# Relationship history for MSHA mine 0600582

Current hierarchy: **Lawler Peter → American Heritage Stone Inc → American Heritage Stone Incorporated**

- 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:** Bolton Notch Quarry Company → American Heritage Stone Incorporated; 1978-03-09 to 1985-06-16; source msha-controller-operator-history
- **controller_controls_mine:** Gonder Henry → American Heritage Stone Incorporated; 1978-03-09 to 1985-06-16; source msha-controller-operator-history
- **controller_controls_operator:** Gonder Henry → Bolton Notch Quarry Company; 1978-03-09 to 1985-06-16; source msha-controller-operator-history
- **operator_operates_mine:** Bolton Stone Inc → American Heritage Stone Incorporated; 1985-06-17 to 1987-06-03; source msha-controller-operator-history
- **controller_controls_mine:** Maker David P → American Heritage Stone Incorporated; 1985-06-17 to 1987-06-03; source msha-controller-operator-history
- **controller_controls_operator:** Maker David P → Bolton Stone Inc; 1985-06-17 to 1987-06-03; source msha-controller-operator-history
- **operator_operates_mine:** American Heritage Stone Inc → American Heritage Stone Incorporated; 1987-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lawler Peter → American Heritage Stone Incorporated; 1987-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lawler Peter → American Heritage Stone Inc; 1987-06-04 to current/open; source msha-controller-operator-history