US Bridges

459 Ave over Willow Ck

Fair

Codington County, South Dakota · 4.0E 1.4N Watertown · Structure no. 000000015230166

Built
2006
19 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Prestressed Concrete
Length
76 ft
1 main span
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

459 Ave over Willow Ck is a prestressed concrete tee beam carrying 459 Ave over Willow Ck in Codington County, South Dakota. It was built in 2006, so it is 19 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 100 vehicles a day, roughly 9% of them trucks, projected to reach 110 by 2032. The structure is 76 ft (23.2 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries459 Ave
CrossesWillow Ck
Location4.0E 1.4N Watertown
RouteCounty Highway 0
Coordinates44.91025, -97.02501
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20 + Mod
Structure length76 ft (23.2 m)
Longest span72 ft (21.9 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic110 by 2032
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 459 Ave over Willow Ck built?

It was built in 2006, making it 19 years old in 2025.

What condition is 459 Ave over Willow 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 June 2024.

How much traffic does 459 Ave over Willow Ck carry?

About 100 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is 459 Ave over Willow Ck?

The structure is 76 ft (23.2 m) long with a longest span of 72 ft (21.9 m) and a deck 32 ft wide.

Who owns 459 Ave over Willow Ck?

It is owned by the County Highway Agency.