US Bridges

RTE 20 over Callahan Brook

Fair

Madison County, New York · 41MI W JCT Rts 46+20 · Structure no. 000000001015810

Built
1948
77 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete
Length
28 ft
1 main span
Daily traffic
3,963
2020 count
Owner
State
State Highway Agency

About this bridge

RTE 20 over Callahan Brook is a concrete slab carrying RTE 20 over Callahan Brook in Madison County, New York. It was built in 1948, so it is 77 years old, older 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 6 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 3,963 vehicles a day, roughly 14% of them trucks, projected to reach 4,274 by 2041. The structure is 28 ft (8.5 m) long and 66 ft wide. If it were closed, the detour would be 37.9 mi (61 km).

Location

Open in Google Maps
CarriesRTE 20
CrossesCallahan Brook
Location41MI W JCT Rts 46+20
RouteU.S. Route 20
CountyMadison County
StateNew York
Coordinates42.89938, -75.65214
Functional classRural Principal Arterial - Other

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating74 US tons
Inventory rating44 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length28 ft (8.5 m)
Longest span26 ft (7.9 m)
Deck width66 ft (20.1 m)
Roadway width63 ft (19.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,963 (2020)
Projected traffic4,274 by 2041
Trucks14%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.9 mi (61 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$1.6 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 20 over Callahan Brook built?

It was built in 1948, making it 77 years old in 2025.

What condition is RTE 20 over Callahan 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 2023.

How much traffic does RTE 20 over Callahan Brook carry?

About 3,963 vehicles per day (2020 count), of which roughly 14% are trucks.

How long is RTE 20 over Callahan Brook?

The structure is 28 ft (8.5 m) long with a longest span of 26 ft (7.9 m) and a deck 66 ft wide.

Who owns RTE 20 over Callahan Brook?

It is owned by the State Highway Agency.