# Relationship history for MSHA mine 4202591

Current hierarchy: **Roger N  Chapman; Ryan R  Chapman → Chapman Materials → Crusher A**

- 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:** Roger N  Chapman et al → Crusher A; 2010-07-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R Chapman Construction Inc. → Crusher A; 2012-07-01 to 2014-01-28; source msha-controller-operator-history
- **controller_controls_operator:** Roger N  Chapman et al → R Chapman Construction Inc.; 2012-07-01 to 2014-01-28; source msha-controller-operator-history
- **controller_controls_operator:** Ryan R  Chapman et al → R Chapman Construction Inc.; 2012-07-01 to 2014-01-28; source msha-controller-operator-history
- **operator_operates_mine:** Chapman Materials → Crusher A; 2014-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ryan R  Chapman et al → Crusher A; 2014-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ryan R  Chapman et al → Chapman Materials; 2014-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger N  Chapman et al → Chapman Materials; 2014-01-29 to current/open; source msha-controller-operator-history