US Bridges

463rd Avenue over Creek

PoorPosted for load

Roberts County, South Dakota · 4W & 3S of Wilmot · Structure no. 000000055140391

Built
1929
96 years old, rebuilt 1964
Condition
Poor
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
35 ft
1 main span
Daily traffic
30
2022 count
Owner
County
County Highway Agency

About this bridge

463rd Avenue over Creek is a steel stringer/multi-beam or girder carrying 463rd Avenue over Creek in Roberts County, South Dakota. It was built in 1929 and reconstructed in 1964, so it is 96 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 30 vehicles a day, roughly 2% of them trucks, projected to reach 30 by 2032. The structure is 35 ft (10.7 m) long and 33 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Carries463rd Avenue
CrossesCreek
Location4W & 3S of Wilmot
RouteCounty Highway 0
Coordinates45.36822, -96.94421
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry8: Equal to present desirable criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating16.5 US tons
Inventory rating9.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length35 ft (10.7 m)
Longest span23 ft (7 m)
Deck width33 ft (10.2 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2022)
Projected traffic30 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$929,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 463rd Avenue over Creek built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1964.

What condition is 463rd Avenue over 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 2024.

How much traffic does 463rd Avenue over Creek carry?

About 30 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 463rd Avenue over Creek?

The structure is 35 ft (10.7 m) long with a longest span of 23 ft (7 m) and a deck 33 ft wide.

Who owns 463rd Avenue over Creek?

It is owned by the County Highway Agency.