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Mt. Pleasant, Iowa- Operational since 1972
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Sturgis, Michigan- Operational since 1981
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Tulare, California- Operational since 1982
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Middlebury, Vermont- Operational since 1982
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- Durham, California
Operational since 1982
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- Somerset, Pennsylvania
Operational since 1983
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Princeton, North Carolina- Operational since 1983
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Lititz, Pennsylvania- Operational since 1983
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Cooperstown, New York- Operational since 1985
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- Fontana, California
Operational since 1985
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Cloverdale, Oregon- Operational since 1986
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- Seven Valleys, Pennsylvania
- Operational since 1986
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South Boston, Virginia- Operational since 1993
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Beltsville, Maryland- Operational since 1994
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Canaan, Connecticut- Operational since 1997
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Zebulon, North Carolina- Operational since 1997
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North Franklin, Connecticut- Operational since 1997
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Candor, New York- Operational since 1998
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Godley, Texas- Operational since 1998
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