US Bridges

TR 30A(STRAWN Rd) over South Fork Creek

Poor

Macon County, Illinois · 3.9 MI NW Warrensbur · Structure no. 058309400000000

Built
1909
116 years old, rebuilt 1980
Condition
Poor
inspected January 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
46 ft
1 main span
Daily traffic
25
2020 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 30A(STRAWN Rd) over South Fork Creek is a prestressed concrete box beam or girders - multiple carrying TR 30A(STRAWN Rd) over South Fork Creek in Macon County, Illinois. It was built in 1909 and reconstructed in 1980, so it is 116 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 2 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. Its operating status is: open, would be posted or closed except for temporary shoring.

It carries about 25 vehicles a day, roughly 8% of them trucks, projected to reach 25 by 2046. The structure is 46 ft (14 m) long and 21 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesTR 30A(STRAWN Rd)
CrossesSouth Fork Creek
Location3.9 MI NW Warrensbur
RouteCounty Highway 0
Coordinates39.95784, -89.12438
Functional classRural Local

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
Deck2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Superstructure2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, would be posted or closed except for temporary shoring
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating32.8 US tons
Inventory rating19.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length46 ft (14 m)
Longest span45 ft (13.7 m)
Deck width21 ft (6.4 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2020)
Projected traffic25 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 TR 30A(STRAWN Rd) over South Fork Creek built?

It was built in 1909, making it 116 years old in 2025. It was reconstructed in 1980.

What condition is TR 30A(STRAWN Rd) over South Fork Creek 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 TR 30A(STRAWN Rd) over South Fork Creek carry?

About 25 vehicles per day (2020 count), of which roughly 8% are trucks.

How long is TR 30A(STRAWN Rd) over South Fork Creek?

The structure is 46 ft (14 m) long with a longest span of 45 ft (13.7 m) and a deck 21 ft wide.

Who owns TR 30A(STRAWN Rd) over South Fork Creek?

It is owned by the Town or Township Highway Agency.