US Bridges

Vt 00100 Ml over Black River

Fair

Windsor County, Vermont · 0.9 MI S Jct. VT.100A · Structure no. 200013010914122

Built
1948
77 years old
Condition
Fair
inspected June 2023
Type
Tee Beam
Concrete
Length
34 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 concrete tee beam carrying Vt 00100 Ml over Black River in Windsor County, Vermont. It was built in 1948, so it is 77 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 5 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 1,400 vehicles a day, roughly 9% of them trucks, projected to reach 1,470 by 2028. The structure is 34 ft (10.4 m) long and 28 ft wide. If it were closed, the detour would be 36 mi (58 km).

CarriesVt 00100 Ml
CrossesBlack River
Location0.9 MI S Jct. VT.100A
RouteState Highway 100
StateVermont
Coordinates43.51871, -72.73239
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82 US tons
Inventory rating52 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length34 ft (10.4 m)
Longest span30 ft (9.1 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (7.9 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$376,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Vt 00100 Ml over Black River built?

It was built in 1948, making it 77 years old in 2025.

What condition is Vt 00100 Ml over Black 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 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 34 ft (10.4 m) long with a longest span of 30 ft (9.1 m) and a deck 28 ft wide.

Who owns Vt 00100 Ml over Black River?

It is owned by the State Highway Agency.