US Bridges

392nd Avenue over Mud Creek

PoorPosted for load

Spink County, South Dakota · 3.4W 1.8N Brentford · Structure no. 000000058160042

Built
1935
90 years old, rebuilt 1965
Condition
Poor
inspected September 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
36 ft
1 main span
Daily traffic
44
2022 count
Owner
County
County Highway Agency

About this bridge

392nd Avenue over Mud Creek is a concrete stringer/multi-beam or girder carrying 392nd Avenue over Mud Creek in Spink County, South Dakota. It was built in 1935 and reconstructed in 1965, 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 44 vehicles a day, roughly 2% of them trucks, projected to reach 44 by 2032. The structure is 36 ft (11 m) long and 32 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Carries392nd Avenue
CrossesMud Creek
Location3.4W 1.8N Brentford
RouteCounty Highway 0
Coordinates45.18136, -98.38965
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.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 12 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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating18 US tons
Inventory rating13.4 US tons

Structure

MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length36 ft (11 m)
Longest span35 ft (10.7 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44 (2022)
Projected traffic44 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$1.4 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 392nd Avenue over Mud Creek built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1965.

What condition is 392nd Avenue over Mud 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 September 2024.

How much traffic does 392nd Avenue over Mud Creek carry?

About 44 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 392nd Avenue over Mud Creek?

The structure is 36 ft (11 m) long with a longest span of 35 ft (10.7 m) and a deck 32 ft wide.

Who owns 392nd Avenue over Mud Creek?

It is owned by the County Highway Agency.