# Relationship history for MSHA mine 1001918

Current hierarchy: **Eric Gregory  Klepfer → MCKINLEY MINE INC → McKinley 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

- **operator_operates_mine:** Mixitron Inc → McKinley Mine; 1996-03-01 to 2006-11-26; source msha-controller-operator-history
- **controller_controls_mine:** Chris  Bailey → McKinley Mine; 1996-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chris  Bailey → Mixitron Inc; 1996-03-01 to 2006-11-26; source msha-controller-operator-history
- **operator_operates_mine:** Caldera LLC → McKinley Mine; 2006-11-27 to 2019-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Darrel E  Cox  et al → McKinley Mine; 2006-11-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darrel E  Cox  et al → Caldera LLC; 2006-11-27 to 2019-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Matthew  Miller  et al → Caldera LLC; 2006-11-27 to 2019-05-31; source msha-controller-operator-history
- **operator_operates_mine:** MCKINLEY MINE, INC → McKinley Mine; 2019-06-01 to 2026-07-01; source msha-controller-operator-history
- **controller_controls_mine:** P M & Gold Mine Inc → McKinley Mine; 2019-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** P M & Gold Mine Inc → MCKINLEY MINE, INC; 2019-06-01 to 2026-07-01; source msha-controller-operator-history
- **operator_operates_mine:** MCKINLEY MINE INC → McKinley Mine; 2026-07-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Eric Gregory  Klepfer → McKinley Mine; 2026-07-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eric Gregory  Klepfer → MCKINLEY MINE INC; 2026-07-02 to current/open; source msha-controller-operator-history