# Relationship history for MSHA mine 0202969

Current hierarchy: **E Kay  Perkins → Perkins Cinders, Inc. → Cooley Knoll 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:** E Kay  Perkins → Cooley Knoll Pit; 1983-11-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hatchmark Industries Inc → Cooley Knoll Pit; 2002-04-08 to 2004-08-01; source msha-controller-operator-history
- **controller_controls_mine:** Gary  Solomon et al → Cooley Knoll Pit; 2002-04-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Solomon et al → Hatchmark Industries Inc; 2002-04-08 to 2004-08-01; source msha-controller-operator-history
- **controller_controls_operator:** Danny  Hatch et al → Hatchmark Industries Inc; 2002-04-08 to 2004-08-01; source msha-controller-operator-history
- **operator_operates_mine:** Perkins Cinders, Inc. → Cooley Knoll Pit; 2004-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** E Kay  Perkins → Perkins Cinders, Inc.; 2004-08-02 to current/open; source msha-controller-operator-history