# Relationship history for MSHA mine 4404543

Current hierarchy: **Arch Resources Inc → Lone Mountain Processing Inc → Black Mountain 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:** Jones Dean → Black Mountain No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles D  Litton → Black Mountain No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dean Jones Coal Company Inc → Black Mountain No 1; 1976-11-01 to 1980-06-23; source msha-controller-operator-history
- **controller_controls_operator:** Jones Dean → Dean Jones Coal Company Inc; 1976-11-01 to 1980-06-23; source msha-controller-operator-history
- **operator_operates_mine:** T & T Darby Coal Company Inc → Black Mountain No 1; 1980-06-24 to 1982-07-14; source msha-controller-operator-history
- **controller_controls_operator:** Charles D  Litton → T & T Darby Coal Company Inc; 1980-06-24 to 1982-07-14; source msha-controller-operator-history
- **operator_operates_mine:** Benco Inc → Black Mountain No 1; 1982-07-15 to 1992-02-06; source msha-controller-operator-history
- **controller_controls_mine:** Johnston Clarence P Jr → Black Mountain No 1; 1982-07-15 to 1992-02-06; source msha-controller-operator-history
- **controller_controls_operator:** Johnston Clarence P Jr → Benco Inc; 1982-07-15 to 1992-02-06; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc et al → Black Mountain No 1; 1991-07-13 to 2005-09-19; source msha-controller-operator-history
- **operator_operates_mine:** Black Mountain Mining Company → Black Mountain No 1; 1992-02-07 to 1994-06-26; source msha-controller-operator-history
- **controller_controls_mine:** (Donald) Todd  Kiscaden et al → Black Mountain No 1; 1992-02-07 to 1995-05-18; source msha-controller-operator-history
- **controller_controls_operator:** (Donald) Todd  Kiscaden et al → Black Mountain Mining Company; 1992-02-07 to 1994-06-26; source msha-controller-operator-history
- **operator_operates_mine:** Lone Mountain Processing Inc → Black Mountain No 1; 1994-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc et al → Lone Mountain Processing Inc; 1994-06-27 to 2005-09-19; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → Black Mountain No 1; 2005-09-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → Lone Mountain Processing Inc; 2005-09-20 to current/open; source msha-controller-operator-history