US Bridges

TR 90 Frogtown RD over US 50

Good

Clinton County, Illinois · 6 MI W of Carlyle · Structure no. 014005500000000

Built
1974
51 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
275 ft
2 main spans
Daily traffic
75
2020 count
Owner
State
State Highway Agency

About this bridge

TR 90 Frogtown RD over US 50 is a steel continuous stringer/multi-beam or girder carrying TR 90 Frogtown RD over US 50 in Clinton County, Illinois. It was built in 1974, so it is 51 years old, older 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 75 vehicles a day, roughly 11% of them trucks, projected to reach 83 by 2046. The structure is 275 ft (83.8 m) long and 30 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesTR 90 Frogtown RD
CrossesUS 50
Location6 MI W of Carlyle
RouteCounty Highway 0
Coordinates38.62371, -89.47926
Functional classRural Local

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.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating47.8 US tons
Inventory rating30.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 15
Structure length275 ft (83.8 m)
Longest span131 ft (39.9 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2020)
Projected traffic83 by 2046
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was TR 90 Frogtown RD over US 50 built?

It was built in 1974, making it 51 years old in 2025.

What condition is TR 90 Frogtown RD over US 50 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 July 2023.

How much traffic does TR 90 Frogtown RD over US 50 carry?

About 75 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is TR 90 Frogtown RD over US 50?

The structure is 275 ft (83.8 m) long with a longest span of 131 ft (39.9 m) and a deck 30 ft wide.

Who owns TR 90 Frogtown RD over US 50?

It is owned by the State Highway Agency.