US Bridges

352 Avenue over Willow Ck

PoorPosted for load

Gregory County, South Dakota · 5.2S & 2E Herrick · Structure no. 000000027200322

Built
1956
69 years old
Condition
Poor
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
208 ft
4 main spans
Daily traffic
36
2022 count
Owner
County
County Highway Agency

About this bridge

352 Avenue over Willow Ck is a steel continuous stringer/multi-beam or girder carrying 352 Avenue over Willow Ck in Gregory County, South Dakota. It was built in 1956, so it is 69 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 36 vehicles a day, roughly 2% of them trucks, projected to reach 39 by 2032. The structure is 208 ft (63.4 m) long and 26 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Carries352 Avenue
CrossesWillow Ck
Location5.2S & 2E Herrick
RouteCounty Highway 0
Coordinates43.03495, -99.13889
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating32.6 US tons
Inventory rating19.5 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length208 ft (63.4 m)
Longest span63 ft (19.2 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36 (2022)
Projected traffic39 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$16,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 352 Avenue over Willow Ck built?

It was built in 1956, making it 69 years old in 2025.

What condition is 352 Avenue over Willow 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 July 2024.

How much traffic does 352 Avenue over Willow Ck carry?

About 36 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 352 Avenue over Willow Ck?

The structure is 208 ft (63.4 m) long with a longest span of 63 ft (19.2 m) and a deck 26 ft wide.

Who owns 352 Avenue over Willow Ck?

It is owned by the County Highway Agency.