US Bridges

431st Avenue over Wolf Creek

Fair

McCook County, South Dakota · 6.6N of Spencer · Structure no. 000000044010014

Built
1972
53 years old
Condition
Fair
inspected June 2024
Type
Channel Beam
Concrete
Length
31 ft
2 main spans
Daily traffic
20
2022 count
Owner
County
County Highway Agency

About this bridge

431st Avenue over Wolf Creek is a concrete channel beam carrying 431st Avenue over Wolf Creek in McCook County, South Dakota. It was built in 1972, so it is 53 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 5 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 20 vehicles a day, roughly 2% of them trucks, projected to reach 20 by 2032. The structure is 31 ft (9.4 m) long and 27 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
Carries431st Avenue
CrossesWolf Creek
Location6.6N of Spencer
RouteCounty Highway 0
CountyMcCook County
StateSouth Dakota
Coordinates43.82548, -97.58945
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
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 rating36 US tons
Inventory rating27 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadUnknown
Structure length31 ft (9.4 m)
Longest span30 ft (9.1 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2022)
Projected traffic20 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 431st Avenue over Wolf Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is 431st Avenue over Wolf Creek 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 2024.

How much traffic does 431st Avenue over Wolf Creek carry?

About 20 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 431st Avenue over Wolf Creek?

The structure is 31 ft (9.4 m) long with a longest span of 30 ft (9.1 m) and a deck 27 ft wide.

Who owns 431st Avenue over Wolf Creek?

It is owned by the County Highway Agency.