Diversion of the headwaters of the Yukon River through the Coast Range into the Taiya River valley would make available about one million horsepower of electric energy. The only foreseeable use for any substantial block of this power is by electrochemical and electrometallurgical industries. This report discusses the raw materials needed by such industries and possible Alaskan sources of some of the materials. The industries considered as potential consumers of Yukon-Taiya power, in decreasing order as potential power claimants, are as follows: Nonferrous metals (including aluminum, magnesium, copper, zinc, and nickel), ferroalloys (including ferrosilicon, ferrochromium, ferromanganese, and ferrotungsten), calcium carbide, artificial abrasives, nitrogen compounds, chlorine and caustic soda, iron and steel, carbon and graphitized products, and phosphorus and phosphorus compounds. 1 Some of the ores and other raw materials required for s•uch industries might be obtained in Alaska. The bulk of the materials, however, for large operations must be imported.. The usual aluminum um ores are not known and not likely to be found in Alaska. Possible AlasKa.n sources of magnesium are sea water, dolomite, and olivine, although there are no data on the magnesium content of Alaskan sea water or dolomite. Unlimited resources of highmagnesium• olivine are available whenever magnesium production from olivine becomes economically feasible. The known copper resources of Alaska are limited and most of the reserves are in marginal or submarginal deposits potentially of interest also for their iron or nickel content. Copper mineralization, however, is widespread and copper production from Alaska has been second only to gold. Known Alaskan zinc resources are small although occurrences are widespread and numerous. 'Because there are no zinc smelters on the Pacific coast, interest in development of Alaskan zinc deposits has been minor. Alaskan•