US Bridges

RTE 9 over Saranac River

Fair

Clinton County, New York · City of Plattsburgh · Structure no. 000000002219620

Built
1921
104 years old, rebuilt 2004
Condition
Fair
inspected September 2024
Type
Arch - Deck
Concrete
Length
195 ft
3 main spans
Daily traffic
6,387
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

RTE 9 over Saranac River is a concrete arch - deck carrying RTE 9 over Saranac River in Clinton County, New York. It was built in 1921 and reconstructed in 2004, so it is 104 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.

It carries about 6,387 vehicles a day, roughly 4% of them trucks, projected to reach 6,417 by 2041. The structure is 195 ft (59.4 m) long and 56 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesRTE 9
CrossesSaranac River
LocationCity of Plattsburgh
RouteU.S. Route 9
Coordinates44.69756, -73.45106
Functional classUrban Other Principal 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
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 alignment6: Equal to present minimum criteria
Operating rating42.1 US tons
Inventory rating11.4 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length195 ft (59.4 m)
Longest span51 ft (15.5 m)
Deck width56 ft (17.1 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,387 (2020)
Projected traffic6,417 by 2041
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedDeck replacement with only incidental widening
Estimated improvement cost$8.4 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 9 over Saranac River built?

It was built in 1921, making it 104 years old in 2025. It was reconstructed in 2004.

What condition is RTE 9 over Saranac River 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 September 2024.

How much traffic does RTE 9 over Saranac River carry?

About 6,387 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is RTE 9 over Saranac River?

The structure is 195 ft (59.4 m) long with a longest span of 51 ft (15.5 m) and a deck 56 ft wide.

Who owns RTE 9 over Saranac River?

It is owned by the City or Municipal Highway Agency.