US Bridges

NW 305th ST over Horse CR

Fair

Clinton County, Missouri · S 19 T 56 N R 31 W · Structure no. 31659

Built
2004
21 years old
Condition
Fair
inspected December 2024
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
20
2023 count
Owner
County
County Highway Agency

About this bridge

NW 305th ST over Horse CR is a concrete continuous culvert carrying NW 305th ST over Horse CR in Clinton County, Missouri. It was built in 2004, so it is 21 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 6 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 20 vehicles a day, roughly 10% of them trucks, projected to reach 23 by 2043. The structure is 21 ft (6.3 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesNW 305th ST
CrossesHorse CR
LocationS 19 T 56 N R 31 W
RouteCounty Highway 363
CountyClinton County
StateMissouri
Coordinates39.64876, -94.42169
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.
Culvert6 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 evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.5 US tons
Inventory rating36.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length21 ft (6.3 m)
Longest span10 ft (3 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2023)
Projected traffic23 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was NW 305th ST over Horse CR built?

It was built in 2004, making it 21 years old in 2025.

What condition is NW 305th ST over Horse 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 305th ST over Horse CR carry?

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

How long is NW 305th ST over Horse CR?

The structure is 21 ft (6.3 m) long with a longest span of 10 ft (3 m) and a deck 26 ft wide.

Who owns NW 305th ST over Horse CR?

It is owned by the County Highway Agency.