# Relationship history for MSHA mine 4606860

Current hierarchy: **Outland Charles → Energy Recovery Inc → Carswell Reclamation Project (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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Ruth  Prater  et al → Carswell Reclamation Project (1); 1984-06-01 to 1994-02-14; source msha-controller-operator-history
- **operator_operates_mine:** E A Carswell Inc → Carswell Reclamation Project (1); 1984-11-01 to 1986-06-05; source msha-controller-operator-history
- **controller_controls_mine:** Adams Walter R → Carswell Reclamation Project (1); 1984-11-01 to 1986-06-05; source msha-controller-operator-history
- **controller_controls_operator:** Adams Walter R → E A Carswell Inc; 1984-11-01 to 1986-06-05; source msha-controller-operator-history
- **operator_operates_mine:** Black Ace Coal Company → Carswell Reclamation Project (1); 1986-06-06 to 1987-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Mullens Norman → Carswell Reclamation Project (1); 1986-06-06 to 1987-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Mullens Norman → Black Ace Coal Company; 1986-06-06 to 1987-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Resources Development Corp → Carswell Reclamation Project (1); 1987-06-01 to 1994-02-14; source msha-controller-operator-history
- **controller_controls_operator:** Ruth  Prater  et al → Resources Development Corp; 1987-06-01 to 1994-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Outland Charles → Carswell Reclamation Project (1); 1993-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Energy Recovery Inc → Carswell Reclamation Project (1); 1994-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Outland Charles → Energy Recovery Inc; 1994-02-15 to current/open; source msha-controller-operator-history