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inlet control nomograph. To be conservative and to allow for adequate freeboard, WFC usually <br />uses "projecting" conditions. <br />As virtually all culverts have free outfalls, inlet control assumptions can be verified by the "Pipe <br />Flow Charts" in HDS-3. If flow in the culvert has a free surface, entrance control exists and exit <br />velocity can be approximated by using the greater of normal or critical velocity determined by <br />the "Pipe Flow Charts" in HDS-3. <br />Maintenance Haul roads will be inspected on a daily work basis at the NHN Mine. If, upon <br />inspection, it is determined that repairs are needed, appropriate repairs such as, but not limited to, <br />grading, filling of potholes, replacement of the road surfaces, revegetation of side slopes and <br />watering for dust control, will be conducted as necessary. Magnesium Chloride solution may be <br />utilized to control fugitive dust. The solution of Magnesium Chloride will be applied by a <br />commercial company specializing in this product and will be dispensed from a truck with <br />approximate 16 foot spray bars. One-two applications are anticipated per year. <br />Restoration Unless WFC requests retention of haul roads for postmining land use and the <br />DRMS approves such request, immediately after the road is no longer needed for operations, <br />reclamation, or monitoring: <br />a. The road will be closed to vehicular traffic; <br />b. The natural -drainage patterns will be restored; <br />C. All culverts will be removed; <br />d. Roadbeds will be ripped, plowed and scarified; <br />e. Fill slopes will be rounded or reduced and shaped to conform the site to adjacent <br />terrain and to meet natural -drainage restoration standards; <br />f. Cut slopes will be shaped to blend with the natural contours; <br />g. Terraces will be constructed as necessary to prevent excessive erosion and to <br />provide long-term stability in cut -and -fill slopes; <br />h. The regraded area will be reclaimed in accordance with the approved reclamation <br />plan; <br />Unless otherwise authorized by the DRMS, all road -surfacing materials will be <br />removed, hauled or conveyed and disposed under 4.11.4. <br />Section 2.05.3(3) Page 9 Sept. 2015 (TR -11) <br />