US Bridges

Horse Block Road over 495I495I07041250 RTE I4

Fair

Suffolk County, New York · 1.1 MI E Rts 112+495 · Structure no. 000000001064139

Built
1970
55 years old, rebuilt 2013
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
425 ft
5 main spans
Daily traffic
19,819
2016 count
Owner
State
State Highway Agency

About this bridge

Horse Block Road over 495I495I07041250 RTE I4 is a steel stringer/multi-beam or girder carrying Horse Block Road over 495I495I07041250 RTE I4 in Suffolk County, New York. It was built in 1970 and reconstructed in 2013, so it is 55 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 19,819 vehicles a day, roughly 4% of them trucks, projected to reach 24,076 by 2041. The structure is 425 ft (129.5 m) long and 76 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesHorse Block Road
Crosses495I495I07041250 RTE I4
Location1.1 MI E Rts 112+495
RouteCounty Highway 0
CountySuffolk County
StateNew York
Coordinates40.82232, -72.97531
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.9 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length425 ft (129.5 m)
Longest span110 ft (33.5 m)
Deck width76 ft (23.2 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,819 (2016)
Projected traffic24,076 by 2041
Trucks4%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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$21.6 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Horse Block Road over 495I495I07041250 RTE I4 built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2013.

What condition is Horse Block Road over 495I495I07041250 RTE I4 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 2023.

How much traffic does Horse Block Road over 495I495I07041250 RTE I4 carry?

About 19,819 vehicles per day (2016 count), of which roughly 4% are trucks.

How long is Horse Block Road over 495I495I07041250 RTE I4?

The structure is 425 ft (129.5 m) long with a longest span of 110 ft (33.5 m) and a deck 76 ft wide.

Who owns Horse Block Road over 495I495I07041250 RTE I4?

It is owned by the State Highway Agency.