US Bridges

I 00089 Ml over Missisquoi River

Fair

Franklin County, Vermont · 0.6 MI S Exit 21 · Structure no. 200089096N06152

Built
1964
61 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
363 ft
3 main spans
Daily traffic
10,700
2018 count
Owner
State
State Highway Agency

About this bridge

I 00089 Ml over Missisquoi River is a steel stringer/multi-beam or girder carrying I 00089 Ml over Missisquoi River in Franklin County, Vermont. It was built in 1964, so it is 61 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 6 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 10,700 vehicles a day, roughly 13% of them trucks, projected to reach 11,235 by 2028. The structure is 363 ft (110.6 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 00089 Ml
CrossesMissisquoi River
Location0.6 MI S Exit 21
RouteInterstate 89
StateVermont
Coordinates44.91443, -73.10336
Functional classRural Principal Arterial - Interstate

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating75.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length363 ft (110.6 m)
Longest span145 ft (44.2 m)
Deck width35 ft (10.7 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,700 (2018)
Projected traffic11,235 by 2028
Trucks13%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
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$4.5 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I 00089 Ml over Missisquoi River built?

It was built in 1964, making it 61 years old in 2025.

What condition is I 00089 Ml over Missisquoi 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 2024.

How much traffic does I 00089 Ml over Missisquoi River carry?

About 10,700 vehicles per day (2018 count), of which roughly 13% are trucks.

How long is I 00089 Ml over Missisquoi River?

The structure is 363 ft (110.6 m) long with a longest span of 145 ft (44.2 m) and a deck 35 ft wide.

Who owns I 00089 Ml over Missisquoi River?

It is owned by the State Highway Agency.