US Bridges

Ill 97 over Little Haw CR

Good

Knox County, Illinois · 4 MI NW of Maquon · Structure no. 048009700000000

Built
2016
9 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
77 ft
1 main span
Daily traffic
1,800
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 97 over Little Haw CR is a steel stringer/multi-beam or girder carrying Ill 97 over Little Haw CR in Knox County, Illinois. It was built in 2016, so it is 9 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 1,800 vehicles a day, roughly 17% of them trucks, projected to reach 1,768 by 2046. The structure is 77 ft (23.6 m) long and 35 ft wide. If it were closed, the detour would be 26.7 mi (43 km).

CarriesIll 97
CrossesLittle Haw CR
Location4 MI NW of Maquon
RouteState Highway 97
Coordinates40.84664, -90.20158
Functional classRural Minor 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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.2 US tons
Inventory rating59.6 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length77 ft (23.6 m)
Longest span74 ft (22.6 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2023)
Projected traffic1,768 by 2046
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.7 mi (43 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 Ill 97 over Little Haw CR built?

It was built in 2016, making it 9 years old in 2025.

What condition is Ill 97 over Little Haw CR 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 October 2023.

How much traffic does Ill 97 over Little Haw CR carry?

About 1,800 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is Ill 97 over Little Haw CR?

The structure is 77 ft (23.6 m) long with a longest span of 74 ft (22.6 m) and a deck 35 ft wide.

Who owns Ill 97 over Little Haw CR?

It is owned by the State Highway Agency.