# Relationship history for MSHA mine 3302476

Current hierarchy: **John M Ling → L&M MINERAL → ROMIG & LUIKART L & M MINERAL CO.**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** L&M Mineral → ROMIG & LUIKART L & M MINERAL CO.; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** E E Mullet Family  et al → ROMIG & LUIKART L & M MINERAL CO.; 1950-01-01 to 2022-01-02; source msha-controller-operator-history
- **controller_controls_operator:** E E Mullet Family  et al → L&M Mineral; 1950-01-01 to 2022-01-02; source msha-controller-operator-history
- **controller_controls_mine:** John M Ling → ROMIG & LUIKART L & M MINERAL CO.; 2022-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John M Ling → L&M Mineral; 2022-01-03 to current/open; source msha-controller-operator-history