# Relationship history for MSHA mine 1518405

Current hierarchy: **James N  Harris; Steven R  Sizemore → Black Fire Mining Llc → Laurel Creek #01**

- 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:** Black Fire Mining Llc → Laurel Creek #01; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steven R  Sizemore et al → Laurel Creek #01; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven R  Sizemore et al → Black Fire Mining Llc; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James N  Harris et al → Black Fire Mining Llc; 2001-06-01 to current/open; source msha-controller-operator-history