US Bridges

Nemo Road over Boxelder Ck

Poor

Lawrence County, South Dakota · 2.4 N 3.5 W Nemo · Structure no. 000000041239259

Built
1974
51 years old
Condition
Poor
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
70 ft
1 main span
Daily traffic
425
2022 count
Owner
County
County Highway Agency

About this bridge

Nemo Road over Boxelder Ck is a prestressed concrete continuous box beam or girders - multiple carrying Nemo Road over Boxelder Ck in Lawrence County, South Dakota. It was built in 1974, so it is 51 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.

It carries about 425 vehicles a day, roughly 3% of them trucks, projected to reach 425 by 2032. The structure is 70 ft (21.3 m) long and 30 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

CarriesNemo Road
CrossesBoxelder Ck
Location2.4 N 3.5 W Nemo
RouteCounty Highway 0
Coordinates44.22834, -103.57586
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
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 geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span67 ft (20.5 m)
Deck width30 ft (9.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic425 (2022)
Projected traffic425 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 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 Nemo Road over Boxelder Ck built?

It was built in 1974, making it 51 years old in 2025.

What condition is Nemo Road over Boxelder 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 July 2024.

How much traffic does Nemo Road over Boxelder Ck carry?

About 425 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Nemo Road over Boxelder Ck?

The structure is 70 ft (21.3 m) long with a longest span of 67 ft (20.5 m) and a deck 30 ft wide.

Who owns Nemo Road over Boxelder Ck?

It is owned by the County Highway Agency.