# Relationship history for MSHA mine 1701163

Current hierarchy: **Parker  Gardner → Gardner Road Company → Keene Pit**

- 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:** Gardner Road Company → Keene Pit; 2025-07-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Parker  Gardner → Keene Pit; 2025-07-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Parker  Gardner → Gardner Road Company; 2025-07-03 to current/open; source msha-controller-operator-history