US Bridges

TR 551 over FAI 172

Fair

Adams County, Illinois · 2 MI S I172/IL96 · Structure no. 001005800000000

Built
1981
44 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
261 ft
2 main spans
Daily traffic
75
2024 count
Owner
State
State Highway Agency

About this bridge

TR 551 over FAI 172 is a steel continuous stringer/multi-beam or girder carrying TR 551 over FAI 172 in Adams County, Illinois. It was built in 1981, so it is 44 years old, younger than the Illinois average of 45.3 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 75 vehicles a day, projected to reach 76 by 2046. The structure is 261 ft (79.7 m) long and 33 ft wide.

Location

Open in Google Maps
CarriesTR 551
CrossesFAI 172
Location2 MI S I172/IL96
RouteCounty Highway 0
CountyAdams County
StateIllinois
Coordinates39.8161, -91.30248
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.6 US tons
Inventory rating44.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length261 ft (79.7 m)
Longest span110 ft (33.5 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2024)
Projected traffic76 by 2046
Trucks0%
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 551 over FAI 172 built?

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

What condition is TR 551 over FAI 172 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 May 2023.

How much traffic does TR 551 over FAI 172 carry?

About 75 vehicles per day (2024 count).

How long is TR 551 over FAI 172?

The structure is 261 ft (79.7 m) long with a longest span of 110 ft (33.5 m) and a deck 33 ft wide.

Who owns TR 551 over FAI 172?

It is owned by the State Highway Agency.