US Bridges

Mill Road over Fosters Brook

Fair

Nassau County, New York · 1.7 MI S Valley Str · Structure no. 000000003300170

Built
1951
74 years old, rebuilt 2006
Condition
Fair
inspected April 2024
Type
Slab
Concrete Continuous
Length
51 ft
5 main spans
Daily traffic
18,895
2019 count
Owner
County
County Highway Agency

About this bridge

Mill Road over Fosters Brook is a concrete continuous slab carrying Mill Road over Fosters Brook in Nassau County, New York. It was built in 1951 and reconstructed in 2006, so it is 74 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 18,895 vehicles a day, roughly 2% of them trucks, projected to reach 22,953 by 2041. The structure is 51 ft (15.5 m) long and 82 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesMill Road
CrossesFosters Brook
Location1.7 MI S Valley Str
RouteCounty Highway 0
CountyNassau County
StateNew York
Coordinates40.6519, -73.70882
Functional classUrban 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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26.8 US tons
Inventory rating20.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckNot applicable
Main spans5
Design loadHS 20
Structure length51 ft (15.5 m)
Longest span9 ft (2.7 m)
Deck width82 ft (25.1 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,895 (2019)
Projected traffic22,953 by 2041
Trucks2%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedDeck replacement with only incidental widening
Estimated improvement cost$2.2 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mill Road over Fosters Brook built?

It was built in 1951, making it 74 years old in 2025. It was reconstructed in 2006.

What condition is Mill Road over Fosters 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 April 2024.

How much traffic does Mill Road over Fosters Brook carry?

About 18,895 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is Mill Road over Fosters Brook?

The structure is 51 ft (15.5 m) long with a longest span of 9 ft (2.7 m) and a deck 82 ft wide.

Who owns Mill Road over Fosters Brook?

It is owned by the County Highway Agency.