US Bridges

County RD 521 over Deer CR

Good

Osage County, Missouri · S 13 T 42 N R 10 W · Structure no. 30883

Built
2005
20 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete Continuous
Length
45 ft
2 main spans
Daily traffic
10
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 521 over Deer CR is a concrete continuous culvert carrying County RD 521 over Deer CR in Osage County, Missouri. It was built in 2005, so it is 20 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 10 vehicles a day, roughly 10% of them trucks, projected to reach 14 by 2043. The structure is 45 ft (13.8 m) long. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesCounty RD 521
CrossesDeer CR
LocationS 13 T 42 N R 10 W
RouteCounty Highway 521
CountyOsage County
StateMissouri
Coordinates38.38895, -91.98164
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 inspectionApril 2023
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 alignment6: Equal to present minimum criteria
Operating rating71.4 US tons
Inventory rating42.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length45 ft (13.8 m)
Longest span22 ft (6.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2023)
Projected traffic14 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 521 over Deer CR built?

It was built in 2005, making it 20 years old in 2025.

What condition is County RD 521 over Deer 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 521 over Deer CR carry?

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

How long is County RD 521 over Deer CR?

The structure is 45 ft (13.8 m) long with a longest span of 22 ft (6.7 m).

Who owns County RD 521 over Deer CR?

It is owned by the County Highway Agency.