# Relationship history for MSHA mine 2500738

Current hierarchy: **Kurt  Croell → Croell, Inc. → Sutherland Pit**

- 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:** Roger  Croell → Sutherland Pit; 1950-01-01 to 2013-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Bill  Lemons et al → Sutherland Pit; 1990-08-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Western Materials Inc → Sutherland Pit; 2001-05-01 to 2019-04-17; source msha-controller-operator-history
- **controller_controls_operator:** Bill  Lemons et al → Western Materials Inc; 2001-05-01 to 2019-04-17; source msha-controller-operator-history
- **controller_controls_mine:** Kurt  Croell → Sutherland Pit; 2014-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Croell, Inc. → Sutherland Pit; 2019-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kurt  Croell → Croell, Inc.; 2019-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger  Croell → Croell, Inc.; 2019-04-18 to 2013-12-31; source msha-controller-operator-history