# Relationship history for MSHA mine 3606343

Current hierarchy: **Glenn Harry & Jack L-Jacob Manners → Three J'S Mining → Koppers Strip**

- 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:** Glenn Harry & Jack L-Jacob Manners → Koppers Strip; 1976-06-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Three J'S Mining → Koppers Strip; 1977-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Glenn Harry & Jack L-Jacob Manners → Three J'S Mining; 1977-02-01 to current/open; source msha-controller-operator-history