US Bridges

Old US 136 over County Ditch

Fair

Mason County, Illinois · S US136 1.2M E IL10 · Structure no. 063000600000000

Built
1928
97 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete
Length
30 ft
1 main span
Daily traffic
25
2024 count
Owner
State
State Highway Agency

About this bridge

Old US 136 over County Ditch is a concrete slab carrying Old US 136 over County Ditch in Mason County, Illinois. It was built in 1928, so it is 97 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 5 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 25 vehicles a day, roughly 80% of them trucks, projected to reach 25 by 2046. The structure is 30 ft (9.2 m) long and 42 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesOld US 136
CrossesCounty Ditch
LocationS US136 1.2M E IL10
RouteCounty Highway 0
CountyMason County
StateIllinois
Coordinates40.30007, -89.82853
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
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 geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.9 US tons
Inventory rating41.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length30 ft (9.2 m)
Longest span28 ft (8.6 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2024)
Projected traffic25 by 2046
Trucks80%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Old US 136 over County Ditch built?

It was built in 1928, making it 97 years old in 2025.

What condition is Old US 136 over County Ditch 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 September 2023.

How much traffic does Old US 136 over County Ditch carry?

About 25 vehicles per day (2024 count), of which roughly 80% are trucks.

How long is Old US 136 over County Ditch?

The structure is 30 ft (9.2 m) long with a longest span of 28 ft (8.6 m) and a deck 42 ft wide.

Who owns Old US 136 over County Ditch?

It is owned by the State Highway Agency.