US Bridges

N. Williston Road over Winooski River

Good

Chittenden County, Vermont · 0.34 MI to JCT W VT117 · Structure no. 205408000804062

Built
1993
32 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
282 ft
2 main spans
Daily traffic
5,400
2016 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

N. Williston Road over Winooski River is a steel continuous stringer/multi-beam or girder carrying N. Williston Road over Winooski River in Chittenden County, Vermont. It was built in 1993, so it is 32 years old, younger than the Vermont average of 60.8 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 5,400 vehicles a day, roughly 2% of them trucks, projected to reach 5,670 by 2026. The structure is 282 ft (86 m) long and 34 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesN. Williston Road
CrossesWinooski River
Location0.34 MI to JCT W VT117
RouteCity Street NWILR
StateVermont
Coordinates44.47104, -73.04391
Functional classUrban 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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating77.1 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length282 ft (86 m)
Longest span138 ft (42.1 m)
Deck width34 ft (10.5 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,400 (2016)
Projected traffic5,670 by 2026
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$3.5 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was N. Williston Road over Winooski River built?

It was built in 1993, making it 32 years old in 2025.

What condition is N. Williston Road over Winooski 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 July 2024.

How much traffic does N. Williston Road over Winooski River carry?

About 5,400 vehicles per day (2016 count), of which roughly 2% are trucks.

How long is N. Williston Road over Winooski River?

The structure is 282 ft (86 m) long with a longest span of 138 ft (42.1 m) and a deck 34 ft wide.

Who owns N. Williston Road over Winooski River?

It is owned by the Town or Township Highway Agency.