# Relationship history for MSHA mine 1516993

Current hierarchy: **(Donald) Todd  Kiscaden; Scott  Kiscaden → Kiah Creek Mining Company → No 3**

- 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:** (Donald) Todd  Kiscaden et al → No 3; 1989-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kiah Creek Mining Company → No 3; 1990-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** (Donald) Todd  Kiscaden et al → Kiah Creek Mining Company; 1990-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott  Kiscaden et al → Kiah Creek Mining Company; 1990-10-01 to current/open; source msha-controller-operator-history