# Relationship history for MSHA mine 2602427

Current hierarchy: **James  Pitts → P Squared Enterprise, Inc. → SPRING CREEK SAND & GRAVEL**

- 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

- **operator_operates_mine:** Spring Creek Sand & Gravel → SPRING CREEK SAND & GRAVEL; 2000-07-01 to 2001-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Clifford N  Porter → SPRING CREEK SAND & GRAVEL; 2000-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clifford N  Porter → Spring Creek Sand & Gravel; 2000-07-01 to 2001-06-30; source msha-controller-operator-history
- **operator_operates_mine:** P Squared Enterprise, Inc. → SPRING CREEK SAND & GRAVEL; 2001-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James  Pitts et al → SPRING CREEK SAND & GRAVEL; 2001-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Pitts et al → P Squared Enterprise, Inc.; 2001-07-01 to current/open; source msha-controller-operator-history