# Relationship history for MSHA mine 1513048

Current hierarchy: **Derek  Potter; David W  Potter → Potter Mining Company Inc → No C-23 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Coleman Branson → No C-23 Mine; 1972-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Salyers Gene & William Stiltner → No C-23 Mine; 1977-03-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Stiltner & Salyers Coal Company → No C-23 Mine; 1981-08-01 to 1988-03-13; source msha-controller-operator-history
- **controller_controls_operator:** Salyers Gene & William Stiltner → Stiltner & Salyers Coal Company; 1981-08-01 to 1988-03-13; source msha-controller-operator-history
- **operator_operates_mine:** Ike Coal Company Inc → No C-23 Mine; 1988-03-14 to 1989-01-11; source msha-controller-operator-history
- **controller_controls_operator:** Coleman Branson → Ike Coal Company Inc; 1988-03-14 to 1989-01-11; source msha-controller-operator-history
- **controller_controls_mine:** David W  Potter et al → No C-23 Mine; 1988-11-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Potter Mining Company Inc → No C-23 Mine; 1989-01-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David W  Potter et al → Potter Mining Company Inc; 1989-01-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Derek  Potter et al → Potter Mining Company Inc; 1989-01-12 to current/open; source msha-controller-operator-history