# Relationship history for MSHA mine 4002110

Current hierarchy: **Harris Johnny → Briar Gap Coal Company → 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:** Industrial Processing Inc → No 1 Tipple; 1976-09-01 to 1979-10-08; source msha-controller-operator-history
- **controller_controls_mine:** Roger E  West → No 1 Tipple; 1976-09-01 to 1995-08-30; source msha-controller-operator-history
- **controller_controls_operator:** Roger E  West → Industrial Processing Inc; 1976-09-01 to 1979-10-08; source msha-controller-operator-history
- **controller_controls_mine:** Harris Johnny → No 1 Tipple; 1978-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Briar Gap Coal Company → No 1 Tipple; 1979-10-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harris Johnny → Briar Gap Coal Company; 1979-10-09 to current/open; source msha-controller-operator-history