# Relationship history for MSHA mine 3901656

Current hierarchy: **Casey  Skyberg; Clyde  Lipp; Lyndon  Bolt → 63 Industries → 63 Mobile 1**

- 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:** 63 Industries → 63 Mobile 1; 2021-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lyndon  Bolt et al → 63 Mobile 1; 2021-05-10 to 2025-02-06; source msha-controller-operator-history
- **controller_controls_operator:** Lyndon  Bolt et al → 63 Industries; 2021-05-10 to 2025-02-06; source msha-controller-operator-history
- **controller_controls_operator:** Casey  Skyberg et al → 63 Industries; 2021-05-10 to 2025-02-06; source msha-controller-operator-history
- **controller_controls_mine:** Lyndon  Bolt et al → 63 Mobile 1; 2025-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lyndon  Bolt et al → 63 Industries; 2025-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Casey  Skyberg et al → 63 Industries; 2025-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clyde  Lipp et al → 63 Industries; 2025-02-07 to current/open; source msha-controller-operator-history