# Relationship history for MSHA mine 4607132

Current hierarchy: **Hunter Ernie → Double N Mining Inc → Surface Mine 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:** Crawford Lewis C Jr → Surface Mine No 1; 1984-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Milem Homer → Surface Mine No 1; 1985-06-01 to 1988-09-11; source msha-controller-operator-history
- **operator_operates_mine:** H & D Coal Company → Surface Mine No 1; 1986-06-01 to 1988-09-11; source msha-controller-operator-history
- **controller_controls_operator:** Milem Homer → H & D Coal Company; 1986-06-01 to 1988-09-11; source msha-controller-operator-history
- **operator_operates_mine:** Rupert Feed & Supply Inc → Surface Mine No 1; 1988-09-12 to 1989-10-01; source msha-controller-operator-history
- **controller_controls_operator:** Crawford Lewis C Jr → Rupert Feed & Supply Inc; 1988-09-12 to 1989-10-01; source msha-controller-operator-history
- **operator_operates_mine:** Double N Mining Inc → Surface Mine No 1; 1989-10-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hunter Ernie Et Al → Surface Mine No 1; 1989-10-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hunter Ernie Et Al → Double N Mining Inc; 1989-10-02 to current/open; source msha-controller-operator-history