# Relationship history for MSHA mine 4500001

Current hierarchy: **Ransom  Metivier; Doug  Dawson → Allied Minerals Co → Plant 1**

- 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:** Allied Minerals Inc → Plant 1; 1950-01-01 to 1989-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Ernest  Gehrke → Plant 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ernest  Gehrke → Allied Minerals Inc; 1950-01-01 to 1989-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Allied Minerals Inc → Plant 1; 1989-04-01 to 1990-01-07; source msha-controller-operator-history
- **controller_controls_mine:** Dale E  Hirschfeld → Plant 1; 1989-04-01 to 1990-01-07; source msha-controller-operator-history
- **controller_controls_operator:** Dale E  Hirschfeld → Allied Minerals Inc; 1989-04-01 to 1990-01-07; source msha-controller-operator-history
- **operator_operates_mine:** Allied Minerals Inc → Plant 1; 1990-01-08 to 2010-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Ernest  Gehrke → Allied Minerals Inc; 1990-01-08 to 2010-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Allied Minerals Inc → Plant 1; 2010-08-01 to 2016-01-22; source msha-controller-operator-history
- **controller_controls_mine:** Dale B  Borgford → Plant 1; 2010-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dale B  Borgford → Allied Minerals Inc; 2010-08-01 to 2016-01-22; source msha-controller-operator-history
- **operator_operates_mine:** Allied Minerals Co → Plant 1; 2016-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Duane A  Dawson et al → Plant 1; 2016-01-23 to 2024-12-25; source msha-controller-operator-history
- **controller_controls_operator:** Duane A  Dawson et al → Allied Minerals Co; 2016-01-23 to 2024-12-25; source msha-controller-operator-history
- **controller_controls_operator:** Douglas E  Dawson et al → Allied Minerals Co; 2016-01-23 to 2024-12-25; source msha-controller-operator-history
- **controller_controls_mine:** Ransom  Metivier → Plant 1; 2024-12-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ransom  Metivier → Allied Minerals Co; 2024-12-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Doug  Dawson → Allied Minerals Co; 2024-12-26 to current/open; source msha-controller-operator-history