# Relationship history for MSHA mine 2601678

Current hierarchy: **Wunderlich Robert & Lorne Camoppi → Spring Valley Mining → South Comstock**

- 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:** Hans N Lund → South Comstock; 1980-10-01 to 1981-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Lund Hans N → South Comstock; 1980-10-01 to 1993-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Lund Hans N → Hans N Lund; 1980-10-01 to 1981-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Wood Sidney → South Comstock; 1981-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mastermine Gold Corp → South Comstock; 1981-07-01 to 1983-11-01; source msha-controller-operator-history
- **controller_controls_operator:** Wood Sidney → Mastermine Gold Corp; 1981-07-01 to 1983-11-01; source msha-controller-operator-history
- **controller_controls_mine:** Teck Corp → South Comstock; 1983-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Teck Resources (Us) 1983 Inc → South Comstock; 1983-11-02 to 1985-06-17; source msha-controller-operator-history
- **controller_controls_operator:** Teck Corp → Teck Resources (Us) 1983 Inc; 1983-11-02 to 1985-06-17; source msha-controller-operator-history
- **operator_operates_mine:** Lund Mining → South Comstock; 1985-06-18 to 1987-06-23; source msha-controller-operator-history
- **controller_controls_mine:** Lund Hans N → South Comstock; 1985-06-18 to 1987-06-23; source msha-controller-operator-history
- **controller_controls_operator:** Lund Hans N → Lund Mining; 1985-06-18 to 1987-06-23; source msha-controller-operator-history
- **operator_operates_mine:** Eglinton Mining (Nevada) Plc → South Comstock; 1987-06-24 to 1991-04-18; source msha-controller-operator-history
- **controller_controls_mine:** O'Connell Emmett → South Comstock; 1987-06-24 to 1991-04-18; source msha-controller-operator-history
- **controller_controls_operator:** O'Connell Emmett → Eglinton Mining (Nevada) Plc; 1987-06-24 to 1991-04-18; source msha-controller-operator-history
- **operator_operates_mine:** Hans N Lund → South Comstock; 1991-04-19 to 1993-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Lund Hans N → Hans N Lund; 1991-04-19 to 1993-04-14; source msha-controller-operator-history
- **operator_operates_mine:** Spring Valley Mining → South Comstock; 1993-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wunderlich Robert & Lorne Camoppi → South Comstock; 1993-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wunderlich Robert & Lorne Camoppi → Spring Valley Mining; 1993-04-15 to current/open; source msha-controller-operator-history