# Relationship history for MSHA mine 4404443

Current hierarchy: **Cecil  Nichols → Worm Coal Company Corp → 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:** Perry Allen  Whited → No 1; 1974-10-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Van Dyke Burton & Hassell Davis → No 1; 1974-11-21 to 1981-07-14; source msha-controller-operator-history
- **operator_operates_mine:** Virginian Coal Company → No 1; 1976-05-07 to 1976-08-04; source msha-controller-operator-history
- **controller_controls_mine:** Wright Larry → No 1; 1976-05-07 to 1976-08-04; source msha-controller-operator-history
- **controller_controls_operator:** Wright Larry → Virginian Coal Company; 1976-05-07 to 1976-08-04; source msha-controller-operator-history
- **operator_operates_mine:** Davis & Whited Coal Company Inc → No 1; 1976-08-05 to 1979-03-27; source msha-controller-operator-history
- **controller_controls_operator:** Perry Allen  Whited → Davis & Whited Coal Company Inc; 1976-08-05 to 1979-03-27; source msha-controller-operator-history
- **operator_operates_mine:** B & K Coal Company → No 1; 1979-03-28 to 1979-12-05; source msha-controller-operator-history
- **controller_controls_mine:** Boggs Glenn R Et Al → No 1; 1979-03-28 to 1979-12-05; source msha-controller-operator-history
- **controller_controls_operator:** Boggs Glenn R Et Al → B & K Coal Company; 1979-03-28 to 1979-12-05; source msha-controller-operator-history
- **operator_operates_mine:** D & V Coal Company → No 1; 1979-12-06 to 1980-10-13; source msha-controller-operator-history
- **controller_controls_operator:** Van Dyke Burton & Hassell Davis → D & V Coal Company; 1979-12-06 to 1980-10-13; source msha-controller-operator-history
- **operator_operates_mine:** Hope Mining Company Inc → No 1; 1980-10-14 to 1981-03-02; source msha-controller-operator-history
- **controller_controls_mine:** Hopkins Willard L → No 1; 1980-10-14 to 1981-03-02; source msha-controller-operator-history
- **controller_controls_operator:** Hopkins Willard L → Hope Mining Company Inc; 1980-10-14 to 1981-03-02; source msha-controller-operator-history
- **operator_operates_mine:** P & L Coal Company → No 1; 1981-03-03 to 1981-06-15; source msha-controller-operator-history
- **controller_controls_mine:** Nichols Cecil & Gary Keen → No 1; 1981-03-03 to 1981-06-15; source msha-controller-operator-history
- **controller_controls_operator:** Nichols Cecil & Gary Keen → P & L Coal Company; 1981-03-03 to 1981-06-15; source msha-controller-operator-history
- **operator_operates_mine:** Horton & Spencer Coal Company → No 1; 1981-06-16 to 1984-04-03; source msha-controller-operator-history
- **controller_controls_mine:** Horton Samuel--Hubert Spencer Et Al → No 1; 1981-06-16 to 1984-04-03; source msha-controller-operator-history
- **controller_controls_operator:** Horton Samuel--Hubert Spencer Et Al → Horton & Spencer Coal Company; 1981-06-16 to 1984-04-03; source msha-controller-operator-history
- **operator_operates_mine:** Worm Coal Company Corp → No 1; 1984-04-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cecil  Nichols → No 1; 1984-04-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cecil  Nichols → Worm Coal Company Corp; 1984-04-04 to current/open; source msha-controller-operator-history