# Relationship history for MSHA mine 3301413

Current hierarchy: **Daniel H  Ballentine → Ballentine Sand and Gravel LLC → Ballentine Sand and Gravel LLC**

- 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:** Karl Brugman Sand & Gravel Inc → Ballentine Sand and Gravel LLC; 1950-01-01 to 2001-03-21; source msha-controller-operator-history
- **controller_controls_mine:** Donald  Brugmann → Ballentine Sand and Gravel LLC; 1950-01-01 to 2001-03-21; source msha-controller-operator-history
- **controller_controls_operator:** Donald  Brugmann → Karl Brugman Sand & Gravel Inc; 1950-01-01 to 2001-03-21; source msha-controller-operator-history
- **operator_operates_mine:** Ballentine Sand and Gravel LLC → Ballentine Sand and Gravel LLC; 2001-03-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Daniel H  Ballentine → Ballentine Sand and Gravel LLC; 2001-03-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel H  Ballentine → Ballentine Sand and Gravel LLC; 2001-03-22 to current/open; source msha-controller-operator-history