US Bridges

County RD 8270 over Mustion CR

Fair

Howell County, Missouri · S 32 T 24 N R 8 W · Structure no. 24880

Built
1952
73 years old
Condition
Fair
inspected November 2024
Type
Slab
Concrete Continuous
Length
27 ft
2 main spans
Daily traffic
250
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 8270 over Mustion CR is a concrete continuous slab carrying County RD 8270 over Mustion CR in Howell County, Missouri. It was built in 1952, so it is 73 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 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 250 vehicles a day, roughly 10% of them trucks, projected to reach 325 by 2043. The structure is 27 ft (8.2 m) long and 16 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCounty RD 8270
CrossesMustion CR
LocationS 32 T 24 N R 8 W
RouteCounty Highway 569
CountyHowell County
StateMissouri
Coordinates36.7053, -91.8602
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 protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
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 typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length27 ft (8.2 m)
Longest span13 ft (4 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2023)
Projected traffic325 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$185,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 8270 over Mustion CR built?

It was built in 1952, making it 73 years old in 2025.

What condition is County RD 8270 over Mustion 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 November 2024.

How much traffic does County RD 8270 over Mustion CR carry?

About 250 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD 8270 over Mustion CR?

The structure is 27 ft (8.2 m) long with a longest span of 13 ft (4 m) and a deck 16 ft wide.

Who owns County RD 8270 over Mustion CR?

It is owned by the County Highway Agency.