# Relationship history for MSHA mine 3606428

Current hierarchy: **David B  Kuperavage → Kuperavage Ent Inc. / Tuscarora Coal → Tuscarora Breaker**

- 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:** Tuscarora Coal Corp → Tuscarora Breaker; 1977-06-01 to 1982-10-29; source msha-controller-operator-history
- **controller_controls_mine:** Glen-Gery Corp → Tuscarora Breaker; 1977-06-01 to 1982-10-29; source msha-controller-operator-history
- **controller_controls_operator:** Glen-Gery Corp → Tuscarora Coal Corp; 1977-06-01 to 1982-10-29; source msha-controller-operator-history
- **controller_controls_mine:** US Anthracite Corp → Tuscarora Breaker; 1978-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kuperavage Enterprises Inc. → Tuscarora Breaker; 1982-10-30 to 2011-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Bernard J  Kuperavage Jr et al → Tuscarora Breaker; 1982-10-30 to 2009-05-25; source msha-controller-operator-history
- **controller_controls_operator:** Bernard J  Kuperavage Jr et al → Kuperavage Enterprises Inc.; 1982-10-30 to 2009-05-25; source msha-controller-operator-history
- **controller_controls_mine:** David B  Kuperavage → Tuscarora Breaker; 2009-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David B  Kuperavage → Kuperavage Enterprises Inc.; 2009-05-26 to 2011-12-31; source msha-controller-operator-history
- **operator_operates_mine:** South Tamaqua Coal Pockets, Inc. → Tuscarora Breaker; 2012-01-01 to 2016-10-18; source msha-controller-operator-history
- **controller_controls_operator:** US Anthracite Corp → South Tamaqua Coal Pockets, Inc.; 2012-01-01 to 2016-10-18; source msha-controller-operator-history
- **operator_operates_mine:** Kuperavage Ent Inc. / Tuscarora Coal → Tuscarora Breaker; 2016-10-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David B  Kuperavage → Kuperavage Ent Inc. / Tuscarora Coal; 2016-10-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bernard J  Kuperavage Jr et al → Kuperavage Ent Inc. / Tuscarora Coal; 2016-10-19 to 2009-05-25; source msha-controller-operator-history