# Relationship history for MSHA mine 4607283

Current hierarchy: **Brown Jimmy Lee → Okemo Corp → No 17**

- 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

- **operator_operates_mine:** Celtic Industries Inc → No 17; 1987-04-01 to 1989-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Jeff  Chillag et al → No 17; 1987-04-01 to 1989-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Jeff  Chillag et al → Celtic Industries Inc; 1987-04-01 to 1989-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Carbonite Resources Inc → No 17; 1989-03-01 to 1994-03-28; source msha-controller-operator-history
- **controller_controls_mine:** Compton Kennie D → No 17; 1989-03-01 to 1994-03-28; source msha-controller-operator-history
- **controller_controls_operator:** Compton Kennie D → Carbonite Resources Inc; 1989-03-01 to 1994-03-28; source msha-controller-operator-history
- **controller_controls_mine:** Overton Roy F → No 17; 1993-12-13 to 1995-01-05; source msha-controller-operator-history
- **controller_controls_mine:** Endicott Shelby R → No 17; 1994-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Harold Coal Company Inc → No 17; 1994-03-29 to 1995-01-05; source msha-controller-operator-history
- **controller_controls_operator:** Overton Roy F → Harold Coal Company Inc; 1994-03-29 to 1995-01-05; source msha-controller-operator-history
- **operator_operates_mine:** Endicott Enterprises Inc → No 17; 1995-01-06 to 1997-06-25; source msha-controller-operator-history
- **controller_controls_operator:** Endicott Shelby R → Endicott Enterprises Inc; 1995-01-06 to 1997-06-25; source msha-controller-operator-history
- **controller_controls_mine:** Brown Jimmy Lee → No 17; 1995-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Okemo Corp → No 17; 1997-06-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brown Jimmy Lee → Okemo Corp; 1997-06-26 to current/open; source msha-controller-operator-history