US Bridges

Old US 50 over Lake Branch

Fair

Clinton County, Illinois · 1.2 M E Aviston · Structure no. 014003100000000

Built
1922
103 years old, rebuilt 1958
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
104 ft
4 main spans
Daily traffic
4,650
2020 count
Owner
State
State Highway Agency

About this bridge

Old US 50 over Lake Branch is a concrete continuous slab carrying Old US 50 over Lake Branch in Clinton County, Illinois. It was built in 1922 and reconstructed in 1958, so it is 103 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 4,650 vehicles a day, roughly 9% of them trucks, projected to reach 5,115 by 2046. The structure is 104 ft (31.7 m) long and 36 ft wide. If it were closed, the detour would be 42.3 mi (68 km).

Location

Open in Google Maps
CarriesOld US 50
CrossesLake Branch
Location1.2 M E Aviston
RouteCounty Highway 0
CountyClinton County
StateIllinois
Coordinates38.61213, -89.58555
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.3 US tons
Inventory rating33.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length104 ft (31.7 m)
Longest span31 ft (9.4 m)
Deck width36 ft (11.1 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,650 (2020)
Projected traffic5,115 by 2046
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed42.3 mi (68 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$292,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Old US 50 over Lake Branch built?

It was built in 1922, making it 103 years old in 2025. It was reconstructed in 1958.

What condition is Old US 50 over Lake Branch 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 September 2024.

How much traffic does Old US 50 over Lake Branch carry?

About 4,650 vehicles per day (2020 count), of which roughly 9% are trucks.

How long is Old US 50 over Lake Branch?

The structure is 104 ft (31.7 m) long with a longest span of 31 ft (9.4 m) and a deck 36 ft wide.

Who owns Old US 50 over Lake Branch?

It is owned by the State Highway Agency.