US Bridges

TR 00TH1 over TH No 1 over I 89

Fair

Chittenden County, Vermont · 2.3 MI N Exit 12 · Structure no. 2004170D6004171

Built
1962
63 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
399 ft
6 main spans
Daily traffic
500
2019 count
Owner
State
State Highway Agency

About this bridge

TR 00TH1 over TH No 1 over I 89 is a steel stringer/multi-beam or girder carrying TR 00TH1 over TH No 1 over I 89 in Chittenden County, Vermont. It was built in 1962, so it is 63 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 5 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 500 vehicles a day, roughly 2% of them trucks, projected to reach 525 by 2029. The structure is 399 ft (121.6 m) long and 35 ft wide.

Location

Open in Google Maps
CarriesTR 00TH1
CrossesTH No 1 over I 89
Location2.3 MI N Exit 12
RouteCounty Highway 0TH1
CountyChittenden County
StateVermont
Coordinates44.43426, -73.07081
Functional classUrban Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length399 ft (121.6 m)
Longest span72 ft (21.9 m)
Deck width35 ft (10.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2019)
Projected traffic525 by 2029
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was TR 00TH1 over TH No 1 over I 89 built?

It was built in 1962, making it 63 years old in 2025.

What condition is TR 00TH1 over TH No 1 over I 89 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 2024.

How much traffic does TR 00TH1 over TH No 1 over I 89 carry?

About 500 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is TR 00TH1 over TH No 1 over I 89?

The structure is 399 ft (121.6 m) long with a longest span of 72 ft (21.9 m) and a deck 35 ft wide.

Who owns TR 00TH1 over TH No 1 over I 89?

It is owned by the State Highway Agency.