# Relationship history for MSHA mine 1519587

Current hierarchy: **Robert D  Jessee → Stone Ridge Resources Inc. → Job -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

- **controller_controls_mine:** Robert D  Jessee → Job -1; 2008-07-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Stone Ridge Resources Inc. → Job -1; 2011-05-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert D  Jessee → Stone Ridge Resources Inc.; 2011-05-09 to current/open; source msha-controller-operator-history