US Bridges

479th Avenue over Spring Creek

Fair

Lincoln County, South Dakota · 2.3N & 3E of Harrisburg · Structure no. 000000042150027

Built
1999
26 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
45
2022 count
Owner
County
County Highway Agency

About this bridge

479th Avenue over Spring Creek is a concrete continuous culvert carrying 479th Avenue over Spring Creek in Lincoln County, South Dakota. It was built in 1999, so it is 26 years old, younger 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 45 vehicles a day, roughly 2% of them trucks, projected to reach 45 by 2032. The structure is 22 ft (6.6 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Carries479th Avenue
CrossesSpring Creek
Location2.3N & 3E of Harrisburg
RouteCounty Highway 0
Coordinates43.46475, -96.62894
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
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 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
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating106.5 US tons
Inventory rating82.2 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length22 ft (6.6 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45 (2022)
Projected traffic45 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 479th Avenue over Spring Creek built?

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

What condition is 479th Avenue over Spring 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 479th Avenue over Spring Creek carry?

About 45 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 479th Avenue over Spring Creek?

The structure is 22 ft (6.6 m) long with a longest span of 9 ft (2.7 m).

Who owns 479th Avenue over Spring Creek?

It is owned by the County Highway Agency.