# Relationship history for MSHA mine 3002299

Current hierarchy: **Imerys S A → NYCO Minerals Inc → Lewis 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:** Jon  Rhine → Lewis Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Interpace Corp → Lewis Mine; 1978-03-09 to 1979-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Jon  Rhine → Interpace Corp; 1978-03-09 to 1979-07-31; source msha-controller-operator-history
- **operator_operates_mine:** NYCO Minerals Inc → Lewis Mine; 1979-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fording Inc → Lewis Mine; 1979-08-01 to 2008-03-13; source msha-controller-operator-history
- **controller_controls_operator:** Fording Inc → NYCO Minerals Inc; 1979-08-01 to 2008-03-13; source msha-controller-operator-history
- **controller_controls_mine:** Rolling Rock Minerals Inc → Lewis Mine; 2008-03-14 to 2012-09-13; source msha-controller-operator-history
- **controller_controls_operator:** Rolling Rock Minerals Inc → NYCO Minerals Inc; 2008-03-14 to 2012-09-13; source msha-controller-operator-history
- **controller_controls_mine:** S & B Industrial Minerals S A → Lewis Mine; 2012-09-14 to 2015-02-25; source msha-controller-operator-history
- **controller_controls_operator:** S & B Industrial Minerals S A → NYCO Minerals Inc; 2012-09-14 to 2015-02-25; source msha-controller-operator-history
- **controller_controls_mine:** Imerys S A → Lewis Mine; 2015-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Imerys S A → NYCO Minerals Inc; 2015-02-26 to current/open; source msha-controller-operator-history