US Bridges

NW 348th RD over Castile CR

Poor

Clinton County, Missouri · S 27 T 57 N R 32 W · Structure no. 13066

Built
1975
50 years old
Condition
Poor
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
132 ft
1 main span
Daily traffic
20
2023 count
Owner
County
County Highway Agency

About this bridge

NW 348th RD over Castile CR is a steel stringer/multi-beam or girder carrying NW 348th RD over Castile CR in Clinton County, Missouri. It was built in 1975, so it is 50 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 20 vehicles a day, roughly 10% of them trucks, projected to reach 23 by 2043. The structure is 132 ft (40.2 m) long and 19 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesNW 348th RD
CrossesCastile CR
LocationS 27 T 57 N R 32 W
RouteCounty Highway 28
CountyClinton County
StateMissouri
Coordinates39.72554, -94.4874
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionDecember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.7 US tons
Inventory rating18.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+3 approach)
Design loadOther
Structure length132 ft (40.2 m)
Longest span50 ft (15.2 m)
Deck width19 ft (5.9 m)
Roadway width18 ft (5.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2023)
Projected traffic23 by 2043
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$910,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was NW 348th RD over Castile CR built?

It was built in 1975, making it 50 years old in 2025.

What condition is NW 348th RD over Castile CR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.

How much traffic does NW 348th RD over Castile CR carry?

About 20 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is NW 348th RD over Castile CR?

The structure is 132 ft (40.2 m) long with a longest span of 50 ft (15.2 m) and a deck 19 ft wide.

Who owns NW 348th RD over Castile CR?

It is owned by the County Highway Agency.