# Relationship history for MSHA mine 0101653

Current hierarchy: **White W R → W & D Mining Company Inc → No 1 Strip**

- 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:** Dugout Valley Mining Company Inc → No 1 Strip; 1976-12-01 to 1977-05-19; source msha-controller-operator-history
- **controller_controls_mine:** Hammonds J E → No 1 Strip; 1976-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hammonds J E → Dugout Valley Mining Company Inc; 1976-12-01 to 1977-05-19; source msha-controller-operator-history
- **operator_operates_mine:** W & D Mining Company Inc → No 1 Strip; 1977-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** White W R → No 1 Strip; 1977-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** White W R → W & D Mining Company Inc; 1977-05-20 to current/open; source msha-controller-operator-history