US Bridges

Rimrock Lodge Road over Spearfish Ck

Fair

Lawrence County, South Dakota · 5.0S and 0.5W Spearfish · Structure no. 000000041089117

Built
1977
48 years old
Condition
Fair
inspected July 2024
Type
Tee Beam
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

Rimrock Lodge Road over Spearfish Ck is a prestressed concrete tee beam carrying Rimrock Lodge Road over Spearfish Ck in Lawrence County, South Dakota. It was built in 1977, so it is 48 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 5 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 100 vehicles a day, roughly 2% of them trucks, projected to reach 100 by 2032. The structure is 40 ft (12.2 m) long and 19 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesRimrock Lodge Road
CrossesSpearfish Ck
Location5.0S and 0.5W Spearfish
RouteCounty Highway 0
CountyLawrence County
StateSouth Dakota
Coordinates44.42726, -103.87315
Functional classRural Local

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.
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span38 ft (11.6 m)
Deck width19 ft (5.9 m)
Roadway width19 ft (5.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic100 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 Rimrock Lodge Road over Spearfish Ck built?

It was built in 1977, making it 48 years old in 2025.

What condition is Rimrock Lodge Road over Spearfish Ck 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 Rimrock Lodge Road over Spearfish Ck carry?

About 100 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Rimrock Lodge Road over Spearfish Ck?

The structure is 40 ft (12.2 m) long with a longest span of 38 ft (11.6 m) and a deck 19 ft wide.

Who owns Rimrock Lodge Road over Spearfish Ck?

It is owned by the County Highway Agency.