# Relationship history for MSHA mine 0202827

Current hierarchy: **Donald R  Peterson → DPE Materials, Inc → SOUTH YUMA 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Donald W  Kelland → SOUTH YUMA PIT; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Don Kelland Materials Inc → SOUTH YUMA PIT; 1999-05-01 to 2004-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Donald W  Kelland → Don Kelland Materials Inc; 1999-05-01 to 2004-12-31; source msha-controller-operator-history
- **operator_operates_mine:** DPE Materials, Inc → SOUTH YUMA PIT; 2005-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donald R  Peterson et al → SOUTH YUMA PIT; 2005-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald R  Peterson et al → DPE Materials, Inc; 2005-01-01 to current/open; source msha-controller-operator-history