# Relationship history for MSHA mine 4405413

Current hierarchy: **Zambacca Richard → R J B 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

- **controller_controls_mine:** Deel Carmel & Odell Et Al → No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Deel Brothers Coal Company Inc → No 1; 1980-04-01 to 1980-10-20; source msha-controller-operator-history
- **controller_controls_operator:** Deel Carmel & Odell Et Al → Deel Brothers Coal Company Inc; 1980-04-01 to 1980-10-20; source msha-controller-operator-history
- **operator_operates_mine:** R J B Mining Inc → No 1; 1980-10-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Zambacca Richard Et Al → No 1; 1980-10-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Zambacca Richard Et Al → R J B Mining Inc; 1980-10-21 to current/open; source msha-controller-operator-history