# Relationship history for MSHA mine 1512481

Current hierarchy: **Charles  Turner → B & L Energy Resources Inc → B & L #5 Mine**

- 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

- **operator_operates_mine:** B & L Energy Resources Inc → B & L #5 Mine; 1980-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles  Turner → B & L #5 Mine; 1980-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Turner → B & L Energy Resources Inc; 1980-08-01 to current/open; source msha-controller-operator-history