# Relationship history for MSHA mine 3401707

Current hierarchy: **Craig K  Jackson → Georges Colliers Inc → Pollyanna #6**

- 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:** Kenneth  Richardson et al → Pollyanna #6; 1988-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Heatherly Mining Inc → Pollyanna #6; 1990-02-01 to 1996-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth  Richardson et al → Heatherly Mining Inc; 1990-02-01 to 1996-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Georges Colliers Inc → Pollyanna #6; 1996-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Craig K  Jackson → Pollyanna #6; 1996-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Craig K  Jackson → Georges Colliers Inc; 1996-08-01 to current/open; source msha-controller-operator-history