US Bridges

County Road 54 over Allen Brook

Poor

St. Lawrence County, New York · 2 MI W of Lawrenceville · Structure no. 000000003341170

Built
1928
97 years old, rebuilt 1984
Condition
Poor
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
33 ft
1 main span
Daily traffic
253
2021 count
Owner
County
County Highway Agency

About this bridge

County Road 54 over Allen Brook is a steel stringer/multi-beam or girder carrying County Road 54 over Allen Brook in St. Lawrence County, New York. It was built in 1928 and reconstructed in 1984, so it is 97 years old, older than the New York average of 53 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 253 vehicles a day, roughly 7% of them trucks, projected to reach 354 by 2041. The structure is 33 ft (10.1 m) long and 36 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

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CarriesCounty Road 54
CrossesAllen Brook
Location2 MI W of Lawrenceville
RouteCounty Highway 0
CountySt. Lawrence County
StateNew York
Coordinates44.76614, -74.69003
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating79 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length33 ft (10.1 m)
Longest span31 ft (9.4 m)
Deck width36 ft (10.9 m)
Roadway width34 ft (10.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic253 (2021)
Projected traffic354 by 2041
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$647,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 54 over Allen Brook built?

It was built in 1928, making it 97 years old in 2025. It was reconstructed in 1984.

What condition is County Road 54 over Allen Brook in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.

How much traffic does County Road 54 over Allen Brook carry?

About 253 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is County Road 54 over Allen Brook?

The structure is 33 ft (10.1 m) long with a longest span of 31 ft (9.4 m) and a deck 36 ft wide.

Who owns County Road 54 over Allen Brook?

It is owned by the County Highway Agency.