# Relationship history for MSHA mine 4104200

Current hierarchy: **Greg  Angel; Gary  Angel → Megasand Enterprises Inc → MEGASAND #2**

- 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:** Danny C  Moore  et al → MEGASAND #2; 1997-09-01 to 2020-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Megasand Enterprises Inc → MEGASAND #2; 2000-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Danny C  Moore  et al → Megasand Enterprises Inc; 2000-08-01 to 2020-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Angel et al → Megasand Enterprises Inc; 2000-08-01 to 2020-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Greg  Angel et al → MEGASAND #2; 2020-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Angel et al → Megasand Enterprises Inc; 2020-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Angel et al → Megasand Enterprises Inc; 2020-04-01 to current/open; source msha-controller-operator-history