US Bridges

RTE 23 over Middle Brook

Fair

Delaware County, New York · 10.4 MI NW JCT SH23 &SH10 · Structure no. 000000001017610

Built
1940
85 years old, rebuilt 1984
Condition
Fair
inspected May 2024
Type
Girder and Floorbeam System
Steel
Length
96 ft
1 main span
Daily traffic
3,108
2016 count
Owner
State
State Highway Agency

About this bridge

RTE 23 over Middle Brook is a steel girder and floorbeam system carrying RTE 23 over Middle Brook in Delaware County, New York. It was built in 1940 and reconstructed in 1984, so it is 85 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 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 3,108 vehicles a day, roughly 10% of them trucks, projected to reach 3,127 by 2041. The structure is 96 ft (29.3 m) long and 35 ft wide. If it were closed, the detour would be 54.7 mi (88 km).

Location

Open in Google Maps
CarriesRTE 23
CrossesMiddle Brook
Location10.4 MI NW JCT SH23 &SH10
RouteState Highway 23
CountyDelaware County
StateNew York
Coordinates42.46926, -74.79605
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating43 US tons
Inventory rating25 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length96 ft (29.3 m)
Longest span90 ft (27.4 m)
Deck width35 ft (10.6 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,108 (2016)
Projected traffic3,127 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed54.7 mi (88 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 proposedDeck replacement with only incidental widening
Estimated improvement cost$2.3 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 23 over Middle Brook built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1984.

What condition is RTE 23 over Middle 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 May 2024.

How much traffic does RTE 23 over Middle Brook carry?

About 3,108 vehicles per day (2016 count), of which roughly 10% are trucks.

How long is RTE 23 over Middle Brook?

The structure is 96 ft (29.3 m) long with a longest span of 90 ft (27.4 m) and a deck 35 ft wide.

Who owns RTE 23 over Middle Brook?

It is owned by the State Highway Agency.