US Bridges

Mt Sterling RD over Trib of Third CR

Fair

Gasconade County, Missouri · S 4 T 42 N R 6 W · Structure no. 14522

Built
1967
58 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete Continuous
Length
32 ft
2 main spans
Daily traffic
40
2024 count
Owner
County
County Highway Agency

About this bridge

Mt Sterling RD over Trib of Third CR is a concrete continuous culvert carrying Mt Sterling RD over Trib of Third CR in Gasconade County, Missouri. It was built in 1967, so it is 58 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 40 vehicles a day, roughly 10% of them trucks, projected to reach 48 by 2044. The structure is 32 ft (9.8 m) long and 21 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesMt Sterling RD
CrossesTrib of Third CR
LocationS 4 T 42 N R 6 W
RouteCounty Highway 69
Coordinates38.42275, -91.59836
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
ScourCountermeasures installed to correct a previously existing problem
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 alignment6: Equal to present minimum criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length32 ft (9.8 m)
Longest span16 ft (4.9 m)
Deck width21 ft (6.4 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2024)
Projected traffic48 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Third CR built?

It was built in 1967, making it 58 years old in 2025.

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

About 40 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Mt Sterling RD over Trib of Third CR?

The structure is 32 ft (9.8 m) long with a longest span of 16 ft (4.9 m) and a deck 21 ft wide.

Who owns Mt Sterling RD over Trib of Third CR?

It is owned by the County Highway Agency.