US Bridges

120th ST over Shoal CR

Fair

Putnam County, Missouri · S 32 T 67 N R 17 W · Structure no. 18309

Built
1997
28 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
70 ft
1 main span
Daily traffic
20
2024 count
Owner
County
County Highway Agency

About this bridge

120th ST over Shoal CR is a steel stringer/multi-beam or girder carrying 120th ST over Shoal CR in Putnam County, Missouri. It was built in 1997, so it is 28 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 20 vehicles a day, roughly 10% of them trucks, projected to reach 22 by 2044. The structure is 70 ft (21.3 m) long and 18 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
Carries120th ST
CrossesShoal CR
LocationS 32 T 67 N R 17 W
RouteCounty Highway 181
CountyPutnam County
StateMissouri
Coordinates40.55934, -92.84048
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating76.4 US tons
Inventory rating45.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span68 ft (20.7 m)
Deck width18 ft (5.5 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2024)
Projected traffic22 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 120th ST over Shoal CR built?

It was built in 1997, making it 28 years old in 2025.

What condition is 120th ST over Shoal CR 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 March 2023.

How much traffic does 120th ST over Shoal CR carry?

About 20 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is 120th ST over Shoal CR?

The structure is 70 ft (21.3 m) long with a longest span of 68 ft (20.7 m) and a deck 18 ft wide.

Who owns 120th ST over Shoal CR?

It is owned by the County Highway Agency.