US Bridges

Old Belle HWY over Spearfish Ck

Good

Lawrence County, South Dakota · 1.5 W 5.5 N Spearfis · Structure no. 000000041079024

Built
2006
19 years old
Condition
Good
inspected July 2024
Type
Slab
Concrete Continuous
Length
127 ft
3 main spans
Daily traffic
740
2022 count
Owner
County
County Highway Agency

About this bridge

Old Belle HWY over Spearfish Ck is a concrete continuous slab carrying Old Belle HWY over Spearfish Ck in Lawrence 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 740 vehicles a day, roughly 9% of them trucks, projected to reach 910 by 2032. The structure is 127 ft (38.7 m) long and 32 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesOld Belle HWY
CrossesSpearfish Ck
Location1.5 W 5.5 N Spearfis
RouteCounty Highway 0
Coordinates44.57147, -103.8912
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
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 geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating39.2 US tons
Inventory rating30.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length127 ft (38.7 m)
Longest span46 ft (13.9 m)
Deck width32 ft (9.9 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic740 (2022)
Projected traffic910 by 2032
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 Old Belle HWY over Spearfish Ck built?

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

What condition is Old Belle HWY 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 July 2024.

How much traffic does Old Belle HWY over Spearfish Ck carry?

About 740 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is Old Belle HWY over Spearfish Ck?

The structure is 127 ft (38.7 m) long with a longest span of 46 ft (13.9 m) and a deck 32 ft wide.

Who owns Old Belle HWY over Spearfish Ck?

It is owned by the County Highway Agency.