# Relationship history for MSHA mine 1519932

Current hierarchy: **Christopher R  Harrington; Raleigh T  Harrington III; David M  O'Brien → XR Mining, LLC → Lower Elkhorn Mine #1**

- 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:** XR Mining, LLC → Lower Elkhorn Mine #1; 2022-12-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Christopher R  Harrington et al → Lower Elkhorn Mine #1; 2022-12-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christopher R  Harrington et al → XR Mining, LLC; 2022-12-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Raleigh T  Harrington III et al → XR Mining, LLC; 2022-12-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David M  O'Brien et al → XR Mining, LLC; 2022-12-19 to current/open; source msha-controller-operator-history