US Bridges

C3024 over Mill Brook

Fair

Franklin County, Vermont · 0.1 MI to JCT C3 TH 2 · Structure no. 100604002306041

Built
1978
47 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete
Length
25 ft
1 main span
Daily traffic
200
2019 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

C3024 over Mill Brook is a concrete slab carrying C3024 over Mill Brook in Franklin County, Vermont. It was built in 1978, so it is 47 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 200 vehicles a day, roughly 2% of them trucks, projected to reach 210 by 2029. The structure is 25 ft (7.6 m) long and 21 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesC3024
CrossesMill Brook
Location0.1 MI to JCT C3 TH 2
CountyFranklin County
StateVermont
Coordinates44.66812, -73.00757
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating99 US tons
Inventory rating75 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length25 ft (7.6 m)
Longest span21 ft (6.4 m)
Deck width21 ft (6.5 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2019)
Projected traffic210 by 2029
Trucks2%
Lanes on structure2
Traffic directionTwo-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 statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$237,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was C3024 over Mill Brook built?

It was built in 1978, making it 47 years old in 2025.

What condition is C3024 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 August 2024.

How much traffic does C3024 over Mill Brook carry?

About 200 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is C3024 over Mill Brook?

The structure is 25 ft (7.6 m) long with a longest span of 21 ft (6.4 m) and a deck 21 ft wide.

Who owns C3024 over Mill Brook?

It is owned by the Town or Township Highway Agency.