# Relationship history for MSHA mine 1518783

Current hierarchy: **Mark  Horton; David  Ison → American Reclamation Co LLC → K-2 Surface 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

- **operator_operates_mine:** American Reclamation Co LLC → K-2 Surface Mine; 2004-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David  Ison  et al → K-2 Surface Mine; 2004-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Ison  et al → American Reclamation Co LLC; 2004-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Horton  et al → American Reclamation Co LLC; 2004-08-02 to current/open; source msha-controller-operator-history