.8 MI E JCT Rts 11 & 420
RouteU.S. Route 11C
CountySt. Lawrence County
StateNew York
Coordinates44.80094, -74.73834
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating60 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadHS 25 or greater
Structure length56 ft (17.1 m)
Longest span52 ft (15.8 m)
Deck width37 ft (11.3 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,185 (2019)
Projected traffic1,236 by 2041
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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$948,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 11C over Trout Brook built?

It was built in 1997, making it 28 years old in 2025.

What condition is RTE 11C over Trout Brook 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 11C over Trout Brook carry?

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

How long is RTE 11C over Trout Brook?

The structure is 56 ft (17.1 m) long with a longest span of 52 ft (15.8 m) and a deck 37 ft wide.

Who owns RTE 11C over Trout Brook?

It is owned by the State Highway Agency.