# Relationship history for MSHA mine 1519493

Current hierarchy: **Dennis  Johnson → Appalachian Mining & Reclamation LLC → No 1**

- 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:** Indeva Mng. Co. Inc. → No 1; 2010-04-29 to 2013-06-18; source msha-controller-operator-history
- **controller_controls_mine:** James B  Spencer → No 1; 2010-04-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James B  Spencer → Indeva Mng. Co. Inc.; 2010-04-29 to 2013-06-18; source msha-controller-operator-history
- **controller_controls_mine:** Dennis  Johnson → No 1; 2013-01-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Appalachian Mining & Reclamation LLC → No 1; 2013-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis  Johnson → Appalachian Mining & Reclamation LLC; 2013-06-19 to current/open; source msha-controller-operator-history