US Bridges

C30GO over N. Br. Winooski River

Good

Washington County, Vermont · @ JCT W CL1 TH5 · Structure no. 101211001412111

Built
1984
41 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
92 ft
1 main span
Daily traffic
530
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

C30GO over N. Br. Winooski River is a steel stringer/multi-beam or girder carrying C30GO over N. Br. Winooski River in Washington County, Vermont. It was built in 1984, so it is 41 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 530 vehicles a day, roughly 2% of them trucks, projected to reach 557 by 2029. The structure is 92 ft (28 m) long and 30 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesC30GO
CrossesN. Br. Winooski River
Location@ JCT W CL1 TH5
CountyWashington County
StateVermont
Coordinates44.28674, -72.57757
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length92 ft (28 m)
Longest span88 ft (26.8 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic530 (2019)
Projected traffic557 by 2029
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was C30GO over N. Br. Winooski River built?

It was built in 1984, making it 41 years old in 2025.

What condition is C30GO over N. Br. 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 August 2023.

How much traffic does C30GO over N. Br. Winooski River carry?

About 530 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is C30GO over N. Br. Winooski River?

The structure is 92 ft (28 m) long with a longest span of 88 ft (26.8 m) and a deck 30 ft wide.

Who owns C30GO over N. Br. Winooski River?

It is owned by the City or Municipal Highway Agency.