# Relationship history for MSHA mine 0100820

Current hierarchy: **Haralson Daniel B → Southern States Coal Inc → Wegra 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:** Poe Coal Company → Wegra Strip; 1950-01-01 to 1976-06-21; source msha-controller-operator-history
- **controller_controls_mine:** Reid Norman → Wegra Strip; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reid Norman → Poe Coal Company; 1950-01-01 to 1976-06-21; source msha-controller-operator-history
- **operator_operates_mine:** Southern States Coal Inc → Wegra Strip; 1976-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Haralson Daniel B → Wegra Strip; 1976-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Haralson Daniel B → Southern States Coal Inc; 1976-06-22 to current/open; source msha-controller-operator-history