# Relationship history for MSHA mine 3607602

Current hierarchy: **Albert F  Stiffler → Albert F. Stiffler → Klaka Strip**

- 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:** Mehalic Brothers → Klaka Strip; 1984-08-01 to 2001-09-23; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Mehalic et al → Klaka Strip; 1984-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Mehalic et al → Mehalic Brothers; 1984-08-01 to 2001-09-23; source msha-controller-operator-history
- **controller_controls_operator:** William  Mehalic et al → Mehalic Brothers; 1984-08-01 to 2001-09-23; source msha-controller-operator-history
- **operator_operates_mine:** Albert F. Stiffler → Klaka Strip; 2001-09-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Albert F  Stiffler → Klaka Strip; 2001-09-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Albert F  Stiffler → Albert F. Stiffler; 2001-09-24 to current/open; source msha-controller-operator-history