US Bridges

C3006 over Mill Brook

Good

Windsor County, Vermont · 0.3 MI to JCT W CL3 TH16 · Structure no. 101423002414231

Built
1983
42 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
62 ft
1 main span
Daily traffic
320
2019 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

C3006 over Mill Brook is a steel stringer/multi-beam or girder carrying C3006 over Mill Brook in Windsor County, Vermont. It was built in 1983, so it is 42 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 320 vehicles a day, roughly 2% of them trucks, projected to reach 336 by 2029. The structure is 62 ft (18.9 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesC3006
CrossesMill Brook
Location0.3 MI to JCT W CL3 TH16
StateVermont
Coordinates43.46216, -72.42364
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99 US tons
Inventory rating63.1 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length62 ft (18.9 m)
Longest span59 ft (18 m)
Deck width25 ft (7.7 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic320 (2019)
Projected traffic336 by 2029
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Mill Brook built?

It was built in 1983, making it 42 years old in 2025.

What condition is C3006 over Mill 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 Mill Brook carry?

About 320 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is C3006 over Mill Brook?

The structure is 62 ft (18.9 m) long with a longest span of 59 ft (18 m) and a deck 25 ft wide.

Who owns C3006 over Mill Brook?

It is owned by the Town or Township Highway Agency.