US Bridges

460 Avenue over Willow Ck

PoorPosted for load

Codington County, South Dakota · 5.0E 2.5N Watertown · Structure no. 000000015240155

Built
2001
24 years old, rebuilt 2021
Condition
Poor
inspected June 2024
Type
Tee Beam
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
472
2022 count
Owner
County
County Highway Agency

About this bridge

460 Avenue over Willow Ck is a prestressed concrete tee beam carrying 460 Avenue over Willow Ck in Codington County, South Dakota. It was built in 2001 and reconstructed in 2021, so it is 24 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. Its operating status is: posted for load restriction.

It carries about 472 vehicles a day, roughly 2% of them trucks, projected to reach 472 by 2020. The structure is 50 ft (15.2 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

Carries460 Avenue
CrossesWillow Ck
Location5.0E 2.5N Watertown
RouteCounty Highway 0
Coordinates44.92608, -97.00435
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
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating16 US tons
Inventory rating12 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length50 ft (15.2 m)
Longest span49 ft (14.9 m)
Deck width31 ft (9.4 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic472 (2022)
Projected traffic472 by 2020
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$100,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 460 Avenue over Willow Ck built?

It was built in 2001, making it 24 years old in 2025. It was reconstructed in 2021.

What condition is 460 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 June 2024.

How much traffic does 460 Avenue over Willow Ck carry?

About 472 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 460 Avenue over Willow Ck?

The structure is 50 ft (15.2 m) long with a longest span of 49 ft (14.9 m) and a deck 31 ft wide.

Who owns 460 Avenue over Willow Ck?

It is owned by the County Highway Agency.