# Relationship history for MSHA mine 4502737

Current hierarchy: **Gordon  Pogorelc → Rock Services Inc → PART 48-F**

- 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:** James C O'Connor → PART 48-F; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J C O'Connor Construction Inc → PART 48-F; 1980-11-01 to 1994-02-14; source msha-controller-operator-history
- **controller_controls_operator:** James C O'Connor → J C O'Connor Construction Inc; 1980-11-01 to 1994-02-14; source msha-controller-operator-history
- **operator_operates_mine:** Rock Services Inc → PART 48-F; 1994-02-15 to 2018-01-21; source msha-controller-operator-history
- **controller_controls_mine:** Gordon  Pogorelc Et Al → PART 48-F; 1994-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gordon  Pogorelc Et Al → Rock Services Inc; 1994-02-15 to 2018-01-21; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Side Sand & Gravel LLC → PART 48-F; 2018-01-22 to 2026-03-04; source msha-controller-operator-history
- **controller_controls_mine:** Howard  Wheeler → PART 48-F; 2018-01-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Howard  Wheeler → Mountain Side Sand & Gravel LLC; 2018-01-22 to 2026-03-04; source msha-controller-operator-history
- **operator_operates_mine:** Rock Services Inc → PART 48-F; 2026-03-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gordon  Pogorelc Et Al → Rock Services Inc; 2026-03-05 to current/open; source msha-controller-operator-history