US Bridges

C3011 over Middlebury River

FairPosted for load

Addison County, Vermont · 0.04 MI to JCT W C3 TH14 · Structure no. 100116001601161

Built
1936
89 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
44 ft
1 main span
Daily traffic
200
2019 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

C3011 over Middlebury River is a steel stringer/multi-beam or girder carrying C3011 over Middlebury River in Addison County, Vermont. It was built in 1936, so it is 89 years old, older 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. Its operating status is: posted for load restriction.

It carries about 200 vehicles a day, roughly 2% of them trucks, projected to reach 210 by 2029. The structure is 44 ft (13.4 m) long and 20 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesC3011
CrossesMiddlebury River
Location0.04 MI to JCT W C3 TH14
CountyAddison County
StateVermont
Coordinates43.97491, -73.03236
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length44 ft (13.4 m)
Longest span42 ft (12.8 m)
Deck width20 ft (6 m)
Roadway width19 ft (5.7 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$355,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was C3011 over Middlebury River built?

It was built in 1936, making it 89 years old in 2025.

What condition is C3011 over Middlebury River 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 C3011 over Middlebury River carry?

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

How long is C3011 over Middlebury River?

The structure is 44 ft (13.4 m) long with a longest span of 42 ft (12.8 m) and a deck 20 ft wide.

Who owns C3011 over Middlebury River?

It is owned by the Town or Township Highway Agency.