US Bridges

TR 406 over Gun Creek

Fair

Jefferson County, Illinois · 1.5 MI SE Spring Gar · Structure no. 041369100000000

Built
1999
26 years old
Condition
Fair
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
69 ft
1 main span
Daily traffic
100
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 406 over Gun Creek is a prestressed concrete box beam or girders - multiple carrying TR 406 over Gun Creek in Jefferson County, Illinois. It was built in 1999, so it is 26 years old, younger 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 100 vehicles a day, roughly 35% of them trucks, projected to reach 101 by 2046. The structure is 69 ft (20.9 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesTR 406
CrossesGun Creek
Location1.5 MI SE Spring Gar
RouteCounty Highway 0
CountyJefferson County
StateIllinois
Coordinates38.14457, -88.83397
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 alignment8: Equal to present desirable criteria
Operating rating97.9 US tons
Inventory rating63.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length69 ft (20.9 m)
Longest span66 ft (20.1 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2021)
Projected traffic101 by 2046
Trucks35%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was TR 406 over Gun Creek built?

It was built in 1999, making it 26 years old in 2025.

What condition is TR 406 over Gun 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 July 2024.

How much traffic does TR 406 over Gun Creek carry?

About 100 vehicles per day (2021 count), of which roughly 35% are trucks.

How long is TR 406 over Gun Creek?

The structure is 69 ft (20.9 m) long with a longest span of 66 ft (20.1 m) and a deck 24 ft wide.

Who owns TR 406 over Gun Creek?

It is owned by the Town or Township Highway Agency.