US Bridges

C3003 over N. Br. Middlebury R.

Good

Addison County, Vermont · 0.3 MI to JCT C2 TH 1 · Structure no. 100116001501161

Built
1971
54 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
59 ft
1 main span
Daily traffic
100
2019 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

C3003 over N. Br. Middlebury R. is a steel stringer/multi-beam or girder carrying C3003 over N. Br. Middlebury R. in Addison County, Vermont. It was built in 1971, so it is 54 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 100 vehicles a day, roughly 2% of them trucks, projected to reach 105 by 2029. The structure is 59 ft (18 m) long and 15 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesC3003
CrossesN. Br. Middlebury R.
Location0.3 MI to JCT C2 TH 1
CountyAddison County
StateVermont
Coordinates43.98865, -73.03989
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
Deck7 GoodSome minor problems.
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.1 US tons
Inventory rating35.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length59 ft (18 m)
Longest span57 ft (17.4 m)
Deck width15 ft (4.5 m)
Roadway width13 ft (3.9 m)
Vertical clearance over deckUnrestricted

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 closed6.2 mi (10 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$352,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was C3003 over N. Br. Middlebury R. built?

It was built in 1971, making it 54 years old in 2025.

What condition is C3003 over N. Br. Middlebury R. 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 C3003 over N. Br. Middlebury R. carry?

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

How long is C3003 over N. Br. Middlebury R.?

The structure is 59 ft (18 m) long with a longest span of 57 ft (17.4 m) and a deck 15 ft wide.

Who owns C3003 over N. Br. Middlebury R.?

It is owned by the Town or Township Highway Agency.