# Relationship history for MSHA mine 0301953

Current hierarchy: **Keith  Waddell; Paul  Hudson → K.T. Rock, LLC → Holly Springs 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** K.T. Rock, LLC → Holly Springs Quarry; 2007-07-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Paul  Hudson et al → Holly Springs Quarry; 2007-07-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Hudson et al → K.T. Rock, LLC; 2007-07-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith  Waddell et al → K.T. Rock, LLC; 2007-07-18 to current/open; source msha-controller-operator-history