# Relationship history for MSHA mine 0404707

Current hierarchy: **Derek  Norris; Scott  Worley → Sierra Aggregate Company, Inc. → RED TOP 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

- **operator_operates_mine:** Sierra Aggregate Company, Inc. → RED TOP MINE; 1984-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donald G  Jolly → RED TOP MINE; 1984-06-01 to 2024-05-12; source msha-controller-operator-history
- **controller_controls_operator:** Donald G  Jolly → Sierra Aggregate Company, Inc.; 1984-06-01 to 2024-05-12; source msha-controller-operator-history
- **controller_controls_mine:** Scott  Worley et al → RED TOP MINE; 2024-05-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott  Worley et al → Sierra Aggregate Company, Inc.; 2024-05-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Derek  Norris et al → Sierra Aggregate Company, Inc.; 2024-05-13 to current/open; source msha-controller-operator-history