US Bridges

C3007 over Mill Brook

FairPosted for load

Windsor County, Vermont · @ JCT W CL3 TH6 · Structure no. 101423002314231

Built
1947
78 years old, rebuilt 1997
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
54 ft
1 main span
Daily traffic
150
2019 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

C3007 over Mill Brook is a steel stringer/multi-beam or girder carrying C3007 over Mill Brook in Windsor County, Vermont. It was built in 1947 and reconstructed in 1997, so it is 78 years old, older 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. Its operating status is: posted for load restriction.

It carries about 150 vehicles a day, roughly 2% of them trucks, projected to reach 158 by 2029. The structure is 54 ft (16.5 m) long and 20 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesC3007
CrossesMill Brook
Location@ JCT W CL3 TH6
CountyWindsor County
StateVermont
Coordinates43.46929, -72.42912
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29 US tons
Inventory rating17 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length54 ft (16.5 m)
Longest span51 ft (15.5 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2019)
Projected traffic158 by 2029
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$428,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was C3007 over Mill Brook built?

It was built in 1947, making it 78 years old in 2025. It was reconstructed in 1997.

What condition is C3007 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 C3007 over Mill Brook carry?

About 150 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is C3007 over Mill Brook?

The structure is 54 ft (16.5 m) long with a longest span of 51 ft (15.5 m) and a deck 20 ft wide.

Who owns C3007 over Mill Brook?

It is owned by the Town or Township Highway Agency.