US Bridges

Mill Brook Road over Mill Brook

Fair

Ulster County, New York · 2.2 MI E of Grant Mills · Structure no. 000000002224240

Built
1933
92 years old, rebuilt 2020
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
51
2019 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Mill Brook Road over Mill Brook is a steel stringer/multi-beam or girder carrying Mill Brook Road over Mill Brook in Ulster County, New York. It was built in 1933 and reconstructed in 2020, so it is 92 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 51 vehicles a day, roughly 11% of them trucks, projected to reach 71 by 2039. The structure is 40 ft (12.2 m) long and 20 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesMill Brook Road
CrossesMill Brook
Location2.2 MI E of Grant Mills
CountyUlster County
StateNew York
Coordinates42.07992, -74.6288
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating92 US tons
Inventory rating55 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span39 ft (11.9 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic51 (2019)
Projected traffic71 by 2039
Trucks11%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$485,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mill Brook Road over Mill Brook built?

It was built in 1933, making it 92 years old in 2025. It was reconstructed in 2020.

What condition is Mill Brook Road 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 September 2024.

How much traffic does Mill Brook Road over Mill Brook carry?

About 51 vehicles per day (2019 count), of which roughly 11% are trucks.

How long is Mill Brook Road over Mill Brook?

The structure is 40 ft (12.2 m) long with a longest span of 39 ft (11.9 m) and a deck 20 ft wide.

Who owns Mill Brook Road over Mill Brook?

It is owned by the Town or Township Highway Agency.