# Relationship history for MSHA mine 1700882

Current hierarchy: **John L  Hart → Hartland, Inc. → Hart 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:** Hartland, Inc. → Hart Pit; 2011-10-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John L  Hart → Hart Pit; 2011-10-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John L  Hart → Hartland, Inc.; 2011-10-26 to current/open; source msha-controller-operator-history