# Relationship history for MSHA mine 1517792

Current hierarchy: **Elmer  Kincaid Jr → Kincaid Enterprises Inc → #2**

- 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

- **controller_controls_mine:** Robert Grover  Hunley et al → #2; 1992-09-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C T & L Coal Company → #2; 1996-05-01 to 2004-06-24; source msha-controller-operator-history
- **controller_controls_operator:** Robert Grover  Hunley et al → C T & L Coal Company; 1996-05-01 to 2004-06-24; source msha-controller-operator-history
- **controller_controls_mine:** Elmer  Kincaid Jr → #2; 2002-02-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kincaid Enterprises Inc → #2; 2004-06-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elmer  Kincaid Jr → Kincaid Enterprises Inc; 2004-06-25 to current/open; source msha-controller-operator-history