# Relationship history for MSHA mine 2200736

Current hierarchy: **Bill  Hover → Hover Gravel Co., Inc. → Hover Gravel Co., Inc.**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Hover Gravel Co., Inc. → Hover Gravel Co., Inc.; 2001-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joyce  Hover → Hover Gravel Co., Inc.; 2001-01-01 to 2016-10-06; source msha-controller-operator-history
- **controller_controls_operator:** Joyce  Hover → Hover Gravel Co., Inc.; 2001-01-01 to 2016-10-06; source msha-controller-operator-history
- **controller_controls_mine:** Bill  Hover → Hover Gravel Co., Inc.; 2016-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bill  Hover → Hover Gravel Co., Inc.; 2016-10-07 to current/open; source msha-controller-operator-history