US Bridges

Vt 00100 Ml over Gihon River

Fair

Lamoille County, Vermont · 1.2 MI N Jct. VT.118 · Structure no. 200029022308032

Built
1931
94 years old, rebuilt 1970
Condition
Fair
inspected September 2023
Type
Slab
Concrete
Length
23 ft
1 main span
Daily traffic
3,800
2018 count
Owner
State
State Highway Agency

About this bridge

Vt 00100 Ml over Gihon River is a concrete slab carrying Vt 00100 Ml over Gihon River in Lamoille County, Vermont. It was built in 1931 and reconstructed in 1970, so it is 94 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 3,800 vehicles a day, roughly 9% of them trucks, projected to reach 3,990 by 2028. The structure is 23 ft (7 m) long and 32 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

CarriesVt 00100 Ml
CrossesGihon River
Location1.2 MI N Jct. VT.118
RouteState Highway 100
StateVermont
Coordinates44.71357, -72.52261
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 alignment6: Equal to present minimum criteria
Operating rating59 US tons
Inventory rating35.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length23 ft (7 m)
Longest span21 ft (6.4 m)
Deck width32 ft (9.9 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,800 (2018)
Projected traffic3,990 by 2028
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 km)
TollOn a free road
National Highway SystemNo
Strategic Highway NetworkInterstate STRAHNET route

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$311,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Vt 00100 Ml over Gihon River built?

It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1970.

What condition is Vt 00100 Ml over Gihon 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 September 2023.

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

About 3,800 vehicles per day (2018 count), of which roughly 9% are trucks.

How long is Vt 00100 Ml over Gihon River?

The structure is 23 ft (7 m) long with a longest span of 21 ft (6.4 m) and a deck 32 ft wide.

Who owns Vt 00100 Ml over Gihon River?

It is owned by the State Highway Agency.