# Relationship history for MSHA mine 4606014

Current hierarchy: **Morgan John R & Ronnie B Nelson → Tamron Energy 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Hatfield Richard & J Charles Lockhart Et Al → #1 Mine; 1974-02-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Addair Wayne & Darrell → #1 Mine; 1976-04-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** New Elk Coal Company → #1 Mine; 1979-05-01 to 1990-02-15; source msha-controller-operator-history
- **controller_controls_operator:** Hatfield Richard & J Charles Lockhart Et Al → New Elk Coal Company; 1979-05-01 to 1990-02-15; source msha-controller-operator-history
- **operator_operates_mine:** Little Darrell Coal Company → #1 Mine; 1990-02-16 to 1990-11-12; source msha-controller-operator-history
- **controller_controls_operator:** Addair Wayne & Darrell → Little Darrell Coal Company; 1990-02-16 to 1990-11-12; source msha-controller-operator-history
- **operator_operates_mine:** Tamron Energy Inc → #1 Mine; 1990-11-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Morgan John R & Ronnie B Nelson → #1 Mine; 1990-11-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Morgan John R & Ronnie B Nelson → Tamron Energy Inc; 1990-11-13 to current/open; source msha-controller-operator-history