# Relationship history for MSHA mine 2402236

Current hierarchy: **David  Wilkins → Glacier Stone Supply LLC → Glacier Mobile 2**

- 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:** Montana Stone Supply Inc → Glacier Mobile 2; 2001-09-01 to 2005-09-30; source msha-controller-operator-history
- **controller_controls_mine:** James  Norvell → Glacier Mobile 2; 2001-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Norvell → Montana Stone Supply Inc; 2001-09-01 to 2005-09-30; source msha-controller-operator-history
- **controller_controls_mine:** David  Wilkins → Glacier Mobile 2; 2004-03-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Glacier Stone Supply LLC → Glacier Mobile 2; 2005-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Wilkins → Glacier Stone Supply LLC; 2005-10-01 to current/open; source msha-controller-operator-history