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HomeMy WebLinkAboutSite Utility Study• • Avant Site Utility Study Avant MAJOR USE SPECIAL PERMIT SITE UTILITY STUDY PREPARED FOR Avant L.L.C. by: KIMLEY-HORN AND ASSOCIATES, INC. 420 LINCOLN ROAD, SUITE 353 MIAM:I BEACH, FL 33139 MARCH 2004 Avant Page 1 • • Site Utility Study Introduction The Avant project is a proposed 16 story mixed-use/residential multi -family high rise building to be located on a total of approximately 0.85 +1- acres of land located on the southwest corner of NE 34th Street and Biscayne Boulevard, in the City of Miami, Miami -Dade County, Florida {see site location map -Fig 1). The development includes a residential tower constructed on a parking garage structure. It will consist of a total 114 residential apartments units, 8 retail units and approximately 187 parking spaces. Table 1, below depicts the details of the proposed project. Table 1: Project Summary Occupancy Units Floor Area (s0 Retail 8 14,765 Residential 114 116,730 Total 122 131,495 Parking 187 - I. Drainage Existing Drainage Presently, the site is undeveloped (sodded) on the east side of the property and the existing building on the west side of the subject site is to be demolished. There is no existing drainage system on -site. Avant Site Utility Study Page 2 • • Avant Site Utility Study Figurel: Site Location Map Page 3 • • • Proposed Drainage System The drainage system for the proposed development will consist of drainage wells and exf ltration trench, if possible, to facilitate on -site disposal of storm water runoff. The 5- year design storm event will be used to design the 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 four (4) 24" drainage wells 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 "A" Preliminary Drainage Well 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 project. II. Water Distribution System The water mains owned and operated by the Miami -Dade Water and Sewer Department (MDWASD) in the vicinity of the project are shown in the Table 3. Table 3: Existing Water Mains Location Between Water Main(s) Biscayne Blvd. NE 34th St and NE 33`d St. 16" D.I. NE 34th St Biscayne Blvd. and NE. 2'd Ave. 4" D.I. Avant Site Utility Study Page 4 • In accordance with MDWASD criteria, the owner will most likely be required to construct a new 12-inch ductile iron (DI) water main along the frontage of the property on NE 30 St.. The proposed 12" water main will likely be connected to the existing 16" along Biscayne Blvd. 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 owner's expense. See Attachment "B" for a copy of the MDWASD water atlas sheet for the project area. III. Sanitary Sewer Collection System Table 4 depicts the sanitary sewer mains owned and operated by Miami -Dade Water and Sewer Department (MDWASD), within the vicinity of the project. Table 4: Existing Sanitary Sewer Mains Location Between Sanitary Sewer Mains) Biscayne Blvd. NE 34th St and NE 33rd St. 60" Interceptor Main 8" Gravity Main NE 34th St Biscayne Blvd. and NE. 2nd Ave. 8" gravity main A copy of the MDWASD Sewer Atlas sheet has been attached. The proposed on -site sanitary sewer system for the property can probably be connected to either or both of the existing public gravity mains. A letter of availability and further coordination with MDWASD is recommended to verify the proposed sanitary sewer Avant Site Utility Study Page 5 • service connection points and requirements for this 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. The flows from the existing MDWASD sanitary sewage mains on Biscayne Blvd. and NE 34th St are received by MDWASD Regional Pump Station #2. As of February 20, 2004, this pump station is operating under capacity as established by the USEPA, and is not under any type of moratorium (see Attachment "C" Pump Station Monthly Infoi ► cation). 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. 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 5. Table 5: Water & Sewer Flow Generation Type of Occupancy Usage rate Total Average Daily Daily Flow (gpd) Apartment 114 units 200 gpd per unit 22,800 Retail 14,765 sf 5 gpd per 100sf 739 Total Anticipated Flow 23,539 gpd Avant Site Utility Study Page 6 • • • 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 either by private hauling companies and/or by the City of Miami Solid Waste Department, who will transport the waste to 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 6. Table 6: Solid Waste Generation Type of Occupancy Phase I Quantity Usage Rate Total Solid Waste Generated (Tons/.Day) 0.285 Apartment 114 units 5lbslunit/day Retail 14,765 sf 6lbs/1000 sf/day 0.044 Total Anticipated Solid Waste Generated 0.329 Avant Site Utility Study Page 7 • 0 • Avant Site Utility Study Attachment A Preliminary Drainage Well Calculations Page S AVANT City of Miami, Florida • • RAINAGE CALCULATIONS: "DRAINAGE WELLS" (MASS.DIAGRAM— DERM CRITERIA) 1. Site Data: A. Average October Water Table Elevation = B. County Flood Criteria Elevation = C. F.I.R.M. Base Flood Elevation = Outs F. Proposed lowest inlet grate elevation = 2. Total Contributing Drainage Area (A) : A. Impervious Areas: a) Asphalt and concrete pavement = b) Roof areas + 1/3 NE building corner = Total Impervious Area (A) B. Pervious areas: a) Green Areas 3. Weighted Runoff Coefficient (C): City of Miami Datum City of Miami Datum 0-year floodplain City of Miami Datum Runoff Coefficient Impervious (C1) Runoff Coefficient Pervious (C2) = C=[(AI xC1)+(A2xC2)]/A; C= C x A= Total Contributing Area; C x A = Mean High Water Elev. (County Flood Criteria Map, see Apx. A) (Map No. 12025C0183J, see Apx. A) 1.617 Acres Acres Acres 1.600 Acres (99%) Acres (I%) 0.894 1.44 Acres 4. Time required to generate one inch of runoff (per DERM Water Control Section D-4) Rainfall Intensity (I) = 308.5 / [(48.6 x F-t.II) + t (0.5895 + F23)] Frequency (F) _ :. ; years - Frequency Curve Q - CIA, V = Qt; Vt1 in.) Qttl in), to in.) = Time to generate 1 inch of runoff Vo i = ClAtit in.) I" x A = CIAt(t in.) ; Solving for to a.), il) = I" / (IC) Time to Generate one inch of run-off t(in) Time to reach the inlet (tc.) Total Time required to generate 1 in of runoff 21.11 Min. Min. Min. DraEnCalas Wells.xls BASIN 5. Cumulative Runoff (Inflow Mass Diagram) Time CxA (acres) 1 (inches) Q (CFS) Accumulated Storm Runoff (CF) (Min.) (See.) 8 480 1.445 6.405 9.25 4,442 10 600 1.445 6.166 8.91 5,346 15 900 1.445 5.641 8.15 7,336 21.11 1267 1.445 5.109 7.38 9,352 30 1800 1.445 4.493 6.49 11,686 40 2400 1.445 3.956 5.72 13,720 50 3000 1.445 3.534 5.11 15,320 60 3600 1.445 3.193 4.61 16,612 90 5400 1.445 2.477 3.58 19.327 120 7200 1.445 2.023 2,92 21,047 180 10800 1.445 1.480 2.14 23,103 6. Drainage Well Design Discharge Rate: Based on well discharge rate of 925GPM/ft. Head Well No. Lowest Inlet Rirn Elev. (City of Miami) Mean High Tide Elev. (City of Miami) Headloss due to Higher SG of Salt Water (ft.) Head Acting on Well (ft.) Well Discharge Rate (CFS) Well Structure Dimensions DW- I DW-2 DW-3 DW-4 6.00 6.00 6.00 6.00 2.26 2.26 2.26 2.26 1.87 1.87 1.87 1.87 1.87 1.87 1.87 1.87 3.85 3.85 3.85 3.85 Width (t.). Length (ft.) Well Structure Storage Volume (CF) 89.76 89.76 89.76 89.76 Well Discharge Rate (CFS) 7. Detention Time: 15.42 Total Storage (CF) The drainage well structure must be designed to detain runoff for a minimum of 90 seconds prior to discharge. Qd = Design Runoff Rate (CFS) Vd = Detention Volume (CF) = Qd x 90 sec. = Vdt = Detention Volume Per Well (CF) _ W = Width of Well Structure (ft.) L = Length of Well Structure (ft.) = 7.38 CFS 664.42 CF 166.10 CF 6.0 ft. 8.0 ft. 359.04 H,,,in. is the minimum depth required from the top of well casing to the floor of the well box to achieve 90 second detention time: (ft.)--Vd3/(WxL) 3.50ft_ Top of Well Casing Elev. --- Elevation at Floor of Well Box (NGVD) = Top of Well Casing Elev. - H - -0.80 • 8. Excess storm water runoff excluding well structure storage: Time Well Discharge Rate (CFS) Accumulated Well Discharge Volume (CF) Accumulated Storm Runoff (CF) Total Overflow Volume (CF) (Min.) (Sec.) 8 480 15.42 7,400 4,442 -2,958 10 600 15.42 9,250 5,346 -3,904 15 900 15.42 13,875 7,336 -6,539 21.11 1,266.80 15,42 19,530 9,352 -10,178 30 1800 15.42 27,750 11,686 -16,064 40 2400 15.42 37,000 13,720 -23,280 50 3000 15.42 46,250 15,320 -30,930 60 3600 15.42 55,500 16,612 -38,888 90 5400 15.42 83,250 19,327 -63,923 120 7200 15.42 111,000 21,047 -89,953 180 10800 15.42 166,500 23,103 -143,397 9. Excess storm water runoff including well structure storage: Time Accumulated Storm Runoff (CF) Storage in Well Structure (CF) Accumulated Well Discharge Volume (CF) Total Overflow Volume (CF) (Min.) (Sec.) 8 480 4,442 359 7,400 -3,316.83 10 600 5,346 359 9,250 -4,263.05 15 900 7,336 359 13,875 -6,898.00 21.11 1,266.80 9,352 359 19,530 -10,536.83 30 1800 11,686 359 27,750 -16,422.78 40 2400 13,720 359 37,000 -23,638.77 50 3000 15,320 359 46,250 -31,288.88 60 3600 16,612 359 55,500 -39,247.52 90 5400 19,327 359 83,250 -64,282.41 120 7200 21,047 359 111,000 -90,312.40 180 10800 23,103 359 166,500 -143,756.32 • Safety Factor 2.09% Safety Factor 2.17% .jn Kimley-Horn and Associates, Inc. 420 Lincoln Road Suite 353 Miami Beach, Florida 33139 Phone: 305-673-2025 Fax: 305-673-4882 AVANT F.I.R.M. FLOOD INSURANCE RATE MAP Kimley-Horn and Associates, Inc. 420 Lincoln Road Suite 353 Miami Beach, Florida 33139 Phone: 305-673-2025 Fax: 305-673-4882 AVANT FLOOD CRITERIA MAP Kimley-Hom and Associates, Inc. 420 Lincoln Road Suite 353 Miami Beach, Florida 33139 Phone: 305-673-2025 Fax: 305-673-4882 rcX1 MEAN SEA i VEL AVANT AVERAGE OCTOBER GROUND WATER LEVEL 1960-75 0 Attachment B Existing Utility Records • • a125 \ 04 \2 \ 1 / © Th l23\ 2 y g° i L L ®z» q� ..... fie} { 1 / 12- .� KE 31 7 12- �8578 1 . /11 92 2� : 2042 7 270 1837 223 224 226 24 248 47 242 2015 8" N 1€'" 287 28 2 268 3.71 Q r2B 7 28/ 1 / \ 4'1 r ,113.19 .44"1 :°` 1 8 229 t�F7R 2 E 34 ST 8-ON 10- 2= 440 1 NE31ST 2I 8\ 1 v2 0 • • design ticket 04941040.txt From: irth_host@callsunshine.com Sent: Wednesday, February 18, 2004 9:26 AM To: Fernandez, Jorge Subject: SSOCOF CONFRM 2004/02/18 #00001 04941040-000 NORM DSGN NEW CONFRM 00001 CALL SUNSHINE 02/18/04 09:25:38ET 04941040-000 DESIGN STREET Ticket : 04941040 Rev:000 Taken: 02/18/04 09:17ET State: FL Cnty: DADE Place: MIAMI Subdivision: Address : 238 to 274 Street : NE 34TH ST Cross 1 : NE 2ND AVE Within 1/4 mile: Y Locat: UTILITIES WITHIN BOUNDARIES BISCAYNE BLVD, NE 2ND AVE, NE 33RD ST & NE 34TH ST Remarks : In response to receipt of a design ticket, SSOCOF provides the originator of the design ticket with a list of SSOCOF members in the vicinity of the design project. SSOCOF does not notify SSOCOF members of the receipt by SSOCOF of a design ticket. It is the sole responsibility of the design engineer to contact SSOCOF members to request information about the location of SSOCOF members" underground facilities. Submission of a design ticket will not satisfy the requirement of Chapter 556, Florida Statutes, to notify SSOCOF of an intent to excavate or demolish. That intent must be made known specifically to SSOCOF in the manner required by law. In an effort to save time on future calls, save your design ticket number if you intend to begin excavation within 90 days of your design request. The design ticket can be referenced , and the information on it can be used to save time when you call in the excavation request. *** GEOCODED PLACE IS MIAMI *** *** LOOKUP BY ADDRESS *** Grids : 2548C801.10 254888011C 2548C8011B 2548B8011B Work date: 02/18/04 Time: 09:19ET Hrs note: 000 Category: 6 Duration: UNKNOWN Due Date : 02/20/04 Time: 23:59ET Work type: DESIGN Ug/Oh/Both: U Machinery: N Depth: UNK Permits: N N/A Done for : DESIGN Company : KIMLEY HORN AND ASSOCIATES Type: CONT Co addr : 420 LINCOLN RD Co addr2: SUITE 353 City : MIAMI BEACH State: FL Zip: 33139 Caller : JORGE FERNANDEZ Phone: 305-673-2025 Ext: 237 Contact : SAME Phone: 305-673-2025 Ext: 237 BestTime: 8-5 Mobile : 305-582-0628 Fax : 305-673-4882 Email : JORGE.FERNANDEZZ@KIMLEY-HORN.COM Submitted: 02/18/04 09:17ET Oper: KIM Chan: 40 Mbrs ATTF01 NANCY SPENCE 770-918-5424 AT&T COMM - NORTH 2315 SALEM ROAD CONYERS, GA 30013 Level 1: NO Level 2: NO Level 3: YES FEES WILL VARY Page 1 FAX 770-785-3125 • • design ticket 04941040.txt Level 4: NO CC1282 THOMAS CARROLL COMCAST CABLE 2601 SW 145 AVE MIRAMAR, FL 33027 Level 1: Level 2: Level 3: Level 4: DCPWT DWIGHT CARROLL/LEA PUBLIC WORKS - MDC 7100 NW 36TH ST MIAMI, FL 33166 Level 1: Level 2: Level 3: Level 4: FPLDAD TRACY STERN** FLORIDA POWER & LIGHT 4200 W FLAGLER ST (SDD/LFO) MIAMI, FL 33134 Level 1: NO CHARGE Level 2: SERVICES NOT PROVIDED Level 3: SERVICES NOT PROVIDED Level 4: SERVICES NOT PROVIDED FPLDBR TRACY STERN** FLORIDA POWER & LIGHT 4200 W FLAGLER ST (SDD/LFO) MIAMI, FL 33134 Level 1: NO CHARGE Level 2: SERVICES NOT PROVIDED Level 3: SERVICES NOT PROVIDED Level 4: SERVICES NOT PROVIDED FPLFOD SHELDON JORDAN* FPL FIBERNET 9250 W FLAGLER ST MIAMI, FL 33174 Level 1: NO CHARGE Level 2: SERVICES NOT PROVIDED Level 3: SERVICES NOT PROVIDED Level 4: SERVICES NOT PROVIDED HTE907 L3C900 NETWORK RELOCATIONS DEPT. LEVEL 3 COMMUNICATIONS LLC 1025 ELDORADO BLVD, BLDG 13 BLDG 13C04 BROOMFIELD, CO 80021 Level 1: Level 2: Level 3: Level 4: LS1104 MCIU01 954-538-9310 305-592-3470 305-442-5966 FAX 954-538-9423 FAX 305-477-6422 FAX 305-442-5975 BY MEMBER BY MEMBER BY MEMBER 305-442-5966 FAX 305-442-5975 BY MEMBER BY MEMBER BY MEMBER 305-552-4751 FAX 305-552-2411 BY BY BY MEMBER MEMBER MEMBER 877-366-8344 FAX 720-888-5223 C04 INVESTIGATIONS 972-729-6016 MCI FAX 972-656-6022 2400 N. GLENVILLE RICHARDSON, TX 75082 Level 1: $0 Level 2: SERVICES NOT PROVIDED BY MEMBER Level 3: SERVICES NOT PROVIDED BY MEMBER Level 4: SERVICES NOT PROVIDED BY MEMBER MDWS RAFAEL BALLESTEROS 305-669-7658 MIAMI DADE WATER SEWER FAX 305-669-7769 3575 S LEJEUNE RD Page 2 • • • design ticket 04941040.txt MIAMI, FL 33146 Level 1: Level 2: Level 3: Level 4: PGSMIA ANGEL L QUANT / LETHIA JAME 305-573-3820 PEOPLES GAS - FT LAUD FAX 305-576-5307 60 NW 17 ST MIAMI, FL 33101 Level 1: Level 2: Level 3: Level 4: QST885 FIBER PROTECTION CENTER 800-283-4237 QWEST COMMUNICATIONS FAX 303-992-1729 555 17 ST DENVER, CO 80202 Level 1: Level 2: Level 3: Level 4: SBF23 STEVEN B. MASSIE 305-222-8745 BELLSOUTH FAX 305-221-7652 9101 SW 24 STREET MIAMI, FL 33165 Level 1: FEE TO BE DETERMINE➢ Level 2: NOT PROVIDED BY MEMBER Level 3: FEE TO BE DETERMINED Level 4: NOT PROVIDED BY MEMBER TC1143 VIRGILIO ALVAREZ 305-914-9414 TCG SOUTH FLORIDA FAX 305-914-9424 995 NE 124TH ST NORTH MIAMI, FL 33161 Level 1: Level 2: Level 3: Level 4: USC964 JEFF YOUNT 310-385-3828 GLOBAL CROSSING TELECOMMUNICATIONS, INC FAX 310-409-7518 360 N. CRESENT DR BEVERLY HILLS, CA 90210 Level 1: Level 2: Level 3: Level 4: USSP01 SPRINT LONG DIST, ENGINEER 407-932-1560 SPRINT 10 EAST ➢RURY KISSIMMEE, FL 34744 Level 1: NO FEE HOWEVER WE WILL OFFER THIS Level 2: NO Level 3: NO Level 4: NO Page 3 • Attachment C Pump Station Monthly Information • 0 t. * l 3tat Station StationDeta Current Projected Dype Owner Numberai ET (Hrs) ET rs) ET riirs) )posed Number of gallons (gpd): 0 .A.***.**A. **********-****m* DownsLream Stions *******.*******,*-4**4,******* lir+ 30 0002 3.86 0.00 3.8.6 1002.06 :1002,06 10G2.04 T:.-2J 1002,04 30 RS 3Q RS95APR 100.1.76 0_00 1001.76 30 RS94MAR 1001_90 0,00 1001.90 • •