MOUNTAINTOP STONEWORKS INC
AUTHORIZEDUSDOT
4424280
MC Number
N/A
Fleet Size
1
Total Drivers
1
Last updated: March 16, 2026
Broker verification report
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Safety overview
MOUNTAINTOP STONEWORKS INC is a small interstate motor carrier based in DUBUQUE, Iowa, operating 1 power unit with 1 drivers. CarrierOwl is currently validating BASIC percentile display against the official FMCSA SMS portal; use the inspection, out-of-service, crash, authority, and insurance data below as the primary public safety indicators on this page. Their driver out-of-service rate of 100.0% runs above the national average of 5.51%. No crashes on file. FMCSA records show 1 inspection for this carrier.
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BASIC scores
Under reviewCarrierOwl is validating BASIC percentile calculations against the official FMCSA SMS portal. Until that review is complete, use FMCSA directly for current BASIC percentiles and use the inspection, out-of-service, crash, authority, and insurance data on this page as supporting indicators.
BASIC percentile display is temporarily paused while we validate CarrierOwl's methodology against the official FMCSA SMS portal.
Out-of-service rates vs. national average
An out-of-service order means the driver or vehicle was pulled from operation during a roadside inspection.
For reference, the average driver OOS rate in Iowa is 7.2% and the average vehicle OOS rate is 29.9% across 25,829 carriers.
Company details
- Entity Type
- N/A
- Carrier Operation
- Interstate
- Operation Classification
- Private (Property)
- Cargo Carried
- N
- Hazmat
- No
- Safety Rating Date
- N/A
Inspections
1
Total
50%
Driver %
Insurance on file
No insurance records on file with FMCSA.
Crash history
0
Total Crashes
Similar carriers in Iowa
Other carriers in the same state with a similar fleet size.
VERNON AND SANDRA RICKLEFS
G & A TRUCKING LLC
DALE KLINKENBORG
ORVILLE L HICKS
DAVID CHRISTIANS
Frequently asked questions
Is MOUNTAINTOP STONEWORKS INC authorized to operate?
Yes. MOUNTAINTOP STONEWORKS INC (USDOT #4424280) currently holds "AUTHORIZED" status with FMCSA. They're registered as an interstate carrier.
What is MOUNTAINTOP STONEWORKS INC's safety record?
MOUNTAINTOP STONEWORKS INC has 1 inspection on file and no crashes on record. They do not show a formal FMCSA safety rating in CarrierOwl's current data. CarrierOwl is validating BASIC percentile display against the official FMCSA SMS portal, so brokers should verify current BASIC percentiles directly with FMCSA before relying on them.
How many trucks does MOUNTAINTOP STONEWORKS INC operate?
MOUNTAINTOP STONEWORKS INC operates 1 power unit with 1 driver on file. That makes them a small carrier.
Does MOUNTAINTOP STONEWORKS INC transport hazardous materials?
No. MOUNTAINTOP STONEWORKS INC does not have a hazardous materials flag in the FMCSA database.
Where is MOUNTAINTOP STONEWORKS INC located?
MOUNTAINTOP STONEWORKS INC is based in DUBUQUE, Iowa at 400 HARRISON ST STE 1, 52003. Phone: (563) 584-9499.
What are MOUNTAINTOP STONEWORKS INC's out-of-service rates?
MOUNTAINTOP STONEWORKS INC's driver out-of-service rate is 100.0%, compared to the national average of 5.51%. Higher than average, which could point to driver compliance issues. Their vehicle out-of-service rate is 0.0% (national average: 20.72%). Below average, suggesting the fleet is well-maintained.