US Bridges

366 Ave over Wolf Ck

PoorPosted for load

Hand County, South Dakota · 6 E & 8.4 N Miller · Structure no. 000000030220166

Built
1915
110 years old
Condition
Poor
inspected August 2023
Type
Truss - Thru
Steel
Length
41 ft
1 main span
Daily traffic
10
2022 count
Owner
County
County Highway Agency

About this bridge

366 Ave over Wolf Ck is a steel truss - thru carrying 366 Ave over Wolf Ck in Hand County, South Dakota. It was built in 1915, so it is 110 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 10 vehicles a day, roughly 2% of them trucks, projected to reach 10 by 2032. The structure is 41 ft (12.5 m) long and 16 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries366 Ave
CrossesWolf Ck
Location6 E & 8.4 N Miller
RouteCounty Highway 0
Coordinates44.65471, -98.86652
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
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 geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating8.4 US tons
Inventory rating5 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length41 ft (12.5 m)
Longest span40 ft (12.2 m)
Deck width16 ft (4.8 m)
Roadway width15 ft (4.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2022)
Projected traffic10 by 2032
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 statusEligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$378,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 366 Ave over Wolf Ck built?

It was built in 1915, making it 110 years old in 2025.

What condition is 366 Ave over Wolf Ck 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 August 2023.

How much traffic does 366 Ave over Wolf Ck carry?

About 10 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 366 Ave over Wolf Ck?

The structure is 41 ft (12.5 m) long with a longest span of 40 ft (12.2 m) and a deck 16 ft wide.

Who owns 366 Ave over Wolf Ck?

It is owned by the County Highway Agency.