US Bridges

Holbrook RD over Railroad Ave LIRR Main

Fair

Suffolk County, New York · 1.9 MI West of Holtsville · Structure no. 000000003364400

Built
1973
52 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
238 ft
4 main spans
Daily traffic
20,614
2021 count
Owner
County
County Highway Agency

About this bridge

Holbrook RD over Railroad Ave LIRR Main is a steel stringer/multi-beam or girder carrying Holbrook RD over Railroad Ave LIRR Main in Suffolk County, New York. It was built in 1973, so it is 52 years old, younger 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 20,614 vehicles a day, roughly 3% of them trucks, projected to reach 25,041 by 2041. The structure is 238 ft (72.5 m) long and 88 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesHolbrook RD
CrossesRailroad Ave LIRR Main
Location1.9 MI West of Holtsville
RouteCounty Highway 0
CountySuffolk County
StateNew York
Coordinates40.81069, -73.07635
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.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82 US tons
Inventory rating49.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length238 ft (72.5 m)
Longest span64 ft (19.5 m)
Deck width88 ft (26.8 m)
Roadway width78 ft (23.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,614 (2021)
Projected traffic25,041 by 2041
Trucks3%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
Detour if closed0.6 mi (1 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$14.2 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Holbrook RD over Railroad Ave LIRR Main built?

It was built in 1973, making it 52 years old in 2025.

What condition is Holbrook RD over Railroad Ave LIRR Main 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 August 2024.

How much traffic does Holbrook RD over Railroad Ave LIRR Main carry?

About 20,614 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Holbrook RD over Railroad Ave LIRR Main?

The structure is 238 ft (72.5 m) long with a longest span of 64 ft (19.5 m) and a deck 88 ft wide.

Who owns Holbrook RD over Railroad Ave LIRR Main?

It is owned by the County Highway Agency.