HYDRO25803

• Permit No: M1978091UG
• IBM Index Class Name: Hydrology
• Doc Date: 4/26/2007
• Doc Name: Stormwater Managment Plan
• From: Gault Group Inc.
• To: Water Quality Control Division
• Media Type: D
• Archive: No

Golden Wonder Mine
DRMS Mine Permit No M-1978-091
Storm Water Management Plan
accept stormwater originating from the work area, revegetation of perimeter berm areas
with the use of stockpiled soil from initial mine operations, berms alongside the portion
of Deadman's Gulch adjacent to the pad to confine gulch flows to the.gulch itself and
prevent pad stormwater from reaching the gulch, and run-on channels at the toe of the cut
slope to route up-slope flows from entering the pad itself. The combination of these
features has appeared to be effective in controlling stormwater within the Leve16 pad.
However, in the interest of being conservative, any stormwater flows that may encounter
the waste rock may also create acid rock drainage. This is a `potential' or perceived
concern that has not yet actually occurred. Therefore as part of this plan, we will
conduct monitoring in the forthcoming year to verify whether any acid rock drainage (in
the form of seeps or communication with Deadman Gulch) during the spring-melt season.
If no hydrologic connectivity of the waste rock ARD is measured, then no further
management practices are required. However if any ARD pathway is observed during
monitoring, then we may add an additional stormwater feature of a `waste rock toe
channel comprised of mixed grade dolomite limestone'. This channel will serve several
goals towards stormwater and ARD controls as follows;
• The `mixed grade' of materials will include size fractions from gravel to cobble
which will effectively baffle stormwater energy causing particulate matter to drop out
of solution
• The dolomite limestone contains carbonate rich minerals that react with low pH
waters that tend to have dissolved divalent metals in solution. These divalent metals
readily react with the carbonate to form precipitates that settle through gravity or
adsorption to the dolomite materials. Given the low rate of stormwater flows, the
intended waste rock toe channel design is anticipated to suffice for its intended use in
perpetuity
a. SWMP Administrator
Representatives of Gault Group Inc. have been designated by the mine owner
(LKA International Inc.) as being responsible for any and all environmental issues
related to the mine inclusive of stormwater and its associated permitting. The
point of contact for GGI in regards to mine site S WMP is: Karmen
King/GGI/Aquatic Toxicologist: phone: [phone].
b. Identification of Potential Pollutant Sources and Best Management Practices
A discussion of the potential pollutants associated with mine are described by
Level as follows;
Level 3 is currently inactive and does not contain any residual mine activity
materials with the exception of historic ore carts, railing and metal debris. Atl