US Bridges

C3050 over Sterling Brook

Good

Lamoille County, Vermont · 0.01 MI to JCT W C3 TH60 · Structure no. 100807003908071

Built
1896
129 years old, rebuilt 1971
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
69 ft
1 main span
Daily traffic
150
2019 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

C3050 over Sterling Brook is a steel stringer/multi-beam or girder carrying C3050 over Sterling Brook in Lamoille County, Vermont. It was built in 1896 and reconstructed in 1971, so it is 129 years old, older 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 150 vehicles a day, roughly 2% of them trucks, projected to reach 158 by 2029. The structure is 69 ft (21 m) long and 15 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesC3050
CrossesSterling Brook
Location0.01 MI to JCT W C3 TH60
CountyLamoille County
StateVermont
Coordinates44.51858, -72.67774
Functional classRural Local

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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating71 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length69 ft (21 m)
Longest span65 ft (19.8 m)
Deck width15 ft (4.6 m)
Roadway width15 ft (4.5 m)
Vertical clearance over deck10 ft (3 m)

Traffic and service

Average daily traffic150 (2019)
Projected traffic158 by 2029
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$412,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was C3050 over Sterling Brook built?

It was built in 1896, making it 129 years old in 2025. It was reconstructed in 1971.

What condition is C3050 over Sterling Brook 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 August 2023.

How much traffic does C3050 over Sterling Brook carry?

About 150 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is C3050 over Sterling Brook?

The structure is 69 ft (21 m) long with a longest span of 65 ft (19.8 m) and a deck 15 ft wide.

Who owns C3050 over Sterling Brook?

It is owned by the Town or Township Highway Agency.