# Relationship history for MSHA mine 4002421

Current hierarchy: **Nagy Charles → Spartan Mining Inc → Alice No 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

- **controller_controls_mine:** Robertson C T → Alice No 1; 1975-05-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tenn-Tex Minerals Inc → Alice No 1; 1978-04-01 to 1978-07-04; source msha-controller-operator-history
- **controller_controls_operator:** Robertson C T → Tenn-Tex Minerals Inc; 1978-04-01 to 1978-07-04; source msha-controller-operator-history
- **operator_operates_mine:** Elevated Energy Inc → Alice No 1; 1978-07-05 to 1979-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Rugg Frederick U Iii → Alice No 1; 1978-07-05 to 1979-12-02; source msha-controller-operator-history
- **controller_controls_operator:** Rugg Frederick U Iii → Elevated Energy Inc; 1978-07-05 to 1979-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Spartan Mining Inc → Alice No 1; 1979-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nagy Charles → Alice No 1; 1979-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nagy Charles → Spartan Mining Inc; 1979-02-01 to current/open; source msha-controller-operator-history