# Relationship history for MSHA mine 3606678

Current hierarchy: **Trisha  Shulsky → Heritage Mining Company → Heritage #1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Lochrie Coal Company → Heritage #1; 1978-05-01 to 1994-12-07; source msha-controller-operator-history
- **controller_controls_mine:** Gilbert  Lochrie et al → Heritage #1; 1978-05-01 to 1994-12-07; source msha-controller-operator-history
- **controller_controls_operator:** Gilbert  Lochrie et al → Lochrie Coal Company; 1978-05-01 to 1994-12-07; source msha-controller-operator-history
- **operator_operates_mine:** Heritage Mining Company → Heritage #1; 1994-12-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cynthia M  Cooney → Heritage #1; 1994-12-08 to 2015-10-26; source msha-controller-operator-history
- **controller_controls_operator:** Cynthia M  Cooney → Heritage Mining Company; 1994-12-08 to 2015-10-26; source msha-controller-operator-history
- **controller_controls_mine:** Trisha  Shulsky → Heritage #1; 2015-10-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Trisha  Shulsky → Heritage Mining Company; 2015-10-27 to current/open; source msha-controller-operator-history