US Bridges

Alkali Rd. over Belle Fourche Rv

Fair

Meade County, South Dakota · 3 W Hereford · Structure no. 000000047300455

Built
1983
42 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
257 ft
3 main spans
Daily traffic
40
2022 count
Owner
County
County Highway Agency

About this bridge

Alkali Rd. over Belle Fourche Rv is a prestressed concrete continuous stringer/multi-beam or girder carrying Alkali Rd. over Belle Fourche Rv in Meade 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 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 40 vehicles a day, roughly 3% of them trucks, projected to reach 40 by 2032. The structure is 257 ft (78.3 m) long and 33 ft wide. If it were closed, the detour would be 47.8 mi (77 km).

Location

Open in Google Maps
CarriesAlkali Rd.
CrossesBelle Fourche Rv
Location3 W Hereford
RouteCounty Highway 0
CountyMeade County
StateSouth Dakota
Coordinates44.38076, -102.96605
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99 US tons
Inventory rating44.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length257 ft (78.3 m)
Longest span81 ft (24.7 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2022)
Projected traffic40 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed47.8 mi (77 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$8,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Alkali Rd. over Belle Fourche Rv built?

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

What condition is Alkali Rd. over Belle Fourche 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 July 2024.

How much traffic does Alkali Rd. over Belle Fourche Rv carry?

About 40 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Alkali Rd. over Belle Fourche Rv?

The structure is 257 ft (78.3 m) long with a longest span of 81 ft (24.7 m) and a deck 33 ft wide.

Who owns Alkali Rd. over Belle Fourche Rv?

It is owned by the County Highway Agency.