US Bridges

RTE 23 over Mad Brook

Fair

Greene County, New York · Rt 23 0.4 MI W of Windham · Structure no. 000000001017710

Built
1938
87 years old, rebuilt 1992
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
33 ft
1 main span
Daily traffic
2,441
2019 count
Owner
State
State Highway Agency

About this bridge

RTE 23 over Mad Brook is a steel stringer/multi-beam or girder carrying RTE 23 over Mad Brook in Greene County, New York. It was built in 1938 and reconstructed in 1992, so it is 87 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 2,441 vehicles a day, roughly 10% of them trucks, projected to reach 2,603 by 2041. The structure is 33 ft (10.1 m) long and 60 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesRTE 23
CrossesMad Brook
LocationRt 23 0.4 MI W of Windham
RouteState Highway 23
CountyGreene County
StateNew York
Coordinates42.30777, -74.24964
Functional classRural Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
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 evaluation7: Better than present minimum criteria
Deck geometry7: Better than 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 rating68 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span32 ft (9.7 m)
Deck width60 ft (18.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,441 (2019)
Projected traffic2,603 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemNo

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$1.3 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 23 over Mad Brook built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1992.

What condition is RTE 23 over Mad 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 23 over Mad Brook carry?

About 2,441 vehicles per day (2019 count), of which roughly 10% are trucks.

How long is RTE 23 over Mad Brook?

The structure is 33 ft (10.1 m) long with a longest span of 32 ft (9.7 m) and a deck 60 ft wide.

Who owns RTE 23 over Mad Brook?

It is owned by the State Highway Agency.