Laserfiche WebLink
Final Drainage Report, May 29, 2015 <br />Canyon Dolomite Old Quarry Project <br />The Proposed Project will not affect existing offsite drainage flow patterns, and vice versa. <br />III. DRAINAGE DESIGN CRITERIA <br />A. Regulations and Criteria <br />The Division of Reclamation, Mining, and Safety (DRMS) does not have defined drainage <br />design criteria. This drainage report has been prepared in accordance with good <br />engineering practices and the references provided. <br />B. Selection of BMPs <br />The major Best Management Practice (BMP) under consideration for this Project is a rock <br />chute. <br />C. Hydrological Criteria <br />The rainfall data presented in the NOAA Atlas 14, Volume 8, Version 2 was used. The <br />Rational Method was used to calculate runoff. The Site was evaluated for the 10 -year and <br />100 year rainfall events. Site soils are Hydrologic Group D based on soil survey data and <br />site observations. <br />D. Hydraulic Criteria <br />The rock chute was designed using the methods presented in a series of papers by KM. <br />Robinson and others. See the References section. The channel leading to the rock chute <br />was designed using the Manning Equation. See attached calculations. <br />IV. DRAINAGE DESIGN <br />A. Design Elements <br />The site design consists of the rock chute and its approach channel. <br />B. Offsite Runoff Considerations <br />The Project is designed to safely pass the offsite runoff from the upstream basin. The <br />Canyon Dolomite -Drainage Report May2015-mv0 doc Page 2 <br />