US Bridges

County Road 18 over Campbell Brook

Poor

Otsego County, New York · 1.2 MI S Unadilla Forks · Structure no. 000000003354030

Built
1931
94 years old, rebuilt 1950
Condition
Poor
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
514
2017 count
Owner
County
County Highway Agency

About this bridge

County Road 18 over Campbell Brook is a steel stringer/multi-beam or girder carrying County Road 18 over Campbell Brook in Otsego County, New York. It was built in 1931 and reconstructed in 1950, so it is 94 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 514 vehicles a day, roughly 5% of them trucks, projected to reach 536 by 2041. The structure is 31 ft (9.4 m) long and 32 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

Location

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CarriesCounty Road 18
CrossesCampbell Brook
Location1.2 MI S Unadilla Forks
RouteCounty Highway 0
CountyOtsego County
StateNew York
Coordinates42.82382, -75.23546
Functional classRural Major Collector

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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating74 US tons
Inventory rating19.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length31 ft (9.4 m)
Longest span27 ft (8.2 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic514 (2017)
Projected traffic536 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5.6 mi (9 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 proposedDeck replacement with only incidental widening
Estimated improvement cost$575,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 18 over Campbell Brook built?

It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1950.

What condition is County Road 18 over Campbell 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 April 2023.

How much traffic does County Road 18 over Campbell Brook carry?

About 514 vehicles per day (2017 count), of which roughly 5% are trucks.

How long is County Road 18 over Campbell Brook?

The structure is 31 ft (9.4 m) long with a longest span of 27 ft (8.2 m) and a deck 32 ft wide.

Who owns County Road 18 over Campbell Brook?

It is owned by the County Highway Agency.