US Bridges

Vt 00011 Ml over Lyman Brook

Fair

Windsor County, Vermont · 3.1 MI E JCT Vt 121 · Structure no. 200016004014012

Built
1929
96 years old, rebuilt 1972
Condition
Fair
inspected June 2023
Type
Tee Beam
Concrete
Length
28 ft
1 main span
Daily traffic
3,100
2018 count
Owner
State
State Highway Agency

About this bridge

Vt 00011 Ml over Lyman Brook is a concrete tee beam carrying Vt 00011 Ml over Lyman Brook in Windsor County, Vermont. It was built in 1929 and reconstructed in 1972, so it is 96 years old, older 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 3,100 vehicles a day, roughly 9% of them trucks, projected to reach 3,255 by 2028. The structure is 28 ft (8.5 m) long and 34 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesVt 00011 Ml
CrossesLyman Brook
Location3.1 MI E JCT Vt 121
RouteState Highway 11
CountyWindsor County
StateVermont
Coordinates43.25762, -72.71645
Functional classRural Minor Arterial

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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating31 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length28 ft (8.5 m)
Longest span27 ft (8.2 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,100 (2018)
Projected traffic3,255 by 2028
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo
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$383,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Vt 00011 Ml over Lyman Brook built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1972.

What condition is Vt 00011 Ml over Lyman 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 June 2023.

How much traffic does Vt 00011 Ml over Lyman Brook carry?

About 3,100 vehicles per day (2018 count), of which roughly 9% are trucks.

How long is Vt 00011 Ml over Lyman Brook?

The structure is 28 ft (8.5 m) long with a longest span of 27 ft (8.2 m) and a deck 34 ft wide.

Who owns Vt 00011 Ml over Lyman Brook?

It is owned by the State Highway Agency.