US Bridges

Royalton RD over Little Muddy River

Fair

Jackson County, Illinois · 1.6 MI E of US 51 · Structure no. 039327700000000

Built
2016
9 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete Continuous
Length
270 ft
3 main spans
Daily traffic
1,550
2022 count
Owner
County
County Highway Agency

About this bridge

Royalton RD over Little Muddy River is a concrete continuous slab carrying Royalton RD over Little Muddy River in Jackson County, Illinois. It was built in 2016, so it is 9 years old, younger 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 1,550 vehicles a day, roughly 10% of them trucks, projected to reach 1,566 by 2046. The structure is 270 ft (82.3 m) long and 30 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesRoyalton RD
CrossesLittle Muddy River
Location1.6 MI E of US 51
RouteCounty Highway 0
CountyJackson County
StateIllinois
Coordinates37.90122, -89.20895
Functional classRural Major Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length270 ft (82.3 m)
Longest span102 ft (31.2 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,550 (2022)
Projected traffic1,566 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway 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 Royalton RD over Little Muddy River built?

It was built in 2016, making it 9 years old in 2025.

What condition is Royalton RD over Little Muddy River 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 March 2024.

How much traffic does Royalton RD over Little Muddy River carry?

About 1,550 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Royalton RD over Little Muddy River?

The structure is 270 ft (82.3 m) long with a longest span of 102 ft (31.2 m) and a deck 30 ft wide.

Who owns Royalton RD over Little Muddy River?

It is owned by the County Highway Agency.