US Bridges

County RD 621 over Linn CR

Good

Osage County, Missouri · S 18 T 43 N R 8 W · Structure no. 15288

Built
1997
28 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete
Length
25 ft
2 main spans
Daily traffic
100
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 621 over Linn CR is a concrete culvert carrying County RD 621 over Linn CR in Osage County, Missouri. It was built in 1997, so it is 28 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 140 by 2043. The structure is 25 ft (7.6 m) long and 33 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesCounty RD 621
CrossesLinn CR
LocationS 18 T 43 N R 8 W
RouteCounty Highway 90
CountyOsage County
StateMissouri
Coordinates38.48211, -91.85114
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.
Culvert7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.3 US tons
Inventory rating48.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span11 ft (3.4 m)
Deck width33 ft (10.1 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic140 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 County RD 621 over Linn CR built?

It was built in 1997, making it 28 years old in 2025.

What condition is County RD 621 over Linn 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 April 2023.

How much traffic does County RD 621 over Linn CR carry?

About 100 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD 621 over Linn CR?

The structure is 25 ft (7.6 m) long with a longest span of 11 ft (3.4 m) and a deck 33 ft wide.

Who owns County RD 621 over Linn CR?

It is owned by the County Highway Agency.