US Bridges

NW County Line RD over Castile CR

Good

Clinton County, Missouri · S 16 T 55 N R 33 W · Structure no. 21611

Built
1989
36 years old
Condition
Good
inspected December 2024
Type
Tee Beam
Prestressed Concrete
Length
153 ft
3 main spans
Daily traffic
70
2023 count
Owner
County
County Highway Agency

About this bridge

NW County Line RD over Castile CR is a prestressed concrete tee beam carrying NW County Line RD over Castile CR in Clinton County, Missouri. It was built in 1989, so it is 36 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 70 vehicles a day, roughly 10% of them trucks, projected to reach 81 by 2043. The structure is 153 ft (46.6 m) long and 27 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesNW County Line RD
CrossesCastile CR
LocationS 16 T 55 N R 33 W
RouteCounty Highway 314
CountyClinton County
StateMissouri
Coordinates39.58443, -94.60121
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length153 ft (46.6 m)
Longest span50 ft (15.2 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70 (2023)
Projected traffic81 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 County Line RD over Castile CR built?

It was built in 1989, making it 36 years old in 2025.

What condition is NW County Line RD over Castile CR 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 NW County Line RD over Castile CR carry?

About 70 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is NW County Line RD over Castile CR?

The structure is 153 ft (46.6 m) long with a longest span of 50 ft (15.2 m) and a deck 27 ft wide.

Who owns NW County Line RD over Castile CR?

It is owned by the County Highway Agency.