US Bridges

Vt 0100C Alt over Gihon River

Good

Lamoille County, Vermont · 0.9 MI N Jct. VT.15 · Structure no. 200248000108062

Built
1929
96 years old, rebuilt 2018
Condition
Good
inspected September 2023
Type
Slab
Prestressed Concrete
Length
39 ft
1 main span
Daily traffic
2,700
2018 count
Owner
State
State Highway Agency

About this bridge

Vt 0100C Alt over Gihon River is a prestressed concrete slab carrying Vt 0100C Alt over Gihon River in Lamoille County, Vermont. It was built in 1929 and reconstructed in 2018, so it is 96 years old, older 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 2,700 vehicles a day, roughly 5% of them trucks, projected to reach 2,835 by 2028. The structure is 39 ft (11.9 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesVt 0100C Alt
CrossesGihon River
Location0.9 MI N Jct. VT.15
RouteState Highway 100C
StateVermont
Coordinates44.64023, -72.66066
Functional classRural Major Collector

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 protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating61 US tons
Inventory rating47 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length39 ft (11.9 m)
Longest span37 ft (11.3 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,700 (2018)
Projected traffic2,835 by 2028
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Vt 0100C Alt over Gihon River built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 2018.

What condition is Vt 0100C Alt over Gihon 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 0100C Alt over Gihon River carry?

About 2,700 vehicles per day (2018 count), of which roughly 5% are trucks.

How long is Vt 0100C Alt over Gihon River?

The structure is 39 ft (11.9 m) long with a longest span of 37 ft (11.3 m) and a deck 30 ft wide.

Who owns Vt 0100C Alt over Gihon River?

It is owned by the State Highway Agency.