# Relationship history for MSHA mine 1401673

Current hierarchy: **Bryan H Whitmore; Cecil  Lane → Pyramid Stone LLC → Pyramid Stone LLC**

- 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

- **operator_operates_mine:** Pyramid Stone LLC → Pyramid Stone LLC; 2007-03-26 to 2013-02-13; source msha-controller-operator-history
- **controller_controls_mine:** Bob H  Davis → Pyramid Stone LLC; 2007-03-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bob H  Davis → Pyramid Stone LLC; 2007-03-26 to 2013-02-13; source msha-controller-operator-history
- **operator_operates_mine:** Pyramid Stone LLC → Pyramid Stone LLC; 2013-02-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bryan H Whitmore et al → Pyramid Stone LLC; 2013-02-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bryan H Whitmore et al → Pyramid Stone LLC; 2013-02-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cecil  Lane et al → Pyramid Stone LLC; 2013-02-14 to current/open; source msha-controller-operator-history