# Relationship history for MSHA mine 4702872

Current hierarchy: **Mitchell D  Wilson → Mountain Stone Works LLC → Mountain Stone Works 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:** Mountain Stone Works Inc → Mountain Stone Works LLC; 1988-05-01 to 2010-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth  Bowman → Mountain Stone Works LLC; 1988-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth  Bowman → Mountain Stone Works Inc; 1988-05-01 to 2010-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Stone Corporation → Mountain Stone Works LLC; 2010-07-01 to 2022-04-05; source msha-controller-operator-history
- **controller_controls_mine:** Eric D  Campbell et al → Mountain Stone Works LLC; 2010-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eric D  Campbell et al → Mountain Stone Corporation; 2010-07-01 to 2022-04-05; source msha-controller-operator-history
- **controller_controls_operator:** Ryan  Campbell et al → Mountain Stone Corporation; 2010-07-01 to 2022-04-05; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Stone Works LLC → Mountain Stone Works LLC; 2022-04-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark D  Wilson et al → Mountain Stone Works LLC; 2022-04-06 to 2024-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Mark D  Wilson et al → Mountain Stone Works LLC; 2022-04-06 to 2024-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Mitchell D  Wilson et al → Mountain Stone Works LLC; 2022-04-06 to 2024-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Mitchell D  Wilson → Mountain Stone Works LLC; 2025-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mitchell D  Wilson → Mountain Stone Works LLC; 2025-01-01 to current/open; source msha-controller-operator-history