County RD 308 over Sinking CR

FairPosted for load

Reynolds County, Missouri · S 35 T 31 N R 1 E · Structure no. 18200

Built: 1999; 26 years old, rebuilt 2010
Condition: Fair; inspected January 2025
Type: Slab; Concrete Continuous
Length: 63 ft; 9 main spans
Daily traffic: 30; 2024 count
Owner: County; County Highway Agency

About this bridge

County RD 308 over Sinking CR is a concrete continuous slab carrying County RD 308 over Sinking CR in Reynolds County, Missouri. It was built in 1999 and reconstructed in 2010, so it is 26 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. Its operating status is: posted for load restriction.

It carries about 30 vehicles a day, roughly 10% of them trucks, projected to reach 36 by 2044. The structure is 63 ft (19.2 m) long and 12 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesCounty RD 308

CrossesSinking CR

LocationS 35 T 31 N R 1 E

RouteCounty Highway 176

CountyReynolds County

StateMissouri

Coordinates37.32845, -90.92122

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.

Component	Rating	Meaning
Deck	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.

Last inspectionJanuary 2025

Inspection intervalevery 12 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 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 alignment6: Equal to present minimum criteria

Operating rating6 US tons

Inventory rating3 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans9

Design loadHS 20

Structure length63 ft (19.2 m)

Longest span7 ft (2.2 m)

Deck width12 ft (3.6 m)

Roadway width10 ft (3.1 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2024)

Projected traffic36 by 2044

Trucks10%

Lanes on structure1

Traffic directionOne-lane bridge for two-way traffic

CarriesHighway

CrossesWaterway

Detour if closed6.2 mi (10 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$494,000 (2025 estimate)

NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 308 over Sinking CR built?

It was built in 1999, making it 26 years old in 2025. It was reconstructed in 2010.

What condition is County RD 308 over Sinking 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 2025.

How much traffic does County RD 308 over Sinking CR carry?

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

How long is County RD 308 over Sinking CR?

The structure is 63 ft (19.2 m) long with a longest span of 7 ft (2.2 m) and a deck 12 ft wide.

Who owns County RD 308 over Sinking CR?

It is owned by the County Highway Agency.