# Relationship history for MSHA mine 3609072

Current hierarchy: **Jefferson  Martin; Susan  Deikman → Cruz Bay Trading Inc → Rocky Top Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** H & M Coal Contracting → Rocky Top Mine; 2002-04-15 to 2004-04-18; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Madenford et al → Rocky Top Mine; 2002-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Madenford et al → H & M Coal Contracting; 2002-04-15 to 2004-04-18; source msha-controller-operator-history
- **operator_operates_mine:** J & J Coal Co → Rocky Top Mine; 2004-04-19 to 2008-07-22; source msha-controller-operator-history
- **controller_controls_mine:** John M  Steckley → Rocky Top Mine; 2004-04-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John M  Steckley → J & J Coal Co; 2004-04-19 to 2008-07-22; source msha-controller-operator-history
- **controller_controls_mine:** Jefferson  Martin  et al → Rocky Top Mine; 2005-09-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cruz Bay Trading Inc → Rocky Top Mine; 2008-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jefferson  Martin  et al → Cruz Bay Trading Inc; 2008-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Susan  Deikman  et al → Cruz Bay Trading Inc; 2008-07-23 to current/open; source msha-controller-operator-history