US Bridges

Mill Road over Watts Brook

Fair

Nassau County, New York · 0.2 Mi. S JCT RTE 27&MILL · Structure no. 000000003300060

Built
1964
61 years old
Condition
Fair
inspected April 2024
Type
Tee Beam
Concrete
Length
28 ft
1 main span
Daily traffic
23,078
2019 count
Owner
County
County Highway Agency

About this bridge

Mill Road over Watts Brook is a concrete tee beam carrying Mill Road over Watts Brook in Nassau County, New York. It was built in 1964, so it is 61 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 23,078 vehicles a day, roughly 2% of them trucks, projected to reach 28,035 by 2041. The structure is 28 ft (8.5 m) long and 85 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesMill Road
CrossesWatts Brook
Location0.2 Mi. S JCT RTE 27&MILL
CountyNassau County
StateNew York
Coordinates40.65858, -73.70961
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 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 geometry9: Superior to present desirable criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span26 ft (7.9 m)
Deck width85 ft (25.8 m)
Roadway width69 ft (20.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,078 (2019)
Projected traffic28,035 by 2041
Trucks2%
Lanes on structure4
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 statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$2.1 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mill Road over Watts Brook built?

It was built in 1964, making it 61 years old in 2025.

What condition is Mill Road over Watts 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 Watts Brook carry?

About 23,078 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is Mill Road over Watts Brook?

The structure is 28 ft (8.5 m) long with a longest span of 26 ft (7.9 m) and a deck 85 ft wide.

Who owns Mill Road over Watts Brook?

It is owned by the County Highway Agency.