The KSM Project comprises four discrete claim blocks. The claim blocks are referred to as:
- the KSM claims
- the Seabee claims
- the Tina claims
- the Treaty Creek Switching Station claims
These four claim blocks include 79 mineral claims (cell and legacy) and 2 mining leases with a combined area of 40,784.97 ha and 100% owned by KSM Mining ULC, a wholly owned subsidiary of Seabridge Gold Inc. The original KSM claim group consisted of two contiguous claim blocks known as the Kerr and Sulphurets (or Sulphside) properties. Most of the lands covered by these claims are now contained within mining leases. There are also 17 KSM placer claims held by KSM Mining ULC overlaying part of the KSM mining leases. The placer claims secure rights in a historically designated placer district.
Property holdings were expanded around the original KSM claims through staking and purchase of several claim groups. These groups include the Seabee group, acquired by staking, the Tina and BJ groups purchased in 2009, the New BJ group purchased in 2011, and the Treaty Creek Switching Station claims purchased in 2018. The Seabee, Tina, and Treaty Creek Switching Station claims were acquired to secure infrastructure locations for the project.
The KSM Properties are in northwest BC at an approximate latitude of 56.50 N and a longitude of 130.30 W. Located about 950 km northwest of Vancouver, 65 km north-northwest of Stewart, and 21 km south-southeast of the Eskay Creek Mine (production ceased in 2009), this area has been the site of mining and exploration for decades.
KSM is in the rugged Coastal Mountains of northwestern BC, with elevations ranging from 520m to over 2,300m. The climate is temperate, typical of the northern coastal rainforest, with sub-arctic conditions at high elevations. Precipitation is high with annual totals in the range of 801 mm to 1,295 mm of rain and 572 cm to 1,098 cm of snow. The length of the snow-free season varies from about May through November at lower elevations and from July through September at higher elevations.