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Home My WebLink AboutTAB O - Site Utility StudyLOFTIKA MAJOR USE SPECIAL PERMIT SITE UTILITY STUDY 732, L.L.C. 7213 NW 12 Street Miami, FL 33126 SRS Engineering, Inc. 14160 Palmetto Frontage Road Suite 22 Miami Lakes, FL 33016 Tel: (305) 817-3393 SRS Engineering, Inc. Site Utility Study Introduction 14160 Palmetto Frontage Road, Suite 22 Miami Lakes, Florida 33016-1506 Tel: 30 5-817-3393 Fat: 305-817-339d. www.srs.corp.coin Loftika is a proposed mix -use retail/office/residential development to be located north of NW 7th Street between NW 32nd Place and NW 33rd Avenue, on approximately one and one half acre, in the City of Miami, Miami -Dade County, Florida (see Attachment "A" Site Location Map). Currently, three one story residential units, and two other buildings exist on the site, all of which are to be demolished as part of this project. The Loftika project includes a 13 story residential tower and a parking garage. The development will consist of a total of 183 residential apartment units, 14,871 SF office, 11,313 SF Retail and approximately 470 parking spaces. See Table 1, below for further details of the proposed project. Table 1: Project Summary Occupancy Units Floor Area (sfj Residential 183 179,479 Office 14,871 sf 14,871 Retail 11,313 sf 11,313 Non -FAR 274,267 sf 274,267 Parking 470 spaces - Total - 479,930 Engineering EB-00007317 May 9, 2006 Page 2 I. Drainage Existing Drainage Presently, the site is developed with five one story buildings with associated asphalt parking areas, and green areas. The existing drainage system will be demolished and a new stormwater management system will be constructed to retain the runoff generated by the proposed improvements, as required by code (see below). Proposed Drainage System The drainage system for the proposed development will consist of exfiltration trench to facilitate on -site disposal of storm water runoff. The 5-year design storm water management system, in accordance with Section D-4, "Water Control", of Part 2 of the Miami -Dade County Public Works Manual. Based on preliminary calculations, it is anticipated that six (6) catch basins connected to a total of 75 linear feet of exfiltration trenches will provide sufficient capacity to dispose of the design 5-year 24-hour storm water runoff generated by the proposed development. Preliminary drainage computations for the project areas are provided in Attachment "B" Preliminary Drainage Calculations, which includes the basis for design. The final drainage design for the project should be in conformance with the requirements of the Miami -Dade County DERM Water Control Section. Florida Department of Environmental Protection and other local, state and federal regulatory agencies having jurisdiction over the proj ect. II. Water Distribution System The public water distribution system that would serve the project is owned and operated by the Miami -Dade Water and Sewer Department (MDWASD). Existing water mains in the vicinity of the project are shown below in Table 2. Table 2: Existing Water Mains (Per MDWASD Water Atlas Sheet) Locatio Between Tatei am NW 7th Street NW 32nd Place and NW 33rd Avenue 12" D.I. NW 32nd Place East side of property 12" D.I. & 4" D.I. NW 33rd Avenue West side of property 8" D.I. Miami -Dade Water and Sewer Department (MDWASD) criteria normally require developers to SRS Engineering, Inc. May 9, 2006 Page 3 construct a new 12-inch ductile iron (DI) water main along the frontage of the property. Currently, a 12-inch water main fronts the property along the NW 7th Street and NW 32"d Place. A final determination of the points of connection and requirements will not be provided by MDWASD until a Water and Sewer Agreement is requested by the owner. Water service meters will be installed by MDWASD forces at the owner's expense. See Attachment "C" for a copy of the MDWASD water atlas sheet for the project area. III. Sanitary Sewer Collection System Table 3 depicts the sanitary sewer mains owned and operated by Miami -Dade Water and Sewer Department (MDWASD), within the vicinity of the project. Table 3: Existing Sanitary Sewer Mains (Per MDWASD Water Atlas Sheet) .ocation Sewer Mains) NW 7th Street NW 32nd Place and NW 33rd Avenue 10" Gravity Main NW 32nd Place East side of property 10" Gravity Main NW 33rd Avenue West side of property 10" Gravity Main Similar to the water main, an agreement with Miami -Dade County Water and Sewer Department (MDWASD) will be required for final determination of the points of connection. Public improvement requirements will not be provided by MDWASD until a Water and Sewer Agreement is requested by the owner. The proposed on -site sanitary sewer system for the property can be connected to the either of the existing mains abutting the property; provided that the line has capacity to handle the existing flows plus the additional flows contributed by the proposed project. MDWASD may require upgrades to the sanitary sewer system, but this can not be determined without a request for a water and sewer agreement. A copy of the MDWASD Sewer Atlas sheet has been attached (See Attachment C). The flows from the existing MDWASD gravity sanitary sewer mains abutting the property are received by MDWASD Regional Pump Station #117, located within the center median on NW 35th Court and NW 11th Street. As of April 2006, this pump station is operating under capacity as established by the USEPA, and is not under any type of moratorium (See Attachment "D" Pump Station Monthly Information). At this time, it is not anticipated that any improvements to the regional pumping and/or transmission systems will be required to connect the proposed project. SRS Engineering, Inc. May 9, 2006 Page 4 However, a final determination regarding the status of the existing transmission system and the need for possible improvements will not be made until construction plans are submitted to the Miami -Dade County DERM Wastewater Section and a Sanitary Sewage System Capacity Certification Letter is issued. The flows created by this project have been determined and are shown in Table 4. Table 4: Water & Sewer Flow Generation Type of Occupancy Total Average Daily Flow (gpd) Apartments 183 units 200 end/unit 36,600 Office 14,871 sf 10 d/100 sf 1,487 Retail 11,313 sf 5 gad/100 sf 566 Total Anticipated Flow 38,653 gpd IV. Solid Waste Generation Solid waste generated by this project will be collected in standard on -site containers for refuse and recyclables. Regular pick-up service will be provided by private hauling companies and/or by the City of Miami Solid Waste Department, who will transport the waste of Miami -Dade County's or private disposal and recycling facilities. The volumes of solid waste projected to be generated by the project are shown in Table 5. Table 5: Solid Waste Generation Type of Occupancy Quantity tTsage Rate Total Solid Waste Generated SRS Engineering, Inc. Apartments 183 units 5 lbs/unit/day 0.46 May 9, 2006 Page 5 Office 14,871 sf 6 lbs/1000 sf/day 0.04 Retail 11,313 sf 6 lbs/1000 sf/day 0.03 Total Anticipated Solid Waste Generated 0.53 Sys SRS Engineering, Inc. Attachment A Site Location Map FORS SRS Engineering, Inc. 1[1_ Ow 1 F.t Fi ,4 4. z e ' 4") 0 k.aCa (pa - Nw -. r‘14 •Yeit t14:tt ii .1-.... ..,,c.10 rit ' Se 8thSt z V --, !l- ,,I, a f7.. ..... GI i- t.:,r- ,,7 - , ,•,,,, 7.171 7.4 •—r. 7 i- 7, ..., P 1,73 o Nw 36th St > - — — ,-; a' Nw 24:th gt i 7.717.tf R(*) LILIG Rd Nw 21ut 1 11,t, Nv 3:3rd no, /43. ._ NNW)/2/.:LI51 1St. `21q, F L'41 Nw 25th St Nw 2.51h Nw 22r., Li SI Nw 21st St' Alla pa tta h 1,irpatNEI'v4v1'.'t St Part /-'xPY Nw Nw 4711 St 1\1 VO 51:11 *9 Nw 29th St Nw 26th St 23rd St 7 IQ. Nw 1911 SI 4 74 a._ Nw 1 itti St "0 rge m zi I. ..., 0 _ N. ro Nw lii.th St Nv 15111 St , 71 [ a.. Nw 1401 St Nw 911, St rw 7th St Nw blh St N•s,o AO I r'r 6i Nw I Lit SI ca 7:z fr, - a, kittAllii A 72,ara 'fifilay A ktat6oaAv4 NI.; 12th Tor jtr,840- - - ' . z 7 V- 7' Z ''• t,0 fl: ,..r. .`• C: 7' —4 ,CA t 0 = x:. cx = X.' 0 • J r% ,, SP 71 ch :Nw 3rd SI -IL ._1. — n L- i, -T t .,.. ) ,...., 17 Nw 2nci St %.i, F agyer St --- ---i .-, at — .. 7.' 20,4 Sid ft-A ' -- l R ....... , :p. -: ,;.... sw .51) st t Sw 7th 5111 ',41.11 St s'y 1 i't Nw 1Gt tor Nw 7th St Nw MI Vtil Flag 61 (4' Sw 1St St •_ Sw2r it] () St If 9'h St S'w 21st Si s 22nd St .. Mica•IsKitr, Silver Muff Estates Btlaroot WaY ' d St evilla it'Nu 24111 St The Pines 2.bith St 251AiTer '31 Shenandoah 7.P "c• ''cV4 cov,-At 972 3 kr\ CO c<ti:Y. PIN h._ SRS Engineering, Inc. 14160 Palmetto Frontage Road, Suite 22 Miami Lakes, Florida 33016 Tel: (305) 817-3393 Fax: (305) 817-3394 LOFTIKA SITE LOCATION MAP Attachment B Preliminary Drainage Calculations klalS SRS Engineering, Inc. IV Serralta Rebull Serig, Inc. ENGINEERING 1160 Palmetto Frontage Rd. Miami Lakes, Florida 33016 Tel: (305) 817-3393 Fax: (305) 817-3394 CONSTRUCTION PROJECT: LOFTIKA PROJECT NO.: E-0617 FILE NO: E-0617 BAS 1 COMPUTED B`r E.N. DATE: 05/08/06 CHECKED BY: O.S. DATE: DRAINAGE CALCULATIONS BASIN - 1 GIVEN: TOTAL AREA IMPERVIOUS AREA PERVIOUS AREA IMPERV. COEFFICIENT PERVIOUS COEFFICIENT RUNOFF COEFFICIENT (C) DESIGN WATER TABLE (October) FLOOD CRITERIA INLET GRATE ELEVATION TRENCH BOTTOM ELEV. PVMNT SECTION DEPTH SAFETY FACTOR HYDRAULIC CONDUCTIVITY AVG. (K) (SEE ATTACHED TESTS) WIDTH bottom = TRENCH SLOPE =1 VERT. TO INVERT PIPE ELEVATION DRAINAGE PIPE DIAMETER CALCULATED 5.00 1.42 1.08 0.34 0.90 0.30 0.76 3.00 5.50 11.60 -3.40 1.50 2 5.00E-05 4.00 0.00 7.60 1.50 [YEARS] [ACRES] [ACRES] [ACRES] [CONST] [CONST] [CONST] [FEET ABOVE NGVD] [FEET ABOVE NGVD] [FEET ABOVE NGVD, LOWEST] [FEET, NGVD] [FEET] [CONST](a safety factor of 2 is built in to the formula) [CFS/SF/FT OF HEAD] 01.3SUMED, [FEET] [HORZ.] [FEET ABOVE NGVD, LOWEST] [FEET] H2 = Du = Ds Wavg = STORAGE AREA = Saturated condition STORAGE VOLUME = Q/LF = k((2 H2 Du)-(Du)^2+(2 H2 Ds))+.000139WDu ACTUAL Q/LF = DESIGN Q/LF = TOTAL TRENCH LENGTH (TRY?)= TOTAL NUMBER OF INLETS = 2.3 1 LF EA MINIMUM TRENCH LENGTH PER INLET = TOTAL STORAGE VOLUME (S) = ACTUAL EXFILTRATION = DESIGN EXFILTRATION = 8.6 FT 7.1 FT 6.4 FT 4 FT 15.08 SF 15.08 CU.FT./L.F. 0.013 CFS/L.F OF TRENCH 0.007 CFS/L.F OF TRENCH (TRENCH PROVIDED = 25 LF. 25 LF 346.92 CU.FT. 0.30 CFS 0.15 CFS DESIGN CURVES FOR A 5-YR FREQUENCY STORM (MIAMI) DRAINAGE CALCULATIONS BASIN - TIME [MIN] (t) INTENSITY [IN/HR] (i) INFLOW [CFS] (Q=CIA) INFLOW CUMULATIVE [CU. FT.] (Q=CIA) STORAGE [CU. FT.] (S) ADJUSTED INFLOW [CU. FT.] (Q-S) ACTUAL EXFILTRA. [CU. FT.] OVERFLOW [CU. FT.] (Ponding) 0 0.5 5 10 15 20 25 30 40 50 60 90 120 150 180 0.00 6.80 6.70 6.20 5.55 5.20 4.70 4.40 3.80 3.50 3.25 2.55 2.20 1.80 1.60 0.00 7.30 7.19 6.65 5.96 5.58 5.04 4.72 4.08 3.76 3.49 2.74 2.36 1.93 1.72 0 219 2157 3992 5360 6696 7565 8499 9787 11268 12555 14777 16998 17384 18543 347 347 347 347 347 347 347 347 347 347 347 347 347 347 347 -347 -128 1810 3645 5013 6349 7218 8152 9440 10921 12208 14430 16651 17037 18196 0 0 4 0 45 1765 90 3555 135 4878 180 6169 225 6994 270 7882 360 9080 450 10471 540 11669 810 13620 1079 15572 1349 15688 1619 16577 INFLOW (CU.FT.) 20000 18000 16000 14000 12000 10000 8000 6000 4000 2000 0 DESIGN CURVES (5-YR FREQ.) 50 100 TIME (MIN.) 150 -fr-INFLOW CUMULATIVE (CU.FT.) -0-- ADJUSTED INFLOW (CU.FT.) -0-ACTUAL EXFILTRATION (CU.FT.) -0-OVERFLOW (CU.FT.) 200 vir 4� et VW Serralta Rebull Serig, Inc. 4160 Palmetto Frontage Rd. Miami Lakes, Florida 33016 Tel: (305) 817-3393 Fax: (305) 817-3394 ENGINEERING CONSTRUCTION PROJECT: LOFTIKA PROJECT NO.: E-0617 FILE NO: E-0617 BA; 1 COMPUTED BY: E.N. DATE: CHECKED BY: O.S. DATE: 05/08/06 0 DRAINAGE CALCULATIONS FOR WATER QUALITY "C" Factor for Impervious Areas "C" Factor for Pervious Areas Acres of Impervious Areas Acres of Pervious Areas Length (LF) of French Drain provided Seepage Capacity in CFS/LF Available Storage per LF Weighted Coefficient of Runoff Total Drainage area in acres (AC) Volume of 1.93 Inch of Runoff in CF Storm Frequency in years Initial Time of Concentration in MIN. Time to Generate 1.93 Inch of Runoff Time to Generate & Flow 1.93 Inch of Runoff 0.90 [CONST] 0.3 [CONST] 1.08 [ACRES] 0.34 [ACRES] 25 [FEET] 0.00652 [CFS/L.F OF TRENCH] 15.08 CU.FT./L.F. 0.76 [CONST] 1.42 [ACRES] 9,941 [CU.FT.] 5 [YEARS] [MIN.] 38 [MIN.] 43 [MIN.] 5 Note : 1.93 inch of runoff = 2.5 times the percentage of area impervious ray BROWARD Project Site w J N z 0 U_ W' O 0 Z '_ J • H 3`: fvi 0 z - EVERGLADES NATIONAL PARK COUNTY METROPOLITAN DADE COUNTY PUBLIC WORKS DEPARTMENT .. r r Rovto 6 /24:77 REVISED GENERAL DETAIL BASE MAP OF DADE COUNTY - JUSE WITH OVERLAYS 18t 2) _. .tea- 7.3 SHEET .LOF I A►� d�- SLY SRS Engineering, Inc. 14160 Palmetto Frontage Road, Suite 22 Miami Lakes, Florida 33016 Tel: (305) 817-3393 Fax: (305) 817-3394 LOFTIKA Location Map /1- BROW-ARD T er / f � I ' / / (SJ fe COUNTY 117 S7/ — RANGES EAST G115• •, •f �f.I •C •C(•I / G•4ae / r 6 5, 4 54 44. Project Site Oct. Ground Water Elev. = 3.0 502 G 25, G 565 • ;6 • • SCALE IN MILES 5 6 i y Lr • 6 970 •Y • 0 :Jr s" - NOTES I- CONTOUR INTERVAL 1.0 FOOT (Except as indicated) �° ' •� 2. DATUM IS MEAN SEA LEVEL. o � • • • t • LEGEND: __2_-- (ESTIMATED) NOTE' PREPARED FROM USGS. SURVEY DATA METROPOLITAN DADE COUNTY PUBLIC WORKS DEPARTMENT A.FFROVEC 4/. 72 REVISED 2f"a. 1S 4/1w/'77 DESIGN STANDARDS AVERAGE OCTOBER GROUND WATER LEVEL 1960 —75 W.C. 2-.2 S EET I OF SRS Engineering, Inc. 14160 Palmetto Frontage Road, Suite 22 Miami Lakes, Florida 33016 Tel: (305) 817-3393 Fax: (305) 817-3394 LOFTIKA Average October Ground Water Level I S c e 10 15 20 30 60 IOO YR.FREQ. ^� MAXIMUM RAINFALL RECORDED AT MIAMI 1 - INCHES 0 YR_FREp. 9 i TIME AMOUNT pER HR. DATE 25 YR. FR p. ■��I, I 5 MIN. .83 .96 (7/13/57) IS I.B9 7.56 (10/II/47) -p Y. FR ' III\�. 30 3.02 6.04 (9/3/59) - - B';��I'l11'1i Illy. �111' ', ,,(` 60 1HR. 4.60 4.60' (4/25/79) 5 YH.FREO. 'j ��11' �"It ��11 2 HRS. (4/25/79) ®•',�11�1'�'�_ ii.i '�\I� 3 (4/25/79) 3�IR FRE•. ��1\r- i �,1 1 I\, \1 \ (4/24,25/79) 1 YR. FREp. 6',I !I�� ,1``I� I''�� 1� , 1 z �i .11• 30/25)-. .. Ititili01100,4M6 ' , 17.26 (5/31,6/IZ/30) 19 28� - (5/29,6/2/30) ' �1i • 31.8 I (5/27, 6/25/0)' iils1k1i11►►1 24 IIIIIIiiiI;ibioIIIIIiffluI lkilippNook -i'l$kl'Illl'‘I'k #1111 175 1111-00S o m Z 0 o J 1.5 11 '`I ,1 ��,�� C � J q11 I I - - i I 'Ik'\ 1 mAo 1,it�,Iii►►►►. 0.7,ll11"'lll®i®'1®,lll"' , 1U(thi1ilt- 11 Ili 1 IM1 Y `kI Y.. 10 15 20 30 40 60 2 - 3 - 4 - 5 6 - T 8 -/O /2 lc = MINUTES HOURS NOTES CURVES REVISED TO 1/74, TABLE REVISED TO 3/81 SOURCE: OAVtD__YARNELL,. D..B.S.MIT.H,.R...K. LINSLEY, G. E. McCURDY, U. S. CORPS OF ENGINEERS U.S. WEATHER BUREAU, A. G. MATHEWS (FLA. CONS. DEPT.), AND OTHERS. Wir SRS Engineering, Inc. 14160 Palmetto Frontage Road, Suite 22 Miami Lakes, Florida 33016 Tel: (305) 817-3393 Fax: (305) 817-3394 LOFTIKA Rainfall Intensities - Miami rs 20 = rr rs LEAN • V U GARDENS • )) C.N. . MEOL Y - 7 r•..uc. • • ! • r N/A / IIPRI • SSl 30 ), .3 Project Site Elev. 5.5 r ra JD/NNER KO' »n.n \]— 5.5 RTH NIAp/ 30 Y/ SNORES 53 -42; F/SNER SIANO. .11 N,RD )) 5NRF5/O SRS Engineering, Inc. 14160 Palmetto Frontage Road, Suite 22 Miami Lakes, Florida 33016 Tel: (305) 817-3393 Fax: (305) 817-3394 LOFTI KA Miami -Dade Flood Criteria Map Attachment C Existing Utility Records 6IZS SRS Engineering, Inc. 284 18": 1211 125 s 1281 - r 4887\ Project Site SEWER (J-13) 28 144 177 /112 11J • 4087 28 6B6 505 26 VW SRS Engineering, Inc. 14160 Palmetto Frontage Road, Suite 22 Miami Lakes, Florida 33016 Tel: (305) 817-3393 Fax: (305) 817-3394 LOFTIKA MDWASD SEWER ATLAS SHEET a CO 0 270 7408 1 �70 f 12" 4•" ( 7408 4n 3 a (sty) VJESTER nit,. S l7270 NN 12" 7408 8) 7186 Project Site WATER (J-13) NWST U (2237 '\I i 7186 r 7853 NW 5 ST SRS Engineering, Inc. 14160 Palmetto Frontage Road, Suite 22 Miami Lakes, Florida 33016 Tel: (305) 817-3393 Fax: (305) 817-3394 LOFTIKA MDWASD WATER ATLAS SHEET Attachment D Pump Station Monthly Information 6.11S SRS Engineering, Inc. APR. 20.2006 2:58PM Pump Station Monthly InformatLon Station..30 -0117 .Atlas pg..1713 MIAMX DADE WATER & SEWER DEPARTMENT Addr..1090 NW 33 CT Sec -Town .p-Range 33-53-41 Ge r.0 ET clock.1 Te1m.Y #Pumps. 2 Pump Type.B Stn Ciass.L Speed.2 nr'spwr.a. Res flow(gpd) Proj Napot % Cap PZan.. 35,979 6.76 hrs 68.00 Date 02/13/2006 01/12/2006 12/09/2005 11/08/2005 10/10/2005 09/09/2005 08/10/2005 Mo . NAPOT Avg Daily 5.69 5.79 5.76 5.84 7.77 6.11 5.69 5.79 5.76 5.84 7.77 6.11 .92 5.92 Regard Reading Y Y Y Signature..VEtA E 4.D/M Station i<m provement GOLD/S GMD/D <D>ournstream Station LD/G Codes & Cata<g>aries COLD/'.P Na 360 {P.: man Review.> Moratorium —OK . 4,4 Moratorium effective since Yearly NAPOT (hrs ) Stn Gross Uapacity(gpd) . Station Reduction ?actor Stn Net Cap Certi f (gpd) , . Str2 Net. Capacity (gpd) ... . Indicated Flaws(gpd) 6.56 4,896,000 1.00 0 4,096,100 1,342,320 Number of pumps 2 2 2 2 2 Sign Date..03/03/1995 14:18:2D.f4 cS>tation Inform. GOLD/U <U>pstream Station GOLD/P <P>'oxnp Information Sewor Cer<t>ification Continents 11)-, 41"-C)0-.3 Cfr( 2,0 TOG A►� SRS Engineering, Inc. 14160 Palmetto Frontage Road, Suite 22 Miami Lakes, Florida 33016 Tel: (305) 817-3393 Fax: (305) 817-3394 LOFTIKA SEWER PUMP STATION INFORMATION