Alpine, CA
DOT 1634570MC 60490419 trucks11 drivers
Green: NO RED FLAGS IN FMCSA RECORDS
Active authority and insurance on file. Still confirm every load by calling the phone number on file.
Authority
Active Authority
Legally allowed to pick up and haul interstate freight.
MC active for 7 years, 8 months (since February 25, 2019)
Insurance
Active Liability Insurance ($1,000,000 Covered)
Pays for damage or injuries if this truck causes a crash. It's on file with FMCSA.
Paperwork (MCS-150)
Paperwork Status: Up to Date
Last filed March 6, 2026. Next update due by October 2027.
Safety Rating
Not Checked
Not in this record. Run a live check for FMCSA's current rating.
| Form | Class | Insurance carrier | Policy # | Effective |
|---|---|---|---|---|
| BMC-84 | Primary | American Contractors Indemnity Company | 100428305 | Apr 10, 2026 |
| BMC-84 | Primary | American Contractors Indemnity Company | 100428305 | Apr 10, 2026 |
| BMC-91X | Primary | WILLIAMSBURG NATIONAL INSURANCE COMPANY | CA0866393 | Dec 22, 2025 |
| BMC-91X | Primary | WILLIAMSBURG NATIONAL INSURANCE COMPANY | CA0866393 | Dec 22, 2025 |
| Coverage | On record with FMCSA |
|---|---|
| Liability (BIPD) required | $750,000 |
| Liability (BIPD) on file | $1,000,000 |
| Broker bond | On file |
| Cargo insurance | Not on file |
FMCSA insurance file as of November 15, 2026.
Filings are the active or pending insurance policies FMCSA lists for this company; our copy refreshes nightly. Coverage amounts are not shown per policy.
From FMCSA's authority history (its current Motus system, plus the older L&I history it froze on May 14, 2026). "First granted" is the earliest grant on record; "on record since" is the earliest action FMCSA has when the grant itself is older than its electronic records. "Active since" is the latest grant or reinstatement, so a lapse that FMCSA reinstated restarts the clock.
From FMCSA's Safety Measurement System files, October 2024 to October 2026. Crash counts include crashes the carrier didn't cause. Out-of-service rates use only inspections that checked the driver or the vehicle.
Every roadside inspection in FMCSA's file for USDOT #1634570: when, where, and which vehicles (type, make, VIN) the inspector recorded.
THC compares FMCSA's files every night and keeps what changed. Tracked since October 30, 2026, last compared November 15, 2026.
No changes seen in the details THC tracks (status, name, phone, MC number, authority, insurance and bond filings) since October 30, 2026. That covers only what FMCSA's public files show.
Dates are when THC noticed the change in FMCSA's files, not when it happened, unless FMCSA's file gives the date. FMCSA's files can lag behind FMCSA's own systems. Check this record on FMCSA SAFER · Daily FMCSA change reports
Yes. USDOT 1634570 (Mountain Materials INC) is active, with active for-hire carrier operating authority under MC 604904 (FMCSA authority file, November 15, 2026).
FMCSA's authority history shows Mountain Materials INC's common carrier authority was first granted on June 8, 2007 and has been active without a break since February 25, 2019; its broker authority was first granted on February 25, 2019 and is active.
Our daily record doesn't include Mountain Materials INC's safety rating. Run a free live check to see FMCSA's current rating. Most carriers are "Not Rated", which is normal: it means FMCSA has never done a full audit.
In FMCSA's safety data for October 2024 to October 2026, Mountain Materials INC had 6 roadside inspections. 0.0% of driver inspections (all carriers: 6.1%) and 50.0% of vehicle inspections (all carriers: 22.6%) ended out of service. It had no reportable crashes.
Yes, it looks up to date. FMCSA's records show it was last filed March 6, 2026. The next update is due by October 31, 2027.
Yes. FMCSA's records show liability (BIPD) insurance on file for Mountain Materials INC ($1,000,000 on file). Ask for a certificate of insurance naming you before the load.
From public FMCSA records (the Company Census File, FMCSA's daily authority and insurance file and its monthly Safety Measurement System inspection and crash files). Trucking Help Center is not FMCSA and is not affiliated with this company. Records can change daily: run a live check, and confirm every load by calling the phone number on file. Is this your company and something looks wrong? Update your MCS-150 with FMCSA; our copy refreshes nightly.
Green: NO RED FLAGS IN FMCSA RECORDS
Active authority and insurance on file. Still confirm every load by calling the phone number on file.
Authority
Active Authority
Legally allowed to pick up and haul interstate freight.
MC active for 7 years, 8 months (since February 25, 2019)
Insurance
Active Liability Insurance ($1,000,000 Covered)
Pays for damage or injuries if this truck causes a crash. It's on file with FMCSA.
Paperwork (MCS-150)
Paperwork Status: Up to Date
Last filed March 6, 2026. Next update due by October 2027.
Safety Rating
Not Checked
Not in this record. Run a live check for FMCSA's current rating.
