US Bridges

County RD 521 over Wilkinson Dtch

Fair

Mississippi County, Missouri · S 33 T 24 N R 15 E · Structure no. 34480

Built
2014
11 years old
Condition
Fair
inspected December 2023
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
150 ft
3 main spans
Daily traffic
15
2024 count
Owner
County
County Highway Agency

About this bridge

County RD 521 over Wilkinson Dtch is a concrete continuous box beam or girders - single or spread carrying County RD 521 over Wilkinson Dtch in Mississippi County, Missouri. It was built in 2014, so it is 11 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 15 vehicles a day, roughly 10% of them trucks, projected to reach 19 by 2044. The structure is 150 ft (45.7 m) long and 24 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCounty RD 521
CrossesWilkinson Dtch
LocationS 33 T 24 N R 15 E
RouteCounty Highway 95
CountyMississippi County
StateMissouri
Coordinates36.67389, -89.32806
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.3 US tons
Inventory rating48.6 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length150 ft (45.7 m)
Longest span78 ft (23.8 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2024)
Projected traffic19 by 2044
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 County RD 521 over Wilkinson Dtch built?

It was built in 2014, making it 11 years old in 2025.

What condition is County RD 521 over Wilkinson Dtch 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 2023.

How much traffic does County RD 521 over Wilkinson Dtch carry?

About 15 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD 521 over Wilkinson Dtch?

The structure is 150 ft (45.7 m) long with a longest span of 78 ft (23.8 m) and a deck 24 ft wide.

Who owns County RD 521 over Wilkinson Dtch?

It is owned by the County Highway Agency.