# Relationship history for MSHA mine 0404298

Current hierarchy: **Centennial Savings & Loan Association → Piombo Corp → Guerneville Aggregates**

- 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:** Felix H  Siri → Guerneville Aggregates; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Piombo Corp → Guerneville Aggregates; 1979-01-01 to 1984-06-14; source msha-controller-operator-history
- **controller_controls_operator:** Felix H  Siri → Piombo Corp; 1979-01-01 to 1984-06-14; source msha-controller-operator-history
- **operator_operates_mine:** Piombo Corp → Guerneville Aggregates; 1984-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Centennial Savings & Loan Association → Guerneville Aggregates; 1984-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Centennial Savings & Loan Association → Piombo Corp; 1984-06-15 to current/open; source msha-controller-operator-history