# Relationship history for MSHA mine 3606391

Current hierarchy: **Indyke Evelyn → E M I Construction Company → Tucci-Krupar 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

- **controller_controls_mine:** Hyduke John & Tom Gower Et Al → Tucci-Krupar Strip; 1976-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cratty-Gower & Hyduke Inc → Tucci-Krupar Strip; 1977-04-01 to 1981-01-07; source msha-controller-operator-history
- **controller_controls_operator:** Hyduke John & Tom Gower Et Al → Cratty-Gower & Hyduke Inc; 1977-04-01 to 1981-01-07; source msha-controller-operator-history
- **operator_operates_mine:** E M I Construction Company → Tucci-Krupar Strip; 1981-01-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Indyke Evelyn → Tucci-Krupar Strip; 1981-01-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Indyke Evelyn → E M I Construction Company; 1981-01-08 to current/open; source msha-controller-operator-history