US Bridges

25210 413 Avenue over Rock Ck

Poor

Hanson County, South Dakota · 6.0 MI W of Fulton · Structure no. 000000031010081

Built
1983
42 years old
Condition
Poor
inspected July 2023
Type
Tee Beam
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
70
2022 count
Owner
County
County Highway Agency

About this bridge

25210 413 Avenue over Rock Ck is a prestressed concrete tee beam carrying 25210 413 Avenue over Rock Ck in Hanson County, South Dakota. It was built in 1983, so it is 42 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 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.

It carries about 70 vehicles a day, roughly 3% of them trucks, projected to reach 70 by 2032. The structure is 65 ft (19.8 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Carries25210 413 Avenue
CrossesRock Ck
Location6.0 MI W of Fulton
RouteCounty Highway 0
Coordinates43.73027, -97.94849
Functional classRural Major Collector

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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating35.3 US tons
Inventory rating21.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length65 ft (19.8 m)
Longest span64 ft (19.5 m)
Deck width31 ft (9.4 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70 (2022)
Projected traffic70 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$16,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 25210 413 Avenue over Rock Ck built?

It was built in 1983, making it 42 years old in 2025.

What condition is 25210 413 Avenue over Rock 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 2023.

How much traffic does 25210 413 Avenue over Rock Ck carry?

About 70 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 25210 413 Avenue over Rock Ck?

The structure is 65 ft (19.8 m) long with a longest span of 64 ft (19.5 m) and a deck 31 ft wide.

Who owns 25210 413 Avenue over Rock Ck?

It is owned by the County Highway Agency.