# Relationship history for MSHA mine 0503823

Current hierarchy: **Richard  Connell → Loveland Excavating Company → Taft Hill 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:** Richard  Connell → Taft Hill Pit; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** G L Gravel Pit Company Inc → Taft Hill Pit; 1982-11-01 to 1986-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Glass John F Sr → Taft Hill Pit; 1982-11-01 to 1986-11-30; source msha-controller-operator-history
- **controller_controls_operator:** Glass John F Sr → G L Gravel Pit Company Inc; 1982-11-01 to 1986-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Loveland Excavating Company → Taft Hill Pit; 1986-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Connell → Loveland Excavating Company; 1986-12-01 to current/open; source msha-controller-operator-history