# Relationship history for MSHA mine 2001297

Current hierarchy: **William  MacDonald → Mac Sand Sales → Mac Sand Sales**

- 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:** Great Lakes Minerals Company → Mac Sand Sales; 1950-01-01 to 1988-05-08; source msha-controller-operator-history
- **controller_controls_mine:** William H  Paddison → Mac Sand Sales; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William H  Paddison → Great Lakes Minerals Company; 1950-01-01 to 1988-05-08; source msha-controller-operator-history
- **operator_operates_mine:** Great Lakes Minerals Corp → Mac Sand Sales; 1988-05-09 to 1996-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Evans Industries Inc → Mac Sand Sales; 1988-05-09 to 1996-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Evans Industries Inc → Great Lakes Minerals Corp; 1988-05-09 to 1996-04-30; source msha-controller-operator-history
- **operator_operates_mine:** TUSCOLA MINERALS CO. → Mac Sand Sales; 1996-05-01 to 2006-08-24; source msha-controller-operator-history
- **controller_controls_mine:** James O  Reid → Mac Sand Sales; 1996-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James O  Reid → TUSCOLA MINERALS CO.; 1996-05-01 to 2006-08-24; source msha-controller-operator-history
- **operator_operates_mine:** MID MICHIGAN MINERALS LLC → Mac Sand Sales; 2006-08-25 to 2008-06-23; source msha-controller-operator-history
- **controller_controls_mine:** Richard H  Strauchman → Mac Sand Sales; 2006-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard H  Strauchman → MID MICHIGAN MINERALS LLC; 2006-08-25 to 2008-06-23; source msha-controller-operator-history
- **operator_operates_mine:** Tuscola Minerals Co. → Mac Sand Sales; 2008-06-24 to 2017-05-21; source msha-controller-operator-history
- **controller_controls_operator:** James O  Reid → Tuscola Minerals Co.; 2008-06-24 to 2017-05-21; source msha-controller-operator-history
- **operator_operates_mine:** Mac Sand Sales → Mac Sand Sales; 2017-05-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William  MacDonald → Mac Sand Sales; 2017-05-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  MacDonald → Mac Sand Sales; 2017-05-22 to current/open; source msha-controller-operator-history