# Relationship history for MSHA mine 4401261

Current hierarchy: **Gulf + Western Industries Inc & Raven Smokeless Co → Raven Anchor Smokeless Coal Company → Central Prep 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:** Raven Smokeless Coal Company → Central Prep Plant; 1950-01-01 to 1974-11-07; source msha-controller-operator-history
- **controller_controls_mine:** Lipps Robert → Central Prep Plant; 1950-01-01 to 1975-03-11; source msha-controller-operator-history
- **controller_controls_operator:** Lipps Robert → Raven Smokeless Coal Company; 1950-01-01 to 1974-11-07; source msha-controller-operator-history
- **operator_operates_mine:** Raven Smokeless Coal Company Inc → Central Prep Plant; 1974-11-08 to 1977-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Samuels John S Iii → Central Prep Plant; 1974-11-08 to 1977-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Samuels John S Iii → Raven Smokeless Coal Company Inc; 1974-11-08 to 1977-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Gulf + Western Industries Inc & Raven Smokeless Co → Central Prep Plant; 1976-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Raven Anchor Smokeless Coal Company → Central Prep Plant; 1977-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gulf + Western Industries Inc & Raven Smokeless Co → Raven Anchor Smokeless Coal Company; 1977-07-01 to current/open; source msha-controller-operator-history