# Relationship history for MSHA mine 1002167

Current hierarchy: **Melvin K  Toll; Herman  Hall → Hell or High Water Mining Corporation → Hell or High Water Mining Placer**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Hell or High Water Mining Corporation → Hell or High Water Mining Placer; 2008-07-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Melvin K  Toll et al → Hell or High Water Mining Placer; 2008-07-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Melvin K  Toll et al → Hell or High Water Mining Corporation; 2008-07-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Herman  Hall et al → Hell or High Water Mining Corporation; 2008-07-05 to current/open; source msha-controller-operator-history