# Relationship history for MSHA mine 3503010

Current hierarchy: **Scott  Simplot → Simplot Resources Inc → Cracker Creek 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Brooks Fred H → Cracker Creek Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Brooks Minerals Inc → Cracker Creek Mine; 1980-07-01 to 1990-05-30; source msha-controller-operator-history
- **controller_controls_operator:** Brooks Fred H → Brooks Minerals Inc; 1980-07-01 to 1990-05-30; source msha-controller-operator-history
- **operator_operates_mine:** Simplot Resources Inc → Cracker Creek Mine; 1990-05-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Scott  Simplot → Cracker Creek Mine; 1990-05-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott  Simplot → Simplot Resources Inc; 1990-05-31 to current/open; source msha-controller-operator-history