US Bridges

Mo 21 S over Clay Lick Hollow

Fair

Reynolds County, Missouri · S 14 T 32 N R 2 E · Structure no. 5508

Built
1932
93 years old
Condition
Fair
inspected November 2024
Type
Culvert
Concrete Continuous
Length
38 ft
3 main spans
Daily traffic
864
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 21 S over Clay Lick Hollow is a concrete continuous culvert carrying Mo 21 S over Clay Lick Hollow in Reynolds 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 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 864 vehicles a day, roughly 18% of them trucks, projected to reach 1,296 by 2044. The structure is 38 ft (11.6 m) long and 32 ft wide. If it were closed, the detour would be 46 mi (74 km).

Location

Open in Google Maps
CarriesMo 21 S
CrossesClay Lick Hollow
LocationS 14 T 32 N R 2 E
RouteState Highway 21
CountyReynolds County
StateMissouri
Coordinates37.4547, -90.80451
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 protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating88.3 US tons
Inventory rating52.6 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 15
Structure length38 ft (11.6 m)
Longest span12 ft (3.7 m)
Deck width32 ft (9.9 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic864 (2024)
Projected traffic1,296 by 2044
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed46 mi (74 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 21 S over Clay Lick Hollow built?

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

What condition is Mo 21 S over Clay Lick Hollow 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 November 2024.

How much traffic does Mo 21 S over Clay Lick Hollow carry?

About 864 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is Mo 21 S over Clay Lick Hollow?

The structure is 38 ft (11.6 m) long with a longest span of 12 ft (3.7 m) and a deck 32 ft wide.

Who owns Mo 21 S over Clay Lick Hollow?

It is owned by the State Highway Agency.