# Relationship history for MSHA mine 0203001

Current hierarchy: **Loren J  Sheldon → L. Sheldon & Co. Corp. → Whetstone 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:** Loren J  Sheldon → Whetstone Pit; 2002-10-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** L. Sheldon & Co. Corp. → Whetstone Pit; 2003-01-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Loren J  Sheldon → L. Sheldon & Co. Corp.; 2003-01-30 to current/open; source msha-controller-operator-history