# Relationship history for MSHA mine 4604839

Current hierarchy: **Ramey C A → Delbarton Mining Corp → Mine 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:** Hall Henry → Mine No 1; 1974-07-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Adanac Coal Company Inc → Mine No 1; 1975-10-09 to 1984-08-28; source msha-controller-operator-history
- **controller_controls_operator:** Hall Henry → Adanac Coal Company Inc; 1975-10-09 to 1984-08-28; source msha-controller-operator-history
- **controller_controls_mine:** Ricky L  Owens → Mine No 1; 1982-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jamie Coal Corp → Mine No 1; 1984-08-29 to 1986-01-07; source msha-controller-operator-history
- **controller_controls_mine:** West David W → Mine No 1; 1984-08-29 to 1986-01-07; source msha-controller-operator-history
- **controller_controls_operator:** West David W → Jamie Coal Corp; 1984-08-29 to 1986-01-07; source msha-controller-operator-history
- **operator_operates_mine:** P K Coal Company Inc → Mine No 1; 1986-01-08 to 1986-03-12; source msha-controller-operator-history
- **controller_controls_mine:** Morgan Clayton Leo → Mine No 1; 1986-01-08 to 1989-03-13; source msha-controller-operator-history
- **controller_controls_operator:** Morgan Clayton Leo → P K Coal Company Inc; 1986-01-08 to 1986-03-12; source msha-controller-operator-history
- **operator_operates_mine:** Four-O-Mining Company Inc → Mine No 1; 1986-03-13 to 1987-09-23; source msha-controller-operator-history
- **controller_controls_operator:** Ricky L  Owens → Four-O-Mining Company Inc; 1986-03-13 to 1987-09-23; source msha-controller-operator-history
- **operator_operates_mine:** Dark Hollow Mining Corp → Mine No 1; 1987-09-24 to 1990-04-23; source msha-controller-operator-history
- **controller_controls_mine:** Blankenship Carter → Mine No 1; 1987-09-24 to 1990-04-23; source msha-controller-operator-history
- **controller_controls_operator:** Blankenship Carter → Dark Hollow Mining Corp; 1987-09-24 to 1990-04-23; source msha-controller-operator-history
- **operator_operates_mine:** Delbarton Mining Corp → Mine No 1; 1990-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ramey C A → Mine No 1; 1990-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ramey C A → Delbarton Mining Corp; 1990-04-24 to current/open; source msha-controller-operator-history