# Relationship history for MSHA mine 3610179

Current hierarchy: **Gary  Podunajec → Wayco Inc. → Didder Ridge Quarry**

- 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:** Joseph  Podunajec et al → Didder Ridge Quarry; 1994-04-01 to 2016-04-06; source msha-controller-operator-history
- **operator_operates_mine:** Wayco Inc. → Didder Ridge Quarry; 2016-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gary  Podunajec → Didder Ridge Quarry; 2016-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Podunajec → Wayco Inc.; 2016-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Podunajec et al → Wayco Inc.; 2016-04-07 to 2016-04-06; source msha-controller-operator-history