Rule Steel Tanks Inc

Doing business as Diamond Z Manufacturing

USDOT activeAuthority activeCarrier & Cargo tank · Interstate

USDOT684292
MC583264
LocationCaldwell, ID
Phone(208) 585-3031
Fleet3 power units · 3 drivers

Rule Steel Tanks Inc (USDOT 684292, MC-583264) is an interstate motor carrier based in Caldwell, Idaho with 3 power units and 3 drivers reported to FMCSA. Its USDOT number and operating authority are active. FMCSA records list 1 roadside inspection in the last 24 months.

Verification snapshot · FMCSA data as of Nov 12, 2026

Operating authorityActive · MC-583264Carrier, Cargo tank Liability insurance$750,000 on fileRequired: $750,000 · as of May 2026 Safety ratingNot rated1 inspections in 24 months Out-of-service ordersNone on fileFMCSA out-of-service orders file Registration (MCS-150)Updated Feb 5, 20269 months ago Process agent (BOC-3)On fileService of Process Agents, Inc.

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Operating authority

Status from the FMCSA Company Census File, November 12, 2026

Docket	Authority type	Status
MC-583264	Common carrier	Active

First granted on December 1, 2006 · see full authority history.

Insurance

FMCSA legacy licensing records (last updated May 2026); filings may have changed since

Liability (BIPD) required$750,000
Liability (BIPD) on file$750,000
Cargo insurance required / on fileNo / No
Bond required / on fileNo / No

Filings on file

Type	Insurer	Coverage	Effective
Liability (BIPD) BMC-91X	The Cincinnati Casualty Company	$750,000	Oct 13, 2019

Insurance history: 5 past filings

Type	Insurer	Effective	Ended	Reason
Liability (BIPD)	The Cincinnati Insurance Co.	Jul 22, 2009	Oct 13, 2019	Replaced
Cargo	The Cincinnati Insurance Co.	Jul 22, 2009	Nov 2, 2019	Cancel
Cargo	Travelers Property Casualty Co. of America	Jan 1, 2009	Aug 4, 2009	Term / cancl
Cargo	Travelers Property Casualty Co. of America	Nov 13, 2006	Jan 1, 2009	Replaced
Liability (BIPD)	Travelers Property Casualty Co. of America	Nov 10, 2006	Aug 4, 2009	Term / cancl

Process agent (BOC-3)

Service of Process Agents, Inc., Memphis, TN

Inspections and crashes

Last 24 months · FMCSA Vehicle Inspection File and Crash File

1
Inspections: 0.0%
Driver out-of-service: 100.0%
Vehicle out-of-service: 1
Crashes

Inspected most often in: Idaho (1).

Most recent inspection on file: August 28, 2026.

FMCSA safety rating: Not rated

Inspection and crash counts come from FMCSA records and are shown as reported. They are not a safety rating. A crash record does not mean the carrier was at fault. FMCSA has not rated a carrier unless a safety rating is listed. For FMCSA’s own data and its explanation, see the FMCSA SAFER Company Snapshot.

Out-of-service rates are calculated by CheckTrucking from inspection records (driver: levels I, II, III, VI; vehicle: levels I, II, V, VI). They are not FMCSA scores.

Authority history

FMCSA licensing records (Motus and legacy L&I) · migration-only status adjustments are not shown

July 2, 2009Involuntary revocation — Common carrier authorityDiscontinued revocation on July 28, 2009
December 1, 2006Granted — Common carrier authority

Fleet and operations

From the company’s own registration (Form MCS-150), updated February 5, 2026

Power units: 3
Trucks: 3
Tractors owned: 3
Trailers owned: 8
Drivers: 3
CDL drivers: 3
Interstate drivers: 3
Miles traveled: 120,000 (2024)
Classification: Authorized for hire
Hazardous materials: No
USDOT registered: April 7, 1997
Address: 11310 Bass Lane, Caldwell, ID 83605
Phone (registered with FMCSA): (208) 585-3031

Cargo carried

General freight
Household goods
Metal: sheets, coils, rolls
Driveaway / towaway
Logs, poles, beams, lumber
Building materials
Machinery, large objects
Liquids / gases
Grain, feed, hay
Paper products
Utilities
Agricultural / farm supplies
Construction

Key facts

USDOT number 684292 was registered on April 7, 1997.
Operating authority MC-583264 was first granted on December 1, 2006.
The company last updated its FMCSA registration (Form MCS-150) on February 5, 2026.
It reported 120,000 vehicle miles traveled in 2024.
One insurance filing is on file in FMCSA’s legacy licensing records (as of May 2026), including Liability (BIPD) coverage with The Cincinnati Casualty Company.
It had 1 roadside inspection in the last 24 months; 0 inspections recorded no violations.
FMCSA records list 1 reportable crash in the last 24 months.
Its process agent filing (BOC-3) is with Service of Process Agents, Inc..

Other carriers in Caldwell, ID

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