# Relationship history for MSHA mine 0500448

Current hierarchy: **Judy  Sprague → Arkins Park Stone → Lyons Red**

- 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:** Judy  Sprague → Lyons Red; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Neil Sprague → Lyons Red; 1950-01-01 to 2002-10-08; source msha-controller-operator-history
- **controller_controls_mine:** Neil  Sprague → Lyons Red; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Neil  Sprague → Neil Sprague; 1950-01-01 to 2002-10-08; source msha-controller-operator-history
- **operator_operates_mine:** Arkins Park Stone → Lyons Red; 2002-10-09 to 2004-02-29; source msha-controller-operator-history
- **controller_controls_operator:** Judy  Sprague → Arkins Park Stone; 2002-10-09 to 2004-02-29; source msha-controller-operator-history
- **operator_operates_mine:** Sprague Stone → Lyons Red; 2004-03-01 to 2005-05-25; source msha-controller-operator-history
- **controller_controls_mine:** Matthew J  Spraque → Lyons Red; 2004-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew J  Spraque → Sprague Stone; 2004-03-01 to 2005-05-25; source msha-controller-operator-history
- **operator_operates_mine:** Arkins Park Stone → Lyons Red; 2005-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Judy  Sprague → Arkins Park Stone; 2005-05-26 to current/open; source msha-controller-operator-history