US Bridges

Vt 00100 Ml over Mad River

Good

Washington County, Vermont · 3.1 MI S Jct. VT.17 · Structure no. 200013017312172

Built
2013
12 years old
Condition
Good
inspected September 2023
Type
Truss - Thru
Steel
Length
147 ft
1 main span
Daily traffic
5,500
2018 count
Owner
State
State Highway Agency

About this bridge

Vt 00100 Ml over Mad River is a steel truss - thru carrying Vt 00100 Ml over Mad River in Washington County, Vermont. It was built in 2013, so it is 12 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 5,500 vehicles a day, roughly 6% of them trucks, projected to reach 5,775 by 2028. The structure is 147 ft (44.8 m) long and 35 ft wide. If it were closed, the detour would be 28 mi (45 km).

Location

Open in Google Maps
CarriesVt 00100 Ml
CrossesMad River
Location3.1 MI S Jct. VT.17
RouteState Highway 100
CountyWashington County
StateVermont
Coordinates44.14118, -72.8447
Functional classRural Minor Arterial

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating37 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length147 ft (44.8 m)
Longest span139 ft (42.4 m)
Deck width35 ft (10.7 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,500 (2018)
Projected traffic5,775 by 2028
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed28 mi (45 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.9 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Vt 00100 Ml over Mad River built?

It was built in 2013, making it 12 years old in 2025.

What condition is Vt 00100 Ml over Mad River 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 Vt 00100 Ml over Mad River carry?

About 5,500 vehicles per day (2018 count), of which roughly 6% are trucks.

How long is Vt 00100 Ml over Mad River?

The structure is 147 ft (44.8 m) long with a longest span of 139 ft (42.4 m) and a deck 35 ft wide.

Who owns Vt 00100 Ml over Mad River?

It is owned by the State Highway Agency.