US Bridges

Ch 68 Lenzburg Eas over Branch of Mud Creek

Fair

St. Clair County, Illinois · 0.1MI West Ill RTE 4 · Structure no. 082304500000000

Built
1972
53 years old, rebuilt 2005
Condition
Fair
inspected March 2024
Type
Channel Beam
Concrete
Length
70 ft
2 main spans
Daily traffic
250
2023 count
Owner
County
County Highway Agency

About this bridge

Ch 68 Lenzburg Eas over Branch of Mud Creek is a concrete channel beam carrying Ch 68 Lenzburg Eas over Branch of Mud Creek in St. Clair County, Illinois. It was built in 1972 and reconstructed in 2005, so it is 53 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 250 vehicles a day, roughly 9% of them trucks, projected to reach 354 by 2046. The structure is 70 ft (21.3 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesCh 68 Lenzburg Eas
CrossesBranch of Mud Creek
Location0.1MI West Ill RTE 4
RouteCounty Highway 0
Coordinates38.29359, -89.72383
Functional classRural Local

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.
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.9 US tons
Inventory rating29.3 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span34 ft (10.4 m)
Deck width30 ft (9.2 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2023)
Projected traffic354 by 2046
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedDeck replacement with only incidental widening
Estimated improvement cost$112,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Ch 68 Lenzburg Eas over Branch of Mud Creek built?

It was built in 1972, making it 53 years old in 2025. It was reconstructed in 2005.

What condition is Ch 68 Lenzburg Eas over Branch of Mud 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 March 2024.

How much traffic does Ch 68 Lenzburg Eas over Branch of Mud Creek carry?

About 250 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Ch 68 Lenzburg Eas over Branch of Mud Creek?

The structure is 70 ft (21.3 m) long with a longest span of 34 ft (10.4 m) and a deck 30 ft wide.

Who owns Ch 68 Lenzburg Eas over Branch of Mud Creek?

It is owned by the County Highway Agency.