US Bridges

TR 204 Greenhouse over Running Slough Trib

Good

Gallatin County, Illinois · 1 MI SW of New Haven · Structure no. 030311400000000

Built
2002
23 years old
Condition
Good
inspected November 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
52 ft
1 main span
Daily traffic
50
2023 count
Owner
County
County Highway Agency

About this bridge

TR 204 Greenhouse over Running Slough Trib is a prestressed concrete box beam or girders - multiple carrying TR 204 Greenhouse over Running Slough Trib in Gallatin County, Illinois. It was built in 2002, so it is 23 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 50 vehicles a day, roughly 44% of them trucks, projected to reach 76 by 2046. The structure is 52 ft (15.7 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesTR 204 Greenhouse
CrossesRunning Slough Trib
Location1 MI SW of New Haven
RouteCounty Highway 0
Coordinates37.88691, -88.14557
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20 + Mod
Structure length52 ft (15.7 m)
Longest span50 ft (15.2 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic76 by 2046
Trucks44%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 204 Greenhouse over Running Slough Trib built?

It was built in 2002, making it 23 years old in 2025.

What condition is TR 204 Greenhouse over Running Slough Trib in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.

How much traffic does TR 204 Greenhouse over Running Slough Trib carry?

About 50 vehicles per day (2023 count), of which roughly 44% are trucks.

How long is TR 204 Greenhouse over Running Slough Trib?

The structure is 52 ft (15.7 m) long with a longest span of 50 ft (15.2 m) and a deck 24 ft wide.

Who owns TR 204 Greenhouse over Running Slough Trib?

It is owned by the County Highway Agency.