GroundRosterBasin Construction AndLicensed
| Name | Basin Construction And |
| Company | Blake F Koistinen |
| License type | Septic Installer |
| License status | Licensed — SD Plumbing Commission |
| Location | Hayti, South Dakota |
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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 this listing exactly as it appears in South Dakota's official licensing records; we do not vouch for the business itself. Before hiring, look up this license directly with the state, confirm it is still active, and ask for a current certificate of insurance.
Source: South Dakota Plumbing Commission - Licensed Septic Installers, last checked 2026-08-17. Verify at the official source.
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