# Relationship history for MSHA mine 4400081

Current hierarchy: **Rogers Group Inc → Rogers Group Inc. → Flatrock 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

- **controller_controls_mine:** Rogers Group Inc → Flatrock Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C S Mundy Quarries Inc → Flatrock Quarry; 1950-01-01 to 1981-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Thomas → Flatrock Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Thomas → C S Mundy Quarries Inc; 1950-01-01 to 1981-05-31; source msha-controller-operator-history
- **operator_operates_mine:** C S Mundy Quarries Inc → Flatrock Quarry; 1981-06-01 to 2011-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Eagle Corp → Flatrock Quarry; 1981-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eagle Corp → C S Mundy Quarries Inc; 1981-06-01 to 2011-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Mundy Stone Company → Flatrock Quarry; 2011-07-01 to 2026-06-04; source msha-controller-operator-history
- **controller_controls_mine:** David D  Willis → Flatrock Quarry; 2011-07-01 to 2016-05-17; source msha-controller-operator-history
- **controller_controls_operator:** David D  Willis → Mundy Stone Company; 2011-07-01 to 2016-05-17; source msha-controller-operator-history
- **controller_controls_mine:** Willis Trust et al → Flatrock Quarry; 2016-05-18 to 2016-09-05; source msha-controller-operator-history
- **controller_controls_operator:** Willis Trust et al → Mundy Stone Company; 2016-05-18 to 2016-09-05; source msha-controller-operator-history
- **controller_controls_mine:** Rockydale Quarries Corporation → Flatrock Quarry; 2016-09-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rockydale Quarries Corporation → Mundy Stone Company; 2016-09-06 to 2026-06-04; source msha-controller-operator-history
- **operator_operates_mine:** Rogers Group Inc. → Flatrock Quarry; 2026-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Group Inc → Rogers Group Inc.; 2026-06-05 to current/open; source msha-controller-operator-history