# Relationship history for MSHA mine 5001781

Current hierarchy: **Sam G McCullough → McCullough Excavating & Snowplowing Inc. → McCullough Excavating**

- 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

- **operator_operates_mine:** Mincher Enterprises → McCullough Excavating; 2003-07-01 to 2016-04-21; source msha-controller-operator-history
- **controller_controls_mine:** Dorothy A  Mincher → McCullough Excavating; 2003-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dorothy A  Mincher → Mincher Enterprises; 2003-07-01 to 2016-04-21; source msha-controller-operator-history
- **operator_operates_mine:** McCullough Excavating & Snowplowing Inc. → McCullough Excavating; 2016-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sam G McCullough → McCullough Excavating; 2016-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sam G McCullough → McCullough Excavating & Snowplowing Inc.; 2016-04-22 to current/open; source msha-controller-operator-history