# Relationship history for MSHA mine 3002930

Current hierarchy: **Justin  Sokolowski → SEWARD SAND & GRAVEL INC. → RIDER 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

- **controller_controls_mine:** Town Of Meredith-Ny → RIDER PIT; 1980-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David R  Beisler → RIDER PIT; 1983-04-14 to 2022-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Town Of Meredith → RIDER PIT; 1990-01-01 to 2002-04-03; source msha-controller-operator-history
- **controller_controls_operator:** Town Of Meredith-Ny → Town Of Meredith; 1990-01-01 to 2002-04-03; source msha-controller-operator-history
- **operator_operates_mine:** SEWARD SAND & GRAVEL INC. → RIDER PIT; 2002-04-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David R  Beisler → SEWARD SAND & GRAVEL INC.; 2002-04-04 to 2022-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Justin  Sokolowski → RIDER PIT; 2022-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Justin  Sokolowski → SEWARD SAND & GRAVEL INC.; 2022-12-01 to current/open; source msha-controller-operator-history