US Bridges

RTE 97 over Mill Brook

Fair

Sullivan County, New York · 7.4 MI SE JCT SH 97 & SH · Structure no. 000000001035350

Built
1938
87 years old
Condition
Fair
inspected May 2024
Type
Frame
Concrete
Length
34 ft
1 main span
Daily traffic
1,162
2016 count
Owner
State
State Highway Agency

About this bridge

RTE 97 over Mill Brook is a concrete frame carrying RTE 97 over Mill Brook in Sullivan County, New York. It was built in 1938, 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 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 1,162 vehicles a day, roughly 5% of them trucks, projected to reach 1,212 by 2041. The structure is 34 ft (10.4 m) long and 30 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesRTE 97
CrossesMill Brook
Location7.4 MI SE JCT SH 97 & SH
RouteState Highway 97
CountySullivan County
StateNew York
Coordinates41.43898, -74.82153
Functional classRural Major Collector

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 adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating69 US tons
Inventory rating41 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length34 ft (10.4 m)
Longest span30 ft (9.1 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,162 (2016)
Projected traffic1,212 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 97 over Mill Brook built?

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

What condition is RTE 97 over Mill 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 97 over Mill Brook carry?

About 1,162 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is RTE 97 over Mill Brook?

The structure is 34 ft (10.4 m) long with a longest span of 30 ft (9.1 m) and a deck 30 ft wide.

Who owns RTE 97 over Mill Brook?

It is owned by the State Highway Agency.