# Relationship history for MSHA mine 0503605

Current hierarchy: **Harold  Watts → Dolores Canyon Mines Inc → Emma 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:** Rado Reef Resources Inc → Emma Mine; 1980-10-01 to 1981-03-10; source msha-controller-operator-history
- **controller_controls_mine:** Christopher Ivan C → Emma Mine; 1980-10-01 to 1987-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Christopher Ivan C → Rado Reef Resources Inc; 1980-10-01 to 1981-03-10; source msha-controller-operator-history
- **operator_operates_mine:** Watts Mining & Development Corp → Emma Mine; 1981-03-11 to 1982-12-02; source msha-controller-operator-history
- **controller_controls_mine:** Harold  Watts → Emma Mine; 1981-03-11 to 1982-12-02; source msha-controller-operator-history
- **controller_controls_operator:** Harold  Watts → Watts Mining & Development Corp; 1981-03-11 to 1982-12-02; source msha-controller-operator-history
- **operator_operates_mine:** Rado Reef Resources Inc → Emma Mine; 1982-12-03 to 1987-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Christopher Ivan C → Rado Reef Resources Inc; 1982-12-03 to 1987-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Dolores Canyon Mines Inc → Emma Mine; 1987-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Harold  Watts → Emma Mine; 1987-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harold  Watts → Dolores Canyon Mines Inc; 1987-10-01 to current/open; source msha-controller-operator-history