US Bridges

484th Avenue over Trib. to Pattee Creek

PoorPosted for load

Lincoln County, South Dakota · 3.5W & 1.1N of Hudson · Structure no. 000000042200249

Built
1935
90 years old, rebuilt 1970
Condition
Poor
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
36 ft
1 main span
Daily traffic
50
2022 count
Owner
County
County Highway Agency

About this bridge

484th Avenue over Trib. to Pattee Creek is a steel stringer/multi-beam or girder carrying 484th Avenue over Trib. to Pattee Creek in Lincoln County, South Dakota. It was built in 1935 and reconstructed in 1970, so it is 90 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. Its operating status is: posted for load restriction.

It carries about 50 vehicles a day, roughly 2% of them trucks, projected to reach 50 by 2032. The structure is 36 ft (11.1 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries484th Avenue
CrossesTrib. to Pattee Creek
Location3.5W & 1.1N of Hudson
RouteCounty Highway 0
Coordinates43.14307, -96.52956
Functional classRural Local

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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
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
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.3 US tons
Inventory rating16.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length36 ft (11.1 m)
Longest span30 ft (9.1 m)
Deck width27 ft (8.1 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic50 by 2032
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$812,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

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

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1970.

What condition is 484th Avenue over Trib. to Pattee 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 Pattee Creek carry?

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

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

The structure is 36 ft (11.1 m) long with a longest span of 30 ft (9.1 m) and a deck 27 ft wide.

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

It is owned by the County Highway Agency.