# Relationship history for MSHA mine 4404088

Current hierarchy: **Koch Industries Inc → Matador Coal Company → Raven #2 Preparation 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:** Winmarleigh Mining Corp → Raven #2 Preparation Plant; 1975-01-01 to 1979-01-30; source msha-controller-operator-history
- **controller_controls_mine:** Ratliff Arthur M Jr → Raven #2 Preparation Plant; 1975-01-01 to 1979-01-30; source msha-controller-operator-history
- **controller_controls_operator:** Ratliff Arthur M Jr → Winmarleigh Mining Corp; 1975-01-01 to 1979-01-30; source msha-controller-operator-history
- **operator_operates_mine:** Todmorden Corp → Raven #2 Preparation Plant; 1979-01-31 to 1982-04-06; source msha-controller-operator-history
- **controller_controls_mine:** Koch Industries Inc → Raven #2 Preparation Plant; 1979-01-31 to 1982-04-06; source msha-controller-operator-history
- **controller_controls_operator:** Koch Industries Inc → Todmorden Corp; 1979-01-31 to 1982-04-06; source msha-controller-operator-history
- **controller_controls_mine:** Deskins Gerald-Lando Deel Et Al → Raven #2 Preparation Plant; 1981-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Virginia Fuels Inc → Raven #2 Preparation Plant; 1982-04-07 to 1983-01-25; source msha-controller-operator-history
- **controller_controls_operator:** Deskins Gerald-Lando Deel Et Al → Virginia Fuels Inc; 1982-04-07 to 1983-01-25; source msha-controller-operator-history
- **operator_operates_mine:** Matador Coal Company → Raven #2 Preparation Plant; 1983-01-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Koch Industries Inc → Raven #2 Preparation Plant; 1983-01-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Koch Industries Inc → Matador Coal Company; 1983-01-26 to current/open; source msha-controller-operator-history