# Relationship history for MSHA mine 3402098

Current hierarchy: **Steve P Murry; Patricia A Murry → Panther Sand and Materials LLC → Panther Sand and Materials LLC**

- 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:** Panther Sand Mine LLC → Panther Sand and Materials LLC; 2009-12-18 to 2020-12-01; source msha-controller-operator-history
- **controller_controls_mine:** Mike  Liddell et al → Panther Sand and Materials LLC; 2009-12-18 to 2017-02-15; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Liddell et al → Panther Sand Mine LLC; 2009-12-18 to 2017-02-15; source msha-controller-operator-history
- **controller_controls_mine:** Kevin  Lamb → Panther Sand and Materials LLC; 2017-02-16 to 2017-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Kevin  Lamb → Panther Sand Mine LLC; 2017-02-16 to 2017-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Mike  Liddell et al → Panther Sand and Materials LLC; 2018-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Liddell et al → Panther Sand Mine LLC; 2018-01-01 to 2020-12-01; source msha-controller-operator-history
- **operator_operates_mine:** Panther Sand and Materials LLC → Panther Sand and Materials LLC; 2020-12-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steve P Murry et al → Panther Sand and Materials LLC; 2020-12-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve P Murry et al → Panther Sand and Materials LLC; 2020-12-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patricia A Murry et al → Panther Sand and Materials LLC; 2020-12-02 to current/open; source msha-controller-operator-history