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2.05.3 <br />No part of the light use roads are located in the channel of an ephemeral <br />stream where the upstream watershed is over one square mile. The light <br />use roads are not located in any intermittent or perennial streams. <br />Light use roads will be located to minimize downstream flooding. Run-off <br />from the light use roads above the mine workings must flow through <br />significant vegetation before it reaches any stream. The vegetation will filter <br />sediment from the run-off and slow or stop the flow. No empirical <br />demonstration of the effectiveness of the vegetation filter is presented. <br />However, a visual inspection of the area surrounding the light use roads will <br />confirm it is unlikely the light use roads will cause damage to fish, wildlife or <br />other environmental values or cause additional contributions of suspended <br />solids to steamflow or to run-off outside of the permit area. <br />Light use roads will not cross flowing steams, wet areas or ephemeral <br />channels where a culvert would minimize the probability of disturbance of the <br />hydrologic balance. <br />No surfacing will be utilized for the light use roads. The light use roads will <br />be maintained adequate for the intended use of the roads. A light use road <br />damaged by a catastrophic event will be repaired as soon as is practicable <br />after the damage has occurred. <br />The light use roads above the mine workings are shown on Figure 4.2-2. <br />Light use road #1 provides access to a material storage area. Light use road <br /># 1 is approximately 30 -feet long with an average grade of 0%. A 24" <br />diameter culvert will be placed under light use road #1. <br />Light use road #2 provides access to the sediment pond and topsoil stockpile <br />and is approximately 675 -feet long with an average grade of 4%. A 30" <br />culvert will be placed under light use road #2. <br />Light use road #3 provides access to a power meter and is approximately 60 <br />feet long with an average grade of 0%. A 12" culvert will be placed under <br />light use road #3. <br />During November and December 2005, a light use road was constructed <br />along the north branch of Munger Creek to provide access to a drill hole or <br />holes. The light use road was located on ridges or on the most stable <br />PR -02 2.05-16- 10/12 <br />