TruckCodex

DIAMOND CORING CO INC

USDOT 948584 Active CORPORATION Based in CHICAGO, IL
Operating authority
Insurance

ARCH INSURANCE COMPANY · 91X

1 active policy

BOC-3 agent

EVILSIZOR PROCESS SERVERS INC

Power Units
15
Drivers
15
Inspections
5
last 24 months included
OOS Rate (peak)
33.3%
driver or vehicle, whichever higher
Crashes (24m)
0
13 all-time
Authorities
1
1 active
Carrier analysis & narrative context SEO summary, status notes, AI overview, and safety profiles

DIAMOND CORING CO INC is a corporation based in CHICAGO, IL, registered with the FMCSA under USDOT 948584. The carrier is currently active in FMCSA's records, and has not yet received a formal FMCSA safety rating. MCS-150 self-reporting puts the fleet at 15 power units and 15 drivers, with 5 roadside inspections on file and a peak out-of-service rate of 33.3%. Use this page to verify the carrier's authority and insurance, review its inspection and crash history, and cross-reference live data on FMCSA SAFER before booking a load or onboarding a partner.

Carrier is unrated

FMCSA has not assigned this carrier a formal safety rating. Use the inspection history and BASIC scores below to assess on-road performance.

Carrier overview

DIAMOND CORING CO INC is a mid-sized fleet, operating 15 power units and 15 drivers, organized as a corporation, based in Chicago, IL. Across 3 roadside inspections in the last 24 months, the fleet recorded a 0.0% out-of-service rate, with no reportable crashes on file. Operating authority is active for contract.

Inspection profile

3 roadside inspections over the last 24 months, up 50% versus the prior 24 months, concentrated in ND (1) and IL (1), with Level 3 inspections the most common.

Violation profile

0.0% out-of-service rate; led by Driver Fitness (50.0% of violations); top code 383.23A2 (Operating a CMV without a CDL) cited 1 times, 1 of them OOS.

Fleet profile

The fleet comprises 15 power units (mid-sized fleet) and 15 drivers; International and Eager beav are the most-inspected makes.

Compliance & contact

vs. National Average
Vehicle OOS Rate 0.0% vs 23.4% -23.4 pts
Driver OOS Rate 33.3% vs 6.7% +26.6 pts
Violations per Inspection 0.67 vs 1.80 -1.13
Peer tier (mid-sized fleets (11-100 power units)) median OOS rate: 27.3%
Location & Contact
11800 S EWING AVE
CHICAGO, IL 60617
Phone: 7739785000
Registration
USDOT 948584
Entity CORPORATION
Operation A
MCS-150 mileage 170,351 mi

Risk Signals

High OOS rate
Peak OOS rate of 33.3% is well above the 10–15% national average.
Authority revoked
1 revocation on record.

Out-of-Service rate vs same-size peers FMCSA roadside inspections, % placed out-of-service

Compared against 67,181 ACTIVE carriers operating 8–23 power units (±50% of this carrier's 15 unit fleet).

This carrier — Driver OOS
33.3%
Drivers placed out-of-service at roadside inspections
Peer median
0%
Median across 67,181 same-size peers
Verdict
Riskier than peers
Delta +33.3 pts vs peer median (lower is safer)
This carrier — Vehicle OOS
0%
Vehicles placed out-of-service at roadside inspections
Peer median
20%
Median across 67,181 same-size peers
Verdict
Safer than peers
Delta -20 pts vs peer median (lower is safer)

Authority gap detected (1)

  • Contract (Property) authority was inactive from Apr 28, 2009 to Nov 23, 2011 (939 days)

Historical coverage gap detected (1)

  • No active BIPD/Primary insurance from Apr 22, 2009 to Mar 11, 2011 (688 days)
Inspection Analytics Monthly activity · BASIC mix · state map

Monthly Inspection Activity (24 months)

2024-10 2025-10

Violations by BASIC Category

Federal BASIC buckets for every citation issued against this carrier over the past 24 months.
Driver Fitness
1 violation
1 OOS · 100.0%
Unsafe Driving
1 violation

Activity by State

States this carrier has been inspected in over the past 24 months.
State Inspections OOS OOS % Last Inspection
Illinois (IL) 1 0 0.0% Sep 25, 2025
Indiana (IN) 1 0 0.0% Oct 7, 2025
North Dakota (ND) 1 0 0.0% Oct 12, 2024
Vehicle Fleet Top makes and models observed in roadside inspections
Make Model Inspections
International 4
Chub 1
Eager Beav 1
Recent Inspections (5 rows) View all 5 →
Inspection # Date ▼ State Level Station Vehicle Violations Top Codes OOS
86013790 Oct 7, 2025 IN 1 WESTVILLE IN
INTERNATIO STRAIGHT TRUCK
IL 27638J · 1HTMPAFM86H224966
1 392.2-SLLIRP No
85969148 Sep 25, 2025 IL 3 I-290
INTL TRUCK TRACTOR
IL P1095987 · 3HSDJAPT5GN012285
1 383.23A2 No
82897050 Oct 12, 2024 ND 2 MINOT ND
INTERNATIO TRUCK TRACTOR
IL P1095987 · 3HSDJAPT5GN012285
0 — No
79209495 Jul 20, 2023 IN 2 —
INTL STRAIGHT TRUCK
IL 103220H · 3HAMMMMM9GL005491
3 383.23(a)(2), 392.2 Yes
78404007 Apr 19, 2023 MO 1 —
VOLV STRAIGHT TRUCK
IL P697339 · 4V4NC9TG94N364828
17 396.3(a)(1), 392.4(a), 395.8(k)(2) Yes
Recent Crashes (13 rows)
Report # Date ▼ State Fatalities Injuries Tow Hazmat Severity
IN0903638141 Jul 28, 2020 IN 1 1 Yes Yes Fatal
IN0903455546 Sep 28, 2019 IN 0 1 Yes Yes Injury
IN0903261012 Nov 12, 2018 IN 0 0 Yes Yes Tow
IN0903054271 Dec 5, 2017 IN 0 1 No Yes Injury
ILX000737296 Feb 9, 2017 IL 0 0 Yes Yes Tow
WI0000075069 Aug 19, 2015 WI 1 0 Yes Yes Fatal
NJ0012127054 Jun 9, 2012 NJ 0 1 Yes Yes Injury
IL0008565822 Jul 29, 2008 IL 0 0 Yes Yes Tow
IL0008958389 Jun 20, 2008 IL 0 0 Yes Yes Tow
IL0008890989 Nov 14, 2007 IL 0 1 Yes Yes Injury
IL0006917280 Jul 28, 2006 IL 0 0 Yes Yes Tow
IL0006568514 Mar 22, 2005 IL 0 1 Yes Yes Injury
IL0007384196 Aug 6, 1999 IL 0 0 Yes Yes Tow
Authority Records (1 docket)
CONTRACT
MC406494
Active
—
View full authority record →
MC Certificate Documents (1 PDF)

Authority Records (above) are FMCSA docket status and lifecycle events. MC Certificate Documents here are the archived PDF letters for each action — grants, reinstatements, revocations, name changes, and transfers. They are related but not the same dataset: one row per PDF letter, not one file per docket.

Click a row to open that specific letter. Multiple letters per docket are listed separately by action type and date.

Date Docket Action Authority PDF
Nov 23, 2011 MC406494-P REI REINSTATEMENT REI →
Insurance Coverage Timeline (10 rows)

Every insurance policy on file, newest effective date first. Amber rows mark BIPD/Primary coverage gaps.

Insurer Policy # Type Effective Cancel Status
ARCH INSURANCE COMPANY 11PKG2281100 91X Oct 1, 2025 On file ACTIVE
SELECTIVE INSURANCE COMPANY OF AMERICA S 2499345 BIPD/Primary Apr 22, 2022 Nov 28, 2025 CANCELLED
SELECTIVE INSURANCE COMPANY OF AMERICA S 2499345 BIPD/Primary Apr 22, 2022 Oct 1, 2025 REPLACED
LIBERTY MUTUAL FIRE INSURANCE CO. AS2-Z91-471525-02 BIPD/Primary Mar 31, 2020 Apr 22, 2022 REPLACED
LIBERTY MUTUAL FIRE INSURANCE CO. AS2-Z91-471525-02 BIPD/Primary Mar 31, 2020 May 14, 2022 CANCELLED
WESTFIELD INSURANCE CO. CMM 3 847 331 BIPD/Primary Mar 11, 2015 Mar 31, 2020 CANCELLED
STARR INDEMNITY & LIABILITY INSURANCE COMPANY SISIPCA08204811 BIPD/Primary Mar 11, 2011 Mar 11, 2015 REPLACED
Coverage gap — 688 days without BIPD/Primary coverage from Apr 22, 2009 to Mar 11, 2011
AMERICAN STATES INSURANCE CO. 01CH448949 BIPD/Primary Nov 6, 2008 Apr 22, 2009 CANCELLED
QBE INSURANCE CORPORATION FCAC 706181-00 BIPD/Primary Mar 11, 2002 Nov 6, 2008 REPLACED
Compliance Timeline Merged authority / insurance / enforcement events
  1. Nov 28, 2025
    insurance
    TERM/CANCL — SELECTIVE INSURANCE COMPANY OF AMERICA
  2. Nov 14, 2025
    authority
    DISCONTINUED REVOCATION — CONTRACT
    Details →
  3. Oct 1, 2025
    insurance
    TERM/REPL — SELECTIVE INSURANCE COMPANY OF AMERICA
  4. May 14, 2022
    insurance
    TERM/CANCL — LIBERTY MUTUAL FIRE INSURANCE CO.
  5. Apr 27, 2022
    authority
    DISCONTINUED REVOCATION — CONTRACT
    Details →
  6. Apr 22, 2022
    insurance
    TERM/REPL — LIBERTY MUTUAL FIRE INSURANCE CO.
  7. Mar 31, 2020
    insurance
    CANCEL — WESTFIELD INSURANCE CO.
  8. Mar 26, 2020
    authority
    DISCONTINUED REVOCATION — CONTRACT
    Details →
  9. Mar 11, 2015
    insurance
    TERM/REPL — STARR INDEMNITY & LIABILITY INSURANCE COMPANY
  10. Nov 23, 2011
    authority
    REINSTATED — MOTOR PROPERTY CONTRACT CARRIER
    Details →
  11. Apr 28, 2009
    authority
    REVOKED — MOTOR PROPERTY CONTRACT CARRIER
    Details →
  12. Apr 28, 2009
    authority
    Authority revoked — INVOLUNTARY REVOCATION
  13. Apr 28, 2009
    authority gap
    Contract (Property) authority inactive: 939 days (through Nov 23, 2011)
  14. Apr 22, 2009
    insurance
    CANCEL — AMERICAN STATES INSURANCE CO.
  15. Apr 22, 2009
    insurance gap
    Coverage gap: 688 days without BIPD/Primary insurance (through Mar 11, 2011)
  16. Nov 6, 2008
    insurance
    TERM/REPL — QBE INSURANCE CORPORATION
Top Stations & Violation Codes Where this carrier gets inspected and what they get cited for

Most-Inspected Stations

Station State Inspections OOS
I-290 IL 1 0
WESTVILLE IN IN 1 0
MINOT ND ND 1 0

Top Violation Codes Cited

Code Description Category Cited OOS
395.8 Record of Duty Status violation (general/form and manner) Hours of Service 4 0
392.2 Operating a CMV while ill or fatigued Unsafe Driving 3 0
392.4(a) Use of drugs Controlled Substances/Alcohol 2 2
393.47(e) Slack adjuster defective Vehicle Maintenance 2 0
396.3(a)(1) Inspection/repair/maintenance - general Vehicle Maintenance 2 1
383.23(a)(2) CDL - wrong class Driver Fitness 1 1
392.16(a) Failing to use seat belt (49 CFR) Unsafe Driving 1 0
392.5(a)(2) BAC 0.04+ Controlled Substances/Alcohol 1 1
393.45(b)(2) Brake tubing/hoses inadequate Vehicle Maintenance 1 0
393.53(b) Steering system components worn Vehicle Maintenance 1 0
Related Records Cross-references to every adjacent page
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Carrier Records
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Explainers

How to verify DIAMOND CORING CO INC

  1. Verify USDOT and MC numbers match the carrier's documents. Compare the USDOT number and MC docket on this page to the numbers on the carrier's invoice, rate confirmation, or load-board listing. A mismatch between the carrier's claimed numbers and the registered legal name is the single most common red flag.
  2. Check active operating authority and insurance status. Confirm the Authority Records show at least one ACTIVE docket for the type of operation you're booking, and that the Active Insurance card lists a current BIPD/Primary policy. A revoked authority or uninsured carrier cannot legally operate.
  3. Review safety rating and SMS BASIC scores. Check the carrier's FMCSA safety rating (if any) and the SMS BASIC table. A high percentile in any BASIC category — especially Unsafe Driving, HOS, or Vehicle Maintenance — is worth investigating before tendering a load.
  4. Examine inspection and crash history. Open the Inspection History and Crash History subpages for the full record. Look for patterns: repeat OOS findings on the same unit, multiple crashes in a short window, or violations clustered in one BASIC category.
  5. Cross-reference real-time data with FMCSA SAFER. For the most current snapshot — within 24 hours of any insurer filing or authority change — click through to the FMCSA SAFER lookup. TruckCodex mirrors SAFER and L&I daily; SAFER itself reflects filings within 24 hours.

Frequently asked questions about DIAMOND CORING CO INC

Is DIAMOND CORING CO INC an active motor carrier? ▾
Yes. DIAMOND CORING CO INC is registered with the FMCSA under USDOT 948584 and is currently shown as Active in the agency's Motor Carrier Management Information System (MCMIS). Active status means the carrier may legally operate, contingent on continuous insurance and authority filings.
What is DIAMOND CORING CO INC's safety rating? ▾
DIAMOND CORING CO INC is unrated. FMCSA assigns formal safety ratings only after a compliance review, and the agency has not yet completed one for this carrier. Being unrated is not by itself a red flag — most active carriers in the database are unrated. Review the inspection and BASIC data below to assess on-road performance.
How many inspections has DIAMOND CORING CO INC had? ▾
5 roadside inspections are on file for DIAMOND CORING CO INC in FMCSA's MCMIS database. Each inspection is summarized in the Inspection History section below — sortable by date, state, level, and out-of-service result. Newer inspections are pulled from the FMCSA SMS data feed daily.
What is DIAMOND CORING CO INC's out-of-service rate? ▾
DIAMOND CORING CO INC's peak out-of-service rate is 33.3% (whichever is higher of driver-OOS or vehicle-OOS, computed from FMCSA roadside inspection data). The national averages are roughly 6.7% for drivers and 23.4% for vehicles — see the peer-context card on this page for a side-by-side comparison.
Where is DIAMOND CORING CO INC based? ▾
DIAMOND CORING CO INC reports its physical address to the FMCSA as 11800 S EWING AVE, CHICAGO, Illinois 60617. Carriers must file a Form MCS-150 every two years to keep their address current; an outdated address is a common compliance flag.
Does DIAMOND CORING CO INC have valid operating authority? ▾
Yes. DIAMOND CORING CO INC holds 1 active FMCSA operating authority (MC406494). Each docket appears in the Authority Records section below with its full event history. Active authority means the carrier may legally operate as a for-hire carrier, contingent on current insurance and BOC-3 process-agent filings.
How many trucks and drivers does DIAMOND CORING CO INC operate? ▾
DIAMOND CORING CO INC self-reports 15 power units and 15 drivers on its most recent FMCSA Form MCS-150 filing. Power-unit and driver counts come from the carrier directly and are required to be updated every two years; very large fluctuations between filings can indicate fleet changes worth investigating.
Has DIAMOND CORING CO INC had any crashes? ▾
13 FMCSA-reportable crashes are on file for DIAMOND CORING CO INC in MCMIS. A reportable crash is one resulting in a fatality, an injury requiring transport for medical attention, or a vehicle disabled and towed from the scene. The full crash log is on the Crashes subpage with date, state, and outcome details.

About FMCSA carrier records

Every commercial motor carrier operating in the United States is required to register with the Federal Motor Carrier Safety Administration (FMCSA) and obtain a USDOT number. The USDOT number is a permanent, unique identifier — once assigned, it stays with the carrier for life and is never reissued to another company. Carriers must update their registration every two years on Form MCS-150 to keep their address, fleet size, and operating data current.

Carrier safety data lives in FMCSA's Motor Carrier Management Information System (MCMIS): roadside inspections, crashes, out-of-service findings, and the seven Behavior Analysis and Safety Improvement Categories (BASICs) that make up the SMS scoring methodology. For-hire carriers must also hold operating authority — an MC, FF, or MX docket number — which is separate from the USDOT number and requires continuous insurance and BOC-3 process-agent filings to remain active.

TruckCodex mirrors FMCSA's public SAFER and L&I systems on a daily refresh cycle. Every record on this page reflects what FMCSA has on file. We do not edit or modify carrier data — for real-time confirmation immediately before a transaction, click through to the FMCSA SAFER lookup linked in the related records section above. Safety ratings, when present, come from formal compliance reviews; most active carriers have not been reviewed and are correctly listed as unrated.

Data sources & freshness

TruckCodex aggregates official public-sector datasets. See the Source registry for dataset-level coverage and the Freshness log for last-import timestamps.

FMCSA

Census, SAFER, SMS, Licensing & Insurance (L&I), roadside inspections, crashes, and authority history.

Refreshed daily.
NHTSA

Vehicle recall campaigns, defect investigations, and consumer safety complaints (SCRS).

Refreshed daily.
EIA

Retail diesel and gasoline price history and state fuel-tax tables.

Refreshed weekly.
Transport Canada

Cross-border carrier registry and Canadian recall campaigns where applicable.

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TruckCodex is an independent aggregator; it is not affiliated with FMCSA, NHTSA, EIA, or Transport Canada. Always verify compliance-critical information directly with the originating agency.