US Bridges

County RD #501 over Mill CR

Fair

Madison County, Missouri · S 25 T 33 N R 6 E · Structure no. 13619

Built
1981
44 years old
Condition
Fair
inspected December 2023
Type
Culvert
Concrete
Length
47 ft
5 main spans
Daily traffic
35
2024 count
Owner
County
County Highway Agency

About this bridge

County RD #501 over Mill CR is a concrete culvert carrying County RD #501 over Mill CR in Madison County, Missouri. It was built in 1981, so it is 44 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 5 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 35 vehicles a day, roughly 10% of them trucks, projected to reach 46 by 2044. The structure is 47 ft (14.3 m) long and 19 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCounty RD #501
CrossesMill CR
LocationS 25 T 33 N R 6 E
RouteCounty Highway 43
CountyMadison County
StateMissouri
Coordinates37.52667, -90.31333
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadOther
Structure length47 ft (14.3 m)
Longest span9 ft (2.7 m)
Deck width19 ft (5.8 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2024)
Projected traffic46 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 #501 over Mill CR built?

It was built in 1981, making it 44 years old in 2025.

What condition is County RD #501 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 December 2023.

How much traffic does County RD #501 over Mill CR carry?

About 35 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD #501 over Mill CR?

The structure is 47 ft (14.3 m) long with a longest span of 9 ft (2.7 m) and a deck 19 ft wide.

Who owns County RD #501 over Mill CR?

It is owned by the County Highway Agency.