The El Compas and El Orito veins have the characteristics of a low sulfidation epithermal vein system. They occur in a region characterised by numerous, high silver-grade intermediate sulfidation epithermal vein systems.

At the El Compas concession, northerly trending veins in the Chilitos Formation have finely banded, coliform and crustiform open space fill textures. Bladed quartz after calcite textures are common. Veins in felsic rocks are comprised of saccharoidal to fine-grained quartz, banded veins. Wider veins in felsic rocks are observed in the Cantera pit and at the El Compas shaft. These veins show breccia and bladed quartz-after calcite textures. Calcite is observed in bands in large andesite-hosted quartz veins and in veinlets distal to mineralised zones in very weakly propylitised rocks.

Within the El Compas ramp, the widest calcite veins (>0.75m, both black and white coarse grained calcite) occur as north-west trending veins. Large northerly trending calcite veins have not been observed on surface or in the El Compas ramp; however, thick calciterich quartz veins were intersected by drilling at deeper levels below the mine and elsewhere that appear to correlate with the north-south trending El Compas and other veins. Sulfide abundance in veins rarely exceeds 5%, and is most abundant in the mineralised veins. Pyrite or pyrrhotite are the most common sulfides. Rare sphalerite and exotic copper was observed at the 7th level of the El Compas ramp. Magnetite was identified in panned concentrates from the mineralised veins.

Since publishing the El Compas preliminary economic assessment (“El Compas PEA”), the Company continued to optimize mining methods, the crushing circuit and grinding alternatives and was successful on a number of fronts in improving the operating metrics. The work index of the ore and the size on the motor allowed the capacity of the milling circuit to increase to 325 tpd, which allowed for the mining method to be changed to mechanized cut and fill from captive cut and fill. Mechanized cut and fill increases the mining rate but has the same cost profile as captive cut and fill previously disclosed in the El Compas PEA.

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The treatment of the El Compas mineralization will be performed at the La Plata processing facility located 20km from the mine.

The plant will be modified to produce a single gold-silver concentrate which would be sold to smelters and refiners. The process flowsheet will consist of conventional comminution, gravity and froth flotation. Endeavour Silver will upgrade the existing plant so that it can safely and reliably process 250tpd (200tpd from Endeavour Silver mining and 50tpd from toll mining) of mineralization averaging ± 5 g/t Au and ± 96 g/t Ag.

The projected recoveries of gold and silver based on open-circuit rougher and cleaner flotation tests are 83.5% and 73%, respectively. The cleaner concentrate grade will be 868 g/t Au and 12,095 g/t Ag.

The mineralization will be delivered by truck from the mine in 20 tonne loads. Upon arrival at site, each truckload will be weighed on a platform scale. The mineralization will be dumped directly thro ........