US Bridges

US014A over Spearfish Ck

Good

Lawrence County, South Dakota · 4.8 N Cheyenne Xing · Structure no. 000000041063178

Built
2003
22 years old
Condition
Good
inspected June 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
85 ft
1 main span
Daily traffic
989
2024 count
Owner
State
State Highway Agency

About this bridge

US014A over Spearfish Ck is a prestressed concrete stringer/multi-beam or girder carrying US014A over Spearfish Ck in Lawrence County, South Dakota. It was built in 2003, so it is 22 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 989 vehicles a day, roughly 3% of them trucks, projected to reach 1,433 by 2044. The structure is 85 ft (25.9 m) long and 38 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesUS014A
CrossesSpearfish Ck
Location4.8 N Cheyenne Xing
RouteU.S. Route 14
Coordinates44.34647, -103.92387
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJune 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating71.8 US tons
Inventory rating43 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length85 ft (25.9 m)
Longest span81 ft (24.7 m)
Deck width38 ft (11.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic989 (2024)
Projected traffic1,433 by 2044
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Spearfish Ck built?

It was built in 2003, making it 22 years old in 2025.

What condition is US014A over Spearfish 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 June 2021.

How much traffic does US014A over Spearfish Ck carry?

About 989 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is US014A over Spearfish Ck?

The structure is 85 ft (25.9 m) long with a longest span of 81 ft (24.7 m) and a deck 38 ft wide.

Who owns US014A over Spearfish Ck?

It is owned by the State Highway Agency.