# Relationship history for MSHA mine 1001855

Current hierarchy: **M Joan  Sluder → Glendale Construction Inc → GLENDALE P.P. #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:** M Joan  Sluder  et al → GLENDALE P.P. #2; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Glendale Construction Inc → GLENDALE P.P. #2; 1989-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** M Joan  Sluder  et al → Glendale Construction Inc; 1989-11-01 to current/open; source msha-controller-operator-history