# Relationship history for MSHA mine 0404531

Current hierarchy: **Zirak Val → Goldbug Mines Inc → Goldbug 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:** Tuma Corp → Goldbug Mine; 1981-08-01 to 1985-01-21; source msha-controller-operator-history
- **controller_controls_mine:** Sigler Marvin B → Goldbug Mine; 1981-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sigler Marvin B → Tuma Corp; 1981-08-01 to 1985-01-21; source msha-controller-operator-history
- **operator_operates_mine:** California Exploration Corp → Goldbug Mine; 1985-01-22 to 1985-06-17; source msha-controller-operator-history
- **controller_controls_mine:** Loidolt Larry H → Goldbug Mine; 1985-01-22 to 1985-06-17; source msha-controller-operator-history
- **controller_controls_operator:** Loidolt Larry H → California Exploration Corp; 1985-01-22 to 1985-06-17; source msha-controller-operator-history
- **operator_operates_mine:** Goldbug Mines Inc → Goldbug Mine; 1985-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Zirak Val → Goldbug Mine; 1985-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Zirak Val → Goldbug Mines Inc; 1985-06-18 to current/open; source msha-controller-operator-history