# Relationship history for MSHA mine 2602459

Current hierarchy: **Douglas Todd  Keck → Keck & Associates → JEAN SAND 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

- **operator_operates_mine:** Keck & Associates → JEAN SAND PIT; 2001-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Douglas Todd  Keck → JEAN SAND PIT; 2001-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas Todd  Keck → Keck & Associates; 2001-07-01 to current/open; source msha-controller-operator-history