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HomeMy WebLinkAboutPROJECT INFORMATION 2SURFACE WATER DRAINAGE CALCULATIONS PROJECT: Coastal Medical DATE: 12/22/01 Prepared By: Velcon Group, Inc. SCANNEL I PROJECT INFORMATION BY St. Lucie Count A. SITS INFORMATION 1. TOTAL AREA 3.13 AC 2. IMPERVIOUS AREA a. BUILDINGS 0.43 AC b. PARKING AREAS 1.51 AC b. WATER SURFACE 0.00 AC TOTAL IMPERVIOUS AREA 1.94 AC 3. PERVIOUS AREA 1.19 AC 4. AVERAGE AREA OF RET / DET. 0.17 AC B. MINIMUM ELEVATIONS 1. ROADS AND PARKING 16.00 NGVD 2. FLOORS 17.00 NGVD _ C. DISCHARGE 1. The allowable discharge for lots in Port St. Lucie: 2" per acre per day D. WATER LEVEL ELEVATIONS 1 WET SEASON WATER TABLE 12.10 NGVD E. RAINFALL AMOUNTS (24 HOURS) 1. ROADS (10 YEAR) 6.00 INCHES 2. DESIGN (25 YEAR) 7.50 INCHES 3. FLOORS (100 YEAR) 9.00 INCHES II DESIGN CRITERIA A. QUALITY Proposed System dry -detention area 75% of the greater of the first inch of runoff or 2.5 times the percent impervious. B. QUANTITY 1. The site shall provide storage to sustain the 25 year - 3 day storm event. 2. Finished floor elevations shall exceed the 100 year- 3 day storm event. 3. Minimum pavement elevations shall exceed the 10 year - 1 day storm event. ,;2D49u Page 1 of 5 M r. III COMPUTATIONS A. SCS CURVE NUMBER / SOIL STORAGE 1. AVERAGE WATER TABLE 12.10 NGVD 2. AVERAGE SITE GRADE 15.00 NGVD 3. AVERAGE DEPTH TO WATER TABLE 2.90 FEET 4. CUMULATIVE WATER STORAGE 10.90 INCHES COMPACTED WATER STORAGE 8.18 INCHES 5. SOIL STORAGE PRE DEVELOPMENT = S (pre) 10.90 INCHES POST DEVELOPMENT = S (post) 3.11 INCHES 6. SCS CURVE NUMBER = CN 76.3 B. ALLOWABLE DISCHARGE 1. TOTAL AREA 3.13 AC 2. ALLOWABLE RUNOFF 1.50 CFS 3. VOLUME OF RUNOFF 2.975 AC -FT ALLOWABLE DISCHARGE 2.98 C-FT/DAY C. QUALITY / QUANTITY 1. FIRST INCH OF RUNOFF 0.26 AC -FT 2. 2.5 X % IMPERVIOUS 0.36 AC -FT 3. REQ. DRY RETENTION STORAGE (75%) 0.27 AC -FT 4. DETENTION STORAGE PROVIDED 0.35 AC -FT J Page 2 of 5 W U O w Q O M n L6 > LU W C Q N LL Z H y ornnmvvtnm 0 0 0 0 0 0 e- fV 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 O O � N m C N O 06666666 0 0 0 0 0 �,To O O O O O N N m 0 0 0 0 0 0 0 ,-- 0 0 0 0 0 0 0 0 In O O O N O t(7 O M V 6 u7 t0 w n e x 0 r„2 d� O RERAM, a Q p w 0 ul 3 g i pK ix >. W r� fcee�p'li M O *A a N 4 • £. 2.�KPHa; o 0 0 0 0 0$ o 0 0 0 0 0 o 0 0 0 0 0 0 0 m w v cJ o_ ad �OAON-133J 0 a ri o a0vis N O O O O m if O V STORM STAGES AND DISCHARGES A. MINIMUM BUILDING FLOOR ELEVATION 1. RAINFALL AMOUNT 12.23 INCHES (100 YR. :3 DAY) 2. INCHES OF RUNOFF, Q 9.16 INCHES 3. VOLUME OF RUNOFF 2.39 AC -FT 4. ACCEPTABLE MINIMUM FLOOR 16.94 NGVD 5. RECOMMENDED MIN. FLOOR 17.60 NGVD B. MINIMUM PARKING ELEVATION 1. RAINFALL AMOUNT 6.00 INCHES (10 YR.: 1 DAY) 2. INCHES OF RUNOFF, Q 3.41 INCHES 3. VOLUME OF RUNOFF 0.89 AC -FT 4. ACCEPTABLE PARKING ELEV. BASED ON FLOOD ROUTING 15.79 NGVD 5. RECOMMENDED PARKING ELEV. 16.00 NGVD VI PERIMETER BERM ELEVATION A. TOP OF BERM DESIGN 1. RAINFALL AMOUNT 10.1925 INCHES (25 YR. : 3 DAY) 2. INCHES OF RUNOFF, Q 7.22 INCHES 3. VOLUME OF RUNOFF 1.88 AC -FT 4. TOP OF BERM DETERMINED (Zero Discharge) 16.25 NGVD VII WEIR DESIGN A. TOP OF WEIR DESIGN 1. RAINFALLAMOUNT 10.1925 INCHES (25 YR. : 3 DAY) 2. 25 YR. -3 DAY RUNOFF, Q 7.22 INCHES 3. VOLUME OF RUNOFF 1.88 AC -FT 4. LOWEST POINT IN PARKING LOT 16.00 NGVD B. WEIR CREST ELEVATION 1. DET. VOLUME PROVIDED 0.35 AC -FT 2. WEIR CREST ELEV. REQUIRED 15.50 NGVD 3. DESIGN HEAD 0.50 FEET C. WEIR LENGTH REQUIRED 1. ALLOWABLE DISCHARGE 1.500 CFS 2. WEIR LENGTH (Calculated) 1.36 FEET 3. WEIR LENGTH USED 0.5 FEET D. BLEEDER SIZE 1. BLEEDER TYPE CIRCULAR 2. MINIMUM BLEEDER SIZE USED 0.25 FEET 9.20OU 0062 s Page 4 of 5 STAGE - DISCHARGE COMPUTATIONS WEIR LENGTH 0.5 FEET WEIR ELEVATION 15.50 FEET NGVD WEIR COEFFICIENT 3.13 TYPE OF BLEEDER SLOT 3 " CIRCULAR BLEEDER INVERT 13.50 FEET NGVD WEIR FLOW IN CFS STAGE WEIR BLEEDER TOTAL FLOW FLOW FLOW 13.50 0.00 0.00 14.00 0.00 0.14 14.50 0.00 0.22 15.00 0.00 0.28 15.50 0.00 0.32 16.00 0.55 0.36 16.50 1.57 0.40 17.00 2.88 0.43 s Page 5 of 5 3 S C S P R O G R A M PROJECT NAME . . . . : Coastal Orthopaedic & Sports Medical Center REVIEWER . . . . . . : Velcon Group, Inc. PROJECT AREA . . . . . 3.13 ACRES GROUND STORAGE . . . . 3.11 INCHES TERMINATION DISCHARGE : .02 CFS DISTRIBUTION TYPE : SFWMD RETURN FREQUENCY 10.00 YEARS RAINFALL DURATION 1-DAY 24-HOUR RAINFALL 6.00 INCHES REPORTING SEQUENCE : STANDARDIZED STAGE STORAGE DISCHARGE (FT) (AF) (CFS) 13.50 .00 .00 14.00 .09 .14 14.50 .17 .22 15.00 .26 .28 15.50 .35 .32 16.00 .64 .92 16.50 1.36 1.96 17.00 2.50 3.31 -� - - - - - - R E S E R V O I R - - - - - RAIN ACCUM. BASIN ACCUM. ACCUM. INSTANT AVERAGE TIME FALL RUNOFF DISCHGE INFLOW VOLUME OUTFLOW DISCHGE DISCHGE STAGE (HR) (IN) (IN) (CFS) (AF) (AF) (AF) (CFS) (CFS) (FT) .00 .00 .00 .0 .0 .0 .0 .0 .0 13.50 4.00 .27 .00 .0 .0 .0 .0 .0 .0 13.50 8.00 .82 .01 .1 .0 .0 .0 .0 .0 13.51 10.00 1.28 .11 .3 .0 .0 .0 .0 .0 13.63 11.00 1.61 .24 .5 .1 .1 .0 .1 .1 13.78 11.50 1.91 .38 .9 .1 .1 .0 .1 .1 13.93 11.75 2.81 .91 6.6 .2 .2 .0 .2 .2 14.39 12.00 3.94 1.71 10.1 .4 .4 .0 .3 .3 15.33 12.50 4.37 2.05 2.2 .5 .5 .0 .6 .5 15.71 13.00 4.60 2.23 1.2 .6 .5 .1 .6 .6 15.76 14.00 4.91 2.48 .7 .6 .5 .l .7 .7 15.79 16.00 5.28 2.79 .5 .7 .5 .2 .6 .6 15.75 20.00 5.'11 3.16 .3 .8 .4 .4 .5 .5 15.61 24.00 6.00 3.41 .2 .9 .4 .5 .3 .4 15.51 30.00 6.00 3.41 .0 .9 2 .7 .2 .3 14.74 36.00 6.00 3.41 .0 •.9 .1 .8 .2 .2 14.13 42.00 6.00 3.41 .0 .9 .1 .8 .1 .1 13.79 48.00 6.00 3.41 .0 .9 .0 .9 .0 .1 13.63 53.00 6.00 3.41 .0 .9 .0 .9 .0 .0 13.57 S C S P R O G R A M PROJECT NAME . . . . : Coastal Orthopaedic & Sports Medical Center REVIEWER . . . . . . : Velcon Group, Inc. PROJECT AREA . . . . . 3.13 ACRES GROUND STORAGE . . . . 3.11 INCHES TERMINATION DISCHARGE : .02 CPS DISTRIBUTION TYPE : SFWMD RETURN FREQUENCY 25.00 YEARS RAINFALL DURATION 3-DAY 24-HOUR RAINFALL 7.50 INCHES REPORTING SEQUENCE : STANDARDIZED STAGE STORAGE DISCHARGE (FT) (AF) (CFS) 13.50 .00 .00 14.00 .09 .14 14.50 .17 .22 15.00 .26 .28 15.50 .35 .32 16.00 .64 .92 16.50 1.36 1.96 17.00 2.50 3.31 - - - - - - R E S E R V O I R - - - - - RAIN ACCUM. BASIN ACCUM. ACCUM. INSTANT AVERAGE TIME FALL RUNOFF DISCHGE INFLOW VOLUME OUTFLOW DISCHGE DISCHGE STAGE (HR) (IN) (IN) (CFS) (AF) (AF) (AF) (CFS) (CFS) (FT) .00 .00 .00 .0 .0 .0 .0 .0 .0 13.50 4.00 .18 .00 .0 .0 .0 .0 .0 .0 13.50 8.00 .37 .00 .0 .0 .0 .0 .0 .0 13.50 12.00 .55 .00 .0 .0 .0 .0 .0 .0 13.50 16.00 .73 .00 .0 .0 .0 .0 .0 .0 13.50 20.00 .91 .02 .0 .0 .0 .0 .0 .0 13.53 24.00 1.10 .06 .0 .0 .0 .0 .0 .0 13.56 28.00 1.36 .14 .1 .0 .0 .0 .0 ..0 13.62 32.00 1.63 .25 .1 .1 .0 .1 .1 .0 13.69 36.00 1.89 .37 .1 .1 .0 .1 .1 .1 13.75 40.00 2.16 .51 .1 .1 .1 .0 .1 .1 13.81 44.00 2.43 .66 .1 .2 .1 .1 .1 .1 13.86 48.00 2.69 .83 .1 .2 .1 .1 .l .1 13.90 52.00 3.03 1.05 .2 .3 .1 .2 .1 .1 13.99 56.00 3.72 1.55 .5 .4 2 .2 .2 .2 14.43 58.00 4.29 1.98 .8 •.5 .2 .3 .3 .2 14.84 59.00 4.71 2.32 1.2 .6 .3 .3 .3 .3 15.17 59.50 5.09 2.63 1.9 .7 .4 .3 .3 .3 15.50 59.75 6.21 3.59 12.0 .9 .6 .3 .6 .5 15.73 60.00 7.61 4.84 15.7 1.3 .9 .4 1.1 .8 16.08 1 SUMMARY INFORMATION MAXIMUM STAGE WAS 15.79 FEET AT 14.00 HOURS MAXIMUM DISCHARGE WAS .7 CFS AT 14.00 HOURS J 1 - - - - - - R E S E R V O I R - - - - - RAIN ACCUM. BASIN ACCUM. ACCUM. INSTANT AVERAGE TIME FALL RUNOFF DISCHGE INFLOW VOLUME OUTFLOW DISCHGE DISCHGE STAGE (HR) (IN) (IN) (CFS) (AF) (AF) (AF) (CFS) (CFS) (FT) 60.50 8.16 5.34 3.1 1.4 1.0 .4 1.4 1.3 16.22 61.00 8.45 5.60 1.6 1.5 1.0 .5 1.4 1.4 16.24 62.00 8.83 5.95 1.0 1.5 1.0 .5 1.4 1.4 16.23 64.00 9.29 6.38 .7 1.7 .9 .8 1.2 1.3 16.16 68-.00 9.83 6.89 .4 1.8 .6 1.2 .9 1.1 16.00 72.00 10.19 7.22 .3 1.9 .5 1.4 .6 .7 15.73 80.00 10.19 7.22 .0 1.9 .2 1.7 .3 .4 14.92 88.00 10.19 7.22 .0 1.9 .1 1.8 .2 .2 14.09 96.00 10.19 7.22 .0 1.9 .0 1.9 .1 .1 13.71 104.00 10.19 7.22 .0 1.9 .0 1.9 .0 .0 13.57 104.50 10.19 7.22 .0 1.9 .0 1.9 .0 .0 13.57 SUMMARY INFORMATION MAXIMUM STAGE WAS 16.24 FEET AT 61.25 HOURS MAXIMUM DISCHARGE WAS 1.4 CFS AT 61.25 HOURS 1t2U,49C aC�2 S C S P R O G R A M PROJECT NAME . . . . : Coastal Orthopaedic & Sports Medical Center REVIEWER . . . . . . : Velcon Group, Inc. PROJECT AREA . . . . . 3.13 ACRES GROUND STORAGE . . . . 3.11 INCHES TERMINATION DISCHARGE : .02 CFS DISTRIBUTION TYPE : SFWMD RETURN FREQUENCY 100.00 YEARS RAINFALL DURATION 3-DAY 24-HOUR RAINFALL 9.00 INCHES REPORTING SEQUENCE : STANDARDIZED STAGE STORAGE DISCHARGE (FT) (AF) (CFS) 13.50 .00 .00 14.00 .09 .00 14.50 .17 .00 15.00 .26 .00 15.50 .35 .00 16.00 .64 .00 16.50 1.36 .00 17.00 2.50 .00 - - - - - - R E S E R V O I R - - - - - RAIN ACCUM. BASIN ACCUM. ACCUM. INSTANT AVERAGE TIME FALL RUNOFF DISCHGE INFLOW VOLUME OUTFLOW DISCHGE DISCHGE STAGE (HR) (IN) (IN) (CFS) (AF) (AF) (AF) (CFS) (CFS) (FT) .00 .00 .00 .0 .0 .0 .0 .0 .0 13.50 4.00 .22 .00 .0 .0 .0 .0 .0 .0 13.50 8.00 .44 .00 .0 .0 .0 .0 .0 .0 13.50 12.00 .66 .00 .0 .0 .0 .0 .0 .0 13.50 16.00 .88 .02 .0 .0 .0 .0 .0 .0 13.53 20.00 1.09 .06 .0 .0 .0 .0 .0 .0 13.59 24.00 1.31 .13 .1 .0 .0 .0 .0 .0 13.68 28.00 1.63 .25 .1 .1 .1 .0 .0 .0 13.85 32.00 1.95 .40 .1 .1 .1 .0 .0 .0 14.08 36.00 2.27 .57 .l .1 .1 .0 .0 .0 14.36 40.00 2.59 .76 .2 .2 .2 .0 .0 .0 14.65 44.00 2.91 .97 .2 .3 .3 .0 .0 .0 14.94 48.00 3.23 1.19 .2 .3 .3 .0 .0 .0 15.26 52.00 3.64 1.48 .3 .4 .4 .0 .0 .0 15.55 56_00 4.46 2.12 .7 .6 .6 .0 .0 .0 15.83 58.00 5.15 2.68 1.0 ..7 .7 .0 .0 .0 16.03 59.00 5.65 3.11 1.5 .8 .8 .0 .0 .0 16.10 59.50 6.10 3.50 2.4 .9 .9 .0 .0 .0 16.17 59.75 7.45 4.69 15.0 1.2 1.2 .0 .0 .0 16.29 60.00 9.14 6.24 19.3 1.6 1.6 .0 .0 .0 16.52 I - - - - - - R E S E R V O I R - - - - - RAIN ACCUM. BASIN ACCUM. ACCUM. INSTANT AVERAGE TIME FALL RUNOFF DISCHGE INFLOW VOLUME OUTFLOW DISCHGE DISCHGE STAGE (HR) (IN) (IN) (CFS) (AF) (AF) (AF) (CFS) (CFS) (FT) 60.50 9.79 6.85 3.8 1.8 1.8 .0 .0 .0 16.66 61.00 10.13 7.17 2.0 1.9 1.9 .0 .0 .0 16.71 62.00 10.59 7.60 1.2 2.0 2.0 .0 .0 .0 16.76 64.00 11.15 8.13 .8 2.1 2.1 .0 .0 .0 16.82 68.00 11.80 8.74 .5 2.3 2.3 .0 .0 .0 16.90 72.00 12.23 9.16 .3 2.4 2.4 .0 .0 .0 16.94 SUMMARY INFORMATION MAXIMUM STAGE WAS 16.94 FEET AT 72.00 HOURS MAXIMUM DISCHARGE WAS .0 CFS AT .00-HOURS s ,0,2p49O 0002