US Bridges

TR 00TH9 over TH No 9 over I 89

Fair

Chittenden County, Vermont · 2.0 MI N Exit 16 · Structure no. 2004050D7504051

Built
1964
61 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
261 ft
4 main spans
Daily traffic
8,200
2019 count
Owner
State
State Highway Agency

About this bridge

TR 00TH9 over TH No 9 over I 89 is a steel stringer/multi-beam or girder carrying TR 00TH9 over TH No 9 over I 89 in Chittenden County, Vermont. It was built in 1964, so it is 61 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. Its operating status is: open, would be posted or closed except for temporary shoring.

It carries about 8,200 vehicles a day, roughly 2% of them trucks, projected to reach 8,610 by 2029. The structure is 261 ft (79.6 m) long and 29 ft wide.

Location

Open in Google Maps
CarriesTR 00TH9
CrossesTH No 9 over I 89
Location2.0 MI N Exit 16
RouteCounty Highway 0TH9
CountyChittenden County
StateVermont
Coordinates44.53037, -73.19515
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, would be posted or closed except for temporary shoring
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47 US tons
Inventory rating28 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length261 ft (79.6 m)
Longest span87 ft (26.5 m)
Deck width29 ft (8.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,200 (2019)
Projected traffic8,610 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.7 million (2020 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was TR 00TH9 over TH No 9 over I 89 built?

It was built in 1964, making it 61 years old in 2025.

What condition is TR 00TH9 over TH No 9 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 00TH9 over TH No 9 over I 89 carry?

About 8,200 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is TR 00TH9 over TH No 9 over I 89?

The structure is 261 ft (79.6 m) long with a longest span of 87 ft (26.5 m) and a deck 29 ft wide.

Who owns TR 00TH9 over TH No 9 over I 89?

It is owned by the State Highway Agency.