US Bridges

C3030 over Mill Brook

GoodPosted for load

Windsor County, Vermont · 0.35 MI to JCT W VT44 · Structure no. 101422003314221

Built
1895
130 years old, rebuilt 2012
Condition
Good
inspected September 2023
Type
Arch - Thru
Wood or Timber
Length
46 ft
1 main span
Daily traffic
100
2019 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

C3030 over Mill Brook is a wood or timber arch - thru carrying C3030 over Mill Brook in Windsor County, Vermont. It was built in 1895 and reconstructed in 2012, so it is 130 years old, older 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. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, roughly 2% of them trucks, projected to reach 105 by 2029. The structure is 46 ft (14 m) long and 12 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesC3030
CrossesMill Brook
Location0.35 MI to JCT W VT44
CountyWindsor County
StateVermont
Coordinates43.46133, -72.49075
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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating6 US tons
Inventory rating6 US tons

Structure

Structure typeArch - Thru
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length46 ft (14 m)
Longest span40 ft (12.2 m)
Deck width12 ft (3.7 m)
Roadway width11 ft (3.4 m)
Vertical clearance over deck7 ft (2.1 m)

Traffic and service

Average daily traffic100 (2019)
Projected traffic105 by 2029
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$446,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was C3030 over Mill Brook built?

It was built in 1895, making it 130 years old in 2025. It was reconstructed in 2012.

What condition is C3030 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 C3030 over Mill Brook carry?

About 100 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is C3030 over Mill Brook?

The structure is 46 ft (14 m) long with a longest span of 40 ft (12.2 m) and a deck 12 ft wide.

Who owns C3030 over Mill Brook?

It is owned by the Town or Township Highway Agency.