# Relationship history for MSHA mine 0404699

Current hierarchy: **Hycroft Mining Corporation → Pecos Resources Inc → Hayden Hill Operation**

- 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:** Fischer-Watt Mining Company Inc → Hayden Hill Operation; 1983-10-01 to 1986-02-11; source msha-controller-operator-history
- **controller_controls_mine:** Durning P → Hayden Hill Operation; 1983-10-01 to 1987-07-23; source msha-controller-operator-history
- **controller_controls_operator:** Durning P → Fischer-Watt Mining Company Inc; 1983-10-01 to 1986-02-11; source msha-controller-operator-history
- **operator_operates_mine:** Pecos Resources Inc → Hayden Hill Operation; 1986-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hycroft Mining Corporation → Hayden Hill Operation; 1986-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hycroft Mining Corporation → Pecos Resources Inc; 1986-02-12 to current/open; source msha-controller-operator-history