US Bridges

Hanson Avenue over Mitchell Ck

FairPosted for load

Haakon County, South Dakota · 6.2 W & 7.9 N Midland · Structure no. 000000028360391

Built
1986
39 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
66 ft
3 main spans
Daily traffic
28
2022 count
Owner
County
County Highway Agency

About this bridge

Hanson Avenue over Mitchell Ck is a wood or timber stringer/multi-beam or girder carrying Hanson Avenue over Mitchell Ck in Haakon County, South Dakota. It was built in 1986, so it is 39 years old, younger than the South Dakota average of 48.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 28 vehicles a day, roughly 2% of them trucks, projected to reach 28 by 2032. The structure is 66 ft (20.1 m) long and 18 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

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CarriesHanson Avenue
CrossesMitchell Ck
Location6.2 W & 7.9 N Midland
RouteCounty Highway 0
CountyHaakon County
StateSouth Dakota
Coordinates44.18144, -101.28673
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionSeptember 2024
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating23.1 US tons
Inventory rating16.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadUnknown
Structure length66 ft (20.1 m)
Longest span22 ft (6.7 m)
Deck width18 ft (5.6 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28 (2022)
Projected traffic28 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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$175,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Hanson Avenue over Mitchell Ck built?

It was built in 1986, making it 39 years old in 2025.

What condition is Hanson Avenue over Mitchell Ck in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.

How much traffic does Hanson Avenue over Mitchell Ck carry?

About 28 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Hanson Avenue over Mitchell Ck?

The structure is 66 ft (20.1 m) long with a longest span of 22 ft (6.7 m) and a deck 18 ft wide.

Who owns Hanson Avenue over Mitchell Ck?

It is owned by the County Highway Agency.