US Bridges

Il 70 over Drainage Ditch

Fair

Winnebago County, Illinois · .1 MI N Summerdale · Structure no. 101009000000000

Built
1962
63 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
33 ft
1 main span
Daily traffic
5,000
2023 count
Owner
State
State Highway Agency

About this bridge

Il 70 over Drainage Ditch is a steel stringer/multi-beam or girder carrying Il 70 over Drainage Ditch in Winnebago County, Illinois. It was built in 1962, so it is 63 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 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 5,000 vehicles a day, roughly 6% of them trucks, projected to reach 5,151 by 2046. The structure is 33 ft (10.1 m) long and 69 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesIl 70
CrossesDrainage Ditch
Location.1 MI N Summerdale
RouteState Highway 70
CountyWinnebago County
StateIllinois
Coordinates42.29957, -89.10859
Functional classUrban 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.5 US tons
Inventory rating39.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span31 ft (9.4 m)
Deck width69 ft (21.1 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2023)
Projected traffic5,151 by 2046
Trucks6%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 Il 70 over Drainage Ditch built?

It was built in 1962, making it 63 years old in 2025.

What condition is Il 70 over Drainage Ditch 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 May 2023.

How much traffic does Il 70 over Drainage Ditch carry?

About 5,000 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Il 70 over Drainage Ditch?

The structure is 33 ft (10.1 m) long with a longest span of 31 ft (9.4 m) and a deck 69 ft wide.

Who owns Il 70 over Drainage Ditch?

It is owned by the State Highway Agency.