# Relationship history for MSHA mine 1510187

Current hierarchy: **Reading & Bates Corp → Golden Oak Mining Company Inc → No 6 Processing Plant**

- 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:** Gem Elkhorn Coal Company Inc → No 6 Processing Plant; 1977-01-01 to 1983-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Price Seldom W → No 6 Processing Plant; 1977-01-01 to 1983-02-14; source msha-controller-operator-history
- **controller_controls_operator:** Price Seldom W → Gem Elkhorn Coal Company Inc; 1977-01-01 to 1983-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Reading & Bates Corp → No 6 Processing Plant; 1981-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Golden Oak Mining Company Inc → No 6 Processing Plant; 1983-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reading & Bates Corp → Golden Oak Mining Company Inc; 1983-02-15 to current/open; source msha-controller-operator-history