# Relationship history for MSHA mine 1514775

Current hierarchy: **Bowling Jess & Bobby → Cobo Mining Company → No1**

- 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:** Madjo Investors Inc → No1; 1984-08-01 to 1985-03-24; source msha-controller-operator-history
- **controller_controls_mine:** Madden Scott & Larry Joe Roberts → No1; 1984-08-01 to 1985-03-24; source msha-controller-operator-history
- **controller_controls_operator:** Madden Scott & Larry Joe Roberts → Madjo Investors Inc; 1984-08-01 to 1985-03-24; source msha-controller-operator-history
- **operator_operates_mine:** Cobo Mining Company → No1; 1985-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bowling Jess & Bobby → No1; 1985-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bowling Jess & Bobby → Cobo Mining Company; 1985-03-25 to current/open; source msha-controller-operator-history