US Bridges

I 00089 Ml over Rock River

Good

Franklin County, Vermont · 1.5 MI S Exit 22 · Structure no. 200089100S06092

Built
1965
60 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
297 ft
3 main spans
Daily traffic
3,400
2018 count
Owner
State
State Highway Agency

About this bridge

I 00089 Ml over Rock River is a steel stringer/multi-beam or girder carrying I 00089 Ml over Rock River in Franklin County, Vermont. It was built in 1965, so it is 60 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 3,400 vehicles a day, roughly 13% of them trucks, projected to reach 3,570 by 2028. The structure is 297 ft (90.5 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 00089 Ml
CrossesRock River
Location1.5 MI S Exit 22
RouteInterstate 89
StateVermont
Coordinates44.98858, -73.08668
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
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 evaluation7: Better than 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 rating63.1 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length297 ft (90.5 m)
Longest span97 ft (29.6 m)
Deck width35 ft (10.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,400 (2018)
Projected traffic3,570 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 00089 Ml over Rock River built?

It was built in 1965, making it 60 years old in 2025.

What condition is I 00089 Ml over Rock 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 2024.

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

About 3,400 vehicles per day (2018 count), of which roughly 13% are trucks.

How long is I 00089 Ml over Rock River?

The structure is 297 ft (90.5 m) long with a longest span of 97 ft (29.6 m) and a deck 35 ft wide.

Who owns I 00089 Ml over Rock River?

It is owned by the State Highway Agency.