# Relationship history for MSHA mine 4502785

Current hierarchy: **Alan C  Hille → Connell Sand & Gravel Inc → Connell Sand & Gravel 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Boyd Gray Construction → Connell Sand & Gravel Pit; 1980-02-01 to 1980-10-14; source msha-controller-operator-history
- **controller_controls_mine:** Boyd  Gray → Connell Sand & Gravel Pit; 1980-02-01 to 1980-10-14; source msha-controller-operator-history
- **controller_controls_operator:** Boyd  Gray → Boyd Gray Construction; 1980-02-01 to 1980-10-14; source msha-controller-operator-history
- **operator_operates_mine:** Connell Sand & Gravel → Connell Sand & Gravel Pit; 1980-10-15 to 1993-06-15; source msha-controller-operator-history
- **controller_controls_mine:** Ray A  Carlisle → Connell Sand & Gravel Pit; 1980-10-15 to 1993-06-15; source msha-controller-operator-history
- **controller_controls_operator:** Ray A  Carlisle → Connell Sand & Gravel; 1980-10-15 to 1993-06-15; source msha-controller-operator-history
- **operator_operates_mine:** Connell Sand & Gravel Inc → Connell Sand & Gravel Pit; 1993-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alan C  Hille → Connell Sand & Gravel Pit; 1993-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alan C  Hille → Connell Sand & Gravel Inc; 1993-06-16 to current/open; source msha-controller-operator-history