US Bridges

County RD 408 over Otter CR

Fair

Shelby County, Missouri · S 5 T 56 N R 12 W · Structure no. 22786

Built
1989
36 years old
Condition
Fair
inspected March 2024
Type
Culvert
Steel
Length
29 ft
3 main spans
Daily traffic
35
2024 count
Owner
County
County Highway Agency

About this bridge

County RD 408 over Otter CR is a steel culvert carrying County RD 408 over Otter CR in Shelby County, Missouri. It was built in 1989, so it is 36 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 35 vehicles a day, roughly 10% of them trucks, projected to reach 44 by 2044. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCounty RD 408
CrossesOtter CR
LocationS 5 T 56 N R 12 W
RouteCounty Highway 374
CountyShelby County
StateMissouri
Coordinates39.67811, -92.269
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 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
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadOther
Structure length29 ft (8.8 m)
Longest span7 ft (2.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2024)
Projected traffic44 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 County RD 408 over Otter CR built?

It was built in 1989, making it 36 years old in 2025.

What condition is County RD 408 over Otter 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 2024.

How much traffic does County RD 408 over Otter CR carry?

About 35 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD 408 over Otter CR?

The structure is 29 ft (8.8 m) long with a longest span of 7 ft (2.2 m).

Who owns County RD 408 over Otter CR?

It is owned by the County Highway Agency.