HIER DRILLING CO
USDOT 1203310
Active, intrastate (non-hazmat) carrier, small fleet (8 power units) — no FMCSA safety rating on record (common).
Vetting summary
At a glance
- Out-of-service rate0% vs 19.1% national avg
These signals summarize the records shown below — they are a starting point for your own checks, not a judgment of the carrier.
Registration
Carrier identity
| USDOT Number | 1203310 |
|---|---|
| MC Number | — |
| Legal Name | HIER DRILLING CO |
| DBA Name | — |
| Entity Type | — |
| Phone | 3036883012 |
| Address | 2755 N LIGGETT RD, Castle Rock, CO, 80109 |
Status
Authority & safety
| Operating Status | Active |
|---|---|
| Operation Type | Intrastate (Non-Hazmat) |
| Safety Rating | None on record — most carriers have not received a formal FMCSA safety rating. |
| Hazmat Flag | false |
Safety ratings: S = Satisfactory, C = Conditional, U = Unsatisfactory. A carrier with no rating has not been through a full FMCSA compliance review — this is common and not itself a red flag.
Safety events
Inspections & crashes (last 24 months)
| Inspections | 1 |
|---|---|
| Out-of-Service Rate | 0% vs 19.1% national average |
Most frequent violation categories: 28 (2).
Crash involvement does not imply fault. FMCSA crash records list all reportable crashes involving a carrier, regardless of who caused them.
Equipment
Fleet & operations
| Power Units (trucks) | 8 |
|---|---|
| Drivers | 11 |
| Recent Annual Mileage | 50 |
| Last MCS-150 Filing | 14-MAR-25 |
HIER DRILLING CO operates 8 power units — a larger fleet than 93% of carriers registered in CO.
Nearby
Other carriers in Castle Rock, CO
- DOUGLAS COUNTY SCHOOL DISTRICT — USDOT 1378849, 263 power units
- DOUGLAS COUNTY GOVERNMENT — USDOT 1144586, 63 power units
- COLORADO POWERLINE INC — USDOT 1599073, 51 power units
- FOOTHILLS UTILITY CONTRACTING INC — USDOT 1618961, 16 power units
- COLORADO PUMP SERVICE & SUPPLY CO — USDOT 1310792, 11 power units
Browse all carriers in Castle Rock, CO or all CO carriers.