US Bridges

C3021 over S0. Br. Middlebury Riv

Good

Addison County, Vermont · 0.10 MI S of VT125 · Structure no. 100116001101161

Built
2001
24 years old
Condition
Good
inspected August 2024
Type
Slab
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
50
2019 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

C3021 over S0. Br. Middlebury Riv is a prestressed concrete slab carrying C3021 over S0. Br. Middlebury Riv in Addison County, Vermont. It was built in 2001, so it is 24 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 50 vehicles a day, roughly 2% of them trucks, projected to reach 53 by 2029. The structure is 30 ft (9.1 m) long and 20 ft wide.

Location

Open in Google Maps
CarriesC3021
CrossesS0. Br. Middlebury Riv
Location0.10 MI S of VT125
CountyAddison County
StateVermont
Coordinates43.947, -72.98538
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
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 alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length30 ft (9.1 m)
Longest span28 ft (8.5 m)
Deck width20 ft (6.1 m)
Roadway width18 ft (5.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2019)
Projected traffic53 by 2029
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 C3021 over S0. Br. Middlebury Riv built?

It was built in 2001, making it 24 years old in 2025.

What condition is C3021 over S0. Br. Middlebury Riv 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 August 2024.

How much traffic does C3021 over S0. Br. Middlebury Riv carry?

About 50 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is C3021 over S0. Br. Middlebury Riv?

The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.5 m) and a deck 20 ft wide.

Who owns C3021 over S0. Br. Middlebury Riv?

It is owned by the Town or Township Highway Agency.