# Relationship history for MSHA mine 5001583

Current hierarchy: **Shane  Holmberg; Jack  Dunshie → Tintina Gold Co llc → Ruby 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:** Sphinx Natural Resources/Malvy Technology Inc → Ruby Mine; 1988-09-01 to 2018-09-18; source msha-controller-operator-history
- **controller_controls_mine:** Malvy Technology Inc → Ruby Mine; 1988-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Malvy Technology Inc → Sphinx Natural Resources/Malvy Technology Inc; 1988-09-01 to 2018-09-18; source msha-controller-operator-history
- **operator_operates_mine:** Sphinx Exploration Inc. → Ruby Mine; 2018-09-19 to 2021-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Tom L Johnson et al → Ruby Mine; 2018-09-19 to 2019-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Tom L Johnson et al → Sphinx Exploration Inc.; 2018-09-19 to 2019-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Mark S Prins et al → Sphinx Exploration Inc.; 2018-09-19 to 2019-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Cecilia  Borgott et al → Sphinx Exploration Inc.; 2018-09-19 to 2019-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Nataliya  Hearn et al → Ruby Mine; 2019-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nataliya  Hearn et al → Sphinx Exploration Inc.; 2019-06-01 to 2021-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Shane  Holmberg et al → Sphinx Exploration Inc.; 2019-06-01 to 2021-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Tintina Gold Co llc → Ruby Mine; 2022-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jack  Dunshie et al → Ruby Mine; 2022-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jack  Dunshie et al → Tintina Gold Co llc; 2022-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shane  Holmberg et al → Tintina Gold Co llc; 2022-01-01 to current/open; source msha-controller-operator-history