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William A. Bear <br />Page 3 of 4 <br />August 15, 2014 <br />• Half culvert on the east outslope of the office bench, draining to Ditch C -17 <br />• Culvert near the pump house, perpendicular to Culvert D2 <br />• Culvert perpendicular to Culverts J11 and J12, parallel to the Fire Mountain <br />Canal and running under the Gob Pile #3 haul road <br />10. BRL has included design information for newly named Culverts J10 and J11, both draining to <br />Ditch J8. Please submit revised design information for Ditch JS to account for the <br />additional flow generated from Culverts ./10 and J11. <br />11. The design information provided on page Volume XI, App. B -87 indicates that the peak <br />discharge at structures #3 (Culvert J11) and #4 (Culvert J10) is 1.42 cfs. The structure detail <br />output for Culvert J11 is based on 1.91 cfs. Where is the additional 0.5 cfs entering Culvert <br />111, and what /where is the drainage area contributing the additional flow? <br />12. BRL has proposed the installation of a half culvert to convey flow from Culvert J11 to Ditch <br />J8. Please provide design information for the half culvert. <br />13. The reclamation cost estimate provided by BRL indicates that Culvert C22 will be removed. <br />The revision application materials include a revised design for Culvert C22. It would appear <br />that this culvert is being replaced and not removed, and should remain in the reclamation <br />cost estimate. Please revise the reclamation cost estimate to retain costs to remove <br />Culvert C22. <br />14. Please revise the reclamation cost estimate to include removal costs for all of the culverts <br />listed under Item 9, above. <br />15. Please revise the following maps for clarity: <br />a. Map 15 -1: <br />i. There is an extraneous label for Culvert 812 near the thickener tank. <br />ii. Culvert F4 is still shown on this map, but was proposed for removal under TR -87. <br />b. Map 15 -2: The written scale (1""=200") appears to be in error. Measuring known <br />structures on the map indicates that the scale should be 1" =100'. Please verify. <br />c. Map 20: <br />i. The revised map includes a symbol in the legend for "Sediment Control (not <br />permitted) ". For clarity, please revise this label to "Sediment Control <br />(supplemental)" or "Sediment Control (not required) ". <br />ii. Silt fence is shown along the outslope of the rail bed adjacent to Pond F. This silt <br />fence is supplemental, and should be labeled as such. <br />d. Map 21 -1: The revised map includes a symbol in the legend for "Sediment Control (not <br />permitted) ". For clarity, please revise this label to "Sediment Control (supplemental)" <br />or "Sediment Control (not required) ". <br />