US Bridges

315 Avenue over Mud Ck

FairPosted for load

Tripp County, South Dakota · 0.6W & 4.3S Winner · Structure no. 000000062190319

Built
1958
67 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete Continuous
Length
93 ft
3 main spans
Daily traffic
375
2022 count
Owner
County
County Highway Agency

About this bridge

315 Avenue over Mud Ck is a concrete continuous slab carrying 315 Avenue over Mud Ck in Tripp County, South Dakota. It was built in 1958, so it is 67 years old, older than the South Dakota average of 48.9 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. Its operating status is: posted for load restriction.

It carries about 375 vehicles a day, roughly 3% of them trucks, projected to reach 375 by 2032. The structure is 93 ft (28.3 m) long and 34 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Carries315 Avenue
CrossesMud Ck
Location0.6W & 4.3S Winner
RouteCounty Highway 0
Coordinates43.31555, -99.87017
Functional classRural Major Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating37.1 US tons
Inventory rating22.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length93 ft (28.3 m)
Longest span35 ft (10.7 m)
Deck width34 ft (10.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic375 (2022)
Projected traffic375 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 315 Avenue over Mud Ck built?

It was built in 1958, making it 67 years old in 2025.

What condition is 315 Avenue over Mud Ck 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 June 2023.

How much traffic does 315 Avenue over Mud Ck carry?

About 375 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 315 Avenue over Mud Ck?

The structure is 93 ft (28.3 m) long with a longest span of 35 ft (10.7 m) and a deck 34 ft wide.

Who owns 315 Avenue over Mud Ck?

It is owned by the County Highway Agency.