# Relationship history for MSHA mine 0301959

Current hierarchy: **Keith  Waddell; Paul  Hudson → K T Rock LLC → Pleasant Plains Quarry**

- 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:** Paul  Hudson et al → Pleasant Plains Quarry; 2007-07-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** K T Rock LLC → Pleasant Plains Quarry; 2007-09-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Hudson et al → K T Rock LLC; 2007-09-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith  Waddell et al → K T Rock LLC; 2007-09-24 to current/open; source msha-controller-operator-history