US Bridges

C3006 over Allen Brook

Good

Chittenden County, Vermont · 1.0 MI to JCT W VT2A · Structure no. 100417001404171

Built
1996
29 years old
Condition
Good
inspected September 2023
Type
Slab
Concrete
Length
26 ft
1 main span
Daily traffic
810
2019 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

C3006 over Allen Brook is a concrete slab carrying C3006 over Allen Brook in Chittenden County, Vermont. It was built in 1996, so it is 29 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 810 vehicles a day, roughly 2% of them trucks, projected to reach 851 by 2029. The structure is 26 ft (7.9 m) long and 28 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesC3006
CrossesAllen Brook
Location1.0 MI to JCT W VT2A
CountyChittenden County
StateVermont
Coordinates44.47284, -73.13332
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable 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 alignment8: Equal to present desirable criteria
Operating rating97 US tons
Inventory rating58 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length26 ft (7.9 m)
Longest span24 ft (7.3 m)
Deck width28 ft (8.6 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic810 (2019)
Projected traffic851 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

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 Allen Brook built?

It was built in 1996, making it 29 years old in 2025.

What condition is C3006 over Allen Brook 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 September 2023.

How much traffic does C3006 over Allen Brook carry?

About 810 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is C3006 over Allen Brook?

The structure is 26 ft (7.9 m) long with a longest span of 24 ft (7.3 m) and a deck 28 ft wide.

Who owns C3006 over Allen Brook?

It is owned by the Town or Township Highway Agency.