# Relationship history for MSHA mine 1001863

Current hierarchy: **Marie  Teague → Teague Mineral Products → CH Pit (Chrisman Hill)**

- 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:** Marie  Teague → CH Pit (Chrisman Hill); 1986-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Teague Mineral Products → CH Pit (Chrisman Hill); 1990-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marie  Teague → Teague Mineral Products; 1990-05-01 to current/open; source msha-controller-operator-history