US Bridges

C3006 over Mill Brook

Fair

Windsor County, Vermont · 0.55 MI to JCT W VT44 · Structure no. 101423002514231

Built
1974
51 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
77 ft
1 main span
Daily traffic
300
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 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 300 vehicles a day, roughly 2% of them trucks, projected to reach 315 by 2029. The structure is 77 ft (23.5 m) long and 20 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesC3006
CrossesMill Brook
Location0.55 MI to JCT W VT44
CountyWindsor County
StateVermont
Coordinates43.46197, -72.41958
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating99 US tons
Inventory rating57 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length77 ft (23.5 m)
Longest span75 ft (22.9 m)
Deck width20 ft (6.1 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2019)
Projected traffic315 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$592,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was C3006 over Mill Brook built?

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

What condition is C3006 over Mill Brook in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2023.

How much traffic does C3006 over Mill Brook carry?

About 300 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is C3006 over Mill Brook?

The structure is 77 ft (23.5 m) long with a longest span of 75 ft (22.9 m) and a deck 20 ft wide.

Who owns C3006 over Mill Brook?

It is owned by the Town or Township Highway Agency.