US Bridges

FAI 172 over Branch of Mill Creek

Fair

Adams County, Illinois · 1.2MI N I172/IL96 · Structure no. 001200700000000

Built
1975
50 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
30 ft
2 main spans
Daily traffic
7,400
2023 count
Owner
State
State Highway Agency

About this bridge

FAI 172 over Branch of Mill Creek is a concrete culvert carrying FAI 172 over Branch of Mill Creek in Adams County, Illinois. It was built in 1975, so it is 50 years old, older 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 7,400 vehicles a day, roughly 18% of them trucks, projected to reach 7,474 by 2046. The structure is 30 ft (9 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFAI 172
CrossesBranch of Mill Creek
Location1.2MI N I172/IL96
RouteInterstate 172
CountyAdams County
StateIllinois
Coordinates39.8948, -91.32312
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating98.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length30 ft (9 m)
Longest span13 ft (3.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,400 (2023)
Projected traffic7,474 by 2046
Trucks18%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was FAI 172 over Branch of Mill Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is FAI 172 over Branch of Mill Creek 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 July 2023.

How much traffic does FAI 172 over Branch of Mill Creek carry?

About 7,400 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is FAI 172 over Branch of Mill Creek?

The structure is 30 ft (9 m) long with a longest span of 13 ft (3.9 m).

Who owns FAI 172 over Branch of Mill Creek?

It is owned by the State Highway Agency.