US Bridges

Mill Road over Black Brook

Good

Sullivan County, New York · 0.4 MI W of Forestburg · Structure no. 000000003356570

Built
2012
13 years old
Condition
Good
inspected August 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
36 ft
1 main span
Daily traffic
54
2017 count
Owner
County
County Highway Agency

About this bridge

Mill Road over Black Brook is a prestressed concrete box beam or girders - multiple carrying Mill Road over Black Brook in Sullivan County, New York. It was built in 2012, so it is 13 years old, younger than the New York average of 53 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 54 vehicles a day, roughly 14% of them trucks, projected to reach 76 by 2037. The structure is 36 ft (11 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesMill Road
CrossesBlack Brook
Location0.4 MI W of Forestburg
Coordinates41.54675, -74.75944
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating108.5 US tons
Inventory rating65 US tons

Structure

MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length36 ft (11 m)
Longest span30 ft (9.1 m)
Deck width24 ft (7.4 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic54 (2017)
Projected traffic76 by 2037
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$703,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mill Road over Black Brook built?

It was built in 2012, making it 13 years old in 2025.

What condition is Mill Road over Black Brook in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.

How much traffic does Mill Road over Black Brook carry?

About 54 vehicles per day (2017 count), of which roughly 14% are trucks.

How long is Mill Road over Black Brook?

The structure is 36 ft (11 m) long with a longest span of 30 ft (9.1 m) and a deck 24 ft wide.

Who owns Mill Road over Black Brook?

It is owned by the County Highway Agency.