# Relationship history for MSHA mine 0102211

Current hierarchy: **Mc Collum Tim → Jefferson Energy Corp → Abernant Pit #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:** Jefferson Energy Inc → Abernant Pit #1; 1980-05-01 to 1980-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Milam Mike → Abernant Pit #1; 1980-05-01 to 1980-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Milam Mike → Jefferson Energy Inc; 1980-05-01 to 1980-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Jefferson Energy Corp → Abernant Pit #1; 1980-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Collum Tim → Abernant Pit #1; 1980-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Collum Tim → Jefferson Energy Corp; 1980-09-01 to current/open; source msha-controller-operator-history