This report represents preliminary cost estimates on selected methods for the recovery of uranium and vanadium from carbonate leach solutions utilizing a mercury cathode cell. The conditions considered in this report are not necessarily the optimum but serve as a basis of compariosn. Operating costs for all of the processes considered are favorable in comparison to the method of acidifying the arbonate solution to recover the uranium and vanadium. The range of operating costs, plus plant amortization, reported are from $1.23 PTS to $4.79 PTS. The operating costs presented exclude labor and maintenance. Capital costs reported arerelatively high for the various processes, being in the range of from $1,700 to $5,500/ton solution/day, but these may be substantially reduced at a slight increase in operating costs.