US Bridges

TR129 over Skunk Creek

Poor

Mercer County, Illinois · CTR-4-T14NR2W · Structure no. 066307400000000

Built
1975
50 years old
Condition
Poor
inspected September 2024
Type
Culvert
Steel
Length
31 ft
3 main spans
Daily traffic
75
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR129 over Skunk Creek is a steel culvert carrying TR129 over Skunk Creek in Mercer 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 4 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 75 vehicles a day, roughly 27% of them trucks, projected to reach 51 by 2046. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesTR129
CrossesSkunk Creek
LocationCTR-4-T14NR2W
RouteCounty Highway 0
CountyMercer County
StateIllinois
Coordinates41.23452, -90.61322
Functional classRural Minor Collector

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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: 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 rating98.2 US tons
Inventory rating98.2 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 15
Structure length31 ft (9.4 m)
Longest span9 ft (2.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2024)
Projected traffic51 by 2046
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$72,000
NavigationNo navigation control on waterway

Frequently asked questions

When was TR129 over Skunk Creek built?

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

What condition is TR129 over Skunk 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 September 2024.

How much traffic does TR129 over Skunk Creek carry?

About 75 vehicles per day (2024 count), of which roughly 27% are trucks.

How long is TR129 over Skunk Creek?

The structure is 31 ft (9.4 m) long with a longest span of 9 ft (2.6 m).

Who owns TR129 over Skunk Creek?

It is owned by the Town or Township Highway Agency.