# Relationship history for MSHA mine 3102338

Current hierarchy: **Dawn E  Anderson; Peter S  Anderson → Anderson & Co Inc → Anderson Sand 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

- **operator_operates_mine:** Anderson & Co Inc → Anderson Sand PIt; 2020-01-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Peter S  Anderson Et Al → Anderson Sand PIt; 2020-01-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peter S  Anderson Et Al → Anderson & Co Inc; 2020-01-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dawn E  Anderson Et Al → Anderson & Co Inc; 2020-01-06 to current/open; source msha-controller-operator-history