# Relationship history for MSHA mine 0405214

Current hierarchy: **Peter  Shea Jr → J F Shea Construction, Inc. → Portable #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

- **controller_controls_mine:** John F  Shea → Portable #1; 1950-01-01 to 2024-10-21; source msha-controller-operator-history
- **controller_controls_mine:** Bruce O  McIntosh et al → Portable #1; 1980-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mc Intosh Construction → Portable #1; 1993-05-01 to 1997-01-28; source msha-controller-operator-history
- **controller_controls_operator:** Bruce O  McIntosh et al → Mc Intosh Construction; 1993-05-01 to 1997-01-28; source msha-controller-operator-history
- **operator_operates_mine:** Essayons Inc → Portable #1; 1997-01-29 to 2003-11-06; source msha-controller-operator-history
- **controller_controls_mine:** Terry E  Smith → Portable #1; 1997-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terry E  Smith → Essayons Inc; 1997-01-29 to 2003-11-06; source msha-controller-operator-history
- **operator_operates_mine:** J F Shea Construction, Inc. → Portable #1; 2003-11-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John F  Shea → J F Shea Construction, Inc.; 2003-11-07 to 2024-10-21; source msha-controller-operator-history
- **controller_controls_mine:** Peter  Shea Jr → Portable #1; 2024-10-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peter  Shea Jr → J F Shea Construction, Inc.; 2024-10-22 to current/open; source msha-controller-operator-history