US Bridges

I-180 SB over Bottom RD FAS 246

Poor

Bureau County, Illinois · 1.4 MI S JCT ILL26 · Structure no. 006005300000000

Built
1968
57 years old
Condition
Poor
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
176 ft
3 main spans
Daily traffic
2,075
2023 count
Owner
State
State Highway Agency

About this bridge

I-180 SB over Bottom RD FAS 246 is a prestressed concrete stringer/multi-beam or girder carrying I-180 SB over Bottom RD FAS 246 in Bureau County, Illinois. It was built in 1968, so it is 57 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 2,075 vehicles a day, roughly 23% of them trucks, projected to reach 1,793 by 2046. The structure is 176 ft (53.7 m) long and 43 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesI-180 SB
CrossesBottom RD FAS 246
Location1.4 MI S JCT ILL26
RouteInterstate 180
CountyBureau County
StateIllinois
Coordinates41.29856, -89.40101
Functional classRural Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.2 US tons
Inventory rating49.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length176 ft (53.7 m)
Longest span58 ft (17.8 m)
Deck width43 ft (13 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,075 (2023)
Projected traffic1,793 by 2046
Trucks23%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-180 SB over Bottom RD FAS 246 built?

It was built in 1968, making it 57 years old in 2025.

What condition is I-180 SB over Bottom RD FAS 246 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in February 2024.

How much traffic does I-180 SB over Bottom RD FAS 246 carry?

About 2,075 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is I-180 SB over Bottom RD FAS 246?

The structure is 176 ft (53.7 m) long with a longest span of 58 ft (17.8 m) and a deck 43 ft wide.

Who owns I-180 SB over Bottom RD FAS 246?

It is owned by the State Highway Agency.