# Relationship history for MSHA mine 4105009

Current hierarchy: **Harold Joe  Adams; Dinah R  Voelkel → O&G Rocks → Rockpit**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** O&G Rocks → Rockpit; 2013-04-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joe  Adams et al → Rockpit; 2013-04-08 to 2020-07-05; source msha-controller-operator-history
- **controller_controls_operator:** Joe  Adams et al → O&G Rocks; 2013-04-08 to 2020-07-05; source msha-controller-operator-history
- **controller_controls_operator:** Margaret  Thomas et al → O&G Rocks; 2013-04-08 to 2020-07-05; source msha-controller-operator-history
- **controller_controls_mine:** Harold Joe  Adams Et Al → Rockpit; 2020-07-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harold Joe  Adams Et Al → O&G Rocks; 2020-07-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dinah R  Voelkel Et Al → O&G Rocks; 2020-07-06 to current/open; source msha-controller-operator-history