US Bridges

TR 121 over Mdl Fk Shoal Ck

Fair

Montgomery County, Illinois · 7.0 MI W Coalton · Structure no. 068322800000000

Built
1976
49 years old
Condition
Fair
inspected November 2024
Type
Channel Beam
Concrete
Length
76 ft
2 main spans
Daily traffic
50
2020 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 121 over Mdl Fk Shoal Ck is a concrete channel beam carrying TR 121 over Mdl Fk Shoal Ck in Montgomery County, Illinois. It was built in 1976, so it is 49 years old, older 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 50 vehicles a day, roughly 6% of them trucks, projected to reach 51 by 2046. The structure is 76 ft (23.2 m) long and 23 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesTR 121
CrossesMdl Fk Shoal Ck
Location7.0 MI W Coalton
RouteCounty Highway 0
CountyMontgomery County
StateIllinois
Coordinates39.29037, -89.43788
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length76 ft (23.2 m)
Longest span37 ft (11.3 m)
Deck width23 ft (6.9 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2020)
Projected traffic51 by 2046
Trucks6%
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

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 121 over Mdl Fk Shoal Ck built?

It was built in 1976, making it 49 years old in 2025.

What condition is TR 121 over Mdl Fk Shoal Ck 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 November 2024.

How much traffic does TR 121 over Mdl Fk Shoal Ck carry?

About 50 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is TR 121 over Mdl Fk Shoal Ck?

The structure is 76 ft (23.2 m) long with a longest span of 37 ft (11.3 m) and a deck 23 ft wide.

Who owns TR 121 over Mdl Fk Shoal Ck?

It is owned by the Town or Township Highway Agency.