US Bridges

C3029 over Marshfield Brook

Fair

Washington County, Vermont · 0.12 MI to JCT W CL3 TH9 · Structure no. 101209001112091

Built
1929
96 years old, rebuilt 1978
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
35 ft
1 main span
Daily traffic
50
2019 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

C3029 over Marshfield Brook is a steel stringer/multi-beam or girder carrying C3029 over Marshfield Brook in Washington County, Vermont. It was built in 1929 and reconstructed in 1978, 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 50 vehicles a day, roughly 2% of them trucks, projected to reach 53 by 2029. The structure is 35 ft (10.7 m) long and 16 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesC3029
CrossesMarshfield Brook
Location0.12 MI to JCT W CL3 TH9
CountyWashington County
StateVermont
Coordinates44.34632, -72.35503
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating65 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length35 ft (10.7 m)
Longest span32 ft (9.8 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2019)
Projected traffic53 by 2029
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was C3029 over Marshfield Brook built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1978.

What condition is C3029 over Marshfield 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 September 2023.

How much traffic does C3029 over Marshfield Brook carry?

About 50 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is C3029 over Marshfield Brook?

The structure is 35 ft (10.7 m) long with a longest span of 32 ft (9.8 m) and a deck 16 ft wide.

Who owns C3029 over Marshfield Brook?

It is owned by the Town or Township Highway Agency.