# Relationship history for MSHA mine 1601526

Current hierarchy: **Bobby  Johnson; Don  Cave → J & C Marine, LLC → Darlington Division**

- 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:** J & C Marine, LLC → Darlington Division; 2012-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Don  Cave et al → Darlington Division; 2012-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Don  Cave et al → J & C Marine, LLC; 2012-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bobby  Johnson et al → J & C Marine, LLC; 2012-06-19 to current/open; source msha-controller-operator-history