# Relationship history for MSHA mine 1516773

Current hierarchy: **Capps David → W G S Coal 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

- **controller_controls_mine:** Great Western Resources Inc → No 1 Mine; 1987-02-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** New Horizons Coal Inc → No 1 Mine; 1989-11-01 to 1993-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Great Western Resources Inc → New Horizons Coal Inc; 1989-11-01 to 1993-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Sturgill Leonard → No 1 Mine; 1992-12-18 to 1994-08-01; source msha-controller-operator-history
- **operator_operates_mine:** Sky Coal Company Inc → No 1 Mine; 1993-09-01 to 1993-10-06; source msha-controller-operator-history
- **controller_controls_operator:** Sturgill Leonard → Sky Coal Company Inc; 1993-09-01 to 1993-10-06; source msha-controller-operator-history
- **operator_operates_mine:** W G S Coal Company Inc → No 1 Mine; 1993-10-07 to 1994-04-05; source msha-controller-operator-history
- **controller_controls_mine:** Wilder Lewis L & James Givens → No 1 Mine; 1993-10-07 to 1994-04-05; source msha-controller-operator-history
- **controller_controls_operator:** Wilder Lewis L & James Givens → W G S Coal Company Inc; 1993-10-07 to 1994-04-05; source msha-controller-operator-history
- **operator_operates_mine:** W G S Coal Inc → No 1 Mine; 1994-04-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Capps David Et Al → No 1 Mine; 1994-04-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Capps David Et Al → W G S Coal Inc; 1994-04-06 to current/open; source msha-controller-operator-history