# Relationship history for MSHA mine 3401887

Current hierarchy: **Rick D  Bumpers → Stigler Stone Company, Inc. → R D #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:** Rick D  Bumpers → R D #1; 1987-06-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Red Diamond Stone Inc. → R D #1; 2002-03-11 to 2006-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Bart  Ham et al → R D #1; 2002-03-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bart  Ham et al → Red Diamond Stone Inc.; 2002-03-11 to 2006-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Tami  Ham et al → Red Diamond Stone Inc.; 2002-03-11 to 2006-07-25; source msha-controller-operator-history
- **controller_controls_mine:** James R  Parker → R D #1; 2005-02-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B & P Stone LLC → R D #1; 2006-07-26 to 2010-03-22; source msha-controller-operator-history
- **controller_controls_mine:** James R  Parker  et al → R D #1; 2006-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James R  Parker  et al → B & P Stone LLC; 2006-07-26 to 2010-03-22; source msha-controller-operator-history
- **controller_controls_operator:** Bart F  Ham  et al → B & P Stone LLC; 2006-07-26 to 2010-03-22; source msha-controller-operator-history
- **operator_operates_mine:** PARKER & SONS STONE, LLC → R D #1; 2010-03-23 to 2021-06-30; source msha-controller-operator-history
- **controller_controls_operator:** James R  Parker → PARKER & SONS STONE, LLC; 2010-03-23 to 2021-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Stigler Stone Company, Inc. → R D #1; 2021-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rick D  Bumpers → Stigler Stone Company, Inc.; 2021-07-01 to current/open; source msha-controller-operator-history