# Relationship history for MSHA mine 3610010

Current hierarchy: **Gregg J  Sterling; G Robert  Sterling → Canmore Coal Co, LLC → No. 1 Strip**

- 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:** Canmore Coal Co, LLC → No. 1 Strip; 2012-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gregg J  Sterling et al → No. 1 Strip; 2012-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gregg J  Sterling et al → Canmore Coal Co, LLC; 2012-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** G Robert  Sterling et al → Canmore Coal Co, LLC; 2012-05-24 to current/open; source msha-controller-operator-history