US Bridges

RTE 420 over W Br ST Regis Rvr

FairPosted for load

St. Lawrence County, New York · Located in Winthrop · Structure no. 000000003341930

Built
1949
76 years old, rebuilt 2001
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
168 ft
2 main spans
Daily traffic
1,580
2015 count
Owner
State
State Highway Agency

About this bridge

RTE 420 over W Br ST Regis Rvr is a steel stringer/multi-beam or girder carrying RTE 420 over W Br ST Regis Rvr in St. Lawrence County, New York. It was built in 1949 and reconstructed in 2001, so it is 76 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. Its operating status is: posted for other load-capacity restriction.

It carries about 1,580 vehicles a day, roughly 10% of them trucks, projected to reach 1,648 by 2041. The structure is 168 ft (51.2 m) long and 25 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesRTE 420
CrossesW Br ST Regis Rvr
LocationLocated in Winthrop
RouteState Highway 420
CountySt. Lawrence County
StateNew York
Coordinates44.79096, -74.78561
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.1 US tons
Inventory rating31.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckOpen grating
Main spans2
Design loadOther
Structure length168 ft (51.2 m)
Longest span81 ft (24.6 m)
Deck width25 ft (7.6 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,580 (2015)
Projected traffic1,648 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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$1.4 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 420 over W Br ST Regis Rvr built?

It was built in 1949, making it 76 years old in 2025. It was reconstructed in 2001.

What condition is RTE 420 over W Br ST Regis Rvr 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 420 over W Br ST Regis Rvr carry?

About 1,580 vehicles per day (2015 count), of which roughly 10% are trucks.

How long is RTE 420 over W Br ST Regis Rvr?

The structure is 168 ft (51.2 m) long with a longest span of 81 ft (24.6 m) and a deck 25 ft wide.

Who owns RTE 420 over W Br ST Regis Rvr?

It is owned by the State Highway Agency.