# Relationship history for MSHA mine 3610029

Current hierarchy: **Luis L  Pulla → Pulla Stone → Pulla Stone**

- 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  Conrad → Pulla Stone; 2001-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Conrad Stone → Pulla Stone; 2012-10-17 to 2021-04-27; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Conrad → Conrad Stone; 2012-10-17 to 2021-04-27; source msha-controller-operator-history
- **operator_operates_mine:** Pulla Stone → Pulla Stone; 2021-04-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Luis L  Pulla → Pulla Stone; 2021-04-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Luis L  Pulla → Pulla Stone; 2021-04-28 to current/open; source msha-controller-operator-history