US Bridges

RTE 420 over E Br ST Regis Rvr

Good

St. Lawrence County, New York · 1.25 Miles SW of Winthrop · Structure no. 000000003341950

Built
1965
60 years old, rebuilt 1993
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
246 ft
2 main spans
Daily traffic
1,580
2015 count
Owner
State
State Highway Agency

About this bridge

RTE 420 over E Br ST Regis Rvr is a steel stringer/multi-beam or girder carrying RTE 420 over E Br ST Regis Rvr in St. Lawrence County, New York. It was built in 1965 and reconstructed in 1993, so it is 60 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 1,580 vehicles a day, roughly 10% of them trucks, projected to reach 1,648 by 2041. The structure is 246 ft (75 m) long and 31 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesRTE 420
CrossesE Br ST Regis Rvr
Location1.25 Miles SW of Winthrop
RouteState Highway 420
CountySt. Lawrence County
StateNew York
Coordinates44.7822, -74.78004
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
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 alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length246 ft (75 m)
Longest span120 ft (36.5 m)
Deck width31 ft (9.4 m)
Roadway width29 ft (8.8 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 closed0.6 mi (1 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$2.6 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

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

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1993.

What condition is RTE 420 over E Br ST Regis Rvr 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 2023.

How much traffic does RTE 420 over E 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 E Br ST Regis Rvr?

The structure is 246 ft (75 m) long with a longest span of 120 ft (36.5 m) and a deck 31 ft wide.

Who owns RTE 420 over E Br ST Regis Rvr?

It is owned by the State Highway Agency.