# Relationship history for MSHA mine 2602927

Current hierarchy: **A Scott  Dockter → CoreTer LLC → Keystone Mine**

- 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:** A Scott  Dockter → Keystone Mine; 2025-11-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CoreTer LLC → Keystone Mine; 2026-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** A Scott  Dockter → CoreTer LLC; 2026-07-15 to current/open; source msha-controller-operator-history