# Relationship history for MSHA mine 3102113

Current hierarchy: **Preston L  Dixon → Preston Dixon Mining → Preston Dixon Mining**

- 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:** Deerwater Minerals → Preston Dixon Mining; 1995-10-01 to 2007-04-12; source msha-controller-operator-history
- **controller_controls_mine:** Wiley  Phipps → Preston Dixon Mining; 1995-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wiley  Phipps → Deerwater Minerals; 1995-10-01 to 2007-04-12; source msha-controller-operator-history
- **operator_operates_mine:** Preston Dixon Mining → Preston Dixon Mining; 2007-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Preston L  Dixon → Preston Dixon Mining; 2007-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Preston L  Dixon → Preston Dixon Mining; 2007-04-13 to current/open; source msha-controller-operator-history