# Relationship history for MSHA mine 0400111

Current hierarchy: **David P  Grimsley → Cal Rock Products LLC → Cal Rock Products 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:** Fmc Corp → Cal Rock Products LLC; 1950-01-01 to 1985-10-21; source msha-controller-operator-history
- **controller_controls_mine:** FMC Corp → Cal Rock Products LLC; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** FMC Corp → Fmc Corp; 1950-01-01 to 1985-10-21; source msha-controller-operator-history
- **operator_operates_mine:** San Benito Aggregates Inc → Cal Rock Products LLC; 1985-10-22 to 2004-03-31; source msha-controller-operator-history
- **controller_controls_mine:** David P  Grimsley → Cal Rock Products LLC; 1985-10-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David P  Grimsley → San Benito Aggregates Inc; 1985-10-22 to 2004-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Cal Rock Products LLC → Cal Rock Products LLC; 2004-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David P  Grimsley  et al → Cal Rock Products LLC; 2004-04-01 to 2013-03-25; source msha-controller-operator-history
- **controller_controls_operator:** David P  Grimsley  et al → Cal Rock Products LLC; 2004-04-01 to 2013-03-25; source msha-controller-operator-history
- **controller_controls_operator:** Tim R  Gorshe  et al → Cal Rock Products LLC; 2004-04-01 to 2013-03-25; source msha-controller-operator-history
- **controller_controls_mine:** David P  Grimsley → Cal Rock Products LLC; 2013-03-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David P  Grimsley → Cal Rock Products LLC; 2013-03-26 to current/open; source msha-controller-operator-history