# Relationship history for MSHA mine 4801265

Current hierarchy: **Clark Lynn F → Clark'S Ready-Mix & Construction Inc → South Park School Section Pit**

- 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:** Clark Lynn F → South Park School Section Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brent  Foster et al → South Park School Section Pit; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **operator_operates_mine:** H-K Contractors Inc → South Park School Section Pit; 1979-01-01 to 1980-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Brent  Foster et al → H-K Contractors Inc; 1979-01-01 to 1980-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Clark'S Ready-Mix & Construction Inc → South Park School Section Pit; 1980-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clark Lynn F → Clark'S Ready-Mix & Construction Inc; 1980-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → South Park School Section Pit; 2007-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → H-K Contractors Inc; 2007-11-16 to 1980-03-31; source msha-controller-operator-history