# Relationship history for MSHA mine 3100002

Current hierarchy: **Charles S  Luck IV → Luck Stone Corporation → Mount Airy Plant**

- 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:** Ararat Rock Products → Mount Airy Plant; 1950-01-01 to 2021-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Charles S  Luck IV  et al → Mount Airy Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James H  Crossingham → Mount Airy Plant; 1950-01-01 to 2020-06-30; source msha-controller-operator-history
- **controller_controls_operator:** James H  Crossingham → Ararat Rock Products; 1950-01-01 to 2020-06-30; source msha-controller-operator-history
- **controller_controls_mine:** James H  Crossingham IV → Mount Airy Plant; 2020-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James H  Crossingham IV → Ararat Rock Products; 2020-07-01 to 2021-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Luck Stone Corporation → Mount Airy Plant; 2021-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles S  Luck IV  et al → Luck Stone Corporation; 2021-10-01 to current/open; source msha-controller-operator-history