US Bridges

CH-9 over Little Bonpas Creek

Fair

Wabash County, Illinois · 1.5 MI NW Lancaster · Structure no. 093301000000000

Built
1939
86 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
76 ft
2 main spans
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

CH-9 over Little Bonpas Creek is a steel continuous stringer/multi-beam or girder carrying CH-9 over Little Bonpas Creek in Wabash County, Illinois. It was built in 1939, so it is 86 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 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 100 vehicles a day, roughly 18% of them trucks, projected to reach 101 by 2046. The structure is 76 ft (23.2 m) long and 21 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesCH-9
CrossesLittle Bonpas Creek
Location1.5 MI NW Lancaster
RouteCounty Highway 0
Coordinates38.55908, -87.8985
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating47.8 US tons
Inventory rating31.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length76 ft (23.2 m)
Longest span38 ft (11.6 m)
Deck width21 ft (6.4 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic101 by 2046
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$240,000
NavigationNo navigation control on waterway

Frequently asked questions

When was CH-9 over Little Bonpas Creek built?

It was built in 1939, making it 86 years old in 2025.

What condition is CH-9 over Little Bonpas Creek 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 2025.

How much traffic does CH-9 over Little Bonpas Creek carry?

About 100 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is CH-9 over Little Bonpas Creek?

The structure is 76 ft (23.2 m) long with a longest span of 38 ft (11.6 m) and a deck 21 ft wide.

Who owns CH-9 over Little Bonpas Creek?

It is owned by the County Highway Agency.