# Relationship history for MSHA mine 1511701

Current hierarchy: **Rookard Jack & Hobert C Hayes → Parkway Preparation & Sales Inc → Prep 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:** Hereford George → Prep 1; 1974-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wallins Creek Coal Company Inc → Prep 1; 1978-12-01 to 1982-01-11; source msha-controller-operator-history
- **controller_controls_operator:** Hereford George → Wallins Creek Coal Company Inc; 1978-12-01 to 1982-01-11; source msha-controller-operator-history
- **operator_operates_mine:** International Shasta Resources Ltd → Prep 1; 1982-01-12 to 1985-08-12; source msha-controller-operator-history
- **controller_controls_mine:** Faulkner Harry → Prep 1; 1982-01-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Faulkner Harry → International Shasta Resources Ltd; 1982-01-12 to 1985-08-12; source msha-controller-operator-history
- **operator_operates_mine:** Hardcastle Coal Yard Inc → Prep 1; 1985-08-13 to 1988-02-01; source msha-controller-operator-history
- **controller_controls_mine:** Seale Ramona → Prep 1; 1985-08-13 to 1988-02-01; source msha-controller-operator-history
- **controller_controls_operator:** Seale Ramona → Hardcastle Coal Yard Inc; 1985-08-13 to 1988-02-01; source msha-controller-operator-history
- **operator_operates_mine:** Hardcastle Coal Yard → Prep 1; 1988-02-02 to 1988-05-22; source msha-controller-operator-history
- **controller_controls_mine:** Jones James → Prep 1; 1988-02-02 to 1988-05-22; source msha-controller-operator-history
- **controller_controls_operator:** Jones James → Hardcastle Coal Yard; 1988-02-02 to 1988-05-22; source msha-controller-operator-history
- **operator_operates_mine:** White Enterprises → Prep 1; 1988-05-23 to 1988-08-03; source msha-controller-operator-history
- **controller_controls_mine:** White Larry → Prep 1; 1988-05-23 to 1988-08-03; source msha-controller-operator-history
- **controller_controls_operator:** White Larry → White Enterprises; 1988-05-23 to 1988-08-03; source msha-controller-operator-history
- **operator_operates_mine:** Carole Enterprises → Prep 1; 1988-08-04 to 1989-01-29; source msha-controller-operator-history
- **controller_controls_mine:** Hale James A → Prep 1; 1988-08-04 to 1989-01-29; source msha-controller-operator-history
- **controller_controls_operator:** Hale James A → Carole Enterprises; 1988-08-04 to 1989-01-29; source msha-controller-operator-history
- **operator_operates_mine:** Parkway Preparation & Sales Inc → Prep 1; 1989-01-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rookard Jack & Hobert C Hayes → Prep 1; 1989-01-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rookard Jack & Hobert C Hayes → Parkway Preparation & Sales Inc; 1989-01-30 to current/open; source msha-controller-operator-history