# Relationship history for MSHA mine 2600826

Current hierarchy: **Earl D  Harrison; Laraine  Griesel → Harrison Mining → Independence 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:** Silver King Mines Inc → Independence Mine; 1950-01-01 to 1982-06-27; source msha-controller-operator-history
- **controller_controls_mine:** Silver King Mines Inc → Independence Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Silver King Mines Inc → Silver King Mines Inc; 1950-01-01 to 1982-06-27; source msha-controller-operator-history
- **operator_operates_mine:** United Mining Corp → Independence Mine; 1982-06-28 to 1985-11-06; source msha-controller-operator-history
- **controller_controls_mine:** Collins Timothy & Earl Haldeman → Independence Mine; 1982-06-28 to 1985-11-06; source msha-controller-operator-history
- **controller_controls_operator:** Collins Timothy & Earl Haldeman → United Mining Corp; 1982-06-28 to 1985-11-06; source msha-controller-operator-history
- **controller_controls_mine:** Laraine  Griesel et al → Independence Mine; 1985-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Harrison Mining → Independence Mine; 1985-11-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Laraine  Griesel et al → Harrison Mining; 1985-11-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Earl D  Harrison et al → Harrison Mining; 1985-11-07 to current/open; source msha-controller-operator-history