US Bridges

484th Avenue over Trib. to Finnie Creek

Poor

Lincoln County, South Dakota · 3.5W & 2.7S of Hudson · Structure no. 000000042200287

Built
1941
84 years old
Condition
Poor
inspected June 2023
Type
Culvert
Concrete Continuous
Length
32 ft
3 main spans
Daily traffic
50
2022 count
Owner
County
County Highway Agency

About this bridge

484th Avenue over Trib. to Finnie Creek is a concrete continuous culvert carrying 484th Avenue over Trib. to Finnie Creek in Lincoln 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 50 vehicles a day, roughly 2% of them trucks, projected to reach 50 by 2036. The structure is 32 ft (9.7 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries484th Avenue
CrossesTrib. to Finnie Creek
Location3.5W & 2.7S of Hudson
RouteCounty Highway 0
CountyLincoln County
StateSouth Dakota
Coordinates43.08756, -96.52943
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadUnknown
Structure length32 ft (9.7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic50 by 2036
Trucks2%
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 statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$929,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 484th Avenue over Trib. to Finnie Creek built?

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

What condition is 484th Avenue over Trib. to Finnie Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2023.

How much traffic does 484th Avenue over Trib. to Finnie Creek carry?

About 50 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 484th Avenue over Trib. to Finnie Creek?

The structure is 32 ft (9.7 m) long with a longest span of 10 ft (3 m).

Who owns 484th Avenue over Trib. to Finnie Creek?

It is owned by the County Highway Agency.