Inquiry (采购产品): cathodic protection PO Box 920, Bowman ND 58623. I have a rancher that wants to protect a large steel stock tank, 30 foot dia. What can you tell me about this type of protection. **** Hidden Message ***** Fred Nass 58623 Company: USDA-NRCS E-mail: fred.nass@nd.usda.gov **** Hidden Message ***** fred.nass@nd.usda.gov