# Relationship history for MSHA mine 0504413

Current hierarchy: **Roy  Hocker; Glenda  Hocker → Hocker Construction → CRUSH #1/#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

- **operator_operates_mine:** Hocker Construction → CRUSH #1/#2; 1989-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Glenda  Hocker et al → CRUSH #1/#2; 1989-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Glenda  Hocker et al → Hocker Construction; 1989-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roy  Hocker et al → Hocker Construction; 1989-11-01 to current/open; source msha-controller-operator-history