US Bridges

Mo 49 S over Rock CR

Fair

Crawford County, Missouri · S 26 T 36 N R 3 W · Structure no. 8694

Built
1932
93 years old
Condition
Fair
inspected May 2024
Type
Culvert
Concrete Continuous
Length
38 ft
3 main spans
Daily traffic
1,014
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 49 S over Rock CR is a concrete continuous culvert carrying Mo 49 S over Rock CR in Crawford County, Missouri. It was built in 1932, so it is 93 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 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 1,014 vehicles a day, roughly 10% of them trucks, projected to reach 1,521 by 2044. The structure is 38 ft (11.5 m) long and 34 ft wide. If it were closed, the detour would be 52.2 mi (84 km).

CarriesMo 49 S
CrossesRock CR
LocationS 26 T 36 N R 3 W
RouteState Highway 49
Coordinates37.80776, -91.22259
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51.6 US tons
Inventory rating30.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 10
Structure length38 ft (11.5 m)
Longest span12 ft (3.7 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,014 (2024)
Projected traffic1,521 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed52.2 mi (84 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 49 S over Rock CR built?

It was built in 1932, making it 93 years old in 2025.

What condition is Mo 49 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 May 2024.

How much traffic does Mo 49 S over Rock CR carry?

About 1,014 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Mo 49 S over Rock CR?

The structure is 38 ft (11.5 m) long with a longest span of 12 ft (3.7 m) and a deck 34 ft wide.

Who owns Mo 49 S over Rock CR?

It is owned by the State Highway Agency.