# Relationship history for MSHA mine 3400955

Current hierarchy: **Rippy Adair → Rippy Mining Company Inc → Othel Gamble 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Rippy Mining Company Inc → Othel Gamble Strip; 1976-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rippy Adair → Othel Gamble Strip; 1976-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rippy Adair → Rippy Mining Company Inc; 1976-04-01 to current/open; source msha-controller-operator-history