US Bridges

Mt Pleasant RD over Small Str

Good

Boone County, Missouri · S 15 T 45 N R 12 W · Structure no. 23218

Built
1982
43 years old
Condition
Good
inspected December 2024
Type
Tee Beam
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
55
2023 count
Owner
County
County Highway Agency

About this bridge

Mt Pleasant RD over Small Str is a prestressed concrete tee beam carrying Mt Pleasant RD over Small Str in Boone County, Missouri. It was built in 1982, so it is 43 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 55 vehicles a day, roughly 10% of them trucks, projected to reach 105 by 2043. The structure is 41 ft (12.5 m) long and 23 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesMt Pleasant RD
CrossesSmall Str
LocationS 15 T 45 N R 12 W
RouteCounty Highway 396
Coordinates38.67303, -92.25708
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating34.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length41 ft (12.5 m)
Longest span40 ft (12.2 m)
Deck width23 ft (6.9 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55 (2023)
Projected traffic105 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Pleasant RD over Small Str built?

It was built in 1982, making it 43 years old in 2025.

What condition is Mt Pleasant RD over Small Str in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2024.

How much traffic does Mt Pleasant RD over Small Str carry?

About 55 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Mt Pleasant RD over Small Str?

The structure is 41 ft (12.5 m) long with a longest span of 40 ft (12.2 m) and a deck 23 ft wide.

Who owns Mt Pleasant RD over Small Str?

It is owned by the County Highway Agency.