US Bridges

RTE 68 over Grannis Brook

Good

St. Lawrence County, New York · 2.0 MI SE JCT Rts 68 + 11 · Structure no. 000000001029320

Built
1959
66 years old, rebuilt 2012
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
50 ft
1 main span
Daily traffic
1,680
2020 count
Owner
State
State Highway Agency

About this bridge

RTE 68 over Grannis Brook is a steel stringer/multi-beam or girder carrying RTE 68 over Grannis Brook in St. Lawrence County, New York. It was built in 1959 and reconstructed in 2012, so it is 66 years old, older than the New York average of 53 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,680 vehicles a day, roughly 6% of them trucks, projected to reach 1,690 by 2041. The structure is 50 ft (15.2 m) long and 33 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesRTE 68
CrossesGrannis Brook
Location2.0 MI SE JCT Rts 68 + 11
RouteState Highway 68
CountySt. Lawrence County
StateNew York
Coordinates44.58168, -75.11742
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation7: Better than present minimum criteria
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 alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating93.9 US tons
Inventory rating72.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span48 ft (14.6 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,680 (2020)
Projected traffic1,690 by 2041
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$1.3 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 68 over Grannis Brook built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2012.

What condition is RTE 68 over Grannis Brook in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.

How much traffic does RTE 68 over Grannis Brook carry?

About 1,680 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is RTE 68 over Grannis Brook?

The structure is 50 ft (15.2 m) long with a longest span of 48 ft (14.6 m) and a deck 33 ft wide.

Who owns RTE 68 over Grannis Brook?

It is owned by the State Highway Agency.