# Relationship history for MSHA mine 1508064

Current hierarchy: **Taylor Branch Coal Company → Taylor Branch Coal Company → No 1**

- 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:** Canton Charles → No 1; 1974-10-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Orison Coal Company Inc → No 1; 1975-01-01 to 1976-01-29; source msha-controller-operator-history
- **controller_controls_operator:** Canton Charles → Orison Coal Company Inc; 1975-01-01 to 1976-01-29; source msha-controller-operator-history
- **operator_operates_mine:** Taylor Branch Coal Company → No 1; 1976-01-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Taylor Branch Coal Company → No 1; 1976-01-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Taylor Branch Coal Company → Taylor Branch Coal Company; 1976-01-30 to current/open; source msha-controller-operator-history