# Relationship history for MSHA mine 5001386

Current hierarchy: **Gregory D  Walters; Robert D  Kingsley → Glacier Mining LLC → Glacier Mining LLC**

- 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:** Lester Mines → Glacier Mining LLC; 1980-07-01 to 2012-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Lester Michael J → Glacier Mining LLC; 1980-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lester Michael J → Lester Mines; 1980-07-01 to 2012-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Glacier Mining LLC → Glacier Mining LLC; 2012-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert D  Kingsley et al → Glacier Mining LLC; 2012-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert D  Kingsley et al → Glacier Mining LLC; 2012-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gregory D  Walters et al → Glacier Mining LLC; 2012-06-01 to current/open; source msha-controller-operator-history