# Relationship history for MSHA mine 0103401

Current hierarchy: **C R  Campbell Sr → South Alabama Materials, Inc. → Cedar Creek 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:** C R  Campbell Sr et al → Cedar Creek Pit; 1990-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** American Aggregate Producers Inc → Cedar Creek Pit; 2008-09-10 to 2009-07-29; source msha-controller-operator-history
- **controller_controls_mine:** C R  Campbell Sr et al → Cedar Creek Pit; 2008-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** C R  Campbell Sr et al → American Aggregate Producers Inc; 2008-09-10 to 2009-07-29; source msha-controller-operator-history
- **operator_operates_mine:** South Alabama Materials, Inc. → Cedar Creek Pit; 2009-07-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** C R  Campbell Sr et al → South Alabama Materials, Inc.; 2009-07-30 to current/open; source msha-controller-operator-history