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Home My WebLink AboutIII-3 Site Utility Studyobert F. Jackson, P.S.M. ark S. Johnson. P.S.M. Ronald A_ Fritz, P.S.M. ierre E Calvet, P_S.M. xornin M. Ibariuzea. P.S.M. ichaef J. Ailey, P.S.M. �CiZLLTcYZU - s>°ZC�i�C)Z oCLatE v ,IY2r. LAND SURVEYORS -ENGINEERS -LAND PLANNERS 3240 CORPORATE WAY - MIRAMAR, FLORIDA 33025 BROWARD PHONE: (954) 435-7010 DADE PHONE: (305) 852-7010 BROWARD FAX: (954) 438-3288 • DADE FAX: (305) 652-8284 WWW.SHISKIN.COM La Fayette Square Major Use Special Permit Site Utility Study .; y\Henna* J. NravasjP.E.#50635 Vi President EB#87) nri DADE OFFICE - 11941 S.W. 144TH STREET, MIAMI, FL 33186 • PHONE: (305) 233-9210 Alfonso C- Tollo, P.E., P_S_M. Ken W. Grace. P.E. Hernando J. Navas, P.E. Luis F. Leon, P.E. Alberto A. Mora, P.E. ARAFAEL\Projects\GATEHOUSE\].,A FAYETTE\Documents\La Fayette Square -Site Utility Study.doc Hernando J. Navas Page 7/25/2005 i 110 t La Fayette Square Site Utility Study Introduction La Fayette Square is a proposed 2.363 acres high density development that will be constructed in two phases. This site is situated along NE 79th Street between NE 1st Avenue and NE 2nd Avenue in the City of Miami, Florida. La Fayette Square Phase 1 will be composed of a 19 story 160 apartment tower and a 7.5 story parking garage. The total site area for this phase adds to 1.252 acres of land. Phase II will be composed of a 15 story 142 apartment tower, four townhouses and an addition to the phase l parking garage to compensate for the addition required parking. The total site area for phase to is 1.111 acres. I. Drainage Existing Drainage: The existing site is mostly paved. The drainage system serving this parcel is composed of a series of drainage inlets and exfiltration trenches. The inlet rim elevations range from approximately 7.5' NGVD to approximately 8.2' NGVD. The perimeter grade is fairly constant at about 8.0' NGVD. This site has very little above ground storage which gives the site the potential of overflowing into the adjacent right-of-way during above average storm events. Proposed Drainage: The proposed site is planned to be drained by the use of both exfiltration trenches and drainage wells. This drainage system will be sized to dispose the 5-Year stortn event as required by Miami -Dade County DERM. Additionally, the proposed design will meet and exceed Florida Department of Transportation (F-DOT) requirements for site adjacent to their right-of-way. F-DOT requires zero overflow into their right-of-way for the 100-Year 1-Hour storm event. We anticipate the use of two 24" diameter drainage wells and approximately 300 linear feet of exfiltration trench. II. Water Distribution Existing Water Mains: Miami -Dade Water & Sewer Department (M-DWASD) owns and operates the following water mains in the vicinity of the project. (See attached Water Atlas) LOCATION BETWEEN 1 DESCRIPTION NE 79th Street NE 1st Ave and NE 2nd Ave 16" Water Main NE 2n' Avenue NE 78th St. and NE 79th St. 10" Water Main NE 78t1, Street NE I st Ave and NE 2nd Ave 2" Water line NE Is' Avenue NE 78th St. and NE 79th St. 2" Water Line T:\RAFAEL'Projects\GATEHOUSELA FAYETTE\Doeuments\La Fayette Square -Site Utility Study.doc Hernando J. Navas Page 2 7/25/2005 i 1 1 1 La Fayette Square Site Utility Study Proposed Water Mains: Based on the above, we anticipate that a new 12" water main be required by Miami -Dade WASD. This proposed main will connect to the existing 10" water main located at the intersection of NE 78th Street and NE 21'd Avenue. This new main will run westward along NE 78th Street to NE 1st Street. where it will turn northward along said NE1" Avenue to NE 79t1' Street, where it will connect to the existing 16" water main running east to west along NE 79th Street. Water Demand: Phase I is expected to generate an average daily water demand of 32,000 gallons per day (g.p.d.) based on Miami -Dade Water & Sewer Department tables for this type of development (160 apts. X 200 g.p.d." 32,000 g.p.d.) Phase II is expected to generate an average daily water demand of 29,400 gallons per day (g.p.d.) [(142 apts. X 200 g.p.d. = 28,400 g.p.d. )+(4 townhouses X 250 g.p.d. 1,000 g.p.d.) = 29,400 g.p.d.] III. Sanitary Sewer Collection System Existing Sanitary Sewer Mains: Miami -Dade Water & Sewer Department (M- DWASD) owns and operates the following sanitary sewer mains in the vicinity of the project. (See attached Water Atlas) LOCATION BETWEEN DESCRIPTION NE 79th Street NE 1" Ave and NE 2nd Ave 15" Sanitary Gravity Main NE 2nd Avenue NE 78th St. and NE 7901 St. 10" Sanitary Gravity Main NE 78th Street NE 1st Ave and NE 2nd Ave 10" Sanitary Gravity Main NE 1 s1 Avenue NE 78t�St.Fand NE 79th St. 10" Sanitary Gravity Main Proposed Sanitary Sewer Mains: Based on the above, we do not anticipate the construction of any off -site mains. We plan to connect to the existing 10" gravity line along NE 78th Street with a new private main or service. There is a possibility that we may have to connect to the existing 15" gravity main along 79th Street. Please be advised that although the existing mains abutting this site seem to be adequate Miami -Dade Water & Sewer Department will model the loads generated by this development to ensure that there is enough capacity in the existing mains to serve this project. Sanitary Sewer Load: Please refer to the Water Demand Section for the calculations of the expected Sanitary Sewer Loads. The Sanitary Sewer Loads are as follows: Phase 1 will generate 32,000 g.p.d. Phase 1I will generate 29,400 g.p.d. Total Site will generate 61,400 g.p.d. 1 Hernando J. Navas T:'',RAFAEL'ProjectslGATEHOUSE\LA FAYETTE.Documents;La Fayette Square -Site Utility Study.doc Page 3 7125r2005 La Fayette Square Site Utility Study IV. Solid Waste Generation The Solid Waste that will be generated by Phase I of this development was calculated to be (156,053 Ft^2 X 41bs./100ft^2/day = 6,242 lbs./day) 6,242 lbs./day. The Solid Waste that will be generated by Phase II of this development was calculated to be (148,992 Ft^2 X 4 lbs./100ft^2/day = 5,960 lbs./day) 5,960 lbs./day. The solid waste that will be generated by this project will be collected in standard on -site containers. Pick-up service will be provided by either a private garbage collection company or by the City of Miami Solid Waste Department. V. Gas We do not anticipate a need for fuel gas at the referenced project, however, there is an existing 6" gas main along NW 78th Street. (Information provided by Initial Engineers) VI. Electrical We have made contact with Florida Power and Light, and their representative has informed us that 120/208 Volt, three phase service is available. The project will be served from either an outdoor pad mounted transformer or transfoiiiiers in an FPL vault inside the building. (Information provided by Initial Engineers) T:\RAFAEL'\.Projects\GATEHOUSE\LA FAYETTEDocunents'La Fayette Square -Site Utility Study.doc Hernando .1. Navas Page 4 7/25i2005 La Fayette Square Site Utility Study Appendix I T:\RAFAEL'',ProjectstGATEHOUSE'LA FAYETTE Docurents La Fayette Square -Site Utility Study.doe Hernando J. 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