US Bridges

County RD 556 over Br of Shady CR

Fair

Audrain County, Missouri · S 10 T 52 N R 5 W · Structure no. 31692

Built
2006
19 years old
Condition
Fair
inspected March 2023
Type
Channel Beam
Concrete
Length
43 ft
1 main span
Daily traffic
100
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 556 over Br of Shady CR is a concrete channel beam carrying County RD 556 over Br of Shady CR in Audrain County, Missouri. It was built in 2006, so it is 19 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 125 by 2043. The structure is 43 ft (13 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCounty RD 556
CrossesBr of Shady CR
LocationS 10 T 52 N R 5 W
RouteCounty Highway 520
CountyAudrain County
StateMissouri
Coordinates39.29014, -91.45261
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure9 ExcellentNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.5 US tons
Inventory rating36.7 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20 + Mod
Structure length43 ft (13 m)
Longest span40 ft (12.2 m)
Deck width26 ft (7.8 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic125 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 556 over Br of Shady CR built?

It was built in 2006, making it 19 years old in 2025.

What condition is County RD 556 over Br of Shady 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 March 2023.

How much traffic does County RD 556 over Br of Shady CR carry?

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

How long is County RD 556 over Br of Shady CR?

The structure is 43 ft (13 m) long with a longest span of 40 ft (12.2 m) and a deck 26 ft wide.

Who owns County RD 556 over Br of Shady CR?

It is owned by the County Highway Agency.