# Relationship history for MSHA mine 0102168

Current hierarchy: **Joe E  Powell → Sagna Inc → Ballplay**

- 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:** Pollard Sand Company → Ballplay; 1979-11-01 to 1986-04-06; source msha-controller-operator-history
- **controller_controls_mine:** Pollard R E → Ballplay; 1979-11-01 to 1986-04-06; source msha-controller-operator-history
- **controller_controls_operator:** Pollard R E → Pollard Sand Company; 1979-11-01 to 1986-04-06; source msha-controller-operator-history
- **operator_operates_mine:** Ballplay Sand & Gravel Inc → Ballplay; 1986-04-07 to 1987-04-15; source msha-controller-operator-history
- **controller_controls_mine:** Henderson Thomas → Ballplay; 1986-04-07 to 1987-04-15; source msha-controller-operator-history
- **controller_controls_operator:** Henderson Thomas → Ballplay Sand & Gravel Inc; 1986-04-07 to 1987-04-15; source msha-controller-operator-history
- **operator_operates_mine:** Sagna Inc → Ballplay; 1987-04-16 to 1988-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Brown Raymond L Et Al → Ballplay; 1987-04-16 to 1988-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Brown Raymond L Et Al → Sagna Inc; 1987-04-16 to 1988-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Mec Sand & Gravel Inc → Ballplay; 1988-07-01 to 1989-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Stimpson J Thomas → Ballplay; 1988-07-01 to 1989-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Stimpson J Thomas → Mec Sand & Gravel Inc; 1988-07-01 to 1989-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Sagna Inc → Ballplay; 1989-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joe E  Powell → Ballplay; 1989-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joe E  Powell → Sagna Inc; 1989-05-01 to current/open; source msha-controller-operator-history