# Relationship history for MSHA mine 0503528

Current hierarchy: **Clem  Borkowski → Thorin Resources → Revenue 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

- **controller_controls_mine:** Hecla Mining Company → Revenue Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Toro De Plata Inc → Revenue Mine; 1980-08-01 to 1984-08-28; source msha-controller-operator-history
- **controller_controls_mine:** Ranchers Exploration & Development Corp → Revenue Mine; 1980-08-01 to 1984-08-28; source msha-controller-operator-history
- **controller_controls_operator:** Ranchers Exploration & Development Corp → Toro De Plata Inc; 1980-08-01 to 1984-08-28; source msha-controller-operator-history
- **operator_operates_mine:** Hecla Mining Company → Revenue Mine; 1984-08-29 to 2011-10-18; source msha-controller-operator-history
- **controller_controls_operator:** Hecla Mining Company → Hecla Mining Company; 1984-08-29 to 2011-10-18; source msha-controller-operator-history
- **operator_operates_mine:** Star Mine Operations, LLC → Revenue Mine; 2011-10-19 to 2014-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Rory  Williams et al → Revenue Mine; 2011-10-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rory  Williams et al → Star Mine Operations, LLC; 2011-10-19 to 2014-09-30; source msha-controller-operator-history
- **controller_controls_operator:** James  Williams et al → Star Mine Operations, LLC; 2011-10-19 to 2014-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Ouray Silver Mines Inc. → Revenue Mine; 2014-10-01 to 2023-10-19; source msha-controller-operator-history
- **controller_controls_mine:** Fortune Minerals Limited → Revenue Mine; 2014-10-01 to 2015-07-21; source msha-controller-operator-history
- **controller_controls_operator:** Fortune Minerals Limited → Ouray Silver Mines Inc.; 2014-10-01 to 2015-07-21; source msha-controller-operator-history
- **controller_controls_mine:** Lascaux Resource Capital Fund I LP → Revenue Mine; 2015-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lascaux Resource Capital Fund I LP → Ouray Silver Mines Inc.; 2015-07-22 to 2023-10-19; source msha-controller-operator-history
- **operator_operates_mine:** Thorin Resources → Revenue Mine; 2023-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sturges D  Karban → Revenue Mine; 2023-10-20 to 2024-04-09; source msha-controller-operator-history
- **controller_controls_operator:** Sturges D  Karban → Thorin Resources; 2023-10-20 to 2024-04-09; source msha-controller-operator-history
- **controller_controls_mine:** Clem  Borkowski → Revenue Mine; 2024-04-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clem  Borkowski → Thorin Resources; 2024-04-10 to current/open; source msha-controller-operator-history