# Relationship history for MSHA mine 3607121

Current hierarchy: **Carl  Neidlinger; Edmund  Neidlinger → S N & N Coal Company → No 4 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:** S & R Coal Company → No 4 Slope; 1981-04-01 to 1981-08-05; source msha-controller-operator-history
- **controller_controls_mine:** Schorr Kim & Dennis Reightler → No 4 Slope; 1981-04-01 to 1981-08-05; source msha-controller-operator-history
- **controller_controls_operator:** Schorr Kim & Dennis Reightler → S & R Coal Company; 1981-04-01 to 1981-08-05; source msha-controller-operator-history
- **operator_operates_mine:** K Y & K Coal Company → No 4 Slope; 1981-08-06 to 1983-07-10; source msha-controller-operator-history
- **controller_controls_mine:** Yorty John L--Roy & Richard Kaufman → No 4 Slope; 1981-08-06 to 1983-07-10; source msha-controller-operator-history
- **controller_controls_operator:** Yorty John L--Roy & Richard Kaufman → K Y & K Coal Company; 1981-08-06 to 1983-07-10; source msha-controller-operator-history
- **controller_controls_mine:** Carl  Neidlinger et al → No 4 Slope; 1983-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** S N & N Coal Company → No 4 Slope; 1983-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl  Neidlinger et al → S N & N Coal Company; 1983-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edmund  Neidlinger et al → S N & N Coal Company; 1983-07-11 to current/open; source msha-controller-operator-history