# Relationship history for MSHA mine 0404483

Current hierarchy: **John D  Chesney → Sydney Peak Stone, Inc. → Sydney Peak Stone**

- 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:** Blake Wholesale Stone Company → Sydney Peak Stone; 1980-11-01 to 1993-09-02; source msha-controller-operator-history
- **controller_controls_mine:** Roy  Blake → Sydney Peak Stone; 1980-11-01 to 1993-09-02; source msha-controller-operator-history
- **controller_controls_operator:** Roy  Blake → Blake Wholesale Stone Company; 1980-11-01 to 1993-09-02; source msha-controller-operator-history
- **operator_operates_mine:** Sydney Peak Stone, Inc. → Sydney Peak Stone; 1993-09-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ulti-Solutions Inc → Sydney Peak Stone; 1993-09-03 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Ulti-Solutions Inc → Sydney Peak Stone, Inc.; 1993-09-03 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** John D  Chesney et al → Sydney Peak Stone; 2011-06-01 to 2022-12-31; source msha-controller-operator-history
- **controller_controls_operator:** John D  Chesney et al → Sydney Peak Stone, Inc.; 2011-06-01 to 2022-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Tommy J  Jaworsky et al → Sydney Peak Stone, Inc.; 2011-06-01 to 2022-12-31; source msha-controller-operator-history
- **controller_controls_mine:** John D  Chesney → Sydney Peak Stone; 2023-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John D  Chesney → Sydney Peak Stone, Inc.; 2023-01-01 to current/open; source msha-controller-operator-history