US Bridges

County Road 27 over Obrien Brook

Good

St. Lawrence County, New York · 2.6 MI N of Clare · Structure no. 000000003340760

Built
1956
69 years old, rebuilt 1996
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
27 ft
1 main span
Daily traffic
513
2015 count
Owner
County
County Highway Agency

About this bridge

County Road 27 over Obrien Brook is a steel stringer/multi-beam or girder carrying County Road 27 over Obrien Brook in St. Lawrence County, New York. It was built in 1956 and reconstructed in 1996, so it is 69 years old, older than the New York average of 53 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 513 vehicles a day, roughly 7% of them trucks, projected to reach 535 by 2041. The structure is 27 ft (8.2 m) long and 32 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

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CarriesCounty Road 27
CrossesObrien Brook
Location2.6 MI N of Clare
RouteCounty Highway 0
CountySt. Lawrence County
StateNew York
Coordinates44.43536, -75.05597
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
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 rating78 US tons
Inventory rating47 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length27 ft (8.2 m)
Longest span24 ft (7.3 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic513 (2015)
Projected traffic535 by 2041
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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$500,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 27 over Obrien Brook built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1996.

What condition is County Road 27 over Obrien Brook in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does County Road 27 over Obrien Brook carry?

About 513 vehicles per day (2015 count), of which roughly 7% are trucks.

How long is County Road 27 over Obrien Brook?

The structure is 27 ft (8.2 m) long with a longest span of 24 ft (7.3 m) and a deck 32 ft wide.

Who owns County Road 27 over Obrien Brook?

It is owned by the County Highway Agency.