US Bridges

403 Ave over North Br Twelve Mile Ck

Good

Davison County, South Dakota · 8.0W 0.1N Ethan · Structure no. 000000018090209

Built
2006
19 years old
Condition
Good
inspected July 2022
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
80
2022 count
Owner
County
County Highway Agency

About this bridge

403 Ave over North Br Twelve Mile Ck is a concrete continuous culvert carrying 403 Ave over North Br Twelve Mile Ck in Davison 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 80 vehicles a day, roughly 14% of them trucks, projected to reach 110 by 2032. The structure is 25 ft (7.5 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Carries403 Ave
CrossesNorth Br Twelve Mile Ck
Location8.0W 0.1N Ethan
RouteCounty Highway 0
Coordinates43.54237, -98.14397
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating36 US tons
Inventory rating21.6 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length25 ft (7.5 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2022)
Projected traffic110 by 2032
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 403 Ave over North Br Twelve Mile Ck built?

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

What condition is 403 Ave over North Br Twelve Mile Ck in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2022.

How much traffic does 403 Ave over North Br Twelve Mile Ck carry?

About 80 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is 403 Ave over North Br Twelve Mile Ck?

The structure is 25 ft (7.5 m) long with a longest span of 12 ft (3.7 m).

Who owns 403 Ave over North Br Twelve Mile Ck?

It is owned by the County Highway Agency.