US Bridges

Vt 00100 Ml over Tunnel Brook

Fair

Addison County, Vermont · 0.8 MI S JCT Vt 125 · Structure no. 200013144A01082

Built
1976
49 years old
Condition
Fair
inspected August 2023
Type
Culvert
Steel
Length
20 ft
2 main spans
Daily traffic
1,900
2018 count
Owner
State
State Highway Agency

About this bridge

Vt 00100 Ml over Tunnel Brook is a steel culvert carrying Vt 00100 Ml over Tunnel Brook in Addison County, Vermont. It was built in 1976, so it is 49 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 1,900 vehicles a day, roughly 9% of them trucks, projected to reach 1,995 by 2028. The structure is 20 ft (6.1 m) long. If it were closed, the detour would be 42.9 mi (69 km).

CarriesVt 00100 Ml
CrossesTunnel Brook
Location0.8 MI S JCT Vt 125
RouteState Highway 100
StateVermont
Coordinates43.91457, -72.83928
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41 US tons
Inventory rating25 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadH 20
Structure length20 ft (6.1 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,900 (2018)
Projected traffic1,995 by 2028
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed42.9 mi (69 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Vt 00100 Ml over Tunnel Brook built?

It was built in 1976, making it 49 years old in 2025.

What condition is Vt 00100 Ml over Tunnel 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 2023.

How much traffic does Vt 00100 Ml over Tunnel Brook carry?

About 1,900 vehicles per day (2018 count), of which roughly 9% are trucks.

How long is Vt 00100 Ml over Tunnel Brook?

The structure is 20 ft (6.1 m) long with a longest span of 9 ft (2.7 m).

Who owns Vt 00100 Ml over Tunnel Brook?

It is owned by the State Highway Agency.