Deposit Types
At Chandalar, both lode and placer gold exist within the district. The placer deposit is the focus of this report, but a significant exploration potential exists to find and develop the lode deposits that were the source of the placer deposit.

Lode Deposits
Lode gold occurs throughout the Chandalar property in definable systems of veins, veinlets, disseminations, and auriferous lenses of quartz within or adjacent to northwest-trending shear zones.

The schist-hosted Mikado mineralization occurs in discontinuous elongate lenses and veins that pinch and swell as border zones of stockwork and sheeted veinlets. The Mikado shear zone, generally found in the hanging wall, contains the majority of the mineralization. Recurrent movement along the shear explains the discontinuous nature of the mineralization, the pulverization of quartz to a clayey sugary texture, and the numerous ragged inclusions of host rock.

Elsewhere, veins such as the Little Squaw, Crystal, Kiska, Prospector, and Grubstake are hosted in splay faults and are more competent and continuous and mineralization primarily occurs as pods and ore shoots. Overall, auriferous and subparallel quartz veins of the Chandalar district occur across a five-mile width and a northwest-trending four-mile strike length.

Placer Deposits
Placer gold in the Chandalar Mining district was liberated from lode sources of the former highland weathering surface that rose ........

Conventional open pit mining methods using drill, blast, load, and haul mining are applicable to the Chandalar Mine because the gravel is frozen (permafrost).

The pit shell was segregated into six separate pits or pit pushbacks designated as Lower Pit A, Lower Pit B, Lower Pit C, Upper Pit A, Upper Pit B, and Upper Pit C. Each pit was designed with haul roads.

A preliminary mining schedule was generated from the base case pit resource estimate:

• Process Material Production Rate: 4,000 bcy per day (ypd) for the first year (with one wash plant) and 8,000 bcy per day for subsequent years (with two wash plants)
• Mine Operating Days per Week: 7
• Mine Operating Period per Year: All of first three quarters (January 1 through October 31), with processing of mined material occurring only between May 17 and September 13 (120 days).
• Mine Operating Shifts per Day: 2
• Mine Operating Hours per Shift: 12

Additional design work and phasing of the pits/pushbacks will likely better balance the annual process and waste stripping and metal production. Likewise, adding more blasting and waste stripping days to the seasonal schedule will help smooth out the production schedule.

High-grade material stockpiled during the first- and second-year ramp ups to full production and lowgrade stockpiled material was scheduled to be processed after completion of regularly scheduled highgrade material processing.

For s ........

Prior to 2013, the historical recovery methods at Chandalar Mine have used gravity systems consisting of a rotating trommel and sluice arrangement. A wash plant using the newer shaker deck system was used at Chandalar Mine for the 2013 through 2018 production seasons.

Process Plant Description
Dr. Harvey has extensive experience with placer recovery equipment and as a result has selected a stateof-the-art system for the Chandalar Mine project. Further, the rehandling of materials and haulage are two of the major expenses associated with placer mining, and a proper design can significantly reduce these costs. As a result of this, Dr. Harvey has recommended the use of two mobile wash plant shaker systems combined with a feed hopper with a side dumping grizzly, a belt feeder, and plant feed conveyor. The plant consists of a feed receiver with water sprays, a vibrating screen deck, and a double sluice box.

The coarse tailings are transported via a series of por ........