US Bridges

I 00091 Ml over I 91 over TH No 9

Fair

Caledonia County, Vermont · 1.7 MI N Exit 23 I91 · Structure no. 200091095N03072

Built
1972
53 years old
Condition
Fair
inspected June 2024
Type
Frame
Steel Continuous
Length
150 ft
3 main spans
Daily traffic
6,500
2018 count
Owner
State
State Highway Agency

About this bridge

I 00091 Ml over I 91 over TH No 9 is a steel continuous frame carrying I 00091 Ml over I 91 over TH No 9 in Caledonia County, Vermont. It was built in 1972, so it is 53 years old, younger 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 6,500 vehicles a day, roughly 16% of them trucks, projected to reach 6,825 by 2028. The structure is 150 ft (45.7 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 00091 Ml
CrossesI 91 over TH No 9
Location1.7 MI N Exit 23 I91
RouteInterstate 91
CountyCaledonia County
StateVermont
Coordinates44.53836, -72.01891
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating43 US tons

Structure

Structure typeFrame
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length150 ft (45.7 m)
Longest span70 ft (21.3 m)
Deck width43 ft (13.2 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,500 (2018)
Projected traffic6,825 by 2028
Trucks16%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 00091 Ml over I 91 over TH No 9 built?

It was built in 1972, making it 53 years old in 2025.

What condition is I 00091 Ml over I 91 over TH No 9 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 00091 Ml over I 91 over TH No 9 carry?

About 6,500 vehicles per day (2018 count), of which roughly 16% are trucks.

How long is I 00091 Ml over I 91 over TH No 9?

The structure is 150 ft (45.7 m) long with a longest span of 70 ft (21.3 m) and a deck 43 ft wide.

Who owns I 00091 Ml over I 91 over TH No 9?

It is owned by the State Highway Agency.