# Relationship history for MSHA mine 1002209

Current hierarchy: **Sima  Muroff → Idaho State Gold Company → Gold Hill**

- 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:** Gold Hill Reclamation & Mining Company → Gold Hill; 2010-07-20 to 2014-05-26; source msha-controller-operator-history
- **controller_controls_mine:** Torry  McAlvain et al → Gold Hill; 2010-07-20 to 2010-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Torry  McAlvain et al → Gold Hill Reclamation & Mining Company; 2010-07-20 to 2010-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Ronald W  Guill → Gold Hill; 2011-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald W  Guill → Gold Hill Reclamation & Mining Company; 2011-01-01 to 2014-05-26; source msha-controller-operator-history
- **operator_operates_mine:** Idaho State Gold Company → Gold Hill; 2014-05-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sima  Muroff et al → Gold Hill; 2014-05-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sima  Muroff et al → Idaho State Gold Company; 2014-05-27 to current/open; source msha-controller-operator-history