# Relationship history for MSHA mine 4604984

Current hierarchy: **Les  Mayhorn; Kennith  Layne → Alma Developing Inc → No 1**

- 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

- **controller_controls_mine:** Wolford Rabon A → No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** L A L Coal Corp → No 1; 1975-12-08 to 1978-09-13; source msha-controller-operator-history
- **controller_controls_operator:** Wolford Rabon A → L A L Coal Corp; 1975-12-08 to 1978-09-13; source msha-controller-operator-history
- **operator_operates_mine:** Macarena Mining Corp → No 1; 1978-09-14 to 1979-03-13; source msha-controller-operator-history
- **controller_controls_mine:** Webb Raymond R → No 1; 1978-09-14 to 1979-03-13; source msha-controller-operator-history
- **controller_controls_operator:** Webb Raymond R → Macarena Mining Corp; 1978-09-14 to 1979-03-13; source msha-controller-operator-history
- **operator_operates_mine:** L A L Coal Company Inc → No 1; 1979-03-14 to 1985-01-16; source msha-controller-operator-history
- **controller_controls_mine:** Hall E William → No 1; 1979-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hall E William → L A L Coal Company Inc; 1979-03-14 to 1985-01-16; source msha-controller-operator-history
- **operator_operates_mine:** Pinco Mining Company → No 1; 1985-01-17 to 1986-03-17; source msha-controller-operator-history
- **controller_controls_mine:** Pinson Edward S Et Al → No 1; 1985-01-17 to 1986-03-17; source msha-controller-operator-history
- **controller_controls_operator:** Pinson Edward S Et Al → Pinco Mining Company; 1985-01-17 to 1986-03-17; source msha-controller-operator-history
- **controller_controls_mine:** Mapes Billy → No 1; 1985-07-29 to 1986-12-21; source msha-controller-operator-history
- **operator_operates_mine:** Little Rose Coal Corp → No 1; 1986-03-18 to 1986-12-21; source msha-controller-operator-history
- **controller_controls_operator:** Mapes Billy → Little Rose Coal Corp; 1986-03-18 to 1986-12-21; source msha-controller-operator-history
- **operator_operates_mine:** Alma Developing Inc → No 1; 1986-12-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kennith  Layne et al → No 1; 1986-12-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kennith  Layne et al → Alma Developing Inc; 1986-12-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Les  Mayhorn et al → Alma Developing Inc; 1986-12-22 to current/open; source msha-controller-operator-history