# Relationship history for MSHA mine 3800714

Current hierarchy: **Jason C  Deck → McIntyre Sand Company Inc → Neal Shoals**

- 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:** Kyle H  McIntyre → Neal Shoals; 1981-05-01 to 2005-09-25; source msha-controller-operator-history
- **operator_operates_mine:** McIntyre Sand Company Inc → Neal Shoals; 2005-09-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stephen C  Langford → Neal Shoals; 2005-09-26 to 2026-07-21; source msha-controller-operator-history
- **controller_controls_operator:** Stephen C  Langford → McIntyre Sand Company Inc; 2005-09-26 to 2026-07-21; source msha-controller-operator-history
- **controller_controls_operator:** Kyle H  McIntyre → McIntyre Sand Company Inc; 2005-09-26 to 2005-09-25; source msha-controller-operator-history
- **controller_controls_mine:** Jason C  Deck → Neal Shoals; 2026-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason C  Deck → McIntyre Sand Company Inc; 2026-07-22 to current/open; source msha-controller-operator-history