# Relationship history for MSHA mine 3608466

Current hierarchy: **Scrubgrass Generating Company LP → Leechburg Properties, Inc. → Leechburg Site, Foster No 65**

- 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:** Leechburg Properties Inc → Leechburg Site, Foster No 65; 1994-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Scrubgrass Generating Company LP → Leechburg Site, Foster No 65; 1994-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scrubgrass Generating Company LP → Leechburg Properties Inc; 1994-04-01 to current/open; source msha-controller-operator-history