Pioneer's offices are open Monday - Friday from 9:00am - 5:00pm.  Pioneer observes all Federal holidays, for which the office will be closed.

Get in Touch

3804 S. Lake Ave.,  Caldwell, ID  83605


Phone: (208) 459-3617

FAX: (208) 459-4491


Please don't send mail to the address above - if you need to mail something to the District, please mail it to:

PO Box 426, Caldwell, ID  83606

If you are experiencing an after-hours emergency with one of Pioneer's facilities, you may call 208-250-8481 for emergency response.

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