# Relationship history for MSHA mine 1510993

Current hierarchy: **Short Kermit → Jasco & Associates Inc → Jasco #1**

- 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:** K H C Inc → Jasco #1; 1977-12-01 to 1978-09-18; source msha-controller-operator-history
- **controller_controls_mine:** Rasnick Elmer → Jasco #1; 1977-12-01 to 1978-09-18; source msha-controller-operator-history
- **controller_controls_operator:** Rasnick Elmer → K H C Inc; 1977-12-01 to 1978-09-18; source msha-controller-operator-history
- **operator_operates_mine:** K H C Inc → Jasco #1; 1978-09-19 to 1981-02-22; source msha-controller-operator-history
- **controller_controls_mine:** Sizemore Harold & David → Jasco #1; 1978-09-19 to 1981-02-22; source msha-controller-operator-history
- **controller_controls_operator:** Sizemore Harold & David → K H C Inc; 1978-09-19 to 1981-02-22; source msha-controller-operator-history
- **operator_operates_mine:** Jasco & Associates Inc → Jasco #1; 1981-02-23 to 1982-02-02; source msha-controller-operator-history
- **controller_controls_mine:** Gayheart James E → Jasco #1; 1981-02-23 to 1982-02-02; source msha-controller-operator-history
- **controller_controls_operator:** Gayheart James E → Jasco & Associates Inc; 1981-02-23 to 1982-02-02; source msha-controller-operator-history
- **operator_operates_mine:** Jasco & Associates Inc → Jasco #1; 1982-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Short Kermit → Jasco #1; 1982-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Short Kermit → Jasco & Associates Inc; 1982-02-03 to current/open; source msha-controller-operator-history