# Relationship history for MSHA mine 4404261

Current hierarchy: **Susie A  Smith; Elmer  Fuller → Kyn Coal Company Inc → No 3 Mine**

- 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:** Derek  Potter et al → No 3 Mine; 1950-01-01 to 1977-10-02; source msha-controller-operator-history
- **controller_controls_mine:** Edwards Danie G → No 3 Mine; 1974-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Trinity Coal Corp → No 3 Mine; 1976-01-26 to 1976-10-13; source msha-controller-operator-history
- **controller_controls_operator:** Edwards Danie G → Trinity Coal Corp; 1976-01-26 to 1976-10-13; source msha-controller-operator-history
- **operator_operates_mine:** Crystal Coal Corp Inc → No 3 Mine; 1976-10-14 to 1977-09-19; source msha-controller-operator-history
- **controller_controls_operator:** Derek  Potter et al → Crystal Coal Corp Inc; 1976-10-14 to 1977-09-19; source msha-controller-operator-history
- **controller_controls_mine:** David M  Maynard → No 3 Mine; 1977-05-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mabo Coal Company Inc → No 3 Mine; 1977-09-20 to 1981-07-21; source msha-controller-operator-history
- **controller_controls_operator:** David M  Maynard → Mabo Coal Company Inc; 1977-09-20 to 1981-07-21; source msha-controller-operator-history
- **controller_controls_mine:** Susie A  Smith et al → No 3 Mine; 1979-10-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kyn Coal Company Inc → No 3 Mine; 1981-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Susie A  Smith et al → Kyn Coal Company Inc; 1981-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elmer  Fuller et al → Kyn Coal Company Inc; 1981-07-22 to current/open; source msha-controller-operator-history