US Bridges

Coffin Mills Road over Little River

Good

St. Lawrence County, New York · 2 MI SW of Oswegatchie · Structure no. 000000003221130

Built
1994
31 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
66 ft
1 main span
Daily traffic
18
2015 count
Owner
County
County Highway Agency

About this bridge

Coffin Mills Road over Little River is a wood or timber stringer/multi-beam or girder carrying Coffin Mills Road over Little River in St. Lawrence County, New York. It was built in 1994, so it is 31 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 18 vehicles a day, projected to reach 25 by 2035. The structure is 66 ft (20.1 m) long and 18 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesCoffin Mills Road
CrossesLittle River
Location2 MI SW of Oswegatchie
Coordinates44.14883, -75.10559
Functional classRural Local

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating64 US tons
Inventory rating41 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length66 ft (20.1 m)
Longest span64 ft (19.5 m)
Deck width18 ft (5.5 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18 (2015)
Projected traffic25 by 2035
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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$610,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Coffin Mills Road over Little River built?

It was built in 1994, making it 31 years old in 2025.

What condition is Coffin Mills Road over Little River 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 August 2024.

How much traffic does Coffin Mills Road over Little River carry?

About 18 vehicles per day (2015 count).

How long is Coffin Mills Road over Little River?

The structure is 66 ft (20.1 m) long with a longest span of 64 ft (19.5 m) and a deck 18 ft wide.

Who owns Coffin Mills Road over Little River?

It is owned by the County Highway Agency.