US Bridges

RTE 304 over Lake Deforest Inlet

Fair

Rockland County, New York · 1.4 MI S JCT Rts 304+9W · Structure no. 000000001045420

Built
1963
62 years old, rebuilt 1994
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
103 ft
1 main span
Daily traffic
12,112
2021 count
Owner
State
State Highway Agency

About this bridge

RTE 304 over Lake Deforest Inlet is a steel stringer/multi-beam or girder carrying RTE 304 over Lake Deforest Inlet in Rockland County, New York. It was built in 1963 and reconstructed in 1994, so it is 62 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 12,112 vehicles a day, roughly 3% of them trucks, projected to reach 12,168 by 2041. The structure is 103 ft (31.4 m) long and 37 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesRTE 304
CrossesLake Deforest Inlet
Location1.4 MI S JCT Rts 304+9W
RouteState Highway 304
CountyRockland County
StateNew York
Coordinates41.16316, -73.9681
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionSeptember 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.1 US tons
Inventory rating46 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length103 ft (31.4 m)
Longest span98 ft (29.8 m)
Deck width37 ft (11.4 m)
Roadway width35 ft (10.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,112 (2021)
Projected traffic12,168 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$2.9 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 304 over Lake Deforest Inlet built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1994.

What condition is RTE 304 over Lake Deforest Inlet 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 RTE 304 over Lake Deforest Inlet carry?

About 12,112 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is RTE 304 over Lake Deforest Inlet?

The structure is 103 ft (31.4 m) long with a longest span of 98 ft (29.8 m) and a deck 37 ft wide.

Who owns RTE 304 over Lake Deforest Inlet?

It is owned by the State Highway Agency.