# Relationship history for MSHA mine 1700711

Current hierarchy: **Dana  Mc Quade; Ross  Mc Quade → A E Mcquade & Sons Inc → TELESMITH 36 CONE**

- 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:** Ross  Mc Quade  et al → TELESMITH 36 CONE; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** A E Mcquade & Sons Inc → TELESMITH 36 CONE; 2001-08-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ross  Mc Quade  et al → A E Mcquade & Sons Inc; 2001-08-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dana  Mc Quade  et al → A E Mcquade & Sons Inc; 2001-08-30 to current/open; source msha-controller-operator-history