US Bridges

SW Alamo RD over Plum CR

Fair

Caldwell County, Missouri · S 31 T 56 N R 29 W · Structure no. 23193

Built
1979
46 years old, rebuilt 2011
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
24 ft
1 main span
Daily traffic
35
2024 count
Owner
County
County Highway Agency

About this bridge

SW Alamo RD over Plum CR is a steel stringer/multi-beam or girder carrying SW Alamo RD over Plum CR in Caldwell County, Missouri. It was built in 1979 and reconstructed in 2011, so it is 46 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 5 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 40 by 2044. The structure is 24 ft (7.3 m) long and 14 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesSW Alamo RD
CrossesPlum CR
LocationS 31 T 56 N R 29 W
RouteCounty Highway 395
CountyCaldwell County
StateMissouri
Coordinates39.61786, -94.20484
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
Deck9 ExcellentNo problems noted.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.7 US tons
Inventory rating19.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 10
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width14 ft (4.3 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2024)
Projected traffic40 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 SW Alamo RD over Plum CR built?

It was built in 1979, making it 46 years old in 2025. It was reconstructed in 2011.

What condition is SW Alamo RD over Plum 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 October 2023.

How much traffic does SW Alamo RD over Plum CR carry?

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

How long is SW Alamo RD over Plum CR?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m) and a deck 14 ft wide.

Who owns SW Alamo RD over Plum CR?

It is owned by the County Highway Agency.