# Relationship history for MSHA mine 1508108

Current hierarchy: **Tackett C E → Melody Mountain Coals Inc → No 74-5 Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Tackett C E → No 74-5 Mine; 1974-11-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Melody Mountain Coals Inc → No 74-5 Mine; 1975-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tackett C E → Melody Mountain Coals Inc; 1975-03-10 to current/open; source msha-controller-operator-history