# Relationship history for MSHA mine 4606613

Current hierarchy: **Legg Larry T → Good News Inc → #1 Surface 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:** Poval Corporation → #1 Surface Mine; 1979-10-17 to 1984-12-20; source msha-controller-operator-history
- **operator_operates_mine:** Elk River Sewell Coal Company → #1 Surface Mine; 1983-02-01 to 1983-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Poval Corporation → Elk River Sewell Coal Company; 1983-02-01 to 1983-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Fisher Run Coal Company Inc → #1 Surface Mine; 1983-04-01 to 1984-05-07; source msha-controller-operator-history
- **controller_controls_mine:** Keller Lewis E Jr & Sr → #1 Surface Mine; 1983-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keller Lewis E Jr & Sr → Fisher Run Coal Company Inc; 1983-04-01 to 1984-05-07; source msha-controller-operator-history
- **operator_operates_mine:** M & H Coal Company Inc → #1 Surface Mine; 1984-05-08 to 1986-02-23; source msha-controller-operator-history
- **controller_controls_mine:** Hawkins Denver A Et Al → #1 Surface Mine; 1984-05-08 to 1987-08-23; source msha-controller-operator-history
- **controller_controls_operator:** Hawkins Denver A Et Al → M & H Coal Company Inc; 1984-05-08 to 1986-02-23; source msha-controller-operator-history
- **operator_operates_mine:** E F A Inc → #1 Surface Mine; 1986-02-24 to 1988-04-11; source msha-controller-operator-history
- **controller_controls_mine:** Nutter Jack → #1 Surface Mine; 1986-02-24 to 1988-04-11; source msha-controller-operator-history
- **controller_controls_operator:** Nutter Jack → E F A Inc; 1986-02-24 to 1988-04-11; source msha-controller-operator-history
- **operator_operates_mine:** Good News Inc → #1 Surface Mine; 1988-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Legg Larry T → #1 Surface Mine; 1988-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Legg Larry T → Good News Inc; 1988-04-12 to current/open; source msha-controller-operator-history