US Bridges

C3704 over Whetstone Brook

Fair

Windham County, Vermont · 0.01 MI to JCT W TH704 · Structure no. 101302001113021

Built
1981
44 years old
Condition
Fair
inspected September 2024
Type
Slab
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
400
2019 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

C3704 over Whetstone Brook is a prestressed concrete slab carrying C3704 over Whetstone Brook in Windham County, Vermont. It was built in 1981, so it is 44 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 400 vehicles a day, roughly 2% of them trucks, projected to reach 420 by 2029. The structure is 50 ft (15.2 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesC3704
CrossesWhetstone Brook
Location0.01 MI to JCT W TH704
CountyWindham County
StateVermont
Coordinates42.85946, -72.60247
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99 US tons
Inventory rating52 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 20
Structure length50 ft (15.2 m)
Longest span48 ft (14.6 m)
Deck width26 ft (7.8 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2019)
Projected traffic420 by 2029
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 C3704 over Whetstone Brook built?

It was built in 1981, making it 44 years old in 2025.

What condition is C3704 over Whetstone 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 2024.

How much traffic does C3704 over Whetstone Brook carry?

About 400 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is C3704 over Whetstone Brook?

The structure is 50 ft (15.2 m) long with a longest span of 48 ft (14.6 m) and a deck 26 ft wide.

Who owns C3704 over Whetstone Brook?

It is owned by the Town or Township Highway Agency.