# Relationship history for MSHA mine 4103386

Current hierarchy: **Jones Sidney → Jones Sand & Gravel Company → Jones Sand & Gravel Pit #2**

- 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

- **controller_controls_mine:** Jones Sidney → Jones Sand & Gravel Pit #2; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gramatan Joint Venture #1 → Jones Sand & Gravel Pit #2; 1986-02-01 to 1986-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Staley Joe Sr & Joe Jr → Jones Sand & Gravel Pit #2; 1986-02-01 to 1986-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Staley Joe Sr & Joe Jr → Gramatan Joint Venture #1; 1986-02-01 to 1986-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Jones Sand & Gravel Company → Jones Sand & Gravel Pit #2; 1987-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jones Sidney → Jones Sand & Gravel Company; 1987-01-01 to current/open; source msha-controller-operator-history