US Bridges

Ch 14 over I-39/US 51

Fair

Marshall County, Illinois · 2.19 MI N of Ill 17 · Structure no. 062004800000000

Built
1990
35 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
239 ft
3 main spans
Daily traffic
500
2024 count
Owner
State
State Highway Agency

About this bridge

Ch 14 over I-39/US 51 is a steel continuous stringer/multi-beam or girder carrying Ch 14 over I-39/US 51 in Marshall County, Illinois. It was built in 1990, so it is 35 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 5 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 500 vehicles a day, roughly 15% of them trucks, projected to reach 429 by 2046. The structure is 239 ft (72.8 m) long and 37 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCh 14
CrossesI-39/US 51
Location2.19 MI N of Ill 17
RouteCounty Highway 0
CountyMarshall County
StateIllinois
Coordinates41.05741, -89.06675
Functional classRural Minor 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.
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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating68.6 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length239 ft (72.8 m)
Longest span170 ft (51.8 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2024)
Projected traffic429 by 2046
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ch 14 over I-39/US 51 built?

It was built in 1990, making it 35 years old in 2025.

What condition is Ch 14 over I-39/US 51 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 Ch 14 over I-39/US 51 carry?

About 500 vehicles per day (2024 count), of which roughly 15% are trucks.

How long is Ch 14 over I-39/US 51?

The structure is 239 ft (72.8 m) long with a longest span of 170 ft (51.8 m) and a deck 37 ft wide.

Who owns Ch 14 over I-39/US 51?

It is owned by the State Highway Agency.