Environmental Impact Statement for the Red Mountain Underground Gold Project

VANCOUVER, BRITISH COLUMBIA--(Marketwired - Aug. 16, 2017) - IDM Mining Ltd. (TSX VENTURE:IDM)(OTCQB:IDMMF) ("IDM" or the "Company") is pleased to announce that it has formally received complete comments on the Red Mountain Underground Project (the "Project") Project Application and Environmental Impact Statement (the "Application/EIS") from the BC Environmental Assessment Office ("BC EAO") and Canadian Environmental Assessment Agency ("CEAA"). These comments represent the outcome of an initial 30 day screening review of the Application/EIS by provincial and federal agencies and First Nations. IDM is working through these comments and incorporating necessary edits to the Application/EIS to ensure concordance with the Application Information Requirements and EIS guidelines for the Project. This work will be completed in the coming days and the Application/EIS will be submitted in revised form to the BC EAO and CEAA shortly.

The Company appreciates the thorough and timely work of the BC EAO, CEAA and Nisga'a Nation representatives in reviewing the Application/ EIS.

ABOUT IDM MINING LTD.

IDM Mining Ltd. is a mineral exploration and development company based in Vancouver, BC, Canada. The Company's current exploration and development activities are focused on precious metals in British Columbia, with a primary focus on the high grade underground Red Mountain Underground Gold Project which has entered the BC and Canadian environmental assessment processes. Further information can be found on the Company's website at www.IDMmining.com and on the Project's website at RedMountainProject.com.

ON BEHALF OF THE BOARD
of IDM Mining Ltd.

"Robert McLeod"
President, CEO and Director

"Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release."

Forward-Looking Statements: Some statements in this news release contain forward-looking information or forward-looking statements for the purposes of applicable securities laws. These statements include, among others, statements with respect to the proposed exploration and development activities and their timing, resource estimates and potential mineralization. These statements address future events and conditions and, as such, involve known and unknown risks, uncertainties and other factors, which may cause the actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the statements. Such factors include, among others and in addition to those described elsewhere in this release, timing and success of future exploration and development activities, exploration and development risks, delays in obtaining or inability to obtain required government or other regulatory approvals, permits or financing, the risk of unexpected variations in mineral resources, grade or recovery rates, of failure of plant, equipment or processes to operate as anticipated, of accidents, labor disputes, and unanticipated delays in completing other development activities, the risk that estimated costs will be higher than anticipated and the risk that the proposed mine plan and recoveries will not be achieved, equipment breakdowns and bad weather, the timing and success of future exploration and development activities, exploration and development risks, mineral resources are not as estimated, title matters, third party consents, operating hazards, metal prices, political and economic factors, competitive factors and general economic conditions. In making the forward-looking statements, the Company has applied several material assumptions including, but not limited to, the assumptions that: required regulatory approval, permits and financing will be obtained; the proposed exploration and development will proceed as planned; with respect to mineral resource estimates, the key assumptions and parameters on which such estimates are based; that the proposed mine plan and recoveries will be achieved, that capital costs and sustaining costs will be as estimated, and that no unforeseen accident, fire, ground instability, flooding, labor disruption, equipment failure, metallurgical, environmental or other events that could delay or increase the cost of development will occur, and market fundamentals will result in sustained metals and minerals prices. The Company expressly disclaims any intention or obligation to update or revise any forward-looking statements whether as a result of new information, future events or otherwise except as otherwise required by applicable securities legislation.