# Relationship history for MSHA mine 0202949

Current hierarchy: **William S  Hofhine → JC Rock → Portable Plant**

- 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. Rock, LLC → Portable Plant; 2001-07-19 to 2008-01-13; source msha-controller-operator-history
- **controller_controls_mine:** James L  Rodman → Portable Plant; 2001-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James L  Rodman → J.C. Rock, LLC; 2001-07-19 to 2008-01-13; source msha-controller-operator-history
- **operator_operates_mine:** JC Rock → Portable Plant; 2008-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William S  Hofhine → Portable Plant; 2008-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William S  Hofhine → JC Rock; 2008-01-14 to current/open; source msha-controller-operator-history