US Bridges

Mt Sterling RD over Trib of Pin Oak CR

Fair

Gasconade County, Missouri · S 20 T 43 N R 6 W · Structure no. 14491

Built
1965
60 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete
Length
23 ft
1 main span
Daily traffic
35
2024 count
Owner
County
County Highway Agency

About this bridge

Mt Sterling RD over Trib of Pin Oak CR is a concrete culvert carrying Mt Sterling RD over Trib of Pin Oak CR in Gasconade County, Missouri. It was built in 1965, so it is 60 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 35 vehicles a day, roughly 10% of them trucks, projected to reach 42 by 2044. The structure is 23 ft (7 m) long and 23 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMt Sterling RD
CrossesTrib of Pin Oak CR
LocationS 20 T 43 N R 6 W
RouteCounty Highway 69
CountyGasconade County
StateMissouri
Coordinates38.46003, -91.62581
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
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 width23 ft (6.9 m)
Roadway width21 ft (6.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2024)
Projected traffic42 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Mt Sterling RD over Trib of Pin Oak CR built?

It was built in 1965, making it 60 years old in 2025.

What condition is Mt Sterling RD over Trib of Pin Oak 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 Mt Sterling RD over Trib of Pin Oak CR carry?

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

How long is Mt Sterling RD over Trib of Pin Oak CR?

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

Who owns Mt Sterling RD over Trib of Pin Oak CR?

It is owned by the County Highway Agency.