US Bridges

Mo 49 S over S Rock Br

Fair

Crawford County, Missouri · S 13 T 35 N R 3 W · Structure no. 3140

Built
1978
47 years old
Condition
Fair
inspected May 2024
Type
Culvert
Concrete Continuous
Length
45 ft
3 main spans
Daily traffic
1,133
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 49 S over S Rock Br is a concrete continuous culvert carrying Mo 49 S over S Rock Br in Crawford County, Missouri. It was built in 1978, so it is 47 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 1,133 vehicles a day, roughly 10% of them trucks, projected to reach 1,700 by 2044. The structure is 45 ft (13.6 m) long and 54 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesMo 49 S
CrossesS Rock Br
LocationS 13 T 35 N R 3 W
RouteState Highway 49
CountyCrawford County
StateMissouri
Coordinates37.75539, -91.21025
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
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 geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating98.2 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 20
Structure length45 ft (13.6 m)
Longest span10 ft (3 m)
Deck width54 ft (16.6 m)
Roadway width52 ft (15.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,133 (2024)
Projected traffic1,700 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 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 S Rock Br built?

It was built in 1978, making it 47 years old in 2025.

What condition is Mo 49 S over S Rock Br 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 S Rock Br carry?

About 1,133 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Mo 49 S over S Rock Br?

The structure is 45 ft (13.6 m) long with a longest span of 10 ft (3 m) and a deck 54 ft wide.

Who owns Mo 49 S over S Rock Br?

It is owned by the State Highway Agency.