# Relationship history for MSHA mine 4101248

Current hierarchy: **Doug  Walterscheid → J Lee Milligan Inc → KRITSER PIT & 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** J Lee Milligan Inc → KRITSER PIT & PLANT; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ruth S  Wall et al → KRITSER PIT & PLANT; 1950-01-01 to 2005-12-22; source msha-controller-operator-history
- **controller_controls_operator:** Ruth S  Wall et al → J Lee Milligan Inc; 1950-01-01 to 2005-12-22; source msha-controller-operator-history
- **controller_controls_mine:** Doug  Walterscheid et al → KRITSER PIT & PLANT; 2005-12-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Doug  Walterscheid et al → J Lee Milligan Inc; 2005-12-23 to current/open; source msha-controller-operator-history