US Bridges

Il 78 Spur over Little Indian Creek

Fair

Morgan County, Illinois · .23M S Cass Co. Line · Structure no. 069000100000000

Built
1929
96 years old
Condition
Fair
inspected April 2024
Type
Tee Beam
Concrete
Length
88 ft
2 main spans
Daily traffic
75
2024 count
Owner
State
State Highway Agency

About this bridge

Il 78 Spur over Little Indian Creek is a concrete tee beam carrying Il 78 Spur over Little Indian Creek in Morgan County, Illinois. It was built in 1929, so it is 96 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 75 vehicles a day, projected to reach 76 by 2046. The structure is 88 ft (26.8 m) long and 61 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

CarriesIl 78 Spur
CrossesLittle Indian Creek
Location.23M S Cass Co. Line
Coordinates39.86987, -90.21621
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 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 geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.9 US tons
Inventory rating47.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length88 ft (26.8 m)
Longest span42 ft (12.9 m)
Deck width61 ft (18.6 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2024)
Projected traffic76 by 2046
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Il 78 Spur over Little Indian Creek built?

It was built in 1929, making it 96 years old in 2025.

What condition is Il 78 Spur over Little Indian 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 April 2024.

How much traffic does Il 78 Spur over Little Indian Creek carry?

About 75 vehicles per day (2024 count).

How long is Il 78 Spur over Little Indian Creek?

The structure is 88 ft (26.8 m) long with a longest span of 42 ft (12.9 m) and a deck 61 ft wide.

Who owns Il 78 Spur over Little Indian Creek?

It is owned by the State Highway Agency.