# Relationship history for MSHA mine 3501280

Current hierarchy: **Wesley J  Kincheloe → Kincheloe & Sons Inc → FT2650 Jaw 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:** Main Construction Company → FT2650 Jaw Plant; 1950-01-01 to 1979-07-29; source msha-controller-operator-history
- **controller_controls_mine:** Main Construction Company → FT2650 Jaw Plant; 1950-01-01 to 1979-07-29; source msha-controller-operator-history
- **controller_controls_operator:** Main Construction Company → Main Construction Company; 1950-01-01 to 1979-07-29; source msha-controller-operator-history
- **controller_controls_mine:** Wesley J  Kincheloe → FT2650 Jaw Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kincheloe & Sons Inc → FT2650 Jaw Plant; 1979-07-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wesley J  Kincheloe → Kincheloe & Sons Inc; 1979-07-30 to current/open; source msha-controller-operator-history