# Relationship history for MSHA mine 3605738

Current hierarchy: **Linkus Edward J Jr → Deep Mine Coal Company Inc → 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

- **operator_operates_mine:** Dooless & Seemore Coal Company → No 2 Slope; 1975-09-15 to 1976-03-23; source msha-controller-operator-history
- **controller_controls_mine:** Haas Maynard → No 2 Slope; 1975-09-15 to 1976-03-23; source msha-controller-operator-history
- **controller_controls_operator:** Haas Maynard → Dooless & Seemore Coal Company; 1975-09-15 to 1976-03-23; source msha-controller-operator-history
- **operator_operates_mine:** N B C Coal Company → No 2 Slope; 1976-03-24 to 1979-10-23; source msha-controller-operator-history
- **controller_controls_mine:** Karstetter Lamar & Melvin--Maynard Haas → No 2 Slope; 1976-03-24 to 1979-10-23; source msha-controller-operator-history
- **controller_controls_operator:** Karstetter Lamar & Melvin--Maynard Haas → N B C Coal Company; 1976-03-24 to 1979-10-23; source msha-controller-operator-history
- **operator_operates_mine:** Deep Mine Coal Company Inc → No 2 Slope; 1979-10-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Linkus Edward J Jr → No 2 Slope; 1979-10-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Linkus Edward J Jr → Deep Mine Coal Company Inc; 1979-10-24 to current/open; source msha-controller-operator-history