US Bridges

RTE 11B over Trout Brook

Fair

St. Lawrence County, New York · 4.8 MI W JCT SH 11B & SH · Structure no. 000000001009160

Built
1996
29 years old
Condition
Fair
inspected August 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
63 ft
1 main span
Daily traffic
2,424
2018 count
Owner
State
State Highway Agency

About this bridge

RTE 11B over Trout Brook is a prestressed concrete box beam or girders - multiple carrying RTE 11B over Trout Brook in St. Lawrence County, New York. It was built in 1996, so it is 29 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 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 2,424 vehicles a day, roughly 10% of them trucks, projected to reach 2,528 by 2041. The structure is 63 ft (19.2 m) long and 43 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesRTE 11B
CrossesTrout Brook
Location4.8 MI W JCT SH 11B & SH
RouteState Highway 11B
CountySt. Lawrence County
StateNew York
Coordinates44.68516, -74.80416
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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating97 US tons
Inventory rating51 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadHS 25 or greater
Structure length63 ft (19.2 m)
Longest span60 ft (18.2 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,424 (2018)
Projected traffic2,528 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 statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$779,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 11B over Trout Brook built?

It was built in 1996, making it 29 years old in 2025.

What condition is RTE 11B 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 August 2024.

How much traffic does RTE 11B over Trout Brook carry?

About 2,424 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is RTE 11B over Trout Brook?

The structure is 63 ft (19.2 m) long with a longest span of 60 ft (18.2 m) and a deck 43 ft wide.

Who owns RTE 11B over Trout Brook?

It is owned by the State Highway Agency.