US Bridges

County Road 25 over Cobb Creek

Poor

Lewis County, New York · 4.5 MI NE of New Boston · Structure no. 000000003340160

Built
1968
57 years old, rebuilt 2017
Condition
Poor
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
38 ft
1 main span
Daily traffic
73
2019 count
Owner
County
County Highway Agency

About this bridge

County Road 25 over Cobb Creek is a steel stringer/multi-beam or girder carrying County Road 25 over Cobb Creek in Lewis County, New York. It was built in 1968 and reconstructed in 2017, so it is 57 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 73 vehicles a day, roughly 7% of them trucks, projected to reach 102 by 2039. The structure is 38 ft (11.6 m) long and 18 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCounty Road 25
CrossesCobb Creek
Location4.5 MI NE of New Boston
RouteCounty Highway 0
CountyLewis County
StateNew York
Coordinates43.82389, -75.65315
Functional classRural Minor 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
Deck9 ExcellentNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating58 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length38 ft (11.6 m)
Longest span35 ft (10.6 m)
Deck width18 ft (5.5 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic73 (2019)
Projected traffic102 by 2039
Trucks7%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$460,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 25 over Cobb Creek built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 2017.

What condition is County Road 25 over Cobb Creek 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 September 2024.

How much traffic does County Road 25 over Cobb Creek carry?

About 73 vehicles per day (2019 count), of which roughly 7% are trucks.

How long is County Road 25 over Cobb Creek?

The structure is 38 ft (11.6 m) long with a longest span of 35 ft (10.6 m) and a deck 18 ft wide.

Who owns County Road 25 over Cobb Creek?

It is owned by the County Highway Agency.