US Bridges

Mound Road over Il 104

Good

Morgan County, Illinois · .3M N Morton-Jacksvl · Structure no. 069052100000000

Built
2011
14 years old
Condition
Good
inspected November 2021
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
147 ft
3 main spans
Daily traffic
1,050
2024 count
Owner
State
State Highway Agency

About this bridge

Mound Road over Il 104 is a steel continuous stringer/multi-beam or girder carrying Mound Road over Il 104 in Morgan County, Illinois. It was built in 2011, so it is 14 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,050 vehicles a day, roughly 3% of them trucks, projected to reach 1,515 by 2046. The structure is 147 ft (44.7 m) long and 40 ft wide.

Location

Open in Google Maps
CarriesMound Road
CrossesIl 104
Location.3M N Morton-Jacksvl
CountyMorgan County
StateIllinois
Coordinates39.72699, -90.27405
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionNovember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93.6 US tons
Inventory rating52.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length147 ft (44.7 m)
Longest span64 ft (19.5 m)
Deck width40 ft (12.1 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,050 (2024)
Projected traffic1,515 by 2046
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 Mound Road over Il 104 built?

It was built in 2011, making it 14 years old in 2025.

What condition is Mound Road over Il 104 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2021.

How much traffic does Mound Road over Il 104 carry?

About 1,050 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is Mound Road over Il 104?

The structure is 147 ft (44.7 m) long with a longest span of 64 ft (19.5 m) and a deck 40 ft wide.

Who owns Mound Road over Il 104?

It is owned by the State Highway Agency.