US Bridges

C2003 over Mill Brook

Fair

Chittenden County, Vermont · JCT of CL2 TH3 & CL3 TH27 · Structure no. 100409001304091

Built
1939
86 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
54 ft
1 main span
Daily traffic
850
2019 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

C2003 over Mill Brook is a steel stringer/multi-beam or girder carrying C2003 over Mill Brook in Chittenden County, Vermont. It was built in 1939, so it is 86 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 850 vehicles a day, roughly 2% of them trucks, projected to reach 893 by 2029. The structure is 54 ft (16.5 m) long and 23 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesC2003
CrossesMill Brook
LocationJCT of CL2 TH3 & CL3 TH27
CountyChittenden County
StateVermont
Coordinates44.45062, -72.92571
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating31 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length54 ft (16.5 m)
Longest span52 ft (15.8 m)
Deck width23 ft (7.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic850 (2019)
Projected traffic893 by 2029
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$492,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was C2003 over Mill Brook built?

It was built in 1939, making it 86 years old in 2025.

What condition is C2003 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 September 2023.

How much traffic does C2003 over Mill Brook carry?

About 850 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is C2003 over Mill Brook?

The structure is 54 ft (16.5 m) long with a longest span of 52 ft (15.8 m) and a deck 23 ft wide.

Who owns C2003 over Mill Brook?

It is owned by the Town or Township Highway Agency.