US Bridges

Head of Pond Road over Long Island-Mk Br

FairPosted for load

Suffolk County, New York · At Water Mill · Structure no. 000000002261150

Built
1913
112 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
101 ft
3 main spans
Daily traffic
878
1995 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Head of Pond Road over Long Island-Mk Br is a steel stringer/multi-beam or girder carrying Head of Pond Road over Long Island-Mk Br in Suffolk County, New York. It was built in 1913, so it is 112 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 878 vehicles a day, roughly 10% of them trucks, projected to reach 1,229 by 2015. The structure is 101 ft (30.8 m) long and 26 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesHead of Pond Road
CrossesLong Island-Mk Br
LocationAt Water Mill
CountySuffolk County
StateNew York
Coordinates40.90708, -72.36309
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating67 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length101 ft (30.8 m)
Longest span33 ft (10.1 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic878 (1995)
Projected traffic1,229 by 2015
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Head of Pond Road over Long Island-Mk Br built?

It was built in 1913, making it 112 years old in 2025.

What condition is Head of Pond Road over Long Island-Mk Br 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 Head of Pond Road over Long Island-Mk Br carry?

About 878 vehicles per day (1995 count), of which roughly 10% are trucks.

How long is Head of Pond Road over Long Island-Mk Br?

The structure is 101 ft (30.8 m) long with a longest span of 33 ft (10.1 m) and a deck 26 ft wide.

Who owns Head of Pond Road over Long Island-Mk Br?

It is owned by the Town or Township Highway Agency.