# Relationship history for MSHA mine 2302575

Current hierarchy: **Travis  Strain; Clyde  Lorance → Strain Excavating → Strain 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:** Strain Excavating → Strain Excavating; 2023-04-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Travis  Strain et al → Strain Excavating; 2023-04-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Travis  Strain et al → Strain Excavating; 2023-04-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clyde  Lorance et al → Strain Excavating; 2023-04-06 to current/open; source msha-controller-operator-history