# Relationship history for MSHA mine 3604288

Current hierarchy: **Glenwood Homes Inc → Pine Creek Coal Company Inc → Kawalski Strip**

- 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:** Galando Coal Co Inc → Kawalski Strip; 1950-01-01 to 1978-06-06; source msha-controller-operator-history
- **controller_controls_mine:** Galando Coal Co Inc → Kawalski Strip; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Galando Coal Co Inc → Galando Coal Co Inc; 1950-01-01 to 1978-06-06; source msha-controller-operator-history
- **operator_operates_mine:** Pine Creek Coal Company Inc → Kawalski Strip; 1978-06-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Glenwood Homes Inc → Kawalski Strip; 1978-06-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Glenwood Homes Inc → Pine Creek Coal Company Inc; 1978-06-07 to current/open; source msha-controller-operator-history