US Bridges

TR 158 over Tomahawk Creek

Poor

LaSalle County, Illinois · E 9th N 3960 · Structure no. 050501600000000

Built
1975
50 years old
Condition
Poor
inspected June 2024
Type
Culvert
Steel
Length
29 ft
2 main spans
Daily traffic
25
2016 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 158 over Tomahawk Creek is a steel culvert carrying TR 158 over Tomahawk Creek in LaSalle County, Illinois. It was built in 1975, so it is 50 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 25 vehicles a day, roughly 40% of them trucks, projected to reach 25 by 2046. The structure is 29 ft (8.9 m) long and 30 ft wide.

Location

Open in Google Maps
CarriesTR 158
CrossesTomahawk Creek
LocationE 9th N 3960
RouteCounty Highway 0
CountyLaSalle County
StateIllinois
Coordinates41.50573, -88.99339
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating60 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 15
Structure length29 ft (8.9 m)
Longest span12 ft (3.7 m)
Deck width30 ft (9.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2016)
Projected traffic25 by 2046
Trucks40%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was TR 158 over Tomahawk Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is TR 158 over Tomahawk Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does TR 158 over Tomahawk Creek carry?

About 25 vehicles per day (2016 count), of which roughly 40% are trucks.

How long is TR 158 over Tomahawk Creek?

The structure is 29 ft (8.9 m) long with a longest span of 12 ft (3.7 m) and a deck 30 ft wide.

Who owns TR 158 over Tomahawk Creek?

It is owned by the Town or Township Highway Agency.