US Bridges

Il 40 FAP 646 over Ditch # 4

Fair

Bureau County, Illinois · 3 Mi. N. of I-80 · Structure no. 006015700000000

Built
1993
32 years old
Condition
Fair
inspected February 2021
Type
Stringer/Multi-beam or Girder
Steel
Length
65 ft
1 main span
Daily traffic
2,400
2023 count
Owner
State
State Highway Agency

About this bridge

Il 40 FAP 646 over Ditch # 4 is a steel stringer/multi-beam or girder carrying Il 40 FAP 646 over Ditch # 4 in Bureau County, Illinois. It was built in 1993, so it is 32 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 2,400 vehicles a day, roughly 16% of them trucks, projected to reach 3,081 by 2046. The structure is 65 ft (19.8 m) long and 43 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

Open in Google Maps
CarriesIl 40 FAP 646
CrossesDitch # 4
Location3 Mi. N. of I-80
RouteState Highway 40
CountyBureau County
StateIllinois
Coordinates41.43239, -89.68474
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable 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 rating91.8 US tons
Inventory rating55 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length65 ft (19.8 m)
Longest span63 ft (19.1 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,400 (2023)
Projected traffic3,081 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 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 40 FAP 646 over Ditch # 4 built?

It was built in 1993, making it 32 years old in 2025.

What condition is Il 40 FAP 646 over Ditch # 4 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 February 2021.

How much traffic does Il 40 FAP 646 over Ditch # 4 carry?

About 2,400 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is Il 40 FAP 646 over Ditch # 4?

The structure is 65 ft (19.8 m) long with a longest span of 63 ft (19.1 m) and a deck 43 ft wide.

Who owns Il 40 FAP 646 over Ditch # 4?

It is owned by the State Highway Agency.