Shamrock Vacuum Service Inc
USDOT 1285243MC-579917USDOT activeAuthority active· Liberty, TX
Shamrock Vacuum Service Inc (USDOT 1285243) runs 40 power units and 23 drivers based in Liberty, TX, with active operating authority as a motor carrier of property under MC-579917. The earliest grant on file is from November 2006, 20 years ago. $2,000,000 of liability coverage is on file with Obsidian Specialty Insurance Company. 1 other active carrier lists the same physical address.
Operating authority
| Docket | Authority | Status | Insurance required | On file |
|---|---|---|---|---|
| MC-579917 | Motor carrier of property | Active | $750,000 liability | $3,000,000 liability |
Earliest grant on file: Nov 1, 2006 (20 years ago).
Insurance and bonds on file
| Type | Insurer | Coverage | Effective | Cancellation |
|---|---|---|---|---|
| Liability (BIPD) · form 91X | Great Divide Insurance Company | $1,000,000 | Feb 6, 2026 | — |
| Liability (BIPD) · form 91X | Obsidian Specialty Insurance Company | $2,000,000 | Feb 6, 2025 | — |
Confirm coverage with the insurer before tendering a load.
Authority history
| Date | Docket | Action |
|---|---|---|
| Feb 6, 2014 | MC-579917 | Discontinued revocation · contract carrier |
| Jan 10, 2014 | MC-579917 | Involuntary revocation · contract carrier |
| Feb 3, 2012 | MC-579917 | Discontinued revocation · contract carrier |
| Jan 10, 2012 | MC-579917 | Involuntary revocation · contract carrier |
| Feb 22, 2011 | MC-579917 | Reinstated · motor carrier of property |
| Feb 14, 2011 | MC-579917 | Revoked · motor carrier of property |
| Nov 1, 2006 | MC-579917 | Granted · motor carrier of property |
Revocations
| Docket | Authority | Order served | Effective |
|---|---|---|---|
| MC-579917 | Contract | Jan 10, 2011 | Feb 14, 2011 · involuntary revocation |
Registration
| USDOT number | 1285243 |
|---|---|
| USDOT status | Active |
| MC number | MC-579917 |
| Legal name | Shamrock Vacuum Service Inc |
| Operation | Interstate |
| Classification | Authorized for hire |
| Location | Liberty, Texas 77575 |
| USDOT added | Sep 14, 2004 |
| Last MCS-150 update | Feb 4, 2026 |
| Safety rating | Satisfactory · Aug 12, 2009 |
| Hazardous materials | Yes |
Fleet
| Power units | 40 |
|---|---|
| Trucks | 35 |
| Drivers | 23 · 23 with a CDL |
| Annual miles | 1,340,000 · 2025 |
Cargo carried
Liquids/gases, Oilfield equipment, Chemicals, oilfield fluids
Other records
- 1 other active carrier lists the same physical address. Shared addresses are common for fleets, terminals and filing agents; they are one input to a vetting decision, not a finding.
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Data as of Nov 12, 2026. Sources
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