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Home My WebLink AboutSite Utility Study• COASTAL SYS EMS 1� TE1t 1NA T 1UN AL Engineering Development Evaluation Report RESIDENTIAL DEVELOPMENT 850 NW 42nd Avenue City of Miami, Miami -Dade County, Florida Prepared for. ALLSTATE DEVELOPMENT 150 Alhambra Circle, Suite 1240 Coral Gables, FL 33134 By: COASTAL SYSTEMS INTERNATIONAL, INC. 464 South Dixie Highway • Coral Gables, Florida 33146 Tel: (305) 661-3655 • Fax: (305) 661-1914 State of Florida EB # 7087 TABLE OF CONTENTS PAGE 1.0 INTRODUCTION 1.1 Authorization 1 1.2 Purpose 1 1.3 Site Location 2 2.0 CODE REQUIREMENTS AND DEMANDS 2.1 Stormwater Management 2,2 Potable Water 2.3 Sanitary Sewer 3.0 MAPS 3.1 Water Main Atlas Map 3.2 Sewer Main Atlas Map 3.3 Regional Pump Station Report 3 3 4 5 6 7 Coastal Systems International, Inc. 1.0 INTRODUCTION 1.1 Authorization Coastal Systems International, Inc. (Coastal Systems) was authorized by Allstate Development (Client), to evaluate the existing domestic water, sanitary and storm drainage system for the proposed Condominium Development to be located on the existing Ocean Mazda site. 1.2 Purpose The purpose of this Development Evaluation is to evaluate potential impacts to the existing utilities as a result of the redevelopment of the site into a residential complex of 476 apartment units and some commercial retail space. 1.3 Site Location The project site is located at 850 N.W. 42nd Avenue (Le )eune Road), City of Miami, Florida. The property lies on a parcel of land between 42nd Avenue and 43'd Avenue and measures approximately 4.33 acres. The property is an existing commercial site for an automotive dealership. 7 Coastal Systems International, Inc. ♦ ""• "'� • • 2.0 CODE REQUIREMENTS AND DEMANDS 2.1 Stormwater Management The proposed site development should provide an increase of pervious areas to be planted with sod and trees. The storm water run off from the impervious areas must be collected and contained on the site by means of an exfiltration system. When greater rain events occur, the storm water overflow must be detained on site allowing no discharge into the adjacent properties. The proposed storm water management system will be designed according to Best Management Practices and will be consistent with the Miami -Dade County Department of Environmental Resource Management (DERM), Florida Department of Transportation (FDOT) drainage requirements, and South Florida Water Management District (SFWMD) guidelines and design criteria. 2.2 Potable Water The Water Mains are owned and operated by the Miami -Dade Water and Sewer Department. The site is currently serviced by a 12-inch water main, located on N.W. 42"d Avenue and a 8-inch water main on N.W. 43'd Avenue. There are two fire hydrants conveniently located to serve this development, one fire hydrant is located on the west sidewalk of 42nd Avenue and the other fire hydrant is located on the west sidewalk of 43'd Avenue. These hydrants should provide sufficient fire water supply to the site. Refer to the Map 3.1 Water Atlas. While the 8-inch and 12-inch water mains should provide sufficient capacity to the site, there is an increase of water demand required for the proposed development. Refer to Table 1. 2 Coastal Systems International, Inc. ar- • • Table I Daily Rate Gallonage for Water and Sewer 1. Proposed Usage a. 476 Apartment Units at 200 gpd 95,200 gpd b. 12,000 s.f. Retail (commercial) at 10 gpd/100 s.f. 1,200 gpd Total 96,400 gpd I1. Existing Usage a. 10,960 s.f._ Office warehouse at 10 gpd/100 s.f. 1,096 gpd The net total increase of water and sanitary daily gallonage for the proposed site development is 95,304 gallons per day (gpd). References: Miami -Dade County Average Daily Flow for Water and Sewage System. 2.3 Sanitary Sewer The Sanitary Sewer Mains are owned and operated by Miami -Dade Water and Sewer Department. The proposed site can be serviced by an existing 10-inch gravity sanitary main that runs along the centerline of N.W. 43rd Avenue. Refer to Map3.3 Sanitary Sewer Atlas. Refer to Table I for flow requirement. At this time the existing utility sewage pumping system does not provide sufficient capacity to service the increased flow demand required by the new development. The flows from the existing mains are received by MDWASD Regional Pump Station #112, which is located at 429 NW 47th Avenue. The report indicates that Pump Station #112 is operating at a yearly NAPO average of 8.49 hours per day, at an approximate capacity of 84.90%. The Pump Station is not presently under any moratorium, however MDWASAD has already allocated some additional flows for smaller projects that are under way. The MDWAD has acknowledges that improvements to the regional pumping system should be anticipated in order to allocate the additional sanitary collection required for this project. Refer to Map 3.3 Pump Station Report. F.Trojee.22451:101Rcport\(2003-i E-20) utilities Report -Mazda aitadoc 3 Coastal Systems International, Inc. 1 3.1 Water Main Atlas Map Coastal Systems International, Inc. • ''"'' 3.2 Sewer Main Atlas Map Nw11 ST :45 556 9 556 r 12 w10$7 9 10' 65 555 iv 10 0 53 64 rh 7361 —'_ , 8 + i 0 m WA r 10 QYfR 77'—� 1 21 -4 50 57°1 c a S r NW 8 TER 4w -- 556 ". 13 56 4 16 4A 556 11 44 70 7- 2 556 i 10 • • 75 4 •W DYER 7362 i 7361 8 f_FG +~a' one �'" t 0' _i 53 60 54 7381 A 556 49 147 THIS PROJECT 45 9 $2 496E 1.0 . 83 4964 3 84 5045 0 53 52 5045 17 15045 10 5045 17 5045 I 58 17 5046 i 15 AS I504 5 11 di OI i▪ s �3 � :3164. 67 1 .6 1E1 135.154 4949 4949 • 2 1 Coastal Systems International, Inc. 40r'"" i 3.3 Regional Pump Station Report Pump Station Monthly Information Station.,30 -0112 Atlas Pg..K14 MIAMI LADE WATER & SEWER DEPARTMENT Addr..429 NW 47 AVE Sec -Township -Range 5-54-41 Genr._ ET clock.Y Telm.Y #Pumps.. 2 Pump Type.B Stn Class.L Speed.2 Hrspwr.+ Res flow(gpd) Plans.. 74,482 Plats.. 0_ Extens. 0 Proj Napot 8.86 hrs 8.49 hrs 8.49 hrs 96 Cap 88.60 84.90 84.90 Date 10/03/2003 09/04/2003 08/05/2003 07/07/2003 06/05/2003 05/06/2003 04/07/2003 ady . Mo.NAPOT Avg Daily Flows 8.16 7.24 6.53 8.42 10.44 11.10 8.16 7.24 6.53 8.42 0.00 0.00 0.00 0.00 10.44 0.00 11.10 0.00 9,68 9.68 0.00 Signature..LEZCAF Pump Information Pump Station....30 -0112 Description MAIN PUMP #1 Manufacturer....ALLIS CHALMERS Model Number....250 F7C2 Equipment Type..NSWV <Plan Review Moratori urn . . 0 Moratorium effective since 06/19/1996 Yearly NAPOT (hrs) Stn Gross Capacity(gpd).. Station Reduction Factor Stn Net Cap Certif(gpd) Stn Net Capacity(gpd) Indicated Flows(gpd) 8.49 4,896,000 1 .00 fl 4,896,000 1,731,960 Rgd # Fig Pmp Y 2 Y 2 Y 2 Y 2 Y 2 Comments Y 2 Y 2 Sign Date..02/29/2000 Impell Size (in/#/mm)...19.875 TDH (ft.) 75 Pump Capacity (gpm) 3400 Speed (rpm) 880 Motor HP (hp) 100.0 GOLD/G Codes & Cate<g>ories 10:07:33 25 <Plan Review>