# Relationship history for MSHA mine 3607171

Current hierarchy: **Nestico Nick → L & W Coal Company → No 2 Slope**

- 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:** Stanchick Anthony--Albert Wilk Et Al → No 2 Slope; 1981-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Two Way Coal Company → No 2 Slope; 1981-07-01 to 1988-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Stanchick Anthony--Albert Wilk Et Al → Two Way Coal Company; 1981-07-01 to 1988-05-31; source msha-controller-operator-history
- **operator_operates_mine:** L & W Coal Company Inc → No 2 Slope; 1988-06-01 to 1991-10-02; source msha-controller-operator-history
- **controller_controls_mine:** Linkus Edward J Jr → No 2 Slope; 1988-06-01 to 1991-10-02; source msha-controller-operator-history
- **controller_controls_operator:** Linkus Edward J Jr → L & W Coal Company Inc; 1988-06-01 to 1991-10-02; source msha-controller-operator-history
- **operator_operates_mine:** L & W Coal Company → No 2 Slope; 1991-10-03 to 1991-12-09; source msha-controller-operator-history
- **controller_controls_mine:** Swank Garry L → No 2 Slope; 1991-10-03 to 1991-12-09; source msha-controller-operator-history
- **controller_controls_operator:** Swank Garry L → L & W Coal Company; 1991-10-03 to 1991-12-09; source msha-controller-operator-history
- **operator_operates_mine:** L & W Coal Company → No 2 Slope; 1991-12-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nestico Nick → No 2 Slope; 1991-12-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nestico Nick → L & W Coal Company; 1991-12-10 to current/open; source msha-controller-operator-history