# Relationship history for MSHA mine 0203106

Current hierarchy: **Wendi L Tanner; Maurice R Tanner → M.R. Tanner Rock and Sand LLC → Tanner/Rankin Pit**

- 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

- **controller_controls_mine:** Maurice R  Tanner Jr → Tanner/Rankin Pit; 1997-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** M.R. Tanner Mining Inc → Tanner/Rankin Pit; 2005-11-07 to 2025-02-11; source msha-controller-operator-history
- **controller_controls_operator:** Maurice R  Tanner Jr → M.R. Tanner Mining Inc; 2005-11-07 to 2025-02-11; source msha-controller-operator-history
- **operator_operates_mine:** M.R. Tanner Rock and Sand LLC → Tanner/Rankin Pit; 2025-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Maurice R Tanner et al → Tanner/Rankin Pit; 2025-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Maurice R Tanner et al → M.R. Tanner Rock and Sand LLC; 2025-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wendi L Tanner et al → M.R. Tanner Rock and Sand LLC; 2025-02-12 to current/open; source msha-controller-operator-history