# Relationship history for MSHA mine 4603626

Current hierarchy: **Bright Richard D → Bird Loading Company Inc → Rosedale 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

- **operator_operates_mine:** Mon-Valley Mining Company → Rosedale Tipple; 1950-01-01 to 1977-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Tom J → Rosedale Tipple; 1950-01-01 to 1977-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Tom J → Mon-Valley Mining Company; 1950-01-01 to 1977-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Bird Loading Company Inc → Rosedale Tipple; 1977-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bright Richard D Et Al → Rosedale Tipple; 1977-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bright Richard D Et Al → Bird Loading Company Inc; 1977-04-01 to current/open; source msha-controller-operator-history