# Relationship history for MSHA mine 1511489

Current hierarchy: **Louisiana Land & Exploration Company → Sun Fire Coal Company → Sunfire No 2**

- 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:** Louisiana Land & Exploration Company → Sunfire No 2; 1977-08-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sun Fire Coal Company → Sunfire No 2; 1978-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Louisiana Land & Exploration Company → Sun Fire Coal Company; 1978-08-01 to current/open; source msha-controller-operator-history