# Relationship history for MSHA mine 1518542

Current hierarchy: **Dennis  Johnson → Appalachian Mining & Reclamation LLC → South**

- 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:** Riverview Terminal Company → South; 2002-04-24 to 2013-02-25; source msha-controller-operator-history
- **controller_controls_mine:** Goldfields Mining Corp → South; 2002-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Goldfields Mining Corp → Riverview Terminal Company; 2002-04-24 to 2013-02-25; source msha-controller-operator-history
- **controller_controls_mine:** Dennis  Johnson → South; 2013-01-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Appalachian Mining & Reclamation LLC → South; 2013-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis  Johnson → Appalachian Mining & Reclamation LLC; 2013-02-26 to current/open; source msha-controller-operator-history