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Home My WebLink AboutCT 04-26; Robertson Ranch PA 16, 17, 18; SEWER STUDY; 2008-01-17TABLE OF CONTENTS SECTION 1 INTRODUCTION Purpose of Study SECTION 2 1. Vicinity Map 2. Flowrate Generation Criteria, City of Carlsbad, Engineering Standards, Edition 2004 SECTION 3 Explanation of Formulas Used Calculations of Qavg and Qpeak Summary Table of Calculations SECTION 4 Exhibit A - Sewer Analysis Exhibit INTRODUCTION Purpose of Study This sewer analysis was prepared to determine the proposed flow depth and velocities from planning areas 16, 17 and 18. CITY OF OCEANSIDE HIGHWAY.^5 SITE CITY OF VISTAerr wo? CITY OF SAN MARCOS CITY OF ENCINITAS VICINITY MAP NO SCALE EXPLANATION OF FORMULAS 1. EDU Determined per the City of Carlsbad Engineering Standards, Edition 2004 to be 1 EDU per Single Family Residence. 2. Average Daily Flow (ADF) Determined to be 220 gal/day/EDU per the City of Carlsbad Engineering Standards, Edition 2004. 3. Average Flow (Qavg) EDU x ADF (Then convert to cfs) 4. Peak Factor Determined to be 2.5 per the City of Carlsbad Engineering Standards, Edition 2004. 5. Peak Flow (Qpeak) 2.5 x Qavg 6. Calculations for Velocity & Depth of Flow Using CivilCad 1/17/2008 Page 1 of 1 Pipe Reach 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 A.H. #'S 1 1 to 27 27 to 26 26 to 25 25 to 24 24 to 23 23 to 22 8 to 22 22 to 19 4 to 19 21 to 20 20 to 19 19 to 18 18to7B 12Bto11B 11BtOlOB 10Bto9B 9B to 8B 8B to 7B 7B to 6B 6B to 7B Lots 43-47 & 60-64 40-42 & 65-67 35-39, 68 & 69 70-72, 151 152-156, 193, 194 157-158, 190-192 1 60-1 63 & 186-1 89 N/A 117,118,1396,140 109-1 12 & 145-150 113-116& 141-144 N/A N/A 226-228 & 262-264 N/A Rec. Center (PA1 9) 104-108 & 12 units (PA21) 100-103 & 12 units (PA21) 95-99 & 12 units (PA21) 89-94 ^ Total EDU's 10 16 23 27 34 40 8 48 4 10 18 70 70 6 6 7 24 40 127 133 Qavg (cfe) 0.003 0.005 0.008 0.009 0.012 0.014 0.003 0.016 0.001 0.003 0.006 0.024 0.024 0.002 0.002 0.002 0.008 0.014 0.043 0.045 Qpeak (cfs) 0.009 0.014 0.020 0.023 0.029 0.034 0.007 0.041 0.003 0.009 0.015 0.060 0.060 0.005 0.005 0.006 0.020 0.034 0.108 0.113 Pipe Diam. (in.) 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 Pipe Slope (%) 1.00 1.00 1.01 4.74 0.90 1.07 4.25 3.83 4.23 1.00 0.50 2.22 2.20 0.50 0.50 0.50 0.92 0.92 L 1.02 0.72 Depth of flow (ft) (n=0.01l) 0.038 0.046 0.056 0.041 0.068 0.070 0.024 0.056 0.017 0.038 0.036 0.077 0.077 0.034 0.034 0.036, 0.056 0.072 0.124 0.138 Percent Full L Jn=0.011) 5.70 6.90 8.40 6.15 10.20 10.50 8.60 8.40 2.55 5.70 11.00 11.55 11.55 5.10 5.10 5.40 8.40 10.80 18.60 20.70 Pipe Velocity (fps) (n=0.011) 1.15 1.33 1.44 2.63 1.56 1.74 1.7 2.9 1.23 1.15 0.81 2.69 2.66 0.74 0.74 0.81 1.44 1.66 2.42 2.18 G:\011014\SEWER STUDYXRobertson Ranch PA 16-18_SewerAnalysis.xls