# Relationship history for MSHA mine 4001096

Current hierarchy: **Kelley Norma Dean → Global Minerals & Fossil Fuels Development Inc → Red Ash 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:** Dean Coal Company → Red Ash Tipple; 1950-01-01 to 1982-10-17; source msha-controller-operator-history
- **controller_controls_mine:** Ross Ralph M → Red Ash Tipple; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ross Ralph M → Dean Coal Company; 1950-01-01 to 1982-10-17; source msha-controller-operator-history
- **operator_operates_mine:** Global Minerals & Fossil Fuels Development Inc → Red Ash Tipple; 1982-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kelley Norma Dean → Red Ash Tipple; 1982-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kelley Norma Dean → Global Minerals & Fossil Fuels Development Inc; 1982-10-18 to current/open; source msha-controller-operator-history