# Austin Powder Company — Hazardous Materials Safety Interpretation

**Citation:** 08-0126  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2008-06-17

08-0126 response to Austin Powder Company concerning 177.848.

## Document text

<<<PAGE 1>>>

U.S. Department
of Transportation
Pipeline and Hazardous
Materials Safety
Administration
JUN 1 '7 2008
Mr. Larry J. (Scooter) King
Regulatory Manager
Austin Powder Company
25800 Science Park Drive
Cleveland, Ohio 44 1 22
1200 New Jersey Avenue, SE
Washington, D.C. 20590
Ref. No. 08-0126
Dear Mr. King:
This responds to your letter requesting clarification of the segregation requirements for certain
explosives under the Hazardous Materials Regulations (HMR; 49 CFR Parts 17 1 - 1 80).
Specifically, you ask whether an explosive item classed as a Division 1.4D may be
transported on the same transport vehicle as detonators.
The answer is yes. Except as otherwise specified, the provisions of 5 177.848(g)(3)(iv) apply
to detonators transported on the same transport vehicle with Division 1.1, 1.2, 1.3 material.
An explosive item classed as a Division 1.4D may be transported on the same transport
vehicle as a detonator.
I trust this satisfies your inquiry. Please contact us if we can be of further assistance.
Sincerely,
Hattie L. Mitchell
Chief, Regulatory Review and Reinvention
Office of Hazardous Materials Standards

<<<PAGE 2>>>

AUSTIN POWDER COMPANY 9 11 7.84 f
CLEVELAND, OHIO 44 122
April 29, 2008
U. S. Department of Transportation
Pipeline and Hazardous Materials Safety Administration PHH-10
Office of Hazardous Materials Standards
1200 New Jersey Avenue, SE East Building, 2" Floor
Washington, DG 20590-0001
Dear SirlMadarn:
I have reviewed 177.848 and in the chart for explosives there is an X and a 4 when
comparing a D with a B. The 4 1 understand tells rne to review 177.835(g). In reading
this paragraph it is plain that detonators are not allowed to be transported with any 1 .I,
1.2, 1.3 or 1.5 unless the provisions of (g) (I), (2) or (3) are met.
As I understand, because there is no reference to 1.4 that items that are approved and
Classed as 1.4D may be transported with detonators. Is this correct?
Sincerely,
-
Larry 1 (Scooter) King
Regulatory Manager
25800 SCIENCE PARK DRIVE CLEVELAND, OHIO 441 22 21 61464-2400

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2008/080126.pdf>
- Source ID: `phmsa`
- SHA-256: `053e1f33cb78fdb7a747fca3913d7045acb8d5e791ffeedd353696112e08c3e6`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-23T05:13:42.230Z
- Document slug: `phmsa-interpretation-08-0126`

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