US Bridges

Ill 71 over Morgan Creek

Good

Kendall County, Illinois · 2.20 MI NE of Il 126 · Structure no. 047005900000000

Built
1997
28 years old
Condition
Good
inspected January 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
89 ft
1 main span
Daily traffic
11,700
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 71 over Morgan Creek is a prestressed concrete stringer/multi-beam or girder carrying Ill 71 over Morgan Creek in Kendall County, Illinois. It was built in 1997, so it is 28 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 11,700 vehicles a day, roughly 10% of them trucks, projected to reach 13,832 by 2046. The structure is 89 ft (27 m) long and 43 ft wide.

Location

Open in Google Maps
CarriesIll 71
CrossesMorgan Creek
Location2.20 MI NE of Il 126
RouteState Highway 71
CountyKendall County
StateIllinois
Coordinates41.64919, -88.40151
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum 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 rating76.8 US tons
Inventory rating43.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length89 ft (27 m)
Longest span89 ft (27 m)
Deck width43 ft (13 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,700 (2023)
Projected traffic13,832 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes

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 Ill 71 over Morgan Creek built?

It was built in 1997, making it 28 years old in 2025.

What condition is Ill 71 over Morgan Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2022.

How much traffic does Ill 71 over Morgan Creek carry?

About 11,700 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Ill 71 over Morgan Creek?

The structure is 89 ft (27 m) long with a longest span of 89 ft (27 m) and a deck 43 ft wide.

Who owns Ill 71 over Morgan Creek?

It is owned by the State Highway Agency.