# Relationship history for MSHA mine 4201595

Current hierarchy: **Lawrence Jack A → New-Tech Mining Corp → Reclaim #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:** Sunnydale Mines Inc → Reclaim #1; 1979-05-01 to 1983-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Firchau Albert J → Reclaim #1; 1979-05-01 to 1983-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Firchau Albert J → Sunnydale Mines Inc; 1979-05-01 to 1983-03-31; source msha-controller-operator-history
- **operator_operates_mine:** New-Tech Mining Corp → Reclaim #1; 1983-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lawrence Jack A → Reclaim #1; 1983-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lawrence Jack A → New-Tech Mining Corp; 1983-04-01 to current/open; source msha-controller-operator-history