GroundRosterMad Dog TrenchworxLicensed
| Name | Mad Dog Trenchworx |
| Company | Leon Dorr |
| License number | 910 |
| License type | Certified System Installer |
| License status | Current - Maine DHHS roster, expires 2027-12-31 |
| License expires | 2027-12-31 |
| Based in | Madison, Somerset County, Maine 04950 |
| Phone | (207) 424-2639 |
"Based in" is the city and county of the address on the business's state license record. That can be a mailing address; it doesn't tell you where the business works.
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What this license covers
- Installation / repair: licensed to build and install septic tanks and drainfields, and to repair or replace failed ones.
How to verify this license
We publish the license details exactly as they appear in Maine's official licensing records; we do not vouch for the business itself. Before hiring, look up license #910 directly with the state, confirm it is still active, and ask for a current certificate of insurance.
Source: Maine DHHS - Certified System Installers, last checked 2026-08-17. Verify at the official source.
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