US Bridges

405th Ave. over James Rv

Fair

Sanborn County, South Dakota · 7.4N Forestburg · Structure no. 000000056110046

Built
1969
56 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
220 ft
3 main spans
Daily traffic
192
2022 count
Owner
County
County Highway Agency

About this bridge

405th Ave. over James Rv is a steel continuous stringer/multi-beam or girder carrying 405th Ave. over James Rv in Sanborn County, South Dakota. It was built in 1969, so it is 56 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 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 192 vehicles a day, roughly 3% of them trucks, projected to reach 192 by 2032. The structure is 220 ft (67.1 m) long and 30 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
Carries405th Ave.
CrossesJames Rv
Location7.4N Forestburg
RouteCounty Highway 0
CountySanborn County
StateSouth Dakota
Coordinates44.13303, -98.11082
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67 US tons
Inventory rating40.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length220 ft (67.1 m)
Longest span85 ft (25.9 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic192 (2022)
Projected traffic192 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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$3,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 405th Ave. over James Rv built?

It was built in 1969, making it 56 years old in 2025.

What condition is 405th Ave. over James Rv 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 August 2024.

How much traffic does 405th Ave. over James Rv carry?

About 192 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 405th Ave. over James Rv?

The structure is 220 ft (67.1 m) long with a longest span of 85 ft (25.9 m) and a deck 30 ft wide.

Who owns 405th Ave. over James Rv?

It is owned by the County Highway Agency.