# Relationship history for MSHA mine 4406066

Current hierarchy: **Nicewonder J D → Hillside Dock Company → Dock No 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

- **controller_controls_mine:** Nicewonder J D - R L Wallen Et Al → Dock No 1; 1978-06-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Little Six Corp → Dock No 1; 1984-03-01 to 1985-10-21; source msha-controller-operator-history
- **controller_controls_operator:** Nicewonder J D - R L Wallen Et Al → Little Six Corp; 1984-03-01 to 1985-10-21; source msha-controller-operator-history
- **operator_operates_mine:** Sidco Mining Company → Dock No 1; 1985-10-22 to 1991-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Tayloe James M → Dock No 1; 1985-10-22 to 1991-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Tayloe James M → Sidco Mining Company; 1985-10-22 to 1991-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Hillside Dock Company → Dock No 1; 1992-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nicewonder J D → Dock No 1; 1992-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nicewonder J D → Hillside Dock Company; 1992-01-01 to current/open; source msha-controller-operator-history