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HomeMy WebLinkAboutArticle III. Tab C. Site Utility StudyTAB C Site Utility Study 0 . o o April 2010 City Center MAJOR USE SPECIAL PERMIT SITE UTILITY STUDY PREPARED FOR RNG Overtown, LLC Prepared by: KIMLEY-HORNAND ASSOCIATES, INC. 1691 MICHIGAN AVENUE, SUITE 400 MLAMI BEACH, FL 33139 KHA Project Number: 043355000 t FllKimley-Horn and Associates, Inc. April 2010 City Center MAJOR USE SPECIAL PERMIT SITE UTILITY STUDY 3 PREPARED FOR RNG Overtown, LLC Prepared by: KIMLEY-HORNAND ASSOCIATES, INC. 1691 MICHIGAN AVENUE, SUITE 400 MIAMI BEACH, FL 33139 KHA Project Number: 043355000 n Site Utility Study Introduction City Center is a proposed multi -phase 340 unit residential development located on approximately 1.37 acres in the City of Miami, Miami -Dade County, Florida. The subject site which consists of nine (9) contiguous parcels„ is bounded by NW 12t1i Street on the north, NW 11th Terrace on the south, NW 1st Court on the west and NW 1st Avenue on the east. (See Site Location Map below) Figure 1 Site Location Map NW 17TH ST ORTH a NW 16TH TE x NW 16TH ST NW 15TH ST W 14TH TE Ma 1 gra 111\ ROJEC i NW 13TH�. J ++I Now U z NE 17TH TE U 7 a J a w NE NE 17TH 16TH F NE 15TH ST w z NE 14TH ST TE U w z Q 17TH ST 0 N NE w ST Z NE NE NE 13TH TE E 13 H ST NE 13 NE 12fH ST NE NE 11TH 11TH ST NE 10TH ST 10T Page 2 City Center shall be constructed in three (3) phases. At build -out the City Center shall consist of: two (2) twenty six floor towers, a seven (7) story linear building and associated structural parking facilities to serve the development. Table 1 Project Summary Proposed Building Type of Occupancy Quantity Floor Area (SF) Phase I Tower 142 Units 2 bedrooms 3 bedrooms 74 68 Parking Garage Podium Parking 185 spaces Phase II Tower 142 Units 2 bedrooms 3 bedrooms 74 68 Parking Garage Podium Parking 185 spaces Phase III Tower 56 Units Parking Garage Podium 2 bedrooms Parking 56 185 spaces Drainage Existing Drainage System According to the survey prepared by Scwebke-Shiskin & Associates, Inc, dated January 10, 2005, the subject site is currently vacant with no installed drainage system. An off -site drainage system does exist within the abutting rights -of -way. Page 3 Proposed Drainage System The drainage system for the proposed development may consist of catch basins and exfiltration trenches to facilitate onsite disposal of stone water runoff. The 5- year, 24-hour design stone 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 estimates, it is anticipated that approximately 300 LF of exfiltration trench will provide sufficient capacity to dispose of the additional 5- year 24-hour design stone water runoff generated by the proposed redevelopment. This preliminary estimate is based upon a 220 LF per acre assumption which may vary substantially upon execution of an onsite geotechnical study. This also assumes that exfiltration trench currently exists onsite, in sufficient quantities to dispose of the 5-year, 24 hour run off generated by the existing buildings and impervious areas. 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. Flood Criteria The proposed project site grade elevations will be designed to meet floodplain management criteria according to Federal, State, Miami -Dade County and City of Miami standards as follows: The subject property is located in PANEL 312 of COMMUNITY -PANEL NUMBER 12086C0312L of the Flood Insurance Rate Map (FIRM). According to the National Flood Insurance Program, the property is located within Flood Zone X. According to FEMA, properties with a Flood Zone X designation, lie outside the limits of the 500-year flood plain and hence are subject to minimal flood hazard. Miami -Dade County Flood Criteria elevation is estimated to be 6.0-feet NGVD. This will be used to determine proposed minimum site grade elevations. The average October ground water table elevation is estimated to be 2.0-feet NGVD. This will be used as the control water elevation for stormwater management calculations (Source: Miami -Dade County Public Works Manual, Volume II — Design Standard Detail WC 2-2). Page 4 Copies of the Flood Maps for the subject site have been provided in Appendix C. II: Water Distribution System Per the MDWASD water atlas sheet (F-13) provided by MDWASD, a 6-inch water main is located along the northern and western limits of the property on NW 12th Street and NW of 1st Court. A 2-inch water main is housed within the right-of-way of NW 11t1' Terrace and NW 1st Avenue, extending the full length of the property. A copy of the water atlas sheet for the subject site has been provided in Appendix A. MSWASD may request the installation of a 12-inch watennain within the right- of-way of at least one of the streets abutting the subject property. There is an existing fire hydrant on the west side of NW 1st Court. It is likely that MDWASD may request the installation of additional fire hydrants within the vicinity of the proposed development. A final determination of the points of the connection and requirements will not be provided by the MDWASD until a Development Infoiivation Form and Water & Sewer Agreement is requested by the owner. Water service meters for the development would need to be purchased by the owner and installed by the MDWASD officials. III. Sanitary Sewer Collection System Per the MDWASD sewer atlas sheet (F-13) provided by MDWASD, an 8-inch gravity sewer main exists within the rights -of -way of NW 1st Court and NW 1st Avenue. Please refer to Appendix A for a copy of the MDWASD sanitary sewer atlas sheet for the subject area. It is probable that the existing 8-inch gravity sewer mains adjacent to the proposed development will have sufficient capacity to accommodate the proposed development. However, this cannot be verified until a downstream analysis of the existing lines is completed. It is possible that WASD may request the installation of additional gravity mains within either NW 12t1i Street or NW 11 Terrace. This may also be required depending on the developer's desired location of the service lines for the proposed City Center towers. A Water & Sewer Agreement and further coordination with the MDWASD is recommended to verify the proposed sanitary sewer service connection points, necessary upgrades to the existing system and other MDWASD requirements for this project. The sanitary sewerage flows generated by the proposed development will be collected by an off -site MDWASD owned pump station. As of 03/18/2010, the associated pump station is operating at an average yearly NAPOT of 4.84 hrs or Page 5 48.4% of its capacity. The DERM pump station monthly information sheet for this pump station has been provided in Appendix B Based on available data, ILIA anticipates that neither a new sanitary sewer pump station nor upgrades to the existing pump stations will be required to accommodate the proposed site development. 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 Department of Environmental Resources Management (DERM) Wastewater Section and a Sanitary Sewage System Capacity Certification Letter is issued. Please refer to Attaclunent `B" for Pump Station Monthly Infonnation. The anticipated water and sewer flow generation for the building additions is depicted below in table 5. Table 5 Water & Sewer Flow Generation Proposed Building Type of Occupancy Usage Rate Total Average Daily Flow (GPD) Phase I Tower Apartments 142 200 gpd/unit 28,400 Parking Garage Podium Parking 185 spaces - - Phase II Tower Apartments 142 200 gpd/unit 28,400 Parking Garage Podium Parking 185 spaces Phase III Linear Building Apartments 56 200 gpd/unit 11,200 Parking Garage Podium Parking 185 spaces - Total Anticipated Flow Page 6 IV. Solid Waste Generation Solid waste generated by this project will be collected in standard onsite 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 Proposed Building Occupancy Quantity (Units) Usage Rate LBS/DAY/UNIT Total Solid Waste Generated (TONS/DAY) Phase I Tower 142 3.81 0.28 Phase II Tower 142 3.91 0.28 Phase III Linear Building 56 3.91 0.11 Total Anticipated Solid Waste Generation IZ 6.Z Page 7 Attachment A MDWASD Water and Sewer Atlas Page 8 2u 8082 1 2°—+— a- 1550 1 Nor OVER —I 20 HOP AVER NW 9 ST HOP OVE2 R 2 2 378 Delhettg &tele= flay Day MIAMI-DADE WATER AND SEWER DEPARTMENT 3575 S. Le Jeune Rd. Miami, Fla. 33146-2221 Phone: (305) 665-7471 WATER ATLAS (F-13 ) ER No.: Scale: N.T.S. Drown by: J.A. Sheet 1 OF 1 Page 9 rTh t / 381 25 431 / 3208 \ / 3252 1 ''''''---/3229 / 3750 1 \ '‹ NE 135T ,,/ 3389 \ 1 184 "e • • 7 20" • 432 433 0. 3258 3285 3 47--\\ 3227 \ / 43 \ • z 356 o /---\-----,,,,,„._. 357 \ 1 / 3 368 • • NW 2 AV 440 5481 43 • 3284 438/ \ 4 43 ' 360 1 " 3351 1 (3'351\ 1 • 458 3251 1 3226 1 \ / ' -: sea 3225 1 3360 ' ' /., \ r \ 9999 3779• / 454 _ 455 457 - e 362 • 453 -4. 32 79 1 - 458 _7. — `- 370 T-*./ ' k 1 1 •• >i _-_* • I 66 \ (3339 1 465 - 3 8 464 \ 0 \ 463 459 2 >, • 360: 461 363 ;364 .-- 382 3 3278 __c >/---s 547910 ..- ti) .4 +- _ :_- _ ) 1 / 10 ST 1 \_Z 92 on lir:1E .43778 win Te 3224 1- —\-- 663223 1 \_:,_// -0.-->—.12. 10° • •• \ 10° \ 10° ill IA e- / 5479 \____./2 Ny 5325 1 \ / 480 1 ‘ 33281 N 1 , 48T _ / _ 3 \---- - \ 22 / 386 389 / \ 385 \ / \ 5488 5488 17 , / \ / \ 8 / 5488 7 NW 9 ST 2 *tr. M z _ bilillr 24" 24° 2424' lir 18 3276 1 .gr Pr co 484— --"M e- _(/[9:43N1 500 499 884 - i - - 1 = _ A /----\, 5488 aao \ 2 / /----\ / 5488 \ 1 9 )/ MIAMI- ,,- MIAMI-DADE WATER AND SEWER DEPARTMENT 3575 S. Le Jeune Rd. Miami, Fla. 33146-2221 Phone: (305) 665-7471 SEWER ATLAS (F.13 ) ER No.: . Scale: N.T.S. Drawn by: J.A. Deiheriny Excefence Every Day Sheet 1 OF 1 Page 10 Attachment B Pump Station Monthly Information Page 11 Sanitary Sewer Pump Stations Database Pump Station Monthly Information Pump Station: 30 - 0002 UNINCORPORATED DADE COUNTY 925 BISCAYNE BLVD Station Category: ET NOTE: All Flows are in GPDS. Moratorium: OK OK Section - Township - Range: 31 - 53 - 42 Type: Class:❑M Speed:: H,P.:❑+ Peak Factor (last 7 entries): 2.40 Peak Modified Date: Factor By: 2.40 TRANSFER 01272007 Number of Pumps: 5 Moratorium in effect since: 1/27/2007 Generator: Y❑ Telemetry: ❑Y ET Clock: Y❑ Yearly NAPOT (hrs): 3.98 Reserved Flow (gpd): 1,231,862 Projected Napot (hrs): 4.84 Used Capacity (%): 48.40 Stn Gross. Capacity (gpd): 57,600,000 Station Reduction Factor: 0.60 Stn Net Cap Certified (gpd): 0 Station Net Capacity (gpd): 34,560,000 Indicated Flow (gpd): 5,731,200 Date: NAPOT: Avg. Daily: Reading: # of Comments: Pumps: Modified By: Date: 12/30/2009 11252009 10272009 9282009 8272009 7292009 629/2009 5/29/2009 4/29/2009 3/312009 4.34 4.12 4.10 4.42 3.89 4.27 5.54 3.11 2.92 3.08. Generated: 3118/2010 - 01:28. PM 17.34 16.49 16.40 17.67 15.54 17,07 22.15 12.45 11.66 12.31 Y Y Y Y Y Y Y Y Y Y 5 5 5 5 5 5 5 5 5 NEUMAR NEUMAR NEUMAR NEUMAR NEUMAR NEUMAR NEUMAR NEUMAR NEUMAR NEUMAR 01/28/2010 12282009 11/25/2009 10282009 09/28/2009 08/24/2009 07292009 07/082009 05282009 04/24/2009 Pagel of t im Attachment C Maps Page 13 1 1 1 1 1 1 8 A 8 1 1 1 t SCAE NTR O BEIGNED BY O RAWI BY ERLD CHEMED BY ESLD MIAMI DADE COUNTY AVERAGE 1999 OCTOBER WATERTABLE t t t 4 4 • ta X • t-1. '4tt sw • ma sr SW23251 SW 2.111ST SW MIST SNY MOST SW 290 ST Ermin Kirdepliorn and AssOdatit, Co() 2210 flhZ$-H�0 4280 ASSOCiAlEit.112. 1691 AVE MEE 400, IBABI MAN. 88. 32,31 884840 385-073-2125 2222 305-873-44332 WRIM82EY-HORK12211 CA MCCOMB 202ST BW MB ST NW 170ST AV/154 ST DATE 03/08/10 PRCLECT NO. AVERAGE OCTOBER GROUNDWATER DEPTH RNG OVERTOWN MIAMI, FL PROJECT LOCATION (ELEV. 2.0' NGVD) OBBICM DIGINEER: RONDA 7.2 LJOEXSE pitmans 08720 BNEET NUMBER C.1 Page 14 ACNE NTS DEFINED BY dUSM 6r ESuD CIIEOa01 0T Eg0 MIAMI DADE COUNTY AVERAGE 1999 OCTOBER WATERTABLE SW42 sr SW GI ST 3Y W ST KmlepHom. ��� and Associated, Inc. Cc 2Ma 11.00-3aw AID 'AS30G5TE tic f621 IWW II AVE 97R ADD. WIND BEAtlM, R. 3:n21 MOIL 305-073-2025 FAX: 703-573-4/62 Innuakay-Nw xte G c00c0635 202 S7 AV/122ST NW 170 Sf NW 154 ST — NW 130St._ NW 122` MY WU.1_ Nums>^ .NW id STI_. NW526L.'- NW AI tf -- N T 12 uT DATE 03/08/10 PBG. 00 NQ AVERAGE OCTOBER GROUNDWATER DEPTH RNG OVERTOWN MIAMI, FL DEBRA EMOREEt F1.0N5A P.D. BOIN RAINER DATE: SMELT NUMBER C-2 Page 15 1 i 1 a 1 1 a 1 1 1 1 a A 1 f 1 1 f a 1 e 1 1 1 • Q Q Q I- m 17 41- M N 0 !` F- r / 202 ST /186ST /170ST /154ST / 138GT 1122 1 106 ST- 1' 190 S 74 S 58Si:_ 141 ST7_._ 120E 1125 co al MIAMI-DADE COUNTY FLOOD CRITERIA wn vvll n v -A k. N N c! w - w w Lai w Z ____ PROJECT LOCATION (ELEV, 6.0' NGVD) SCALE ' N75 DOOMED BY OFA11F BY 6LC C11ET1001 BY ESLD �—v bmley-Hom i end Assodalee, Inc. ©'00 MST -HORN 00 ASSOW7ES, 70. 1445 YO1C II AVE SLUE 40 BIABI BEAN, FI. SBJP %NSB ]OB-SA-rims FAk. 301-4113--4882 10140 1 E1'-FION.WY CA 00000688 DATE 03/08/10 PROJECT N0. RNG OVERTOWN MIAMI, FL 0E5101 001/I EA: FI0W OA F.E 11 W15E I70AFh DATE SHEET NUMBER C-3 Page 16