# Relationship history for MSHA mine 1509822

Current hierarchy: **Frontier Companies Of Alaska → 10-Tucky Farms & Stables Inc → 10-Tucky Tipple**

- 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:** Perry John → 10-Tucky Tipple; 1976-07-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wyandot Corp → 10-Tucky Tipple; 1976-07-19 to 1977-11-02; source msha-controller-operator-history
- **controller_controls_operator:** Perry John → Wyandot Corp; 1976-07-19 to 1977-11-02; source msha-controller-operator-history
- **controller_controls_mine:** Sykes Harry & John → 10-Tucky Tipple; 1977-07-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Metco Collieries → 10-Tucky Tipple; 1977-11-03 to 1979-03-14; source msha-controller-operator-history
- **controller_controls_operator:** Sykes Harry & John → Metco Collieries; 1977-11-03 to 1979-03-14; source msha-controller-operator-history
- **operator_operates_mine:** 10-Tucky Farms & Stables Inc → 10-Tucky Tipple; 1979-03-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Frontier Companies Of Alaska → 10-Tucky Tipple; 1979-03-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frontier Companies Of Alaska → 10-Tucky Farms & Stables Inc; 1979-03-15 to current/open; source msha-controller-operator-history