# Relationship history for MSHA mine 4604552

Current hierarchy: **Addair Wayne & Darrell → Prosperity Mining Inc → 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

- **operator_operates_mine:** Debby Coal Company → No 1; 1975-01-01 to 1985-07-22; source msha-controller-operator-history
- **controller_controls_mine:** Cline Deborah → No 1; 1975-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cline Deborah → Debby Coal Company; 1975-01-01 to 1985-07-22; source msha-controller-operator-history
- **controller_controls_mine:** Burton Bill → No 1; 1984-12-06 to 1985-10-04; source msha-controller-operator-history
- **operator_operates_mine:** Burton Coal Company Inc → No 1; 1985-07-23 to 1985-10-04; source msha-controller-operator-history
- **controller_controls_operator:** Burton Bill → Burton Coal Company Inc; 1985-07-23 to 1985-10-04; source msha-controller-operator-history
- **operator_operates_mine:** Prosperity Mining Inc → No 1; 1985-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Addair Wayne & Darrell → No 1; 1985-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Addair Wayne & Darrell → Prosperity Mining Inc; 1985-10-05 to current/open; source msha-controller-operator-history