# Relationship history for MSHA mine 3503360

Current hierarchy: **Casey  McLennan → Da-Tone Rock Products, Inc. → Da-Tone Rock Products, Inc.**

- 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

- **operator_operates_mine:** Da-Tone Construction → Da-Tone Rock Products, Inc.; 1991-10-01 to 1998-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Robert B  Allsup → Da-Tone Rock Products, Inc.; 1991-10-01 to 1998-07-14; source msha-controller-operator-history
- **controller_controls_operator:** Robert B  Allsup → Da-Tone Construction; 1991-10-01 to 1998-07-14; source msha-controller-operator-history
- **operator_operates_mine:** Da-Tone Rock Products, Inc. → Da-Tone Rock Products, Inc.; 1998-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mike  Beckley et al → Da-Tone Rock Products, Inc.; 1998-07-15 to 2012-01-22; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Beckley et al → Da-Tone Rock Products, Inc.; 1998-07-15 to 2012-01-22; source msha-controller-operator-history
- **controller_controls_operator:** Sam  Williams  et al → Da-Tone Rock Products, Inc.; 1998-07-15 to 2012-01-22; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Salisbury et al → Da-Tone Rock Products, Inc.; 1998-07-15 to 2012-01-22; source msha-controller-operator-history
- **controller_controls_mine:** Casey  McLennan et al → Da-Tone Rock Products, Inc.; 2012-01-23 to 2014-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Casey  McLennan et al → Da-Tone Rock Products, Inc.; 2012-01-23 to 2014-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Sam  Williams et al → Da-Tone Rock Products, Inc.; 2012-01-23 to 2014-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Casey  McLennan → Da-Tone Rock Products, Inc.; 2014-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Casey  McLennan → Da-Tone Rock Products, Inc.; 2014-08-01 to current/open; source msha-controller-operator-history