# Relationship history for MSHA mine 4103763

Current hierarchy: **Aycock Eddie → Southfield Materials → Sleepy Hollow**

- 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:** Aycock Eddie Et Al → Sleepy Hollow; 1988-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Southfield Materials → Sleepy Hollow; 1993-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aycock Eddie Et Al → Southfield Materials; 1993-04-01 to current/open; source msha-controller-operator-history