An OAH employee will contact you to schedule an appointment. If you need to cancel your appointment, please call OAH at 360-407-2700 or 1-800-583-8271. To submit documents electronically to OAH, you will need to access the Participant Portal. Office Location Olympia Spokane Valley Tacoma Reason for Visit Contact Details Name First Last Email Phone Number Docket Number Submit Leave this field blank