# Relationship history for MSHA mine 1516864

Current hierarchy: **Ellison Carl → K-Mac Inc → #1 Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Fritz Jerry → #1 Mine; 1990-02-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Leigh Energy Inc → #1 Mine; 1990-04-01 to 1993-07-29; source msha-controller-operator-history
- **controller_controls_operator:** Fritz Jerry → Leigh Energy Inc; 1990-04-01 to 1993-07-29; source msha-controller-operator-history
- **controller_controls_mine:** James A  Dean et al → #1 Mine; 1991-06-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ibold Inc → #1 Mine; 1993-07-30 to 1995-09-07; source msha-controller-operator-history
- **controller_controls_operator:** James A  Dean et al → Ibold Inc; 1993-07-30 to 1995-09-07; source msha-controller-operator-history
- **operator_operates_mine:** K-Mac Inc → #1 Mine; 1995-09-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ellison Carl → #1 Mine; 1995-09-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ellison Carl → K-Mac Inc; 1995-09-08 to current/open; source msha-controller-operator-history