# Relationship history for MSHA mine 4406620

Current hierarchy: **Jerry  Skeens; Eddie  Skeens → Old Dominion Energy Inc → No 4 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** United  Company → No 4 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jerry  Skeens  et al → No 4 Mine; 1981-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wellmore Coal Corp → No 4 Mine; 1990-12-01 to 1991-06-11; source msha-controller-operator-history
- **controller_controls_operator:** United  Company → Wellmore Coal Corp; 1990-12-01 to 1991-06-11; source msha-controller-operator-history
- **operator_operates_mine:** Old Dominion Energy Inc → No 4 Mine; 1991-06-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Skeens  et al → Old Dominion Energy Inc; 1991-06-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eddie  Skeens  et al → Old Dominion Energy Inc; 1991-06-12 to current/open; source msha-controller-operator-history