# Relationship history for MSHA mine 3800590

Current hierarchy: **Quikrete Holdings Inc. → American Materials Company LLC → TINDAL MINE**

- 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:** H W  Hoefer  et al → TINDAL MINE; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J C Tindal Sand Company → TINDAL MINE; 1983-05-01 to 1994-02-20; source msha-controller-operator-history
- **controller_controls_mine:** J C  Tindal → TINDAL MINE; 1983-05-01 to 1994-02-20; source msha-controller-operator-history
- **controller_controls_operator:** J C  Tindal → J C Tindal Sand Company; 1983-05-01 to 1994-02-20; source msha-controller-operator-history
- **operator_operates_mine:** Columbia Silica Sand Inc → TINDAL MINE; 1994-02-21 to 2017-09-24; source msha-controller-operator-history
- **controller_controls_operator:** H W  Hoefer  et al → Columbia Silica Sand Inc; 1994-02-21 to 2017-09-24; source msha-controller-operator-history
- **controller_controls_operator:** T M  Hoefer  et al → Columbia Silica Sand Inc; 1994-02-21 to 2017-09-24; source msha-controller-operator-history
- **controller_controls_mine:** Gary (Tim)  Bizzell  et al → TINDAL MINE; 1999-11-02 to 2016-02-04; source msha-controller-operator-history
- **controller_controls_mine:** Summit Materials LLC → TINDAL MINE; 2016-02-05 to 2025-08-03; source msha-controller-operator-history
- **operator_operates_mine:** American Materials Company LLC → TINDAL MINE; 2017-09-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Summit Materials LLC → American Materials Company LLC; 2017-09-25 to 2025-08-03; source msha-controller-operator-history
- **controller_controls_operator:** Gary (Tim)  Bizzell  et al → American Materials Company LLC; 2017-09-25 to 2016-02-04; source msha-controller-operator-history
- **controller_controls_mine:** Quikrete Holdings Inc. → TINDAL MINE; 2025-08-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Quikrete Holdings Inc. → American Materials Company LLC; 2025-08-04 to current/open; source msha-controller-operator-history