US Bridges

County Road 18 over Brimmer Brook

Fair

Allegany County, New York · .8 MI S of RT417 on CR 18 · Structure no. 000000003359600

Built
1983
42 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
45 ft
1 main span
Daily traffic
721
2020 count
Owner
County
County Highway Agency

About this bridge

County Road 18 over Brimmer Brook is a steel stringer/multi-beam or girder carrying County Road 18 over Brimmer Brook in Allegany County, New York. It was built in 1983, so it is 42 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 721 vehicles a day, roughly 5% of them trucks, projected to reach 1,009 by 2040. The structure is 45 ft (13.7 m) long and 28 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesCounty Road 18
CrossesBrimmer Brook
Location.8 MI S of RT417 on CR 18
RouteCounty Highway 0
CountyAllegany County
StateNew York
Coordinates42.10441, -78.01393
Functional classRural Minor 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length45 ft (13.7 m)
Longest span43 ft (13.1 m)
Deck width28 ft (8.5 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic721 (2020)
Projected traffic1,009 by 2040
Trucks5%
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

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$868,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 18 over Brimmer Brook built?

It was built in 1983, making it 42 years old in 2025.

What condition is County Road 18 over Brimmer 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 July 2024.

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

About 721 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is County Road 18 over Brimmer Brook?

The structure is 45 ft (13.7 m) long with a longest span of 43 ft (13.1 m) and a deck 28 ft wide.

Who owns County Road 18 over Brimmer Brook?

It is owned by the County Highway Agency.