US Bridges

Vt 00100 Ml over Black River

Good

Windsor County, Vermont · 2.4 MI S Jct. VT.100A · Structure no. 200013010614122

Built
1974
51 years old
Condition
Good
inspected June 2023
Type
Slab
Prestressed Concrete
Length
43 ft
1 main span
Daily traffic
1,400
2018 count
Owner
State
State Highway Agency

About this bridge

Vt 00100 Ml over Black River is a prestressed concrete slab carrying Vt 00100 Ml over Black River in Windsor County, Vermont. It was built in 1974, so it is 51 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 1,400 vehicles a day, roughly 9% of them trucks, projected to reach 1,470 by 2028. The structure is 43 ft (13.1 m) long and 37 ft wide. If it were closed, the detour would be 36 mi (58 km).

CarriesVt 00100 Ml
CrossesBlack River
Location2.4 MI S Jct. VT.100A
RouteState Highway 100
StateVermont
Coordinates43.50036, -72.71812
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating43 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length43 ft (13.1 m)
Longest span40 ft (12.2 m)
Deck width37 ft (11.2 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,400 (2018)
Projected traffic1,470 by 2028
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed36 mi (58 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 Black River built?

It was built in 1974, making it 51 years old in 2025.

What condition is Vt 00100 Ml over Black 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 June 2023.

How much traffic does Vt 00100 Ml over Black River carry?

About 1,400 vehicles per day (2018 count), of which roughly 9% are trucks.

How long is Vt 00100 Ml over Black River?

The structure is 43 ft (13.1 m) long with a longest span of 40 ft (12.2 m) and a deck 37 ft wide.

Who owns Vt 00100 Ml over Black River?

It is owned by the State Highway Agency.