US Bridges

Illinois Loop over UP RR

FairPosted for load

Mercer County, Missouri · S 21 T 64 N R 24 W · Structure no. 19703

Built
1930
95 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
107 ft
5 main spans
Daily traffic
5
2024 count
Owner
County
County Highway Agency

About this bridge

Illinois Loop over UP RR is a wood or timber stringer/multi-beam or girder carrying Illinois Loop over UP RR in Mercer County, Missouri. It was built in 1930, so it is 95 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 5 vehicles a day, roughly 10% of them trucks, projected to reach 6 by 2044. The structure is 107 ft (32.6 m) long and 21 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesIllinois Loop
CrossesUP RR
LocationS 21 T 64 N R 24 W
RouteCounty Highway 230
CountyMercer County
StateMissouri
Coordinates40.33046, -93.59728
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating19.8 US tons
Inventory rating10.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans5
Design loadOther
Structure length107 ft (32.6 m)
Longest span21 ft (6.4 m)
Deck width21 ft (6.4 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2024)
Projected traffic6 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$749,000 (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Illinois Loop over UP RR built?

It was built in 1930, making it 95 years old in 2025.

What condition is Illinois Loop over UP RR 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 2024.

How much traffic does Illinois Loop over UP RR carry?

About 5 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Illinois Loop over UP RR?

The structure is 107 ft (32.6 m) long with a longest span of 21 ft (6.4 m) and a deck 21 ft wide.

Who owns Illinois Loop over UP RR?

It is owned by the County Highway Agency.