# Relationship history for MSHA mine 4002272

Current hierarchy: **Tennessee Partners Ltd → Deep Down Mining Inc → Deep Down 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

- **operator_operates_mine:** Raybled Mining Corp → Deep Down No 1; 1977-07-01 to 1978-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Wolcott John F → Deep Down No 1; 1977-07-01 to 1978-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Wolcott John F → Raybled Mining Corp; 1977-07-01 to 1978-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Deep Down Mining Inc → Deep Down No 1; 1978-04-01 to 1978-06-29; source msha-controller-operator-history
- **controller_controls_mine:** Feldman Peter W → Deep Down No 1; 1978-04-01 to 1978-06-29; source msha-controller-operator-history
- **controller_controls_operator:** Feldman Peter W → Deep Down Mining Inc; 1978-04-01 to 1978-06-29; source msha-controller-operator-history
- **operator_operates_mine:** Deep Down Mining Inc → Deep Down No 1; 1978-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tennessee Partners Ltd → Deep Down No 1; 1978-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tennessee Partners Ltd → Deep Down Mining Inc; 1978-06-30 to current/open; source msha-controller-operator-history