US Bridges

County Road 47 over Miken Brook

Good

Lewis County, New York · 0.8 MI N of West Leyden · Structure no. 000000003340430

Built
1939
86 years old
Condition
Good
inspected May 2023
Type
Slab
Concrete
Length
22 ft
1 main span
Daily traffic
236
2015 count
Owner
County
County Highway Agency

About this bridge

County Road 47 over Miken Brook is a concrete slab carrying County Road 47 over Miken Brook in Lewis County, New York. It was built in 1939, so it is 86 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 236 vehicles a day, roughly 8% of them trucks, projected to reach 330 by 2035. The structure is 22 ft (6.7 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesCounty Road 47
CrossesMiken Brook
Location0.8 MI N of West Leyden
RouteCounty Highway 0
CountyLewis County
StateNew York
Coordinates43.47025, -75.46881
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
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 rating81.9 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span21 ft (6.4 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic236 (2015)
Projected traffic330 by 2035
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$366,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 47 over Miken Brook built?

It was built in 1939, making it 86 years old in 2025.

What condition is County Road 47 over Miken 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 May 2023.

How much traffic does County Road 47 over Miken Brook carry?

About 236 vehicles per day (2015 count), of which roughly 8% are trucks.

How long is County Road 47 over Miken Brook?

The structure is 22 ft (6.7 m) long with a longest span of 21 ft (6.4 m) and a deck 31 ft wide.

Who owns County Road 47 over Miken Brook?

It is owned by the County Highway Agency.