US Bridges

Clellie Harmon RD over Bass Creek

Good

Boone County, Missouri · S 10 T 46 N R 12 W · Structure no. 34420

Built
2012
13 years old
Condition
Good
inspected December 2024
Type
Culvert
Steel
Length
22 ft
3 main spans
Daily traffic
20
2023 count
Owner
County
County Highway Agency

About this bridge

Clellie Harmon RD over Bass Creek is a steel culvert carrying Clellie Harmon RD over Bass Creek in Boone County, Missouri. It was built in 2012, so it is 13 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 20 vehicles a day, roughly 10% of them trucks, projected to reach 38 by 2043. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesClellie Harmon RD
CrossesBass Creek
LocationS 10 T 46 N R 12 W
RouteCounty Highway 429
Coordinates38.78433, -92.26333
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert8 Very GoodNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2023)
Projected traffic38 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Clellie Harmon RD over Bass Creek built?

It was built in 2012, making it 13 years old in 2025.

What condition is Clellie Harmon RD over Bass Creek 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 Clellie Harmon RD over Bass Creek carry?

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

How long is Clellie Harmon RD over Bass Creek?

The structure is 22 ft (6.7 m) long with a longest span of 6 ft (1.8 m).

Who owns Clellie Harmon RD over Bass Creek?

It is owned by the County Highway Agency.