# Relationship history for MSHA mine 2601566

Current hierarchy: **Kinross Gold Corporation → Round Mountain Gold Corp → Manhattan Mine & Mill**

- 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:** Houston Oil & Minerals Corp → Manhattan Mine & Mill; 1950-01-01 to 1981-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Echo Bay Mines Ltd → Manhattan Mine & Mill; 1950-01-01 to 2003-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Houston International Minerals Corp → Manhattan Mine & Mill; 1979-01-01 to 1981-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Houston Oil & Minerals Corp → Houston International Minerals Corp; 1979-01-01 to 1981-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Tenneco Inc → Manhattan Mine & Mill; 1979-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tenneco Minerals Company → Manhattan Mine & Mill; 1981-05-01 to 1986-11-18; source msha-controller-operator-history
- **controller_controls_operator:** Tenneco Inc → Tenneco Minerals Company; 1981-05-01 to 1986-11-18; source msha-controller-operator-history
- **operator_operates_mine:** Round Mountain Gold Corp → Manhattan Mine & Mill; 1986-11-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Echo Bay Mines Ltd → Round Mountain Gold Corp; 1986-11-19 to 2003-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Kinross Gold Corporation → Manhattan Mine & Mill; 2003-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kinross Gold Corporation → Round Mountain Gold Corp; 2003-03-01 to current/open; source msha-controller-operator-history