US Bridges

I 00091 Ml over I 91 over TH No 20

Good

Windham County, Vermont · 3.4 MI N Exit 6 · Structure no. 20009124-513142

Built
1965
60 years old
Condition
Good
inspected May 2024
Type
Frame
Concrete
Length
28 ft
1 main span
Daily traffic
15,000
2018 count
Owner
State
State Highway Agency

About this bridge

I 00091 Ml over I 91 over TH No 20 is a concrete frame carrying I 00091 Ml over I 91 over TH No 20 in Windham 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 15,000 vehicles a day, roughly 13% of them trucks, projected to reach 15,750 by 2028. The structure is 28 ft (8.5 m) long and 38 ft wide.

CarriesI 00091 Ml
CrossesI 91 over TH No 20
Location3.4 MI N Exit 6
RouteInterstate 91
StateVermont
Coordinates43.2263, -72.4529
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.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41 US tons
Inventory rating25 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length28 ft (8.5 m)
Longest span25 ft (7.6 m)
Deck width38 ft (11.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,000 (2018)
Projected traffic15,750 by 2028
Trucks13%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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$329,000 (2020 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 00091 Ml over I 91 over TH No 20 built?

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

What condition is I 00091 Ml over I 91 over TH No 20 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 TH No 20 carry?

About 15,000 vehicles per day (2018 count), of which roughly 13% are trucks.

How long is I 00091 Ml over I 91 over TH No 20?

The structure is 28 ft (8.5 m) long with a longest span of 25 ft (7.6 m) and a deck 38 ft wide.

Who owns I 00091 Ml over I 91 over TH No 20?

It is owned by the State Highway Agency.