# Relationship history for MSHA mine 4405153

Current hierarchy: **James Wayne  Estep → Sandy Lane Inc → No 1 Mine**

- 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:** Hay Coal Company Inc → No 1 Mine; 1979-04-01 to 1980-03-13; source msha-controller-operator-history
- **controller_controls_mine:** Hay James E Jr → No 1 Mine; 1979-04-01 to 1980-03-13; source msha-controller-operator-history
- **controller_controls_operator:** Hay James E Jr → Hay Coal Company Inc; 1979-04-01 to 1980-03-13; source msha-controller-operator-history
- **operator_operates_mine:** Sandy Lane Inc → No 1 Mine; 1980-03-14 to 1981-01-27; source msha-controller-operator-history
- **controller_controls_mine:** Coleman Gilbert A → No 1 Mine; 1980-03-14 to 1981-01-27; source msha-controller-operator-history
- **controller_controls_operator:** Coleman Gilbert A → Sandy Lane Inc; 1980-03-14 to 1981-01-27; source msha-controller-operator-history
- **operator_operates_mine:** Sandy Lane Inc → No 1 Mine; 1981-01-28 to 1985-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Deel Paul R → No 1 Mine; 1981-01-28 to 1985-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Deel Paul R → Sandy Lane Inc; 1981-01-28 to 1985-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Sandy Lane Inc → No 1 Mine; 1985-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James Wayne  Estep → No 1 Mine; 1985-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James Wayne  Estep → Sandy Lane Inc; 1985-11-01 to current/open; source msha-controller-operator-history