# Relationship history for MSHA mine 1513065

Current hierarchy: **Reese Chester-Danny & Teddy D → Big Branch Fuel Inc → 77 Surface**

- 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:** Reese Chester-Danny & Teddy D → 77 Surface; 1978-07-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Big Branch Fuel Inc → 77 Surface; 1981-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reese Chester-Danny & Teddy D → Big Branch Fuel Inc; 1981-08-01 to current/open; source msha-controller-operator-history