Rio Alto Produces a Record 222,255 Ounces of Gold in 2014

VANCOUVER, BRITISH COLUMBIA--(Marketwired - Jan 12, 2015) - Rio Alto Mining Limited ("Rio Alto") (RIO.TO)(RIO.TO)(RIOM) is pleased to announce that its La Arena Gold Mine produced and sold 57,908 ounces of gold during the three months ended December 31, 2014. 222,255 ounces of gold were poured for the twelve months ended December 31, 2014 compared to guidance of 200,000 to 220,000 ounces for the year.

Ore and waste production from the La Arena Gold Mine for the fourth quarter of 2014 was:

Actual

Planned

Difference

Tonnes

Au gpt

Tonnes

Au gpt

Tonnes/Ozs

Au gpt

Ore mined

3,389,691

0.60

2,399,539

0.60

990,152

0.01

Waste mined

3,656,417

3,831,410

(205,993)

Actual

Planned

Difference

Strip ratio

1.08

1.60

(0.52)

Ounces poured

57,908

49,628

8,280

Ore and waste production from the La Arena Gold Mine for 2014 was:

Actual

Planned

Difference

Tonnes

Au gpt

Tonnes

Au gpt

Tonnes/Ozs

Au gpt

Ore mined

15,274,666

0.52

11,576,660

0.62

3,698,006

(0.10)

Waste mined

17,332,139

18,885,439

(1,553,300)

Actual

Planned

Difference

Strip ratio

1.13

1.63

(0.50)

Ounces poured

222,255

208,022

14,233

2015 Production and Cost Guidance

The Company forecasts its La Arena Gold Mine will produce between 210,000 and 220,000 ounces of gold in 2015 at adjusted operating costs as defined by the World Gold Council ("WGC") to be in the range of $570 to $600 per ounce of gold sold. WGC All-in sustaining costs - including selling, general and administrative costs, exploration, and sustaining capital - are forecast to fall within a range of $730 to $765 per ounce and WGC all-in costs within a range of $740 to $775 per ounce for the year.

The 2015 production forecast and operating cost estimates are based on the following assumptions:

  • Combined gold recovery of 83.4 per cent from the run of mine, dump leach operation;

  • Average grade: 0.59 gpt Au;

  • Waste-to-ore ratio of 1.37:1;

  • Diesel of $3.90 per gallon; and

  • Peruvian Sol: United States dollar foreign exchange rate of 2.9:1.

Rio Alto's 2015 cost per ounce projection is based on sales of between 210,000 and 220,000 ounces of gold and the following cost estimates:

$(000's)

Per Ounce

Mining

62,592

Processing & power

14,954

Worker profit participation

8,040

Mine & Lima administration

39,756

Refining costs net of silver revenue

881

Adjusted operating costs

126,223

$570 to $600

Corporate administration

3,549

Reclamation

1,500

Sustaining capital

29,146

All-in sustaining costs

160,418

$730 to $765

Phase II capital

926

Exploration

1,200

Other

500

Total All-in Costs

163,044

$740 to $775

The Company expects these parameters to fluctuate during the year. The 2015 forecast should be treated as full-year average estimates. Quarterly results will vary from these estimates.