US Bridges

County RD 263 over Mill CR

Fair

Oregon County, Missouri · S 34 T 22 N R 3 W · Structure no. 17577

Built
2000
25 years old
Condition
Fair
inspected January 2024
Type
Slab
Concrete Continuous
Length
53 ft
3 main spans
Daily traffic
70
2024 count
Owner
County
County Highway Agency

About this bridge

County RD 263 over Mill CR is a concrete continuous slab carrying County RD 263 over Mill CR in Oregon County, Missouri. It was built in 2000, so it is 25 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 70 vehicles a day, roughly 10% of them trucks, projected to reach 84 by 2044. The structure is 53 ft (16.2 m) long and 22 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCounty RD 263
CrossesMill CR
LocationS 34 T 22 N R 3 W
RouteCounty Highway 156
CountyOregon County
StateMissouri
Coordinates36.514, -91.281
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length53 ft (16.2 m)
Longest span15 ft (4.6 m)
Deck width22 ft (6.8 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70 (2024)
Projected traffic84 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 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 263 over Mill CR built?

It was built in 2000, making it 25 years old in 2025.

What condition is County RD 263 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 January 2024.

How much traffic does County RD 263 over Mill CR carry?

About 70 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD 263 over Mill CR?

The structure is 53 ft (16.2 m) long with a longest span of 15 ft (4.6 m) and a deck 22 ft wide.

Who owns County RD 263 over Mill CR?

It is owned by the County Highway Agency.