US Bridges

TR 350 over Lake Creek

Fair

Williamson County, Illinois · .5 MI S Johnston Cty · Structure no. 100310000000000

Built
1978
47 years old
Condition
Fair
inspected February 2024
Type
Channel Beam
Concrete
Length
116 ft
3 main spans
Daily traffic
325
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 350 over Lake Creek is a concrete channel beam carrying TR 350 over Lake Creek in Williamson County, Illinois. It was built in 1978, so it is 47 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 325 vehicles a day, roughly 19% of them trucks, projected to reach 328 by 2046. The structure is 116 ft (35.4 m) long and 22 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesTR 350
CrossesLake Creek
Location.5 MI S Johnston Cty
RouteCounty Highway 0
CountyWilliamson County
StateIllinois
Coordinates37.80792, -88.92809
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 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 geometry4: Meets minimum tolerable limits to be left in place as is
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 spans3
Design loadHS 20
Structure length116 ft (35.4 m)
Longest span38 ft (11.6 m)
Deck width22 ft (6.8 m)
Roadway width21 ft (6.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic325 (2021)
Projected traffic328 by 2046
Trucks19%
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

OwnerTown or Township Highway Agency
Maintained byTown or Township 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$286,000
NavigationNo navigation control on waterway

Frequently asked questions

When was TR 350 over Lake Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is TR 350 over Lake 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 2024.

How much traffic does TR 350 over Lake Creek carry?

About 325 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is TR 350 over Lake Creek?

The structure is 116 ft (35.4 m) long with a longest span of 38 ft (11.6 m) and a deck 22 ft wide.

Who owns TR 350 over Lake Creek?

It is owned by the Town or Township Highway Agency.