US Bridges

Keenan Road over Hunkins Marsh

Poor

St. Lawrence County, New York · 3 Miles East of Helena · Structure no. 000000002220800

Built
1902
123 years old
Condition
Poor
inspected June 2024
Type
Arch - Deck
Steel
Length
26 ft
1 main span
Daily traffic
68
2016 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Keenan Road over Hunkins Marsh is a steel arch - deck carrying Keenan Road over Hunkins Marsh in St. Lawrence County, New York. It was built in 1902, so it is 123 years old, older than the New York average of 53 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 68 vehicles a day, roughly 5% of them trucks, projected to reach 95 by 2036. The structure is 26 ft (7.9 m) long and 23 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesKeenan Road
CrossesHunkins Marsh
Location3 Miles East of Helena
Coordinates44.92437, -74.67673
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.7 US tons
Inventory rating10.4 US tons

Structure

Structure typeArch - Deck
MaterialSteel
DeckNot applicable
Main spans1
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span25 ft (7.6 m)
Deck width23 ft (6.9 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic68 (2016)
Projected traffic95 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedDeck replacement with only incidental widening
Estimated improvement cost$176,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Keenan Road over Hunkins Marsh built?

It was built in 1902, making it 123 years old in 2025.

What condition is Keenan Road over Hunkins Marsh in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does Keenan Road over Hunkins Marsh carry?

About 68 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Keenan Road over Hunkins Marsh?

The structure is 26 ft (7.9 m) long with a longest span of 25 ft (7.6 m) and a deck 23 ft wide.

Who owns Keenan Road over Hunkins Marsh?

It is owned by the Town or Township Highway Agency.