US Bridges

TR-21 over Muddy Creek

Fair

Crawford County, Illinois · 1.1 MI NW Annapolis · Structure no. 017381000000000

Built
1978
47 years old
Condition
Fair
inspected March 2023
Type
Channel Beam
Concrete
Length
60 ft
2 main spans
Daily traffic
50
2020 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR-21 over Muddy Creek is a concrete channel beam carrying TR-21 over Muddy Creek in Crawford 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 50 vehicles a day, roughly 12% of them trucks, projected to reach 51 by 2046. The structure is 60 ft (18.3 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesTR-21
CrossesMuddy Creek
Location1.1 MI NW Annapolis
RouteCounty Highway 0
CountyCrawford County
StateIllinois
Coordinates39.15917, -87.82706
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span29 ft (8.8 m)
Deck width26 ft (8 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2020)
Projected traffic51 by 2046
Trucks12%
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

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 TR-21 over Muddy Creek built?

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

What condition is TR-21 over Muddy 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 March 2023.

How much traffic does TR-21 over Muddy Creek carry?

About 50 vehicles per day (2020 count), of which roughly 12% are trucks.

How long is TR-21 over Muddy Creek?

The structure is 60 ft (18.3 m) long with a longest span of 29 ft (8.8 m) and a deck 26 ft wide.

Who owns TR-21 over Muddy Creek?

It is owned by the Town or Township Highway Agency.