US Bridges

Bennet Road over Box Elder Ck

PoorPosted for load

Pennington County, South Dakota · 0.5N & 1.0E Elk Vale Exit · Structure no. 000000052460280

Built
1973
52 years old
Condition
Poor
inspected May 2024
Type
Tee Beam
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
881
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Bennet Road over Box Elder Ck is a prestressed concrete tee beam carrying Bennet Road over Box Elder Ck in Pennington County, South Dakota. It was built in 1973, so it is 52 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 3 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 881 vehicles a day, roughly 2% of them trucks, projected to reach 881 by 2032. The structure is 40 ft (12.2 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesBennet Road
CrossesBox Elder Ck
Location0.5N & 1.0E Elk Vale Exit
RouteCounty Highway 0
Coordinates44.10877, -103.13109
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating18 US tons
Inventory rating13.4 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span39 ft (11.9 m)
Deck width27 ft (8.2 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic881 (2022)
Projected traffic881 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Bennet Road over Box Elder Ck built?

It was built in 1973, making it 52 years old in 2025.

What condition is Bennet Road over Box Elder 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 May 2024.

How much traffic does Bennet Road over Box Elder Ck carry?

About 881 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Bennet Road over Box Elder Ck?

The structure is 40 ft (12.2 m) long with a longest span of 39 ft (11.9 m) and a deck 27 ft wide.

Who owns Bennet Road over Box Elder Ck?

It is owned by the Town or Township Highway Agency.