# Relationship history for MSHA mine 0504991

Current hierarchy: **Patrick D  Maher → Venture Resources Inc → Hukill Gulch Millsite**

- 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:** Venture Resources Inc → Hukill Gulch Millsite; 2011-09-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ryan J  McHale et al → Hukill Gulch Millsite; 2011-09-26 to 2018-01-02; source msha-controller-operator-history
- **controller_controls_operator:** Ryan J  McHale et al → Venture Resources Inc; 2011-09-26 to 2018-01-02; source msha-controller-operator-history
- **controller_controls_operator:** Patrick D  Maher et al → Venture Resources Inc; 2011-09-26 to 2018-01-02; source msha-controller-operator-history
- **controller_controls_mine:** Patrick D  Maher → Hukill Gulch Millsite; 2018-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patrick D  Maher → Venture Resources Inc; 2018-01-03 to current/open; source msha-controller-operator-history