US Bridges

Il 17/FAP 649 over I-39/US 51

Fair

Marshall County, Illinois · .45 MI W of Il 251 · Structure no. 062005000000000

Built
1989
36 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
229 ft
3 main spans
Daily traffic
2,050
2023 count
Owner
State
State Highway Agency

About this bridge

Il 17/FAP 649 over I-39/US 51 is a steel continuous stringer/multi-beam or girder carrying Il 17/FAP 649 over I-39/US 51 in Marshall County, Illinois. It was built in 1989, so it is 36 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 2,050 vehicles a day, roughly 13% of them trucks, projected to reach 1,970 by 2046. The structure is 229 ft (69.8 m) long and 69 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesIl 17/FAP 649
CrossesI-39/US 51
Location.45 MI W of Il 251
RouteState Highway 17
CountyMarshall County
StateIllinois
Coordinates41.02799, -89.05624
Functional classRural Minor Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating75.4 US tons
Inventory rating44.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length229 ft (69.8 m)
Longest span167 ft (50.9 m)
Deck width69 ft (21.1 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,050 (2023)
Projected traffic1,970 by 2046
Trucks13%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.7 mi (6 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 Il 17/FAP 649 over I-39/US 51 built?

It was built in 1989, making it 36 years old in 2025.

What condition is Il 17/FAP 649 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 Il 17/FAP 649 over I-39/US 51 carry?

About 2,050 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is Il 17/FAP 649 over I-39/US 51?

The structure is 229 ft (69.8 m) long with a longest span of 167 ft (50.9 m) and a deck 69 ft wide.

Who owns Il 17/FAP 649 over I-39/US 51?

It is owned by the State Highway Agency.