# Relationship history for MSHA mine 4405087

Current hierarchy: **Pittston Company → Paramont Coal Corp → Deep Mine #27a**

- 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:** Elkins Charles C Et Al → Deep Mine #27a; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Elkins William T → Deep Mine #27a; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Elkins Kermit → Deep Mine #27a; 1978-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Elkins Energy Corp → Deep Mine #27a; 1978-08-01 to 1978-09-14; source msha-controller-operator-history
- **controller_controls_operator:** Elkins Charles C Et Al → Elkins Energy Corp; 1978-08-01 to 1978-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Delight Coal Corp → Deep Mine #27a; 1978-09-15 to 1982-03-23; source msha-controller-operator-history
- **controller_controls_operator:** Elkins Kermit → Delight Coal Corp; 1978-09-15 to 1982-03-23; source msha-controller-operator-history
- **operator_operates_mine:** Big Ten Coal Corp → Deep Mine #27a; 1982-03-24 to 1985-03-19; source msha-controller-operator-history
- **controller_controls_operator:** Elkins William T → Big Ten Coal Corp; 1982-03-24 to 1985-03-19; source msha-controller-operator-history
- **operator_operates_mine:** G M S I Coal Corp → Deep Mine #27a; 1985-03-20 to 1986-12-21; source msha-controller-operator-history
- **controller_controls_mine:** Malcom  Gatt → Deep Mine #27a; 1985-03-20 to 1986-12-21; source msha-controller-operator-history
- **controller_controls_operator:** Malcom  Gatt → G M S I Coal Corp; 1985-03-20 to 1986-12-21; source msha-controller-operator-history
- **controller_controls_mine:** Pittston Company → Deep Mine #27a; 1986-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** G M S I Coal Corp → Deep Mine #27a; 1986-12-22 to 1998-04-12; source msha-controller-operator-history
- **controller_controls_mine:** Barton Delmar → Deep Mine #27a; 1986-12-22 to 1998-04-12; source msha-controller-operator-history
- **controller_controls_operator:** Barton Delmar → G M S I Coal Corp; 1986-12-22 to 1998-04-12; source msha-controller-operator-history
- **operator_operates_mine:** Paramont Coal Corp → Deep Mine #27a; 1998-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pittston Company → Paramont Coal Corp; 1998-04-13 to current/open; source msha-controller-operator-history