# Relationship history for MSHA mine 1600792

Current hierarchy: **Genovese C R → Gee Gee Ranch → Gee Gee Ranch**

- 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:** Mc Kay Sand & Gravel → Gee Gee Ranch; 1950-01-01 to 1980-02-24; source msha-controller-operator-history
- **controller_controls_mine:** Charles D  McKay → Gee Gee Ranch; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles D  McKay → Mc Kay Sand & Gravel; 1950-01-01 to 1980-02-24; source msha-controller-operator-history
- **operator_operates_mine:** Gee Gee Ranch → Gee Gee Ranch; 1980-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Genovese C R → Gee Gee Ranch; 1980-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Genovese C R → Gee Gee Ranch; 1980-02-25 to current/open; source msha-controller-operator-history