US Bridges

US014A over Homestake Flume

Fair

Lawrence County, South Dakota · 7.2 S of Spearfish · Structure no. 000000041077137

Built
1967
58 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
2,212
2024 count
Owner
State
State Highway Agency

About this bridge

US014A over Homestake Flume is a steel stringer/multi-beam or girder carrying US014A over Homestake Flume in Lawrence County, South Dakota. It was built in 1967, so it is 58 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 2,212 vehicles a day, roughly 4% of them trucks, projected to reach 3,205 by 2044. The structure is 40 ft (12.1 m) long and 35 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesUS014A
CrossesHomestake Flume
Location7.2 S of Spearfish
RouteU.S. Route 14
Coordinates44.40888, -103.89764
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating67.8 US tons
Inventory rating40.6 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length40 ft (12.1 m)
Longest span38 ft (11.6 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,212 (2024)
Projected traffic3,205 by 2044
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US014A over Homestake Flume built?

It was built in 1967, making it 58 years old in 2025.

What condition is US014A over Homestake Flume 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 May 2024.

How much traffic does US014A over Homestake Flume carry?

About 2,212 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is US014A over Homestake Flume?

The structure is 40 ft (12.1 m) long with a longest span of 38 ft (11.6 m) and a deck 35 ft wide.

Who owns US014A over Homestake Flume?

It is owned by the State Highway Agency.