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05-2393 (SFD) Hydrology CalcsHYDROLOGY CALCULATIONS FOR CITY OF LA QUINT BUILDING & SAFETY DEPA TRACT 2652 , Lc R 'ROVED - THE ESTA CIA S °NsrRUCrioN DAIP BY PREPARED BY: PETER G. RINGEIS DATED: MAY, 2004 REQ. Vw'r0 BY CON SA ITANT FOR CODE COM 0*4 VE THESE PLANS SUPPO���„OMcwP�,w4 AT BE N RE'41 EW' - g F O�D TO AS N6 PERMIT BAS TME CA, FORK, WECT R S� C710N SS�hµOE WEENDED 70 �Pp�; ,ix vLPNS iS w �OtES ANO AW �poq Y pito ' m, 3 2005 'r TRd STATE SURVEYORS & CIVIL ENGINEERS �o °"°ats�far fp 8 • ql,,_ •'�C NO. 33515 EXP. 3-31-0 CIVIL Allpt. cif 78-120 CALLE ESTADO, SUITE 102, LA QUINTA, CALIFORNIA (760) 564-0271 HJUN 1 7 2005 UI TRI-STATE Land Surveyors & Civil Engineers 78-120 Calle Estado Suite 102 La Quinta, California 92253 (760) 564.0271 FAX (760) 564-0279 JOB LOT 4 2— TRAcr NO. 26 52-4 SHEET NO. — OF P CALCULATED By -PIDATE 4- a WN - CHECKED BY DATE Rr.Af F P1=1 CS"v Swsj 206.1 (Pmwj . ..........5TuD'.".y ..... .............. .............. ............. . ............. ....... ...... ............. ............. ............................ ........... ........... . ............ .... ..... ... LD r 2.4 7ZA-'j 7,7H..0 . ....... 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I .. ........... .. ..... ............... ............. ............. .. . . . ............. . .......... ........ ... ............................. .............. ............. ............. .. .............. ... ...... .. ..... ... P1=1 CS"v Swsj 206.1 (Pmwj LOT 4z- T1ZA cr NG, 26524 TRI-STATE. 5 -Nm.. 2. L-A Q U I ki TA Land Surveyors& Civil Engineers 4-30- 04 h;QIf.1C�CI5• 4 Ark, c a I v -TI p 5TiZc cr O, 0 (o Ac 3P-O.OICV (LLE S++T. 3 A B C D 1 RCFCD SYNTHETIC UNIT HYDROGRAPH 2 DATA INPUT SHEET 3 4 WORKSHEET PREPARED BY: P. RINGEIS 5 6 PROJECT NAME LOT 42, THE ESTACIAS 7 JOB NO. 8 9 CONCENTRATION POINT DESIGNATION 1 10 AREA DESIGNATION FRONT YARD. AND STREET 11 12 TRIBUTARY AREAS ACRES 13 14 ICOMMERCIAL 15 PAVING/HARDSCAPE 0.06 16 SF - 1 ACRE 17 SF - 1/2 ACRE 0.31 18 SF - 1/4 ACRE 19 IMF - CONDOMINIUMS 20 MF -APARTMENTS 21 MOBILE HOME PARK 22 LANDSCAPING 23 RETENTION BASIN 24 GOLF COURSE 25 MOUNTAINOUS 26 LOW LOSS RATE (PERCENT) 90% 27 28 LENGTH OF WATERCOURSE (L) 60 29 LENGTH TO POINT OPPOSITE CENTROID (Lca) 30 30 31 ELEVATION OF HEADWATER 44.46 32 ELEVATION OF CONCENTRATION POINT 43.5 33 34 AVERAGE MANN INGS'N' VALUE 0.015 35 36 STORM FREQUENCY (YEAR) 100 37 38 POINT RAIN 39 3 -HOUR 2 40 6 -HOUR 2.5 41 24-HOUR 4.5 42 43 BASIN CHARACTERISTICS: ELEVATION AREA 44 43.50r 2796 45 42.75 1234 46 47 48 49 50 51 52 PERCOLATION RATE (in/hr) 1 53 54 DRYWELL DATA 55 INUMBER USED 56 1PERCOLATION RATE cfs 0 5 wr. 4 RCFCD SYNTHETIC UNIT HYDROGRAPH METHOD PROJECT: BASIC DATA CALCULATION FORM JOB NO. SHORTCUT METHOD BY LOT42, THE ESTACIAS 0 P. RINGEIS DATE 4/29/04 DURATION 3 -HOUR PHYSICAL DATA 24-HOUR EFFECTIVE RAIN (in) 0.87 1 CONCENTRATION POINT 0.76 FLOOD VOLUME (cu -ft) (acre -ft) 1 1,064 0.02 2 AREA DESIGNATION REQUIRED STORAGE (cu -ft) (acre -ft) FRONT YARD AND STREET 549 0.01 3 AREA - ACRES PEAK FLOW (cfs) 0.58 0.370 0.10 4 L -FEET 60 5 L -MILES 0.011 6 La -FEET 30.00 La -MILES 0.006 8 ELEVATION OF HEADWATER 44.46 9 ELEVATION OF CONCENTRATION POINT 43.5 10 H -FEET 0.96 It 1 S-FEET/MILE 84.5 12 S"0.5 9.19 13 L-LCAiS^0.5 0.000 [141 AVERAGE MANNINGS'N' 0.015 [151 LAG TIME -HOURS 0.00 1161 LAG TIME -MINUTES 0.2 1171100% OF LAG•MINUTES 0.2 (181200% OF LAG -MINUTES 0.5 It 9 UNIT TIME -MINUTES 100%-200% OF LAG 5 (24) TOTAL PERCOLATION RATE (cfs) 0.06 RAINFALL DATA [1] SOURCE [2] FREQUENCY -YEARS 100 (3) DURATION: 3 -HOURS 6 -HOURS 24 -HOURS [4) [5] POINT AREA RAIN INCHES Plate E-5.2 [6) [7) AVERAGE POINT RAIN INCHES (8) POINT RAIN INCHES Plate E-5.4 191 [10] AREA [11] AVERAGE POINT RAIN INCHES [12] POINT RAIN INCHES Plate E-5.6 [t31 [141 AREA [151 AVERAGE POINT RAIN INCHES 2.00 0.370 1.00 2.00 2.50 0.370 1.00 2.50 4.50 0.370 1.00 4.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1 0.00 0.00 0.00 0.00 SUM [5] 1 0.37 SUM [7) 2.00 It 6] AREA ADJ FACTOR 1.000 ,It 7] ADJ AVG POINT RAIN 2.00 SUM [9) 0.37 SUM (11) 2.50 SUM (13] 0. 371 SUM [15] 4.50 1.000 4.50 1.000 2.50 STORM EVENT SUMMARY DURATION 3 -HOUR 6 -HOUR 24-HOUR EFFECTIVE RAIN (in) 0.87 0.79 0.76 FLOOD VOLUME (cu -ft) (acre -ft) 1,162 0.03 1,064 0.02 1,015 0.02 REQUIRED STORAGE (cu -ft) (acre -ft) 74 .70 2 549 0.01 55 0.00 PEAK FLOW (cfs) 0.58 0.47 0.10 MAXIMUM WSEL (ft) Plate E-2.1 Page 1 of 1 m 5F4T.,5 A B C D 1 RCFCD SYNTHETIC UNIT HYDROGRAPH 2 DATA INPUT SHEET 3 4 WORKSHEET PREPARED BY: P. RINGEIS 5 6 PROJECT NAME LOT 42, THE ESTACIAS 7 JOB NO. 8 9 CONCENTRATION POINT DESIGNATION 1 10 AREA DESIGNATION REAR YARD 11 12 TRIBUTARY AREAS ACRES 13 14 COMMERCIAL 15 PAVING/HARDSCAPE 16 SF - 1 ACRE 17 SF - 1/2 ACRE 0.36 18 SF - 1/4 ACRE oe 19 MF - CONDOMINIUMS 20 MF - APARTMENTS 21 MOBILE HOME PARK 22 LANDSCAPING 23 RETENTION BASIN 24 GOLF COURSE 25 MOUNTAINOUS 26 LOW LOSS RATE (PERCENT) 90% 27 28 LENGTH OF WATERCOURSE (L) 110 29 LENGTH TO POINT OPPOSITE CENTROID (Lca) 55 30 31 ELEVATION OF HEADWATER 44.46 32 ELEVATION OF CONCENTRATION POINT 43.5 33 34 AVERAGE MANNINGS 'N' VALUE 0.015 35 36 STORM FREQUENCY (YEAR) 100 37 38 POINT RAIN 39 3 -HOUR 2 40 6 -HOUR 2.5 41 24-HOUR 4.5 42 43 BASIN CHARACTERISTICS: ELEVATION AREA 44 43.5 2053 45 42.75 890 46 47 48 49 50 51 52 PERCOLATION RATE (in/hr) 1 53 54 DRYWELL DATA 55 NUMBER USED 56 PERCOLATION RATE cfs 0 5 NT- 6 RCFCD SYNTHETIC UNIT HYDROGRAPH METHOD PROJECT: BASIC DATA CALCULATION FORM JOB NO. SHORTCUT METHOD BY LOT42, THE ESTACIAS 0 P. RINGEIS DATE 4/29/04 DURATION 3 -HOUR PHYSICAL DATA 24-HOUR EFFECTIVE RAIN (in) 0.75 [11 CONCENTRATION POINT 0.54 FLOOD VOLUME (cu -ft) (acre -ft) 1 879 0.02 2 AREA DESIGNATION REQUIRED STORAGE (cu -ft) (acre -ft) --§69.481 0.62 REAR YARD 38 0.00 3 AREA - ACRES 0.53 0.43 0.360 MAXIMUM WSEL (ft) 4 L -FEET 110 5 L -MILES 0.021 [61 La -FEET 55.00 7 La -MILES 0.010 8 ELEVATION OF HEADWATER 44.46 9 ELEVATION OF CONCENTRATION POINT 43.5 10 H -FEET 0.96 t t S-FEET/MILE 46.1 1121 S^0.5 6.79 13 L'LCA/S^0.5 0.000 [141 AVERAGE MANNINGS'N' 0.015 (151 LAG TIME -HOURS 0.01 1161 LAG TIME -MINUTES 0.4 1171100% OF LAG -MINUTES 0.4 1181200% OF LAG -MINUTES 0.8 [191 UNIT TIME -MINUTES 100%-200% OF LAG 5 (24] TOTAL PERCOLATION RATE (cfs) 0.05 RAINFALL DATA (11 SOURCE (2) FREQUENCY -YEARS 100 (31 DURATION: 3 -HOURS 6 -HOURS 24 -HOURS [4) [5) [6) (7) POINT AREA AVERAGE RAIN POINT INCHES RAIN Plate E-5.2 INCHES (8) POINT RAIN INCHES Plate E-5.4 (9) [101 AREA [111 AVERAGE POINT RAIN INCHES (121 [131 POINT AREA RAIN INCHES Plate E-5.6 [14] (151 AVERAGE POINT RAIN INCHES 2.00 0.360 1.00 2.00 2.50 0.360 1.00 2.50 4.50 0.360 1.00 4.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 SUM (5) 1 0.36 SUM (7] 2.00 (16] AREA ADJ FACTOR 1.000 171 ADJ AVG POINT RAIN 2.00 SUM [9] 1 0.36 SUM [11] 2.50 SUM [13] 0.36 SUM (151 4.50 1.000 1.000 2.50 4.50 STORM EVENT SUMMARY DURATION 3 -HOUR 6 -HOUR 24-HOUR EFFECTIVE RAIN (in) 0.75 0.67 0.54 FLOOD VOLUME (cu -ft) (acre -ft) 980 0.02 879 0.02 704 0.02 REQUIRED STORAGE (cu -ft) (acre -ft) --§69.481 0.62 0.01 38 0.00 PEAK FLOW (cfs) 0.53 0.43 0.07 MAXIMUM WSEL (ft) Plate E-2.1 Page 1 of 1