US Bridges

I 00091 Ml over Mill Brook

Fair

Windsor County, Vermont · 0.3 MI S Exit 8 · Structure no. 200091291014202

Built
1965
60 years old
Condition
Fair
inspected May 2024
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
13,000
2018 count
Owner
State
State Highway Agency

About this bridge

I 00091 Ml over Mill Brook is a concrete culvert carrying I 00091 Ml over Mill Brook in Windsor 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 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 13,000 vehicles a day, roughly 13% of them trucks, projected to reach 13,650 by 2028. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesI 00091 Ml
CrossesMill Brook
Location0.3 MI S Exit 8
RouteInterstate 91
CountyWindsor County
StateVermont
Coordinates43.39886, -72.41462
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41 US tons
Inventory rating25 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 20
Structure length24 ft (7.3 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,000 (2018)
Projected traffic13,650 by 2028
Trucks13%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemYes

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$609,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I 00091 Ml over Mill Brook built?

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

What condition is I 00091 Ml over Mill Brook 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 May 2024.

How much traffic does I 00091 Ml over Mill Brook carry?

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

How long is I 00091 Ml over Mill Brook?

The structure is 24 ft (7.3 m) long with a longest span of 10 ft (3 m).

Who owns I 00091 Ml over Mill Brook?

It is owned by the State Highway Agency.