US Bridges

Old Mill Road over Hackensack River

Fair

Rockland County, New York · 2.5 MI NW of Nyack · Structure no. 000000003345770

Built
1950
75 years old, rebuilt 1990
Condition
Fair
inspected November 2023
Type
Girder and Floorbeam System
Steel
Length
54 ft
1 main span
Daily traffic
2,866
2020 count
Owner
County
County Highway Agency

About this bridge

Old Mill Road over Hackensack River is a steel girder and floorbeam system carrying Old Mill Road over Hackensack River in Rockland County, New York. It was built in 1950 and reconstructed in 1990, so it is 75 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 2,866 vehicles a day, roughly 3% of them trucks, projected to reach 3,546 by 2041. The structure is 54 ft (16.5 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesOld Mill Road
CrossesHackensack River
Location2.5 MI NW of Nyack
CountyRockland County
StateNew York
Coordinates41.10546, -73.96673
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length54 ft (16.5 m)
Longest span52 ft (15.8 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,866 (2020)
Projected traffic3,546 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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$1.8 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Old Mill Road over Hackensack River built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1990.

What condition is Old Mill Road over Hackensack River 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 November 2023.

How much traffic does Old Mill Road over Hackensack River carry?

About 2,866 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is Old Mill Road over Hackensack River?

The structure is 54 ft (16.5 m) long with a longest span of 52 ft (15.8 m) and a deck 29 ft wide.

Who owns Old Mill Road over Hackensack River?

It is owned by the County Highway Agency.