# Relationship history for MSHA mine 0202013

Current hierarchy: **Debra J Knight → Carlin Trend Mining Supplies and Service → Star Placer dba:  Big Bug 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Allied Mining Equipment Corp → Star Placer dba:  Big Bug Sand & Gravel; 1980-09-01 to 1996-06-17; source msha-controller-operator-history
- **controller_controls_mine:** Gene W  Bennett → Star Placer dba:  Big Bug Sand & Gravel; 1980-09-01 to 1996-06-17; source msha-controller-operator-history
- **controller_controls_operator:** Gene W  Bennett → Allied Mining Equipment Corp; 1980-09-01 to 1996-06-17; source msha-controller-operator-history
- **operator_operates_mine:** G & S Sand & Rock → Star Placer dba:  Big Bug Sand & Gravel; 1996-06-18 to 1997-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Susan  Bennett → Star Placer dba:  Big Bug Sand & Gravel; 1996-06-18 to 1997-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Susan  Bennett → G & S Sand & Rock; 1996-06-18 to 1997-09-30; source msha-controller-operator-history
- **operator_operates_mine:** G & S Sand & Rock → Star Placer dba:  Big Bug Sand & Gravel; 1997-10-01 to 2006-10-11; source msha-controller-operator-history
- **controller_controls_mine:** Gene W  Bennett → Star Placer dba:  Big Bug Sand & Gravel; 1997-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gene W  Bennett → G & S Sand & Rock; 1997-10-01 to 2006-10-11; source msha-controller-operator-history
- **operator_operates_mine:** G & S Gravel Inc → Star Placer dba:  Big Bug Sand & Gravel; 2006-10-12 to 2019-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Joan  Miller et al → Star Placer dba:  Big Bug Sand & Gravel; 2006-10-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joan  Miller et al → G & S Gravel Inc; 2006-10-12 to 2019-02-14; source msha-controller-operator-history
- **controller_controls_operator:** James A  Miller  et al → G & S Gravel Inc; 2006-10-12 to 2019-02-14; source msha-controller-operator-history
- **operator_operates_mine:** Carlin Trend Mining Supplies and Service → Star Placer dba:  Big Bug Sand & Gravel; 2019-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Debra J  Knight et al → Star Placer dba:  Big Bug Sand & Gravel; 2019-02-15 to 2024-10-08; source msha-controller-operator-history
- **controller_controls_operator:** Debra J  Knight et al → Carlin Trend Mining Supplies and Service; 2019-02-15 to 2024-10-08; source msha-controller-operator-history
- **controller_controls_operator:** David Cooper  Knight et al → Carlin Trend Mining Supplies and Service; 2019-02-15 to 2024-10-08; source msha-controller-operator-history
- **controller_controls_mine:** Debra J Knight → Star Placer dba:  Big Bug Sand & Gravel; 2024-10-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Debra J Knight → Carlin Trend Mining Supplies and Service; 2024-10-09 to current/open; source msha-controller-operator-history