# Relationship history for MSHA mine 4103441

Current hierarchy: **Kelly Mike → Ashe Lake Sand & Gravel Inc → Pit #1**

- 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

- **operator_operates_mine:** Peace Materials Company → Pit #1; 1986-11-01 to 1987-01-19; source msha-controller-operator-history
- **controller_controls_mine:** Peace John → Pit #1; 1986-11-01 to 1987-01-19; source msha-controller-operator-history
- **controller_controls_operator:** Peace John → Peace Materials Company; 1986-11-01 to 1987-01-19; source msha-controller-operator-history
- **operator_operates_mine:** Ashe Lake Sand & Gravel Inc → Pit #1; 1987-01-20 to 1987-05-11; source msha-controller-operator-history
- **controller_controls_mine:** Young Tom → Pit #1; 1987-01-20 to 1987-05-11; source msha-controller-operator-history
- **controller_controls_operator:** Young Tom → Ashe Lake Sand & Gravel Inc; 1987-01-20 to 1987-05-11; source msha-controller-operator-history
- **controller_controls_mine:** Kelly Mike → Pit #1; 1987-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ashe Lake Sand & Gravel Inc → Pit #1; 1987-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kelly Mike → Ashe Lake Sand & Gravel Inc; 1987-05-12 to current/open; source msha-controller-operator-history