Black Hills Trenching & Boring LLC Safety Record
DOT# 4004854 · Spearfish, SD 57783-8674 · 6056411584
Average safety record — scored 50/100. This carrier's inspection results are typical for the industry.
Last inspected 12/16/2025
Safety Score Breakdown · 50/100 points
Lower scores are better. How is this calculated?
According to FMCSA records, Black Hills Trenching & Boring LLC (DOT# 4004854) in Spearfish, South Dakota has 8 inspections on record with 87 violations and a 275.0% vehicle out-of-service rate. Safety grade: C.
Out-of-Service Rates vs. National Average
An out-of-service (OOS) violation means a vehicle or driver was found unsafe to operate during a roadside inspection and was prohibited from continuing until the issue was corrected.
Violation Categories · 87 total violations
FMCSA groups violations into Behavioral Analysis and Safety Improvement Categories (BASICs). Each violation found during a roadside inspection is classified into a category that reflects the type of safety risk.
Inspection History · 8 records
FMCSA inspections range from Level 1 (full vehicle and driver examination) to Level 6 (enhanced motorcoach inspection). Level 1 is the most thorough; Levels 2 and 3 are walk-around and driver-only checks.
| Date | State | Veh OOS | Drv OOS |
|---|---|---|---|
| 12/16/2025 | WY | 9 | 2 |
| 04/09/2025 | WY | 5 | 2 |
| 03/17/2025 | MT | 3 | 1 |
| 03/04/2025 | SD | 0 | 1 |
| 12/09/2024 | MT | 1 | 0 |
| 09/25/2024 | MT | 1 | 0 |
| 08/28/2024 | MT | 0 | 0 |
| 05/11/2024 | WY | 3 | 2 |
Fleet Profile
Power units include trucks, tractors, and other commercial motor vehicles registered to the carrier. Driver count reflects the total number of drivers reported on the carrier's MCS-150 filing.