# Relationship history for MSHA mine 0102587

Current hierarchy: **Scott  Callen → Callen Enterprises Inc → Scott Callen Sand & Gravel**

- 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:** William A  Hughes → Scott Callen Sand & Gravel; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Capital City Asphalt Company Inc → Scott Callen Sand & Gravel; 1984-05-01 to 1990-10-02; source msha-controller-operator-history
- **controller_controls_operator:** William A  Hughes → Capital City Asphalt Company Inc; 1984-05-01 to 1990-10-02; source msha-controller-operator-history
- **operator_operates_mine:** Lowndes Sand & Gravel Inc → Scott Callen Sand & Gravel; 1990-10-03 to 1993-06-30; source msha-controller-operator-history
- **controller_controls_mine:** James  Hammonds → Scott Callen Sand & Gravel; 1990-10-03 to 1993-06-30; source msha-controller-operator-history
- **controller_controls_operator:** James  Hammonds → Lowndes Sand & Gravel Inc; 1990-10-03 to 1993-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Lowndes Sand & Gravel → Scott Callen Sand & Gravel; 1993-07-01 to 1995-06-13; source msha-controller-operator-history
- **controller_controls_mine:** Randal  Mauney → Scott Callen Sand & Gravel; 1993-07-01 to 1995-06-13; source msha-controller-operator-history
- **controller_controls_operator:** Randal  Mauney → Lowndes Sand & Gravel; 1993-07-01 to 1995-06-13; source msha-controller-operator-history
- **operator_operates_mine:** Callen Enterprises Inc → Scott Callen Sand & Gravel; 1995-06-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Scott  Callen → Scott Callen Sand & Gravel; 1995-06-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott  Callen → Callen Enterprises Inc; 1995-06-14 to current/open; source msha-controller-operator-history