US Bridges

County RD 220 over Mill CR

FairPosted for load

Hickory County, Missouri · S 31 T 37 N R 21 W · Structure no. 15171

Built
1900
125 years old
Condition
Fair
inspected February 2025
Type
Slab
Concrete Continuous
Length
56 ft
5 main spans
Daily traffic
60
2025 count
Owner
County
County Highway Agency

About this bridge

County RD 220 over Mill CR is a concrete continuous slab carrying County RD 220 over Mill CR in Hickory County, Missouri. It was built in 1900, so it is 125 years old, older 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 60 vehicles a day, roughly 10% of them trucks, projected to reach 72 by 2045. The structure is 56 ft (17.1 m) long and 21 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesCounty RD 220
CrossesMill CR
LocationS 31 T 37 N R 21 W
RouteCounty Highway 87
CountyHickory County
StateMissouri
Coordinates37.90626, -93.27755
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating9.9 US tons
Inventory rating6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadOther
Structure length56 ft (17.1 m)
Longest span11 ft (3.4 m)
Deck width21 ft (6.5 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2025)
Projected traffic72 by 2045
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$438,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 220 over Mill CR built?

It was built in 1900, making it 125 years old in 2025.

What condition is County RD 220 over Mill 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 February 2025.

How much traffic does County RD 220 over Mill CR carry?

About 60 vehicles per day (2025 count), of which roughly 10% are trucks.

How long is County RD 220 over Mill CR?

The structure is 56 ft (17.1 m) long with a longest span of 11 ft (3.4 m) and a deck 21 ft wide.

Who owns County RD 220 over Mill CR?

It is owned by the County Highway Agency.