The fame of Arizona as a copper producing state is so great and widespread that sometimes her deposits of other minerals do not receive their due share of attention. It is not very generally known that within the boundaries of Arizona are some of the largest and richest gold placers in the country. The early prospector discovered these placers and worked the richest spots with his pan and rocker. Considerable sums of money have been spent in attempts to develop certain of the deposits but either through mismanagement or unwise expenditure of the money because of insufficient investigation, few of these ventures have paid. In the exploitation of placer ground the question of an easily available and abundant water supply is important. It is preeminently the great problem in the development of Arizona placers where there is so little rainfall and so few permanent streams. To the man who is able to solve this difficulty with a reasonable expenditure of capital, Arizona gold placers will give up millions of dollars worth of gold.