US Bridges

Shockley RD over Trib of Cedar CR

Fair

Gasconade County, Missouri · S 14 T 42 N R 6 W · Structure no. 16079

Built
1950
75 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete
Length
23 ft
1 main span
Daily traffic
51
2024 count
Owner
County
County Highway Agency

About this bridge

Shockley RD over Trib of Cedar CR is a concrete culvert carrying Shockley RD over Trib of Cedar CR in Gasconade County, Missouri. It was built in 1950, so it is 75 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 51 vehicles a day, roughly 10% of them trucks, projected to reach 61 by 2044. The structure is 23 ft (7 m) long and 20 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesShockley RD
CrossesTrib of Cedar CR
LocationS 14 T 42 N R 6 W
RouteCounty Highway 109
CountyGasconade County
StateMissouri
Coordinates38.38447, -91.57161
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
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length23 ft (7 m)
Longest span22 ft (6.7 m)
Deck width20 ft (6 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic51 (2024)
Projected traffic61 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$153,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Shockley RD over Trib of Cedar CR built?

It was built in 1950, making it 75 years old in 2025.

What condition is Shockley RD over Trib of Cedar 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 Shockley RD over Trib of Cedar CR carry?

About 51 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Shockley RD over Trib of Cedar CR?

The structure is 23 ft (7 m) long with a longest span of 22 ft (6.7 m) and a deck 20 ft wide.

Who owns Shockley RD over Trib of Cedar CR?

It is owned by the County Highway Agency.