US Bridges

Christian Ave over Mill Pond

Fair

Suffolk County, New York · At Setauket · Structure no. 000000002261560

Built
1953
72 years old
Condition
Fair
inspected March 2024
Type
Culvert
Steel
Length
22 ft
3 main spans
Daily traffic
1,768
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Christian Ave over Mill Pond is a steel culvert carrying Christian Ave over Mill Pond in Suffolk County, New York. It was built in 1953, so it is 72 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 1,768 vehicles a day, roughly 6% of them trucks, projected to reach 2,475 by 2041. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 0.6 mi (1 km).

CarriesChristian Ave
CrossesMill Pond
LocationAt Setauket
Coordinates40.94169, -73.11721
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating78.2 US tons
Inventory rating21.6 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,768 (2021)
Projected traffic2,475 by 2041
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 statusHistorical significance not determinable at this time
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$302,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Christian Ave over Mill Pond built?

It was built in 1953, making it 72 years old in 2025.

What condition is Christian Ave over Mill Pond 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 March 2024.

How much traffic does Christian Ave over Mill Pond carry?

About 1,768 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is Christian Ave over Mill Pond?

The structure is 22 ft (6.7 m) long with a longest span of 6 ft (1.8 m).

Who owns Christian Ave over Mill Pond?

It is owned by the Town or Township Highway Agency.