US Bridges

HWY 1416 over Trib. to Box Elder Creek

Fair

Pennington County, South Dakota · 10.2 E New Underwood · Structure no. 000000052712290

Built
1936
89 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
90
2022 count
Owner
County
County Highway Agency

About this bridge

HWY 1416 over Trib. to Box Elder Creek is a concrete culvert carrying HWY 1416 over Trib. to Box Elder Creek in Pennington County, South Dakota. It was built in 1936, so it is 89 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 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 90 vehicles a day, roughly 22% of them trucks, projected to reach 90 by 2032. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 14.9 mi (24 km).

CarriesHWY 1416
CrossesTrib. to Box Elder Creek
Location10.2 E New Underwood
RouteCounty Highway 0
Coordinates44.09611, -102.62498
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34 US tons
Inventory rating26.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic90 (2022)
Projected traffic90 by 2032
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 HWY 1416 over Trib. to Box Elder Creek built?

It was built in 1936, making it 89 years old in 2025.

What condition is HWY 1416 over Trib. to Box Elder Creek 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 September 2023.

How much traffic does HWY 1416 over Trib. to Box Elder Creek carry?

About 90 vehicles per day (2022 count), of which roughly 22% are trucks.

How long is HWY 1416 over Trib. to Box Elder Creek?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns HWY 1416 over Trib. to Box Elder Creek?

It is owned by the County Highway Agency.