Zumwalt Hansen & Assoc Inc Return to Central California Businesses Directory Zumwalt Hansen & Assoc Inc Claim Listing Return to Central California Businesses Directory Description Details Address PO Box 1380 City Hanford State California ZIP Code 93232 Phone 559 582-1056 Listing Category Engineers-Civil - Listings Please login to claim this listing. Username*: Email*: Password*: Log in | Lost your password?