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HomeMy WebLinkAboutIII. Tab 3. Site Utility Study'D m SO 0 tPrepared By: A.B.A. ENGINEERING, IN Consulting Engineers and Planners 8850 NW 33rd Street, Suite 101, Doral, Florida 33122 1 Phone (305) 551-4608 - Fax (305) 551-8977 www.adaengineering.com - EB # 00003212 1-395 PROPOSED MIAMI SCIENCE MUSEUM SITE i B.M. Rubel Siddique, PE Civil Engineer, PE# 67239 MAJOR USE SPECIAL PERMIT (MUSP) MIAMI SCIENCE MUSEUM 1075 BISCAYNE BLVD., MIAMI, FLORIDA 33132 SITE UTILITY STUDY Prepared For: MIAMI SCIENCE MUSEUM 3280 South Miami Avenue Miami, FL 33129 Prepared By., EL Corporate Office 8550 NW 33`d Street, Suite 101 Doral, Florida 33122 T 305.551.4608 F 305.551.8977 www.adaengineering.com March 26, 2010 J1LA.D.A. Engineering, Inc. 1 of 9 Miami Science Museumrwa I. INTRODUCTION The proposed Miami Science Museum (MSM) will be constructed on the northwest portion of the Museum Park Property, bounded to the north by Bicentennial Park Access Drive (Museum Drive south of 1-395) and west of Biscayne Bay. The 29 -acre Museum Park is owned by City of Miami and is located at 1075 Biscayne Blvd, Miami, FL 33132. Museum Park will house not only the Miami Science Museum, but also the Miami Art Museum. This new highly sustainable facility will include a planetarium, aquarium, both indoor and outdoor flexible space for science exhibits as well as educational facilities. The MAM will be a six (6) story structure with the ground level being used for parking. The largest footprint of a floor plan is approximately 55,000 sq. ft. and the roof is approximately 70,000 sq. ft. The lowest constructed elevation will be at parking level at +9'-10" NGVD. The first floor of the museum will be the plaza level constructed at elevation +21'-10" NGVD. The site has been previously developed in the past but is presently an open area. Representatives from our office have visited the site and have spoken with the staff of the various local municipal agencies to obtain procedures/requirements associated with land development. The Engineer has also researched and obtained readily available utility information related to the site. Permits for site work, demolition and building must be obtained from City of Miami. Stormwater Management permitting will require approval from the City of Miami Department of Public Works, and Miami -Dade County Department of Environmental Resources Management (DERM), Water Control Section. Utility plans will have to be submitted and reviewed by Miami -Dade Water and Sewer Department, Department of Environmental Resources Management (DERM) and the Department of Health. II. GENERAL Public water, sewer, storm drainage, electric and telephone utilities were observed within the surrounding streets. The following agencies and companies control these utilities: Water and Sewer: Miami -Dade Water and Sewer Department M!© Phillip Torres, P.E., Head -Plans Review Section (786) 268-5214 Fire Protection: City of Miami Fire Department Lt. Jose E. Paz, Water Supply Officer 0", (305) 416-1679 ALA.D.A. Engineering, Inc. 2 of 9 Miami Science Museum sa Storm Water: City of Miami Public Works Department Len Helmers, City Engineer `>= (305) 416-1221 _ Miami -Dade County Department of Environment Resources Management (DERM) Camilo P. Ignacio, Engineer -Water Control Section (305) 372-6681 Saltwater Intake: South Florida Water Management Districtt Barbara J. Conmy, Section Leader (561) 682-6937 Electric: Florida Power and Light Jorge Ensenat (305) 377-6016 FPL Telephone: III. WATER DISTRIBUTION AND FIRE PROTECTI The Miami -Dade Water and Sewer Department (MDWASAD) own and operate existing 36" and 24" water mains located in the right-of-way of 1-395 and Biscayne Blvd respectively. The City of Miami Fire Department has conducted a fire flow test to the existing 24" WM in Biscayne on 09-02-09. The test result shows that the 24" WM have available flow of 9895 gpm at 20 psi. The available static pressure is 57 psi and residual pressure is 55 psi. There is an existing twelve (12) inch stub -out from the 36" water main close to the northern boundary of the Miami Art Museum property. MDWASAD recommends this 12" stub -out as the point of connection for the proposed 12" WM. MDWASAD also recommends that any public WM extension within the property shall be twelve (12) -in. min. in diameter. If two or more fire hydrants are connected to a public water main extension within the property, then the water system shall be looped with ALA.D.A. Engineering, Inc. 3 of 9 Miami Science Museum gq AT&T Harold J. Elosegui 305-260-8241 at&t Gas: TECO Peoples Gas `TE Juan Llarena P�OPLCB 6A® (786) 412-9821 III. WATER DISTRIBUTION AND FIRE PROTECTI The Miami -Dade Water and Sewer Department (MDWASAD) own and operate existing 36" and 24" water mains located in the right-of-way of 1-395 and Biscayne Blvd respectively. The City of Miami Fire Department has conducted a fire flow test to the existing 24" WM in Biscayne on 09-02-09. The test result shows that the 24" WM have available flow of 9895 gpm at 20 psi. The available static pressure is 57 psi and residual pressure is 55 psi. There is an existing twelve (12) inch stub -out from the 36" water main close to the northern boundary of the Miami Art Museum property. MDWASAD recommends this 12" stub -out as the point of connection for the proposed 12" WM. MDWASAD also recommends that any public WM extension within the property shall be twelve (12) -in. min. in diameter. If two or more fire hydrants are connected to a public water main extension within the property, then the water system shall be looped with ALA.D.A. Engineering, Inc. 3 of 9 Miami Science Museum gq two (2) points of connection. The other point of connection will be handled by the Museum Park and their stub -out will be used as the second point of connection. Based on the assumption that the Miami Art Museum will be first in construction and will provide water -sewer stub -outs for the future science museum, there will be no new construction of Water Mains, but only service lines with associated meters and valves. We have conducted a preliminary review of the sewer demands for the Miami Science Museum and how they might affect the existing infrastructure. We have prepared this analysis using the Science Museum demands provided by Syska for the worst case scenario (i.e. rainwater and greywater systems are not operational). The estimated demands provided were: Building Water Use (Plumbing, HVAC make-up & LSS) = 56,000 GPD (provided by Syska). IV. SANITARY SEWER COLLECTION SYSTEM The Miami -Dade County Water and Sewer Department (MDWASAD) is currently responsible for providing sanitary sewer service to this project area. There is an existing 10" gravity sewer main in the project area north of the existing pump station. The location and size of this gravity pipe was confirmed during a site visit along with Javier Pantin (786-268-5541) of MDWASaD. A video inspection was done on 06-09-08 to evaluate the internal surface condition and for any possible connections. After inspection MDWASAD recommended to use this existing 10" sewer pipe by adding liner inside the pipe. But the recent meeting with MDWASAD suggested to replace that existing 10" pipe that is connected to the Biscayne Blvd Sewer system. Refer to attachment B for sanitary sewer atlas. The point of connection is subject to an engineering analysis by MDWASAD during the water and sewer agreement process. It is important to note that improvements to the existing sewage pump stations receiving flow from this project may be required based upon the sewage flows discharged by this project. The proposed wastewater collection system consists of construction of 10" pipe, which will be connected to the Park's proposed manhole at NE 11th Street. At the assumed design flow the sewers capacity and velocity are acceptable for a 10" pipe. The depth ratio of 0.75 will be used to select the pipe size as per the Ten States Standards. The proposed manhole by the Museum Park is deep enough to connect our system without putting any sanitary lift station. The whole stormwater collection system will be a gravity system. It was recommended by Mr. Phillip Torres that we should design a combined system along with Museum Park and Science Museum. The sewer system must be public since A.D.A. Engineering, Inc. 4 of 9 Miami Science Museum there are three different users in this whole park area. C-900 PVC pipe should be used in contaminated areas if any. The preliminary sewer demand for the Science Museum is stated below: Domestic = 29,000 GPD HVAC Blowdown = 8,040 GPD (provided by Syska) LSS Backwash: Max. Backwash Period: 5 minutes 25,008 GPD (once a week) 16,628 GPD (5 days a week) Max. Backwash Period: 3 minutes 15,004 GPD (once a week) 9,976 GPD (5 days a week) So, the total sewer demand for the Science museum is as follows: Max. Backwash Period: 5 minutes 75,828 GPD (once a week) 67,448 GPD (5 days a week) Max. Backwash Period: 3 minutes 65,824 GPD (once a week) 60,796 GPD (5 days a week) If synthetic seawater is used for LSS exhibits in lieu of natural seawater, then the domestic water use could increase by as much as 10,000 gallons per day. V. STORM WATER MANAGEMENT SYSTEM - DRAINAG The proposed Miami Science Museum stormwater management system will not be connected to the city or FDOT drainage system, instead it will be an isolated one. As per DERM criteria, Design storms with 5 -year return periods are required in the design of residential and commercial stormwater-management systems, and full onsite retention of design storm runoff is required if at all possible (Miami -Dade Department of Environmental Resources Management, 1980). The implication of this requirement is that the stormwater-management system must be capable of accepting runoff from 5 - year storms of any duration. The Design Storm Event for Miami Science Museum will be 10 -year, 24-hour, which will meet the above mentioned DERM design criteria with factor of safety. A\ A.D.A. Engineering, Inc. 5 of 9 Miami Science Museum There are seven different sources of stormwater collection area: Non -Vegetated Roof: Runoff from non -vegetated roof can be classified as clean water. Stormwater collected from this roof will be stored in a cistern for HVAC make-up water. Vegetated Roof: Runoff this source is considered as non -clean water that will contain some nutrients and must be treated before infiltrating into the aquifer through drainage wells. Collected stormwater from this area will also be stored in a cistern for HVAC make-up water. Plaza Level Area: This water will also be considered as dirty water with possible presence of trash, oil, and grease. This water will be treated with a stormwater treatment system before discharging to the cistern and dry retention area in order to prevent floating oil and grease. Parking Level: This water will also be treated with a baffled structure in order to separate trash, oil and grease before discharging to the exfiltration trench. Water from this area will not be used for HVAC system. Other Area: This area consists of sidewalk and landscape area within the Science Museum Parcel in addition to the roof and plaza area. Water from this area will be collected through area drain and will be directed to exfiltration trench. Water from this area will not be used for HVAC system. Wall: 1/2 of the wall surface is also considered as the stormwater collection area as the building is multi -storied. Stormwater from the wall will collected through the perimeter area drains and will be directed to exfiltration trench. Water from this area will not be used for HVAC system. Parcel S-3: The amount of stormwater runoff from this area is minimal as the whole parcel is pervious. The runoff from this parcel will be collected in the dry retention area and any overflow will be directed to exfiltration trench and finally to the drainage wells. Water from this area will not be used for HVAC system. Below is the results of the preliminary stormwater calculations. Table 1: Stormwater collection area and runoff AL A.D.A. Engineering, Inc. 6 of 9 Miami Science Museum nlia W AREA AND RUNOFF DATA PARCEL S-1 PARCEL S-3 MSM PLAZA VEGETATEDROOF NON -VEGETATED + OPENAREA 112 OF WALL TOTAL PERVIOUSAREA ROOF MUSEUM PLAZA AREA. 12,000 SF AREA: 65,327 SF AREA:42,839 SF AREA:10,710 SF AREA: 27,144 SF AREA:159,920 SF AREA:19,166 SF RUNOFF:1.36 CFS RUNOFF: 9.41 CFS RUNOFF: 6.27 CFS RUNOFF: LSOCFS RUNOFF: 3.89 CFS RUNOFF:22.43 CFS RUNOFF: 0.87 CF5 0.21 AC -FT 1.11 AC -FT 0.75 AC -Fr 0.18 AC -FT 0.46 AC -FT 2.71 AC -FT 0.12 AC -Fr 68,429 GAL 361,695 GAL. 244,388 GAL. 58,653 GAL 149,892 GAL. 883,057 GAL 39,102 GAL AL A.D.A. Engineering, Inc. 6 of 9 Miami Science Museum nlia W VI. SOLID WASTE GENERATION Solid waste generated by this project will be collected in standard on-site containers for refuse and recyclables. The volume of solid waste projected to be generated by the project is shown below: Proposed Useable Space = 195,000 SF Waste Generation rate = 4 lbs/100 square feet/day Total projected solid waste = 195,000 x 4/100 = 7,800 lbs per day. These containers shall comply with the applicable City of Miami codes. Additionally, the solid waste shall be transported to Miami -Dade County Solid Waste Disposal facilities via regular pick-up service by the City of Miami Solid Waste Department or private hauling companies. VII. ELECTRIC Florida Power and Light is the service provider for this area. Per Seyed Hajassadollah, P.E. @ (305) 228-5290 FP&L has no underground transmission lines within the Miami Science Museum's construction area. Existing facilities may or may not be sized to service proposed building improvements. Owner, MEP Engineer shall be required to contact FP&L directly to coordinate loads and distribution systems. VIII. TELEPHONE AT&T is the service provider for this area. Per Gus VandenBosche of E.R. Brownell & Associates, Inc. @ 305-446-3511, AT&T has underground utilities in the proposed areas of development. Actual location to be field verified. Future correspondence should be done with Harold J. Elosegui @ 305-260-8241. AT&T has overhead lines near the proposed MSM site. Existing facilities may or may not be sized to service proposed building improvements. Owner, MEP Engineer shall be required to contact Bellsouth/AT&T directly to coordinate loads and distribution systems. A.D.A. Engineering, Inc. 7 of 9 Miami Science Museum C l a k3ba-9 2�AV ir j 7 1 . -; ME 2 a cc 9 VH a , Vl: iiw- jtf Point of Connection -2 j N BAYSH - -21 cc ay Point of Connection -I Water Atlas ga AL A.D.A. Engineering, Inc. 8 of Miami Science Museum SQ.. ATTACHMENT - B A Z:; Existing 10" VCP gravity Approximate Point sewer verified by field observation and by video of Connection. done by WASD UT VA r? 00 00 '7 (e Sewer Atlas AL A.D.A. Engineering, Inc. 9 of 9 Miami Science Museum mia SCI.-