# Relationship history for MSHA mine 4001733

Current hierarchy: **Cox Connie & Mandel Nunley → Cox & Nunley Coal Company → Old Maxie Nunley Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Maxie Nunley Coal Company → Old Maxie Nunley Mine; 1975-01-01 to 1981-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Nunley Maxie → Old Maxie Nunley Mine; 1975-01-01 to 1981-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Nunley Maxie → Maxie Nunley Coal Company; 1975-01-01 to 1981-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Cox & Nunley Coal Company → Old Maxie Nunley Mine; 1981-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cox Connie & Mandel Nunley → Old Maxie Nunley Mine; 1981-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cox Connie & Mandel Nunley → Cox & Nunley Coal Company; 1981-05-01 to current/open; source msha-controller-operator-history