# Relationship history for MSHA mine 2302371

Current hierarchy: **HBM Holdings Company → MLC → MLC - Bonne Terre**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Margaret J  Heckman  et al → MLC - Bonne Terre; 1950-01-01 to 2022-09-06; source msha-controller-operator-history
- **controller_controls_mine:** Jomico LLC → MLC - Bonne Terre; 2007-10-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Missouri Lime LLC → MLC - Bonne Terre; 2007-11-22 to 2010-09-23; source msha-controller-operator-history
- **controller_controls_operator:** Jomico LLC → Missouri Lime LLC; 2007-11-22 to 2010-09-23; source msha-controller-operator-history
- **operator_operates_mine:** Valley Minerals, LLC → MLC - Bonne Terre; 2010-09-24 to 2022-09-06; source msha-controller-operator-history
- **controller_controls_mine:** Paul  Melnuk et al → MLC - Bonne Terre; 2010-09-24 to 2015-04-29; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Melnuk et al → Valley Minerals, LLC; 2010-09-24 to 2015-04-29; source msha-controller-operator-history
- **controller_controls_operator:** Tom  Hillman et al → Valley Minerals, LLC; 2010-09-24 to 2015-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Thomas  Hillman → MLC - Bonne Terre; 2015-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas  Hillman → Valley Minerals, LLC; 2015-04-30 to 2022-09-06; source msha-controller-operator-history
- **operator_operates_mine:** MLC → MLC - Bonne Terre; 2022-09-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** HBM Holdings Company → MLC - Bonne Terre; 2022-09-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** HBM Holdings Company → MLC; 2022-09-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Margaret J  Heckman  et al → MLC; 2022-09-07 to 2022-09-06; source msha-controller-operator-history