US Bridges

County RD 360 over Mill CR

Poor

Reynolds County, Missouri · S 14 T 32 N R 2 E · Structure no. 15026

Built
1921
104 years old
Condition
Poor
inspected January 2025
Type
Slab
Concrete
Length
65 ft
3 main spans
Daily traffic
30
2024 count
Owner
County
County Highway Agency

About this bridge

County RD 360 over Mill CR is a concrete slab carrying County RD 360 over Mill CR in Reynolds County, Missouri. It was built in 1921, so it is 104 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 30 vehicles a day, roughly 10% of them trucks, projected to reach 36 by 2044. The structure is 65 ft (19.8 m) long and 21 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesCounty RD 360
CrossesMill CR
LocationS 14 T 32 N R 2 E
RouteCounty Highway 82
Coordinates37.4549, -90.807
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionJanuary 2025
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
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 typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadOther
Structure length65 ft (19.8 m)
Longest span21 ft (6.4 m)
Deck width21 ft (6.5 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2024)
Projected traffic36 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$494,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 360 over Mill CR built?

It was built in 1921, making it 104 years old in 2025.

What condition is County RD 360 over Mill CR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2025.

How much traffic does County RD 360 over Mill CR carry?

About 30 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD 360 over Mill CR?

The structure is 65 ft (19.8 m) long with a longest span of 21 ft (6.4 m) and a deck 21 ft wide.

Who owns County RD 360 over Mill CR?

It is owned by the County Highway Agency.