US Bridges

Ill 145 over Stream

Poor

Pope County, Illinois · 2.6 MI N Ill 146 · Structure no. 076001400000000

Built
1947
78 years old
Condition
Poor
inspected January 2024
Type
Tee Beam
Concrete
Length
34 ft
1 main span
Daily traffic
1,150
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 145 over Stream is a concrete tee beam carrying Ill 145 over Stream in Pope County, Illinois. It was built in 1947, so it is 78 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 1,150 vehicles a day, roughly 16% of them trucks, projected to reach 1,162 by 2046. The structure is 34 ft (10.5 m) long and 31 ft wide. If it were closed, the detour would be 37.9 mi (61 km).

CarriesIll 145
CrossesStream
Location2.6 MI N Ill 146
RouteState Highway 145
Coordinates37.42088, -88.67321
Functional classRural Minor Arterial

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
Deck4 PoorAdvanced section loss, deterioration, 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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.8 US tons
Inventory rating32.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length34 ft (10.5 m)
Longest span33 ft (10.2 m)
Deck width31 ft (9.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,150 (2023)
Projected traffic1,162 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.9 mi (61 km)
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ill 145 over Stream built?

It was built in 1947, making it 78 years old in 2025.

What condition is Ill 145 over Stream 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 January 2024.

How much traffic does Ill 145 over Stream carry?

About 1,150 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is Ill 145 over Stream?

The structure is 34 ft (10.5 m) long with a longest span of 33 ft (10.2 m) and a deck 31 ft wide.

Who owns Ill 145 over Stream?

It is owned by the State Highway Agency.