# Relationship history for MSHA mine 2602577

Current hierarchy: **Comstock Mining Inc → The Plum Mining Company LLC → New York Shaft**

- 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

- **controller_controls_mine:** Brockbank W Hughes → New York Shaft; 2000-08-01 to 2003-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Comstock Mining Inc → New York Shaft; 2003-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** The Plum Mining Company LLC → New York Shaft; 2005-11-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Comstock Mining Inc → The Plum Mining Company LLC; 2005-11-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brockbank W Hughes → The Plum Mining Company LLC; 2005-11-22 to 2003-10-31; source msha-controller-operator-history