DIAMOND CORING CO INC
AUTHORIZEDUSDOT
948584
MC Number
406494
Fleet Size
15
Total Drivers
15
Last updated: March 16, 2026
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Safety overview
DIAMOND CORING CO INC is a small interstate motor carrier based in CHICAGO, Illinois, operating 15 power units with 15 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 33.3% runs above the national average of 5.51%. No crashes on file. FMCSA records show 3 inspections 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 Illinois is 9.1% and the average vehicle OOS rate is 27.0% across 49,579 carriers.
Company details
- Entity Type
- N/A
- Carrier Operation
- Interstate
- Operation Classification
- Authorized For Hire, Private (Property)
- Cargo Carried
- N
- Hazmat
- No
- Safety Rating Date
- N/A
Inspections
3
Total
60%
Driver %
Insurance on file
Liability (BIPD)
ARCH INSURANCE COMPANY — eff. Oct 1, 2025
Cargo
Not on file
Surety Bond
Not on file
Trust Fund
Not on file
Crash history
0
Total Crashes
Similar carriers in Illinois
Other carriers in the same state with a similar fleet size.
EMERGENCY MANAGEMENT SYSTEMS AND TRANSPORT LLC
KIEFT BROS INC
WHEELS ENTERPRISE INC
ELZY TRANSPORTATION INC
MCLEAN COUNTY ASPHALT CO INC
Frequently asked questions
Is DIAMOND CORING CO INC authorized to operate?
Yes. DIAMOND CORING CO INC (USDOT #948584) currently holds "AUTHORIZED" status with FMCSA. They're registered as an interstate carrier.
What is DIAMOND CORING CO INC's safety record?
DIAMOND CORING CO INC has 3 inspections 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 DIAMOND CORING CO INC operate?
DIAMOND CORING CO INC operates 15 power units with 15 drivers on file. That makes them a small carrier.
Does DIAMOND CORING CO INC transport hazardous materials?
No. DIAMOND CORING CO INC does not have a hazardous materials flag in the FMCSA database.
Where is DIAMOND CORING CO INC located?
DIAMOND CORING CO INC is based in CHICAGO, Illinois at 11800 S EWING AVE, 60617. Phone: (773) 978-5000.
What are DIAMOND CORING CO INC's out-of-service rates?
DIAMOND CORING CO INC's driver out-of-service rate is 33.3%, 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.