US Bridges

County RD 014B over Miller Ck

PoorPosted for load

Lawrence County, South Dakota · .2 W JCT US85S -Spearfish · Structure no. 000000041155090

Built
1934
91 years old
Condition
Poor
inspected October 2023
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
2,000
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

County RD 014B over Miller Ck is a concrete culvert carrying County RD 014B over Miller Ck in Lawrence County, South Dakota. It was built in 1934, so it is 91 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 2,000 vehicles a day, roughly 3% of them trucks, projected to reach 2,000 by 2035. The structure is 24 ft (7.3 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesCounty RD 014B
CrossesMiller Ck
Location.2 W JCT US85S -Spearfish
RouteCounty Highway 0
Coordinates44.4743, -103.73808
Functional classRural Major Collector

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
Channel and channel protection7 GoodSome minor problems.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating27.4 US tons
Inventory rating21.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length24 ft (7.3 m)
Longest span10 ft (3 m)
Deck width32 ft (9.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2022)
Projected traffic2,000 by 2035
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 County RD 014B over Miller Ck built?

It was built in 1934, making it 91 years old in 2025.

What condition is County RD 014B over Miller 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 October 2023.

How much traffic does County RD 014B over Miller Ck carry?

About 2,000 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is County RD 014B over Miller Ck?

The structure is 24 ft (7.3 m) long with a longest span of 10 ft (3 m) and a deck 32 ft wide.

Who owns County RD 014B over Miller Ck?

It is owned by the City or Municipal Highway Agency.