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Truck Graph
70/100
⚠ Caution
Risk signals detected. Verify authority, insurance, and safety record.
Mountain Materials INC
DOT 1634570 · MC MC604904 · Alpine, CA
Report generated: June 7, 2026 at 7:30 AM
✓Authorized for hire?
✓Active insurance?
✗Safety record clean?
✗No fraud flags?
✓No prior revocations?
Carrier Summary

Mountain Materials INC (DOT 1634570, MC MC604904) is a California-based interstate carrier headquartered in Alpine, CA. As of June 7, 2026 at 7:30 AM, operating authority is currently active. TruckGraph has detected 4 risk signals on this carrier, including: authority revoked within the last 3 years; recordable crash on file. TruckGraph rates this carrier "Caution" based on FMCSA compliance data, inspection history, insurance status, and network connection analysis. Last synced: June 7, 2026 at 7:30 AM.

Common AuthorityBroker
FMCSA Public Record
Mountain Materials INC
DOT Number1634570
MC NumberMC604904
Street1117 TAVERN RD
City / StateAlpine, CA 91901
Phone6194454150
Operation typeInterstate
HazmatNot authorized
Authority age19 yr 1 mo
MCS-150 filed03/06/2026
Company officerMichele Shea
Power units18
Total drivers18
Authority Status
Common (for-hire)✓ Active
Contract (for-hire)Not authorized
Broker✓ Active
TruckGraph Intelligence
Risk Signals
●Authority revoked within the last 3 years
●Recordable crash on file
●Elevated vehicle out-of-service rate
●Unsafe driving violation on record
✓ OFAC Sanctions: Clear
Connection Chain
MICHELE C SHEAShared address
Active
OOS rate 22.2% vs. national avg 22.26% — below average
Network Intelligence Map
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Power Units
18
Fleet
Drivers
18
Total
Inspections
9
On record
Crashes
1
On record
OOS Rate
22.2%
↓ Avg 22.26%
Authority Age
19 yr 1 mo
Since 2007
Violation Categories — Last 24 Months
Hours of Service
9 insp (100%)
Unsafe Driving
9 insp (100%)· 4 viol
Driver Fitness
9 insp (100%)
Controlled Substances
9 insp (100%)
Vehicle Maintenance
5 insp (56%)· 3 viol
Inspection History
9 total · OOS rate 22.2%
DateStateLevelDriver OOSVehicle OOSResult
7/30/2024CAIII00Pass
4/29/2024CAIII00Pass
10/28/2024CAI03OOS
6/23/2025CAI01OOS
6/21/2024CAI00Pass
5/20/2025CAIII00Pass
1/16/2025CAIII00Pass
11/15/2024CAI00Pass
6/14/2024CAI00Pass
Crash History
1 total on record
DateStateFatalitiesInjuriesTow-away
—CA00Y
Insurance Status
Status
✓ Active filing on record
Insurer
WILLIAMSBURG NATIONAL INS CO.
Coverage type
91X
Coverage amount
$1,000,000
Effective
12/22/2025
Location
1117 TAVERN RD, Alpine, CA, 91901 · Open in Maps →
1117 TAVERN RD, ALPINE, CA, 91901Open in Maps →
Authority Timeline
Authority GrantedApr 2007
FMCSA issued operating authority
ActiveCurrent
Authority currently active

Source: FMCSA compliance records, inspection data, crash records, insurance filings, and TruckGraph analysis. View methodology

Important Legal Notice

Data sourced from FMCSA public records and TruckGraph independent analysis. This is not legal advice, not a guarantee of carrier safety, and not a compliance certification. Verify through official FMCSA sources before tendering. Last synced: .

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Frequently Asked Questions

Is Mountain Materials INC authorized to operate?

Yes. Mountain Materials INC holds Common operating authority and is currently active.

What is Mountain Materials INC's safety record?

Mountain Materials INC has 9 roadside inspections on record with an out-of-service rate of 22.2%. Crash history shows 1 incidents. Review the full safety profile above before making a freight decision.

How many trucks does Mountain Materials INC operate?

Mountain Materials INC operates 18 power units with approximately 18 drivers.

Is Mountain Materials INC insured?

Mountain Materials INC has active insurance coverage on file. Coverage amount and carrier details are shown in the insurance section above.

Has Mountain Materials INC had any risk indicators?

Mountain Materials INC has a risk score of 70/100 (High Risk) with 4 active risk signals. Review the risk section above and verify independently before tendering.

What is the DOT number for Mountain Materials INC?

Mountain Materials INC's DOT number is 1634570 and MC number is MC604904. These identifiers are assigned by the FMCSA and can be used to look up this carrier in official compliance databases.

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Truck Graph data is open and citable. For press inquiries, contact our editorial team.

APA
Truck Graph. (2026). Mountain Materials INC Safety Record, DOT 1634570. Retrieved from https://truckgraph.com/carriers/1634570
MLA
"Mountain Materials INC Safety Record, DOT 1634570." Truck Graph, Jun 7, 2026, https://truckgraph.com/carriers/1634570
Chicago
"Mountain Materials INC Safety Record, DOT 1634570." Truck Graph. Last modified June 7, 2026. https://truckgraph.com/carriers/1634570