US Bridges

I 00091 Ml over I 91 over TH77/PR /Crlrr

Good

Caledonia County, Vermont · 0.2 MI S Exit 20 · Structure no. 200091082N03112

Built
1978
47 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
536 ft
3 main spans
Daily traffic
10,000
2018 count
Owner
State
State Highway Agency

About this bridge

I 00091 Ml over I 91 over TH77/PR /Crlrr is a steel continuous stringer/multi-beam or girder carrying I 00091 Ml over I 91 over TH77/PR /Crlrr in Caledonia County, Vermont. It was built in 1978, so it is 47 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 10,000 vehicles a day, roughly 13% of them trucks, projected to reach 10,500 by 2028. The structure is 536 ft (163.4 m) long and 47 ft wide.

Location

Open in Google Maps
CarriesI 00091 Ml
CrossesI 91 over TH77/PR /Crlrr
Location0.2 MI S Exit 20
RouteInterstate 91
CountyCaledonia County
StateVermont
Coordinates44.40117, -72.02007
Functional classUrban 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 inspectionMay 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 rating75 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length536 ft (163.4 m)
Longest span220 ft (67.1 m)
Deck width47 ft (14.2 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2018)
Projected traffic10,500 by 2028
Trucks13%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway, waterway and railroad
Detour if closed—
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$8.8 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I 00091 Ml over I 91 over TH77/PR /Crlrr built?

It was built in 1978, making it 47 years old in 2025.

What condition is I 00091 Ml over I 91 over TH77/PR /Crlrr 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 May 2024.

How much traffic does I 00091 Ml over I 91 over TH77/PR /Crlrr carry?

About 10,000 vehicles per day (2018 count), of which roughly 13% are trucks.

How long is I 00091 Ml over I 91 over TH77/PR /Crlrr?

The structure is 536 ft (163.4 m) long with a longest span of 220 ft (67.1 m) and a deck 47 ft wide.

Who owns I 00091 Ml over I 91 over TH77/PR /Crlrr?

It is owned by the State Highway Agency.