US Bridges

High School Road over Stream

Fair

Jackson County, Illinois · NW Corner Mboro · Structure no. 039600200000000

Built
1978
47 years old
Condition
Fair
inspected January 2022
Type
Culvert
Concrete
Length
29 ft
3 main spans
Daily traffic
10
2022 count
Owner
Local
Other Local Agency

About this bridge

High School Road over Stream is a concrete culvert carrying High School Road over Stream in Jackson County, Illinois. It was built in 1978, so it is 47 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 10 vehicles a day, projected to reach 606 by 2046. The structure is 29 ft (8.8 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesHigh School Road
CrossesStream
LocationNW Corner Mboro
CountyJackson County
StateIllinois
Coordinates37.78164, -89.34295
Functional classUrban 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length29 ft (8.8 m)
Longest span8 ft (2.4 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2022)
Projected traffic606 by 2046
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local 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 High School Road over Stream built?

It was built in 1978, making it 47 years old in 2025.

What condition is High School Road over Stream 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 January 2022.

How much traffic does High School Road over Stream carry?

About 10 vehicles per day (2022 count).

How long is High School Road over Stream?

The structure is 29 ft (8.8 m) long with a longest span of 8 ft (2.4 m) and a deck 33 ft wide.

Who owns High School Road over Stream?

It is owned by the Other Local Agency.