# Relationship history for MSHA mine 4702927

Current hierarchy: **EVS Master Holdco LLC → Eden Stone Co., LLC → Rock Ledge Property**

- 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:** William  Gesell et al → Rock Ledge Property; 1950-01-01 to 2012-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Fisher Stone → Rock Ledge Property; 1991-05-01 to 1994-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Harlyn  Fisher → Rock Ledge Property; 1991-05-01 to 1994-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Harlyn  Fisher → Fisher Stone; 1991-05-01 to 1994-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Niagara Stone, Inc. → Rock Ledge Property; 1994-04-01 to 2019-11-03; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Le Ferber → Rock Ledge Property; 1994-04-01 to 2014-09-01; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Le Ferber → Niagara Stone, Inc.; 1994-04-01 to 2014-09-01; source msha-controller-operator-history
- **controller_controls_mine:** David  Wirtz → Rock Ledge Property; 2013-01-01 to 2016-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Nast → Rock Ledge Property; 2014-09-02 to 2018-06-28; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Nast → Niagara Stone, Inc.; 2014-09-02 to 2018-06-28; source msha-controller-operator-history
- **controller_controls_mine:** William  Gesell et al → Rock Ledge Property; 2016-04-01 to 2023-06-27; source msha-controller-operator-history
- **controller_controls_mine:** William  Gesell et al → Rock Ledge Property; 2018-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Gesell et al → Niagara Stone, Inc.; 2018-06-29 to 2019-11-03; source msha-controller-operator-history
- **operator_operates_mine:** Eden Stone Co., LLC → Rock Ledge Property; 2019-11-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Wirtz → Eden Stone Co., LLC; 2019-11-04 to 2016-03-31; source msha-controller-operator-history
- **controller_controls_operator:** William  Gesell et al → Eden Stone Co., LLC; 2019-11-04 to 2012-12-31; source msha-controller-operator-history
- **controller_controls_operator:** William  Gesell et al → Eden Stone Co., LLC; 2019-11-04 to 2023-06-27; source msha-controller-operator-history
- **controller_controls_mine:** EVS Master Holdco LLC → Rock Ledge Property; 2023-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** EVS Master Holdco LLC → Eden Stone Co., LLC; 2023-06-28 to current/open; source msha-controller-operator-history