US Bridges

RTE 420 over Squeak Brook

Fair

St. Lawrence County, New York · 3.3 MI NW JCT Rts 420 +11 · Structure no. 000000001048250

Built
1944
81 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
2,820
2014 count
Owner
State
State Highway Agency

About this bridge

RTE 420 over Squeak Brook is a concrete culvert carrying RTE 420 over Squeak Brook in St. Lawrence County, New York. It was built in 1944, so it is 81 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 2,820 vehicles a day, roughly 6% of them trucks, projected to reach 2,941 by 2041. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesRTE 420
CrossesSqueak Brook
Location3.3 MI NW JCT Rts 420 +11
RouteState Highway 420
CountySt. Lawrence County
StateNew York
Coordinates44.83154, -74.82916
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating88 US tons
Inventory rating52 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length24 ft (7.3 m)
Longest span23 ft (7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,820 (2014)
Projected traffic2,941 by 2041
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$605,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 420 over Squeak Brook built?

It was built in 1944, making it 81 years old in 2025.

What condition is RTE 420 over Squeak 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 RTE 420 over Squeak Brook carry?

About 2,820 vehicles per day (2014 count), of which roughly 6% are trucks.

How long is RTE 420 over Squeak Brook?

The structure is 24 ft (7.3 m) long with a longest span of 23 ft (7 m).

Who owns RTE 420 over Squeak Brook?

It is owned by the State Highway Agency.