# Relationship history for MSHA mine 0102825

Current hierarchy: **Hyatt Pamela I & Michael L → P & M Sand & Gravel Inc → GOODWAY**

- 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:** Norris Sand & Gravel Inc → GOODWAY; 1989-10-01 to 1994-06-01; source msha-controller-operator-history
- **controller_controls_mine:** N W  Presley → GOODWAY; 1989-10-01 to 1994-06-01; source msha-controller-operator-history
- **controller_controls_operator:** N W  Presley → Norris Sand & Gravel Inc; 1989-10-01 to 1994-06-01; source msha-controller-operator-history
- **controller_controls_mine:** Hyatt Pamela I & Michael L → GOODWAY; 1993-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** P & M Sand & Gravel Inc → GOODWAY; 1994-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hyatt Pamela I & Michael L → P & M Sand & Gravel Inc; 1994-06-02 to current/open; source msha-controller-operator-history