# Relationship history for MSHA mine 1500082

Current hierarchy: **R Chad  Crabtree → Park City Stone, LLC → Park City Stone, LLC**

- 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:** Pace Construction Company Inc → Park City Stone, LLC; 1950-01-01 to 1992-07-07; source msha-controller-operator-history
- **controller_controls_mine:** Clark Robert O → Park City Stone, LLC; 1950-01-01 to 1992-07-07; source msha-controller-operator-history
- **controller_controls_operator:** Clark Robert O → Pace Construction Company Inc; 1950-01-01 to 1992-07-07; source msha-controller-operator-history
- **controller_controls_mine:** James D  Scott → Park City Stone, LLC; 1988-11-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Scotty'S Contracting & Stone Company → Park City Stone, LLC; 1992-07-08 to 2012-08-29; source msha-controller-operator-history
- **controller_controls_operator:** James D  Scott → Scotty'S Contracting & Stone Company; 1992-07-08 to 2012-08-29; source msha-controller-operator-history
- **operator_operates_mine:** Park City Stone, LLC → Park City Stone, LLC; 2012-08-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** R Chad  Crabtree → Park City Stone, LLC; 2012-08-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** R Chad  Crabtree → Park City Stone, LLC; 2012-08-30 to current/open; source msha-controller-operator-history