US Bridges

NW 284th ST over Br of Castile CR

Fair

Clinton County, Missouri · S 2 T 55 N R 33 W · Structure no. 21807

Built
1990
35 years old
Condition
Fair
inspected December 2024
Type
Culvert
Steel
Length
21 ft
2 main spans
Daily traffic
30
2023 count
Owner
County
County Highway Agency

About this bridge

NW 284th ST over Br of Castile CR is a steel culvert carrying NW 284th ST over Br of Castile CR in Clinton County, Missouri. It was built in 1990, so it is 35 years old, younger 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 30 vehicles a day, roughly 10% of them trucks, projected to reach 35 by 2043. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNW 284th ST
CrossesBr of Castile CR
LocationS 2 T 55 N R 33 W
RouteCounty Highway 324
CountyClinton County
StateMissouri
Coordinates39.60896, -94.57027
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 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 within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2023)
Projected traffic35 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 NW 284th ST over Br of Castile CR built?

It was built in 1990, making it 35 years old in 2025.

What condition is NW 284th ST over Br of Castile 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 December 2024.

How much traffic does NW 284th ST over Br of Castile CR carry?

About 30 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is NW 284th ST over Br of Castile CR?

The structure is 21 ft (6.4 m) long with a longest span of 9 ft (2.7 m).

Who owns NW 284th ST over Br of Castile CR?

It is owned by the County Highway Agency.