US Bridges

412th Avenue over Middle Pearl Creek

PoorClosed to traffic

Beadle County, South Dakota · 5.1S & 3E of Cavour · Structure no. 000000003360231

Built
1930
95 years old
Condition
Poor
inspected July 2017
Type
Stringer/Multi-beam or Girder
Steel
Length
29 ft
1 main span
Daily traffic
56
2022 count
Owner
County
County Highway Agency

About this bridge

412th Avenue over Middle Pearl Creek is a steel stringer/multi-beam or girder carrying 412th Avenue over Middle Pearl Creek in Beadle County, South Dakota. It was built in 1930, so it is 95 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 0 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: closed to all traffic.

It carries about 56 vehicles a day, roughly 2% of them trucks, projected to reach 56 by 2032. The structure is 29 ft (8.8 m) long and 18 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Carries412th Avenue
CrossesMiddle Pearl Creek
Location5.1S & 3E of Cavour
Coordinates44.29628, -97.97347
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure0 FailedOut of service and beyond corrective action.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2017
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourUnknown foundation; not evaluated for scour
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating0 US tons
Inventory rating0 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span26 ft (7.9 m)
Deck width18 ft (5.5 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic56 (2022)
Projected traffic56 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$491,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 412th Avenue over Middle Pearl Creek built?

It was built in 1930, making it 95 years old in 2025.

What condition is 412th Avenue over Middle Pearl 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 July 2017.

How much traffic does 412th Avenue over Middle Pearl Creek carry?

About 56 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 412th Avenue over Middle Pearl Creek?

The structure is 29 ft (8.8 m) long with a longest span of 26 ft (7.9 m) and a deck 18 ft wide.

Who owns 412th Avenue over Middle Pearl Creek?

It is owned by the County Highway Agency.