US Bridges

Dean Road over M.Br.Grasse River

Fair

St. Lawrence County, New York · 3.8 MI SE of Clare · Structure no. 000000003220990

Built
1982
43 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
56 ft
1 main span
Daily traffic
14
2015 count
Owner
County
County Highway Agency

About this bridge

Dean Road over M.Br.Grasse River is a steel stringer/multi-beam or girder carrying Dean Road over M.Br.Grasse River in St. Lawrence County, New York. It was built in 1982, so it is 43 years old, younger 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 14 vehicles a day, projected to reach 20 by 2035. The structure is 56 ft (17.1 m) long and 18 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesDean Road
CrossesM.Br.Grasse River
Location3.8 MI SE of Clare
CountySt. Lawrence County
StateNew York
Coordinates44.38014, -75.03116
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 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 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 rating44 US tons
Inventory rating26 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckOther
Main spans1
Design loadHS 20
Structure length56 ft (17.1 m)
Longest span54 ft (16.5 m)
Deck width18 ft (5.5 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14 (2015)
Projected traffic20 by 2035
Trucks0%
Lanes on structure2
Traffic directionTwo-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$508,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Dean Road over M.Br.Grasse River built?

It was built in 1982, making it 43 years old in 2025.

What condition is Dean Road over M.Br.Grasse 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 June 2023.

How much traffic does Dean Road over M.Br.Grasse River carry?

About 14 vehicles per day (2015 count).

How long is Dean Road over M.Br.Grasse River?

The structure is 56 ft (17.1 m) long with a longest span of 54 ft (16.5 m) and a deck 18 ft wide.

Who owns Dean Road over M.Br.Grasse River?

It is owned by the County Highway Agency.