# Relationship history for MSHA mine 1508178

Current hierarchy: **Western Coal Corp → Little Delta Mining Company Inc → No 1 Tipple**

- 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

- **controller_controls_mine:** Goeglein Albert-Charles & Avery → No 1 Tipple; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Goeglein Coal Company → No 1 Tipple; 1975-03-31 to 1976-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Goeglein Albert-Charles & Avery → Goeglein Coal Company; 1975-03-31 to 1976-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Little Delta Mining Company Inc → No 1 Tipple; 1976-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Western Coal Corp → No 1 Tipple; 1976-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Western Coal Corp → Little Delta Mining Company Inc; 1976-06-01 to current/open; source msha-controller-operator-history