# Relationship history for MSHA mine 4201935

Current hierarchy: **CCI  (Clyde Companies Inc) → Geneva Rock Products Inc → Perry Pit**

- 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:** CCI  (Clyde Companies Inc) → Perry Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Call Gravel Company → Perry Pit; 1985-04-01 to 1986-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Call → Perry Pit; 1985-04-01 to 1986-04-29; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Call → Call Gravel Company; 1985-04-01 to 1986-04-29; source msha-controller-operator-history
- **operator_operates_mine:** United Sand & Gravel Inc → Perry Pit; 1986-04-30 to 1999-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Howard H  Giles et al → Perry Pit; 1986-04-30 to 1999-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Howard H  Giles et al → United Sand & Gravel Inc; 1986-04-30 to 1999-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Geneva Rock Products Inc → Perry Pit; 1999-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CCI  (Clyde Companies Inc) → Geneva Rock Products Inc; 1999-03-01 to current/open; source msha-controller-operator-history