US Bridges

Mt Pleasant RD over Trib of Bourbeuse

Fair

Gasconade County, Missouri · S 25 T 40 N R 6 W · Structure no. 18980

Built
1939
86 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete
Length
23 ft
1 main span
Daily traffic
25
2024 count
Owner
County
County Highway Agency

About this bridge

Mt Pleasant RD over Trib of Bourbeuse is a concrete slab carrying Mt Pleasant RD over Trib of Bourbeuse in Gasconade County, Missouri. It was built in 1939, so it is 86 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 25 vehicles a day, roughly 10% of them trucks, projected to reach 30 by 2044. The structure is 23 ft (7 m) long and 19 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesMt Pleasant RD
CrossesTrib of Bourbeuse
LocationS 25 T 40 N R 6 W
RouteCounty Highway 206
CountyGasconade County
StateMissouri
Coordinates38.17614, -91.54483
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 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 geometry3: Basically intolerable, requiring high priority of corrective action
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 typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length23 ft (7 m)
Longest span22 ft (6.7 m)
Deck width19 ft (5.7 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2024)
Projected traffic30 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$162,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mt Pleasant RD over Trib of Bourbeuse built?

It was built in 1939, making it 86 years old in 2025.

What condition is Mt Pleasant RD over Trib of Bourbeuse 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 Pleasant RD over Trib of Bourbeuse carry?

About 25 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Mt Pleasant RD over Trib of Bourbeuse?

The structure is 23 ft (7 m) long with a longest span of 22 ft (6.7 m) and a deck 19 ft wide.

Who owns Mt Pleasant RD over Trib of Bourbeuse?

It is owned by the County Highway Agency.