# Relationship history for MSHA mine 1510198

Current hierarchy: **Karst Edward W → Brenda Faye Coal Sales → Brenda Faye Coal Tipple**

- 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:** Brenda Faye Coal Sales → Brenda Faye Coal Tipple; 1977-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Karst Edward W → Brenda Faye Coal Tipple; 1977-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Karst Edward W → Brenda Faye Coal Sales; 1977-01-01 to current/open; source msha-controller-operator-history