The Ed North (North Ridge) occurrence is located at an elevation of approximately 1100 metres on a northwest-trending ridge separating the east arm of Lead Creek and the South Salmo River.

Regionally, the area is underlain by fine clastic sediments of the Ordovician Active Formation, sediments and carbonate rocks of the Middle Cambrian Nelway Formation, undivided sedimentary rocks of the Cambrian Laib Formation and quartz arenite sedimentary rocks of the Neoproterozoic to Lower Cambrian Hamill Group. To the north these have been intruded by granodioritic rocks of the Cretaceous Anstey pluton and small stocks of syenitic to monzonitic intrusive rocks of the Eocene Coryell Plutonic Suite.

Locally, blast pits and side caving along a 4-metre high bluff have exposed a mineralized breccia zone in fractured cherty dolomite or recrystallized and dolomitized limestone of the Nelway Formation. Clasts average 2 to 3 centimetres in size with a matrix of calcite or quartz-calcite hosting massive to semi-massive cementing sphalerite with erratic coarse-grained, globular or rimming galena. Mineralization has been identified over an area of approximately 180 to 210 metres east-west and 150 metres north-south.

Also, west of the previous zone, stratiform sphalerite mineralization occurs over a width of at least 1 metre and is traceable along strike for several metres.

In 1990, two chip samples (LR-14 and LR-16) of mineralized breccia from former pits yielded 3.99 and 9.2 per cent zinc with 2.73 and 0.02 per cent lead over 1.0 and 1.2 metres, respectively, whereas a grab sample (LR-19) of stratiform sphalerite assayed 0.30 per cent zinc (Assessment Report 20376).

In 1991, a chip sample (5968) of mineralized breccia from a pit assayed 0.33 per cent lead and 4.74 per cent zinc over 1.0 metre (Assessment Report 21705).

The area has been explored in conjunction with the main Ed (MINFILE 082FSW003) occurrence since 1952, when a rough road to the ‘old prospects’ was developed and a program of bulldozer stripping was undertaken.

In 1990, Worthington Resources prospected and soil sampled the area as the Libby 1 claim. In 1991, Timmax Resources Corp. completed a program of rock, silt and soil sampling; geological mapping and minor trenching. In 1993, Consolidated Ram Rod Gold Corp. completed a 12.8 line-kilometre induced polarization survey on the area.

In 2012, a program of prospecting and geological mapping was completed. In 2019, Guinet Management Inc. completed a program of geological mapping.