US Bridges

Ll ROAD/TR121 over Richland Creek

Good

Monroe County, Illinois · 5 Mi. SE of Hecker · Structure no. 067310900000000

Built
1981
44 years old
Condition
Good
inspected February 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
120 ft
2 main spans
Daily traffic
350
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Ll ROAD/TR121 over Richland Creek is a prestressed concrete box beam or girders - multiple carrying Ll ROAD/TR121 over Richland Creek in Monroe County, Illinois. It was built in 1981, so it is 44 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 350 vehicles a day, roughly 23% of them trucks, projected to reach 283 by 2046. The structure is 120 ft (36.6 m) long and 24 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesLl ROAD/TR121
CrossesRichland Creek
Location5 Mi. SE of Hecker
RouteCounty Highway 0
CountyMonroe County
StateIllinois
Coordinates38.25193, -89.95949
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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span72 ft (21.9 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2024)
Projected traffic283 by 2046
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Ll ROAD/TR121 over Richland Creek built?

It was built in 1981, making it 44 years old in 2025.

What condition is Ll ROAD/TR121 over Richland Creek 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 February 2022.

How much traffic does Ll ROAD/TR121 over Richland Creek carry?

About 350 vehicles per day (2024 count), of which roughly 23% are trucks.

How long is Ll ROAD/TR121 over Richland Creek?

The structure is 120 ft (36.6 m) long with a longest span of 72 ft (21.9 m) and a deck 24 ft wide.

Who owns Ll ROAD/TR121 over Richland Creek?

It is owned by the Town or Township Highway Agency.