# Relationship history for MSHA mine 2200481

Current hierarchy: **Cicardo James E → Quality Sand & Gravel Inc → Starkey 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:** Quality Sand & Gravel Inc → Starkey Pit; 1979-01-01 to 1985-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Fontaine Raymond G Et Al → Starkey Pit; 1979-01-01 to 1985-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Fontaine Raymond G Et Al → Quality Sand & Gravel Inc; 1979-01-01 to 1985-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Quality Sand & Gravel Inc → Starkey Pit; 1985-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cicardo James E → Starkey Pit; 1985-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cicardo James E → Quality Sand & Gravel Inc; 1985-02-01 to current/open; source msha-controller-operator-history