# Relationship history for MSHA mine 1102884

Current hierarchy: **Gloria  Sickmeier → Mid-Continental Fuels Inc → Marion #2 Slurry 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

- **operator_operates_mine:** Mid-Continental Fuels Inc → Marion #2 Slurry Pit; 1989-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gloria  Sickmeier → Marion #2 Slurry Pit; 1989-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gloria  Sickmeier → Mid-Continental Fuels Inc; 1989-07-01 to current/open; source msha-controller-operator-history