US Bridges

Butternut Ridge R over Grannis Brook

Fair

St. Lawrence County, New York · 2 MI N of Pierrepont · Structure no. 000000003341500

Built
1929
96 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
41 ft
1 main span
Daily traffic
202
2015 count
Owner
County
County Highway Agency

About this bridge

Butternut Ridge R over Grannis Brook is a steel stringer/multi-beam or girder carrying Butternut Ridge R over Grannis Brook in St. Lawrence County, New York. It was built in 1929, so it is 96 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 202 vehicles a day, roughly 3% of them trucks, projected to reach 283 by 2035. The structure is 41 ft (12.5 m) long and 23 ft wide. If it were closed, the detour would be 7.5 mi (12 km).

Location

Open in Google Maps
CarriesButternut Ridge R
CrossesGrannis Brook
Location2 MI N of Pierrepont
CountySt. Lawrence County
StateNew York
Coordinates44.56898, -75.02339
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 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; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be 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 rating87 US tons
Inventory rating52 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length41 ft (12.5 m)
Longest span38 ft (11.5 m)
Deck width23 ft (7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic202 (2015)
Projected traffic283 by 2035
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed7.5 mi (12 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$499,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Butternut Ridge R over Grannis Brook built?

It was built in 1929, making it 96 years old in 2025.

What condition is Butternut Ridge R over Grannis Brook 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 Butternut Ridge R over Grannis Brook carry?

About 202 vehicles per day (2015 count), of which roughly 3% are trucks.

How long is Butternut Ridge R over Grannis Brook?

The structure is 41 ft (12.5 m) long with a longest span of 38 ft (11.5 m) and a deck 23 ft wide.

Who owns Butternut Ridge R over Grannis Brook?

It is owned by the County Highway Agency.