# Relationship history for MSHA mine 2700528

Current hierarchy: **James D  Phelps → Phelps Construction Inc. → South danbury 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

- **controller_controls_mine:** James D  Phelps → South danbury pit; 2012-10-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Phelps Construction Inc. → South danbury pit; 2023-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James D  Phelps → Phelps Construction Inc.; 2023-11-01 to current/open; source msha-controller-operator-history