# Relationship history for MSHA mine 1518758

Current hierarchy: **James A  Sigmon → Marion Energy LLC → #2-C 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

- **controller_controls_mine:** James A  Sigmon → #2-C Mine; 1998-09-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Marion Energy LLC → #2-C Mine; 2004-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James A  Sigmon → Marion Energy LLC; 2004-05-11 to current/open; source msha-controller-operator-history