# Relationship history for MSHA mine 1510803

Current hierarchy: **Street Clifton → Street Contracting Inc → 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

- **operator_operates_mine:** Sweet Water Coal Company → No 1; 1977-10-01 to 1979-05-30; source msha-controller-operator-history
- **controller_controls_mine:** Griffith Randy & Albert Paul Pugh → No 1; 1977-10-01 to 1979-05-30; source msha-controller-operator-history
- **controller_controls_operator:** Griffith Randy & Albert Paul Pugh → Sweet Water Coal Company; 1977-10-01 to 1979-05-30; source msha-controller-operator-history
- **controller_controls_mine:** Malesko Jack → No 1; 1979-05-02 to 1988-05-22; source msha-controller-operator-history
- **operator_operates_mine:** Bluegrass Elkhorn Inc → No 1; 1979-05-31 to 1982-03-17; source msha-controller-operator-history
- **controller_controls_operator:** Malesko Jack → Bluegrass Elkhorn Inc; 1979-05-31 to 1982-03-17; source msha-controller-operator-history
- **operator_operates_mine:** Dotson Enterprises Inc → No 1; 1982-03-18 to 1984-09-10; source msha-controller-operator-history
- **controller_controls_mine:** Dotson Jerry → No 1; 1982-03-18 to 1984-09-10; source msha-controller-operator-history
- **controller_controls_operator:** Dotson Jerry → Dotson Enterprises Inc; 1982-03-18 to 1984-09-10; source msha-controller-operator-history
- **operator_operates_mine:** Street Contracting Inc → No 1; 1984-09-11 to 1987-09-21; source msha-controller-operator-history
- **controller_controls_mine:** Sloan Curtis & David Belcher → No 1; 1984-09-11 to 1987-09-21; source msha-controller-operator-history
- **controller_controls_operator:** Sloan Curtis & David Belcher → Street Contracting Inc; 1984-09-11 to 1987-09-21; source msha-controller-operator-history
- **operator_operates_mine:** Street Contracting Inc → No 1; 1987-09-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Street Clifton → No 1; 1987-09-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Street Clifton → Street Contracting Inc; 1987-09-22 to current/open; source msha-controller-operator-history