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HomeMy WebLinkAboutIII Tab 3 Site Utility Study• • Vti Since 1989 CIVIL LAND DEVELOPMENT TRAFFIC AND TRANSPORTATION KNIGHT-RIDDER SITE PARCEL 3 MULTI USE DEVELOPMENT SITE UTILITY STUDY NOVEMBER 2005 8550 W. FLAGLER STREET, SUITE 113, MIAM1, FLORIDA 33144 TEL: (305) 551-6267 • FAX: (305) 551-4542 E-mail: vsn©vsneng.com • • .rr.0 mnik INimiimiet amino11111111111 rya mil r Since 1989 CIVIL LAND DEVELOPhENT TRAFFIC AND TRANSPORTATION TABLE OF CONTENTS Page 1. General 3 2. Storm Drainage System 4 3. Water Distribution System 6 4. Sewer Collection System 7 5. Solid Waste Generation 9 EXHIBITS: „A" Location Map 11 "6" Storm Drainage Well Calculations 12 "C" MD-WASD Atlas (Sewer) 17 MD_WASD Atlas (Water) 18 Proposed Water Use Calculations 19 DERM Pump Station Monthly Report 20 "D" Solid Waste Generation Calculations 22 2 • rrrc IBM NIMI rrr► /10—" rr INIMIMIIIIIIII 1irr�r�s #fir/ 11111011Mrrrir rr� @ �fC1 Since 1989 CIVIL LAND DEVELOPMENT TRAFFIC AND TRANSPORTATION KNIGHT-RIDDER SITE PARCEL 3- MULTI USE DEVELOPMENT SITE UTILITY STUDY 1. General A. Project Location and size: The proposed project consists of a Multi -use Facility to be constructed at an approximately 1.10 acre site in downtown Miami. The project limits are: to the west Herald Plaza (NE Bayshore Place) to the north NE 15th Street to the east Biscayne Bay to the south Existing Miami Herald Building The property consists of a tract of land adjacent to the existing Miami Herald Building. The property being in Section 31, Township 53 South, Range 42 East, Miami -Dade County, Florida. B. Existing Conditions: This property in its existing conditions is being used as a parking lot. C. The proposed project build -out will be as follows Condominium Apartments Retail 554 Units 4,324 sf 3 Since 1989 2. Storm Drainage System CIVIL LAND DEVELOPMENT TRAFFIC AND TRANSPORTATION A. Existing Storm Drainage System: Roadway storm drainage systems presently exist along the streets surrounding the proposed project. These systems are owned and maintained by the City of Miami. The site, in its existing or proposed conditions, does not or will not contribute any significant amount of storm water run-off into the Public Roadway System. No significant improvements to the existing Roadway Drainage System are expected as a result of this project. B. Proposed On -Site Storm Drainage System: The proposed storm drainage system to serve this project will be designed to fully contain on -site the storm water run-off and to meet the Miami - Dade County Department of Environmental Resources Management (DERM) requirements. This will be accomplished by means of deep drainage wells. No off- site run-off will be generated from this project. The total contributing site area and 30% of the building wall area exposed to the rain will be included in the Disposal Well System design calculations. An impervious coefficient of 0.95 will be used for the purpose of this study. Based on information provided by an experienced well drilling company for other projects in the vicinity, an approximate well discharge rate 750 gpm per foot of head can be expected. Storm water from roofs, internal driveways, walkways and parking areas will be conveyed by means of a collection system to sediment tanks sized to meet the detention volume requirements prior to discharging into the Well System. Additional Water Quality pre-treatment and Pollution Retardant Baffles at the catch basins will be provided at areas subject to vehicle traffic. • 4 ® ® CIVIL LAND DEVELOPMENT TRAFFIC AND TRANSPORTATION C. Required number of Wells: The proposed wells will be designed to maintain the site dry during the 5 year-24 hour storm, to keep flooding below the perimeter grades during the 25 year-3 day storm and to keep flooding below the minimum floor elevation during the 100 year- 3 day storm. Based on the attached calculations, a total of three (3) — 24" diameter storm drainage wells are required to provide full on -site retention for this project depending on the actual yields obtained during the well drilling operations. For Well Disposal System calculations refer to attached Exhibit "B". • • 5 nig Since 1989 CIVIL LAND DEVELOPMENT TRAFFIC AND TRANSPORTATION 3. Water Distribution System A. Existing Water System Facilities: Miami -Dade Water & Sewer Department (MD-WASD) owns and operates the following domestic water facilities in the vicinity of this project: • An existing 24-inch water main on NE 15th Street that runs along the entire northerly boundary of the project. • An existing 12-inch water main on Herald Plaza that run along the entire westerly boundary of the project. These existing water mains can be used to provide fire protection domestic and landscape irrigation service for this project. The existing water distribution system in the vicinity of this project will have to be evaluated by the MD -WASP lnfill Committee to determine if additional extensions or contributions are required. That will be done at the time of permitting. B. Required Water System Improvements: Based on the records provided by Miami -Dade Water and Sewer Department (MD-WASD) the existing water mains appear to be adequate to support the proposed development. MD-WASD Infill Committee will make an evaluation of the system and may require additional system improvements. This will be determined during final design. C. Anticipated water use: The water use requirements for this project are calculated based on the build -out information previously described. An anticipated flow demand of 111,016 GPD is expected from this project. For determination of anticipated flows see Exhibit "C". • 6 • g�b trO Since 1989 CIVIL LAND DEVELOPWENT TRAFFIC AND TRANSPORTATION 4. Sewer Collection System A. Existing Sanitary Sewer System Facilities: Miami -Dade Water & Sewer Department (MD-WASD) owns and operates the following sanitary sewer facilities in the vicinity of this project: • An existing 10-inch gravity sewer line on NE 15th Street that runs along the entire northerly boundary of the project. • An existing 10-inch sanitary sewer force main along NE 15th Street that runs along the entire northerly boundary of the project. • An existing 10-inch gravity sewer line along Herald Plaza that runs along a portion of the Westerly boundary of the project. This line connects to an existing 12-inch gravity line that runs west along NE 14th Street. These lines collect all the sanitary flows from the general area and direct them to MD-WASD Pump Station # 30-002 B. Required Sanitary Sewer System requirements: Based on the records provided by Miami -Dade Water and Sewer Department (MD-WASD) the existing sewer mains appear to be adequate to support the proposed development. No additional sanitary system improvements are expected. The Sanitary Sewer System in the vicinity of this project will have to be evaluated by the MD-WASD to determine if additional extensions may be required. That will be done at the time of permitting. 7 • I It 2 6 in 6 QIn Since 1989 CIVIL LAND DEVELOPMENT TRAFFIC AND TRANSPORTATION C. Transmission Capacity Requirements The Wastewater generated by this project will be conveyed to MD-WASD Regional Pump Station No. 30-002. This is a major station with a yearly NAPOT of 4.65 hours per day as of November 2005 according to DERM. (See Exhibit "C"). The impact of this project on the ET of this station is 0.08 hours. The expected ET will be 4.73 hours which is less than the allowed 10 hours. Pump Station No. 30-002 at this time has sufficient available capacity to support this project. 8 • • • Cl l7 *M*NMIIMEMOIN1 MIIIMMINIMINIMIN MOM JP"OMMIPMPIMIN rM rw+rr.111B 6in6' @k@ Since .1989 CIVIL LAND DEVELOPMENT TRAFFIC AND TRANSPORTATION 5. Solid Waste Generation A. Solid Waste Generated by this project will be collected in standardized on - site containers for refuse and re-cyclables. Either hauling companies and/or the City of Miami Solid Waste Department will provide regular pick- up services. The anticipated daily solid waste generation for this project is 16 CY per day. (See Appendix "D"). 9 L�1 r 6 Since 1989 • • CIVIL LAND DEVELOPVENT TRAFFIC AND TRANSPORTATION EXHIBIT "A" LOCATION PLAN 10 • • h, E. 1 R -1s5 i fia t if 16Tii 811 ZE1 1 NJ. 1711 11-1 T LOCATION SKETCH NOT TO SCALE PROJECT LOCATION ro z 0 co 11 rrr1111111+ wry 111111111111ww11IMO - r = MIMES 111111111111MINI i S IIIIMMIIIIIIIIIIIII OM C tit g n P g t W Since 1989 CIVIL LAND DEVELOPMENT TRAFFIC AND TRANSPORTATION EXHIBIT "B" Storm Drainage Calculations 12 ■•• Ct f7 rrrrrrrEIMINI • • 0 1' nig Since 1989 PROJECT NAME DRAINAGE AREA: CIVIL LAND DEVELOPMENT TRAFFIC AND TRANSPORTATION KNIGHT-RIDDER PARCEL 3 1012112005 ENTIRE SITE Page 1 SITE DATA: SITE AREA = 1.10 ACRES BUILDING FOOT PRINT = 300 FT BUILDING HIGHT = 650 FT BUILDING WALL AREA = 4,48 ACRES CONTRIBUTING BUILDING AREA = 1.34 ACRES CONTRIBUTING AREA = 2.44 ACRES NUMBER OF WELLS = 3 REQUIRED VOLUME FOR 90 SEC. DETENTION TIME (PER WELL): CONTRIBUTING AREA PER WELL = 0.81 ACRES RAINFALL INTENSITY (90 SEC) = 6.4 IN/HR RUN OFF VOLUME (90 SEC) = 422 CF DETENTION VOLUME PROVIDED: TANK LENGTH = 16.00 FT TANK WIDTH = 7.00 FT TANK BOTTOM ELEV = -2.50 NGVD TOP OF WELL CASING ELEV = 2.50 NGVD STORAGE DEPTH = 5.00 FT DETENTION VOL PROVIDED = (per well) 560 CF TOTAL DETENTION VOLUME = 1,680 CF 13 mom jr----MMOMMINIMII 1111101111111111111111 110111011111110MIN 7 PROJECT NAME DRAINAGE AREA: Since 1989 CIVIL LAND DEVELOPMENT TRAFFIC AND TRANSPORTATION KNIGHT-RIDDER PARCEL 3 10/21/2005 ENTIRE SITE Page 2 DRAINAGE WELL DATA: WELL DIAMETER = WELL DISCHARGE RATE PER FT OF HEAD = AVAILABLE HEAD DISCHARGE RATE PER WELL = CUMULATIVE INFLOW/OUTFLOW DATA: STORM FREQUENCY = C FACTOR DRAINAGE AREA = # OF WELLS PROVIDED TOTAL DISCHARGE RATE = TOTAL DISCHARGE RATE = SEDIMENT TANK STORAGE = F.D. STORAGE = SOLID PIPE STORAGE = INFLOW-EXFILTRATION TABLE 24 INCHES 750 GPM 3.00 FT 2,250 GPM 5 YEARS 0.95 2.44 ACRES 3 6,750 GPM 15.04 CFS 1,680 CF 0 CF 0 CF TIME MIN INTEN. INIHR CUM.INFLOW CF SYST. STO. CF ADJ. INFL. CF WELL DISCH, CF OVERFLOW CFS 8 6.41 7137 1680 5457 7219 -3.67 10 6.17 8590 1680 6910 9024 -3.52 15 5.64 11789 1680 10109 13536 -3.81 20 5.20 14487 1680 12807 18048 -4.37 30 4.50 18785 1680 17105 27072 -5.54 40 3.96 22058 1680 20378 36096 -6.55 60 3.20 26711 1680 25031 54144 -8.09 90 2.48 31083 1680 29403 81217 -9.60 120 2.03 33853 1680 32173 108289 -10.57 150 1.71 35766 1680 34086 135361 -11.25 180 1.48 37166 1680 35486 162433 -11.75 14 • 180000 160000 140000 120000 U 100000 w 2 p 80000 60000 40000 20000 0 CUMULATIVE INFLOW-EXFILTRATION / WELL DISCHARGE / /� X / / / / CUMULATIVE IMF' OW /� /4 0 20 40 60 80 100 TIME (MIN) 120 140 160 180 200 LTI • • • r.a AIMINNIPIMMONIPM WM IIIMMNIONNININNI r-w� w M — IMINIMINIII Matil OM iMMII NM 11•1111 MI (ID ih1 Since 1989 CIVIL LAND DEVELOPMENT TRAFFIC AND TRANSPORTATION EXHIBIT "C" MD-WASD Sewer Atlas MD-WASD Water Atlas Proposed Water Use Calculations DERM Pump Station 30-002 Status 16 • "" --1(3'-i72r7-7-171 ) ___, - ) I '1-/ 4.6_47-ii .. 122 HOPE F • 1 0 F Zi • 73 --:11 3739 - UTH .17'?"141-43V4,41, PROJECT LOCATION RiGI-171-0F771V.21Y.L11,-!:E L,L •••••••::. t:10P1,%F.kTVI..111 MD-WASD SEWER ATLAS 1 7 • 2R NE14ST (760 246 rc 9 835 )" 'V E N T U R t I `\ METER 222 PROJECT LOCATION I t[ D -III AS D WATER ATLAS • 18 • • nig i J i 6 Since 1989 CIVIL LAND DEVELOPfrNT TRAFFIC AND TRANSPORTATION PROPOSED WATER USE CALCULATIONS PROJECT PARCEL3 DATE: 10-Nov-05 TYPE OF BUILDING USE AREA RATE ADF [sf] [gpd/sf] [god] [units] [gpdiuni] PROPOSED FLOWS: Residential Condominiums 554 200 110,800 Retail 4,324 Q.05 216: SUB -TOTAL 1111 016 PREVIOUS FLOWS: SUB -TOTAL NET INCREASE: 111,016 19 • *2005110211183977*DEARMM ent. * M Stat Station Station Current Delta Projected R Type Owner Number ET (Hrs) ET (Hrs) ET (Hrs) Proposed Number of gallons (gpd): 109531 ****************************** OK A5RM+ 30 0002 AC 30 CD Downstream * This is not an official docum Stations ***************************** 4.65 0.08 4.73 1001.97 0.02 1001.99 20 nag I Since 1989 CIVIL LAND DEVELOPMENT TRAFFIC AND TRANSPORTATION EXHIBIT "D" Solid Waste Generation Calculations 21 �tl Since 1989 CIVIL LAND DEVELOPMENT TRAFFIC AND TRANSPORTATION PROPOSED SOLID WASTE CALCULATIONS PROJECT KNIGHT-RIDDER SITE- PARCEL 3 DATE: 10-Nov-05 TYPE OF BUILDING USE AREA/UNITS [sf] [seats] RATE [Ib/sfi [Ib/seat] SOLID WASTE GENERATED [lb] SOLID WASTE GENERATED [tons] PROPOSED BUILDING: APARTMENT UNITS 554 8 4,432 2.22 RETAIL 4,324 0.025 108 0.05 NET INCREASE: 4,540 2.27 ANTICIPATED SOLID WASTE VOLUME AT 7 CY PER TE 16 CY / DAY 22