# Relationship history for MSHA mine 1202452

Current hierarchy: **Rogers Group Inc → Rogers Group Inc. → Martin County Stone**

- 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:** Rogers Group Inc → Martin County Stone; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Indian Creek Quarries LLC → Martin County Stone; 2011-11-29 to 2020-02-02; source msha-controller-operator-history
- **controller_controls_mine:** David  Graber et al → Martin County Stone; 2011-11-29 to 2017-09-28; source msha-controller-operator-history
- **controller_controls_operator:** David  Graber et al → Indian Creek Quarries LLC; 2011-11-29 to 2017-09-28; source msha-controller-operator-history
- **controller_controls_operator:** Kevin  Schnarr et al → Indian Creek Quarries LLC; 2011-11-29 to 2017-09-28; source msha-controller-operator-history
- **controller_controls_mine:** River Trading Company et al → Martin County Stone; 2017-09-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** River Trading Company et al → Indian Creek Quarries LLC; 2017-09-29 to 2020-02-02; source msha-controller-operator-history
- **controller_controls_operator:** Kevin  Schnarr et al → Indian Creek Quarries LLC; 2017-09-29 to 2020-02-02; source msha-controller-operator-history
- **controller_controls_operator:** David  Graber et al → Indian Creek Quarries LLC; 2017-09-29 to 2020-02-02; source msha-controller-operator-history
- **operator_operates_mine:** Rogers Group Inc. → Martin County Stone; 2020-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Group Inc → Rogers Group Inc.; 2020-02-03 to current/open; source msha-controller-operator-history