# Relationship history for MSHA mine 0901101

Current hierarchy: **Imerys S A → Imerys Carbonates USA, INC → Imerys Cisco 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:** Imerys S A → Imerys Cisco Mine; 1989-05-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John H  Waters → Imerys Cisco Mine; 1994-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mountainside Minerals Inc → Imerys Cisco Mine; 1996-12-01 to 1998-08-31; source msha-controller-operator-history
- **controller_controls_operator:** John H  Waters → Mountainside Minerals Inc; 1996-12-01 to 1998-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Oglebay Norton Company → Imerys Cisco Mine; 1998-06-22 to 2008-02-12; source msha-controller-operator-history
- **operator_operates_mine:** O-N Minerals (Filler Products) Company → Imerys Cisco Mine; 1998-09-01 to 2008-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Oglebay Norton Company → Imerys Cisco Mine; 1998-09-01 to 2008-02-12; source msha-controller-operator-history
- **controller_controls_operator:** Oglebay Norton Company → O-N Minerals (Filler Products) Company; 1998-09-01 to 2008-02-12; source msha-controller-operator-history
- **controller_controls_mine:** Carmeuse Holding SA → Imerys Cisco Mine; 2008-02-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carmeuse Holding SA → O-N Minerals (Filler Products) Company; 2008-02-13 to 2008-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Carmeuse L&S → Imerys Cisco Mine; 2009-01-01 to 2023-09-24; source msha-controller-operator-history
- **controller_controls_operator:** Oglebay Norton Company → Carmeuse L&S; 2009-01-01 to 2008-02-12; source msha-controller-operator-history
- **controller_controls_operator:** Carmeuse Holding SA → Carmeuse L&S; 2009-01-01 to 2023-09-24; source msha-controller-operator-history
- **operator_operates_mine:** Imerys Carbonates USA, INC → Imerys Cisco Mine; 2023-09-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Imerys S A → Imerys Carbonates USA, INC; 2023-09-25 to current/open; source msha-controller-operator-history