US Bridges

Hammerquist Road over Rapid Ck

PoorPosted for load

Pennington County, South Dakota · 1.2W 0.5N Farmingdale · Structure no. 000000052575383

Built
1916
109 years old
Condition
Poor
inspected June 2023
Type
Arch - Deck
Concrete
Length
51 ft
1 main span
Daily traffic
54
2022 count
Owner
County
County Highway Agency

About this bridge

Hammerquist Road over Rapid Ck is a concrete arch - deck carrying Hammerquist Road over Rapid Ck in Pennington County, South Dakota. It was built in 1916, so it is 109 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 54 vehicles a day, roughly 2% of them trucks, projected to reach 54 by 2032. The structure is 51 ft (15.5 m) long and 20 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesHammerquist Road
CrossesRapid Ck
Location1.2W 0.5N Farmingdale
RouteCounty Highway 0
Coordinates43.96681, -102.90901
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating24 US tons
Inventory rating18 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length51 ft (15.5 m)
Longest span51 ft (15.5 m)
Deck width20 ft (6 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic54 (2022)
Projected traffic54 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Hammerquist Road over Rapid Ck built?

It was built in 1916, making it 109 years old in 2025.

What condition is Hammerquist Road over Rapid Ck in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2023.

How much traffic does Hammerquist Road over Rapid Ck carry?

About 54 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Hammerquist Road over Rapid Ck?

The structure is 51 ft (15.5 m) long with a longest span of 51 ft (15.5 m) and a deck 20 ft wide.

Who owns Hammerquist Road over Rapid Ck?

It is owned by the County Highway Agency.