# Relationship history for MSHA mine 1300280

Current hierarchy: **Daniel R Becker → Wm Becker & Sons Stone Co Inc → Lot 340 Quarry**

- 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:** Wm Becker & Sons Stone Co Inc → Lot 340 Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Darlene L  Becker → Lot 340 Quarry; 1950-01-01 to 2017-08-17; source msha-controller-operator-history
- **controller_controls_operator:** Darlene L  Becker → Wm Becker & Sons Stone Co Inc; 1950-01-01 to 2017-08-17; source msha-controller-operator-history
- **controller_controls_mine:** Daniel R Becker et al → Lot 340 Quarry; 2017-08-18 to 2023-07-10; source msha-controller-operator-history
- **controller_controls_operator:** Daniel R Becker et al → Wm Becker & Sons Stone Co Inc; 2017-08-18 to 2023-07-10; source msha-controller-operator-history
- **controller_controls_operator:** Douglas J Becker et al → Wm Becker & Sons Stone Co Inc; 2017-08-18 to 2023-07-10; source msha-controller-operator-history
- **controller_controls_mine:** Daniel R Becker → Lot 340 Quarry; 2023-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel R Becker → Wm Becker & Sons Stone Co Inc; 2023-07-11 to current/open; source msha-controller-operator-history