US Bridges

265 ST over South Fork Platte Creek

Good

Aurora County, South Dakota · 13S 3.5E White Lake · Structure no. 000000002075270

Built
1941
84 years old
Condition
Good
inspected July 2023
Type
Culvert
Concrete
Length
31 ft
3 main spans
Daily traffic
40
2022 count
Owner
County
County Highway Agency

About this bridge

265 ST over South Fork Platte Creek is a concrete culvert carrying 265 ST over South Fork Platte Creek in Aurora County, South Dakota. It was built in 1941, so it is 84 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 40 vehicles a day, roughly 3% of them trucks, projected to reach 40 by 2032. The structure is 31 ft (9.4 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries265 ST
CrossesSouth Fork Platte Creek
Location13S 3.5E White Lake
RouteCounty Highway 0
Coordinates43.54174, -98.64831
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating44.1 US tons
Inventory rating26.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span10 ft (3 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2022)
Projected traffic40 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 265 ST over South Fork Platte Creek built?

It was built in 1941, making it 84 years old in 2025.

What condition is 265 ST over South Fork Platte Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does 265 ST over South Fork Platte Creek carry?

About 40 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 265 ST over South Fork Platte Creek?

The structure is 31 ft (9.4 m) long with a longest span of 10 ft (3 m) and a deck 26 ft wide.

Who owns 265 ST over South Fork Platte Creek?

It is owned by the County Highway Agency.