# Relationship history for MSHA mine 4700848

Current hierarchy: **Kurt  Croell → Croell, Inc. → SMITH 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 → SMITH PIT; 1950-01-01 to 2013-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Smith Gravel Pit Inc → SMITH PIT; 1950-01-01 to 1988-07-04; source msha-controller-operator-history
- **controller_controls_mine:** David P  Smith → SMITH PIT; 1950-01-01 to 1988-07-04; source msha-controller-operator-history
- **controller_controls_operator:** David P  Smith → Smith Gravel Pit Inc; 1950-01-01 to 1988-07-04; source msha-controller-operator-history
- **operator_operates_mine:** Quality Aggregates & Ready Mix Inc → SMITH PIT; 1988-07-05 to 1993-06-09; source msha-controller-operator-history
- **controller_controls_mine:** Brandon  McNeilus → SMITH PIT; 1988-07-05 to 1993-06-09; source msha-controller-operator-history
- **controller_controls_operator:** Brandon  McNeilus → Quality Aggregates & Ready Mix Inc; 1988-07-05 to 1993-06-09; source msha-controller-operator-history
- **operator_operates_mine:** Croell, Inc. → SMITH PIT; 1993-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger  Croell → Croell, Inc.; 1993-06-10 to 2013-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Kurt  Croell → SMITH PIT; 2014-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kurt  Croell → Croell, Inc.; 2014-01-01 to current/open; source msha-controller-operator-history