# Relationship history for MSHA mine 1510376

Current hierarchy: **Ranier Harry Hale → Supreme Elkhorn Mining Company Inc → No 1 Tipple**

- 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:** Ray Holbrook → No 1 Tipple; 1977-04-01 to 1980-04-28; source msha-controller-operator-history
- **controller_controls_mine:** Holbrook Ray → No 1 Tipple; 1977-04-01 to 1980-04-28; source msha-controller-operator-history
- **controller_controls_operator:** Holbrook Ray → Ray Holbrook; 1977-04-01 to 1980-04-28; source msha-controller-operator-history
- **operator_operates_mine:** Supreme Elkhorn Mining Company Inc → No 1 Tipple; 1980-04-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ranier Harry Hale → No 1 Tipple; 1980-04-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ranier Harry Hale → Supreme Elkhorn Mining Company Inc; 1980-04-29 to current/open; source msha-controller-operator-history