# Relationship history for MSHA mine 0503023

Current hierarchy: **Harrison Western Corp & Peltron Resources Inc → Harrison-Peltron → Newlin Creek**

- 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:** Newlin Creek Coal Corp → Newlin Creek; 1976-10-01 to 1979-07-27; source msha-controller-operator-history
- **controller_controls_mine:** Berta Joseph E → Newlin Creek; 1976-10-01 to 1979-07-27; source msha-controller-operator-history
- **controller_controls_operator:** Berta Joseph E → Newlin Creek Coal Corp; 1976-10-01 to 1979-07-27; source msha-controller-operator-history
- **operator_operates_mine:** Harrison-Peltron → Newlin Creek; 1979-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Harrison Western Corp & Peltron Resources Inc → Newlin Creek; 1979-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harrison Western Corp & Peltron Resources Inc → Harrison-Peltron; 1979-07-28 to current/open; source msha-controller-operator-history