# Relationship history for MSHA mine 3609976

Current hierarchy: **Matthew  Ward; Alfred J  Brown → M & D Anthracite Coal → Slope #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:** Kerry  Harris → Slope #1; 2013-02-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** S & J Coal Mine → Slope #1; 2016-05-10 to 2017-04-12; source msha-controller-operator-history
- **controller_controls_operator:** Kerry  Harris → S & J Coal Mine; 2016-05-10 to 2017-04-12; source msha-controller-operator-history
- **operator_operates_mine:** M & D Anthracite Coal Company → Slope #1; 2017-04-13 to 2021-10-25; source msha-controller-operator-history
- **controller_controls_mine:** Matthew G  Fidler et al → Slope #1; 2017-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew G  Fidler et al → M & D Anthracite Coal Company; 2017-04-13 to 2021-10-25; source msha-controller-operator-history
- **controller_controls_operator:** David R  Shoffler et al → M & D Anthracite Coal Company; 2017-04-13 to 2021-10-25; source msha-controller-operator-history
- **operator_operates_mine:** M & D Anthracite Coal → Slope #1; 2021-10-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Matthew  Ward et al → Slope #1; 2021-10-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew  Ward et al → M & D Anthracite Coal; 2021-10-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alfred J  Brown et al → M & D Anthracite Coal; 2021-10-26 to current/open; source msha-controller-operator-history