US Bridges

Mo 111 S over Rock CR

Fair

Atchison County, Missouri · S 16 T 64 N R 41 W · Structure no. 2362

Built
1973
52 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
253 ft
5 main spans
Daily traffic
226
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 111 S over Rock CR is a steel continuous stringer/multi-beam or girder carrying Mo 111 S over Rock CR in Atchison County, Missouri. It was built in 1973, so it is 52 years old, older 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 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 226 vehicles a day, roughly 12% of them trucks, projected to reach 294 by 2044. The structure is 253 ft (77.1 m) long and 32 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

Open in Google Maps
CarriesMo 111 S
CrossesRock CR
LocationS 16 T 64 N R 41 W
RouteState Highway 111
CountyAtchison County
StateMissouri
Coordinates40.36381, -95.52691
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.7 US tons
Inventory rating23.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length253 ft (77.1 m)
Longest span55 ft (16.8 m)
Deck width32 ft (9.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic226 (2024)
Projected traffic294 by 2044
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 111 S over Rock CR built?

It was built in 1973, making it 52 years old in 2025.

What condition is Mo 111 S over Rock 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 September 2023.

How much traffic does Mo 111 S over Rock CR carry?

About 226 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is Mo 111 S over Rock CR?

The structure is 253 ft (77.1 m) long with a longest span of 55 ft (16.8 m) and a deck 32 ft wide.

Who owns Mo 111 S over Rock CR?

It is owned by the State Highway Agency.