US Bridges

C3006 over Twenty Mile Stream

Good

Windsor County, Vermont · 0.4 MI to JCT W VT131 · Structure no. 101406004314061

Built
1974
51 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
46 ft
1 main span
Daily traffic
250
2019 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

C3006 over Twenty Mile Stream is a steel stringer/multi-beam or girder carrying C3006 over Twenty Mile Stream in Windsor County, Vermont. It was built in 1974, so it is 51 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 250 vehicles a day, roughly 2% of them trucks, projected to reach 263 by 2029. The structure is 46 ft (14 m) long and 25 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesC3006
CrossesTwenty Mile Stream
Location0.4 MI to JCT W VT131
StateVermont
Coordinates43.39398, -72.6003
Functional classRural Local

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 protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating73 US tons
Inventory rating44 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length46 ft (14 m)
Longest span43 ft (13.1 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2019)
Projected traffic263 by 2029
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was C3006 over Twenty Mile Stream built?

It was built in 1974, making it 51 years old in 2025.

What condition is C3006 over Twenty Mile Stream 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 October 2023.

How much traffic does C3006 over Twenty Mile Stream carry?

About 250 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is C3006 over Twenty Mile Stream?

The structure is 46 ft (14 m) long with a longest span of 43 ft (13.1 m) and a deck 25 ft wide.

Who owns C3006 over Twenty Mile Stream?

It is owned by the Town or Township Highway Agency.