US Bridges

Mechanicsbg Rd/Ch over I-72 / US 36

Fair

Sangamon County, Illinois · .75M E I-55 · Structure no. 084015000000000

Built
1974
51 years old, rebuilt 2014
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
250 ft
2 main spans
Daily traffic
3,250
2022 count
Owner
State
State Highway Agency

About this bridge

Mechanicsbg Rd/Ch over I-72 / US 36 is a steel continuous stringer/multi-beam or girder carrying Mechanicsbg Rd/Ch over I-72 / US 36 in Sangamon County, Illinois. It was built in 1974 and reconstructed in 2014, so it is 51 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 6 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 3,250 vehicles a day, roughly 5% of them trucks, projected to reach 3,737 by 2046. The structure is 250 ft (76.3 m) long and 68 ft wide.

Location

Open in Google Maps
CarriesMechanicsbg Rd/Ch
CrossesI-72 / US 36
Location.75M E I-55
CountySangamon County
StateIllinois
Coordinates39.80706, -89.57956
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating103.2 US tons
Inventory rating61.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20 + Mod
Structure length250 ft (76.3 m)
Longest span103 ft (31.3 m)
Deck width68 ft (20.7 m)
Roadway width46 ft (13.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,250 (2022)
Projected traffic3,737 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mechanicsbg Rd/Ch over I-72 / US 36 built?

It was built in 1974, making it 51 years old in 2025. It was reconstructed in 2014.

What condition is Mechanicsbg Rd/Ch over I-72 / US 36 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 December 2023.

How much traffic does Mechanicsbg Rd/Ch over I-72 / US 36 carry?

About 3,250 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Mechanicsbg Rd/Ch over I-72 / US 36?

The structure is 250 ft (76.3 m) long with a longest span of 103 ft (31.3 m) and a deck 68 ft wide.

Who owns Mechanicsbg Rd/Ch over I-72 / US 36?

It is owned by the State Highway Agency.