US Bridges

Dillinger RD over Horse Ck

PoorPosted for load

Butte County, South Dakota · 2 W 1.1 S Newell · Structure no. 000000010290351

Built
1937
88 years old, rebuilt 1992
Condition
Poor
inspected August 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
72 ft
1 main span
Daily traffic
46
2022 count
Owner
County
County Highway Agency

About this bridge

Dillinger RD over Horse Ck is a wood or timber stringer/multi-beam or girder carrying Dillinger RD over Horse Ck in Butte County, South Dakota. It was built in 1937 and reconstructed in 1992, so it is 88 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 46 vehicles a day, roughly 2% of them trucks, projected to reach 46 by 2032. The structure is 72 ft (21.9 m) long and 16 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesDillinger RD
CrossesHorse Ck
Location2 W 1.1 S Newell
RouteCounty Highway 0
Coordinates44.70416, -103.46551
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating21.3 US tons
Inventory rating15 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1 (+2 approach)
Design loadUnknown
Structure length72 ft (21.9 m)
Longest span27 ft (8.2 m)
Deck width16 ft (5 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic46 (2022)
Projected traffic46 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

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 Dillinger RD over Horse Ck built?

It was built in 1937, making it 88 years old in 2025. It was reconstructed in 1992.

What condition is Dillinger RD over Horse 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 August 2024.

How much traffic does Dillinger RD over Horse Ck carry?

About 46 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Dillinger RD over Horse Ck?

The structure is 72 ft (21.9 m) long with a longest span of 27 ft (8.2 m) and a deck 16 ft wide.

Who owns Dillinger RD over Horse Ck?

It is owned by the County Highway Agency.