# Relationship history for MSHA mine 0103096

Current hierarchy: **Michael  Hollingshead → SRM Materials, LLC → SRM Mt Hope Quarry**

- 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

- **operator_operates_mine:** Flatrock Mining Corp → SRM Mt Hope Quarry; 1997-02-01 to 2009-12-15; source msha-controller-operator-history
- **controller_controls_mine:** Tim D  Pounders → SRM Mt Hope Quarry; 1997-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim D  Pounders → Flatrock Mining Corp; 1997-02-01 to 2009-12-15; source msha-controller-operator-history
- **operator_operates_mine:** MK Materials LLC → SRM Mt Hope Quarry; 2009-12-16 to 2021-01-20; source msha-controller-operator-history
- **controller_controls_mine:** Billy K  Mitchell et al → SRM Mt Hope Quarry; 2009-12-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Billy K  Mitchell et al → MK Materials LLC; 2009-12-16 to 2021-01-20; source msha-controller-operator-history
- **controller_controls_operator:** Bobby J  Keenum et al → MK Materials LLC; 2009-12-16 to 2021-01-20; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Hollingshead et al → SRM Mt Hope Quarry; 2013-12-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** SRM Materials, LLC → SRM Mt Hope Quarry; 2021-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Hollingshead et al → SRM Materials, LLC; 2021-01-21 to current/open; source msha-controller-operator-history