US Bridges

RTE 30 over Lake Duane Inlet

Fair

Franklin County, New York · 3 MI N JCT SH 30 & C R 26 · Structure no. 000000001072350

Built
1962
63 years old
Condition
Fair
inspected May 2023
Type
Culvert
Steel
Length
37 ft
2 main spans
Daily traffic
1,357
2021 count
Owner
State
State Highway Agency

About this bridge

RTE 30 over Lake Duane Inlet is a steel culvert carrying RTE 30 over Lake Duane Inlet in Franklin County, New York. It was built in 1962, so it is 63 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 1,357 vehicles a day, roughly 10% of them trucks, projected to reach 1,365 by 2041. The structure is 37 ft (11.3 m) long. If it were closed, the detour would be 41.6 mi (67 km).

Location

Open in Google Maps
CarriesRTE 30
CrossesLake Duane Inlet
Location3 MI N JCT SH 30 & C R 26
RouteState Highway 30
CountyFranklin County
StateNew York
Coordinates44.69791, -74.31574
Functional classRural 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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
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
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.3 US tons
Inventory rating21.6 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length37 ft (11.3 m)
Longest span16 ft (4.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,357 (2021)
Projected traffic1,365 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed41.6 mi (67 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 proposedDeck replacement with only incidental widening
Estimated improvement cost$497,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 30 over Lake Duane Inlet built?

It was built in 1962, making it 63 years old in 2025.

What condition is RTE 30 over Lake Duane 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 May 2023.

How much traffic does RTE 30 over Lake Duane Inlet carry?

About 1,357 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is RTE 30 over Lake Duane Inlet?

The structure is 37 ft (11.3 m) long with a longest span of 16 ft (4.9 m).

Who owns RTE 30 over Lake Duane Inlet?

It is owned by the State Highway Agency.