US Bridges

C3033 over Mill Brook

Good

Chittenden County, Vermont · 0.1 MI to JCT W CL2 TH4 · Structure no. 100409003204091

Built
1992
33 years old
Condition
Good
inspected September 2023
Type
Slab
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
138
2019 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

C3033 over Mill Brook is a prestressed concrete slab carrying C3033 over Mill Brook in Chittenden County, Vermont. It was built in 1992, so it is 33 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 138 vehicles a day, roughly 2% of them trucks, projected to reach 145 by 2029. The structure is 50 ft (15.2 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesC3033
CrossesMill Brook
Location0.1 MI to JCT W CL2 TH4
StateVermont
Coordinates44.44465, -72.97743
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.
Substructure8 Very GoodNo problems noted.
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 evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating99 US tons
Inventory rating72 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span47 ft (14.3 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic138 (2019)
Projected traffic145 by 2029
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 C3033 over Mill Brook built?

It was built in 1992, making it 33 years old in 2025.

What condition is C3033 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 C3033 over Mill Brook carry?

About 138 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is C3033 over Mill Brook?

The structure is 50 ft (15.2 m) long with a longest span of 47 ft (14.3 m) and a deck 24 ft wide.

Who owns C3033 over Mill Brook?

It is owned by the Town or Township Highway Agency.