US Bridges

Rt M S over Snail CR

Poor

Johnson County, Missouri · S 33 T 47 N R 27 W · Structure no. 6168

Built
1947
78 years old
Condition
Poor
inspected December 2024
Type
Culvert
Concrete
Length
20 ft
1 main span
Daily traffic
552
2024 count
Owner
State
State Highway Agency

About this bridge

Rt M S over Snail CR is a concrete culvert carrying Rt M S over Snail CR in Johnson County, Missouri. It was built in 1947, so it is 78 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 552 vehicles a day, roughly 9% of them trucks, projected to reach 856 by 2044. The structure is 20 ft (6.1 m) long and 30 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

Open in Google Maps
CarriesRt M S
CrossesSnail CR
LocationS 33 T 47 N R 27 W
RouteState Highway 0M
CountyJohnson County
StateMissouri
Coordinates38.83639, -93.90654
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Culvert3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionDecember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.3 US tons
Inventory rating49.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 15
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic552 (2024)
Projected traffic856 by 2044
Trucks9%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$306,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rt M S over Snail CR built?

It was built in 1947, making it 78 years old in 2025.

What condition is Rt M S over Snail CR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.

How much traffic does Rt M S over Snail CR carry?

About 552 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is Rt M S over Snail CR?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 30 ft wide.

Who owns Rt M S over Snail CR?

It is owned by the State Highway Agency.