# Relationship history for MSHA mine 1001720

Current hierarchy: **CCI  (Clyde Companies Inc) → Sunroc Corporation → Star Pit**

- 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

- **controller_controls_mine:** CCI  (Clyde Companies Inc) → Star Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Marcum Sand & Gravel → Star Pit; 1986-03-01 to 1987-02-25; source msha-controller-operator-history
- **controller_controls_mine:** Frank E  Marcum → Star Pit; 1986-03-01 to 1987-02-25; source msha-controller-operator-history
- **controller_controls_operator:** Frank E  Marcum → Marcum Sand & Gravel; 1986-03-01 to 1987-02-25; source msha-controller-operator-history
- **operator_operates_mine:** Marcum Asphalt & Gravel → Star Pit; 1987-02-26 to 1992-09-20; source msha-controller-operator-history
- **controller_controls_mine:** Fred C  Rathbone → Star Pit; 1987-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fred C  Rathbone → Marcum Asphalt & Gravel; 1987-02-26 to 1992-09-20; source msha-controller-operator-history
- **operator_operates_mine:** Low's Ready Mix Inc → Star Pit; 1992-09-21 to 2016-10-02; source msha-controller-operator-history
- **controller_controls_mine:** Clint B  Low et al → Star Pit; 1992-09-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clint B  Low et al → Low's Ready Mix Inc; 1992-09-21 to 2016-10-02; source msha-controller-operator-history
- **controller_controls_operator:** Cal D  Low et al → Low's Ready Mix Inc; 1992-09-21 to 2016-10-02; source msha-controller-operator-history
- **operator_operates_mine:** Sunroc Corporation → Star Pit; 2016-10-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CCI  (Clyde Companies Inc) → Sunroc Corporation; 2016-10-03 to current/open; source msha-controller-operator-history