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HomeMy WebLinkAbout2007-06-23 Strategic Planning Session City Commission Meeting Minutes MINUTES OF STRATEGIC PLANNING SESSION DANIA BEACH CITY COMMISSION SATURDAY, JUNE 23, 2007 — 9:00 A.M. 1. Call to Order Mayor Anton called the meeting to order at 9:00 a.m. Present: Mayor: Bob Anton Vice-Mayor: Albert Jones Commissioners: John Bertino Anne Castro Patricia Flury City Manager: Ivan Pato City Attorney: Thomas Ansbro City Clerk: Louise Stilson Also Present: Colin Donnelly, Assistant City Manager Patricia Varney, Finance Director Nicki Satterfield, Assistant Finance Director Ben Rudbeck, Division Chief, Dania Beach Fire Department Laurence Leeds, Director of Community Development Kristen Jones, Director of Parks and Recreation Dominic Orlando, Director of Public Services Mary McDonald, Director of Human Resources/Risk Management 2. Discussion and possible direction by Commission to staff in order to prepare the ensuing year's budget City Manager Pato started the meeting with a PowerPoint presentation which is attached to and incorporated into these minutes. Finance Director Varney clarified that we need to cut our budget by $1.53M. Commissioners Castro and Flury noted they would not support increased fees for residents. Vice-Mayor Jones did not see a need to make hasty decisions on this year's budget. He stated he is not in favor of increasing fees. Commissioner Bertino commented we have overages and we can absorb the $1.53M. He also does not want to increase fees for the homeowners, but he is receptive to increases in other fees, such as new permit fees. Commissioner Castro recommended a workshop on Capital Projects and Capital Improvements. Mayor Anton commented we have a significant reserve fund which he would like to keep. Finance Director Varney presented a PowerPoint on Capital Projects which is attached to and incorporated into these minutes. The Commission asked for information on the use of impact fees for construction of the Public Services facility. City Attorney Ansbro responded he would research the question and have the information available at the July 24 Budget Workshop. Commissioner Flury commented on the lack of grant funds in the upcoming budget. She requested bid quotes for a retaining wall at the beach. Mayor Anton questioned the need for a third Community Center in the northwest area, when there are other areas of the City that do not have any. Commissioner Castro requested a list of fleet vehicles. Commissioner Bertino suggested using a Grant Writer to obtain grants for the City. Vice-Mayor Jones would like to see the SW Community Center materialize. Finance Director Varney presented a PowerPoint for the Finance Department which is attached to and incorporated into these minutes. She suggested placing the solid waste collection fee on the tax bill of the residents on the east side of the City, as is the process in the west side of the City. Director Varney advised that the GASB 45 liability for retiree insurance beginning in 2009 will be $1.5M. Kristen Jones, Director of Parks and Recreation, presented a PowerPoint which is attached to and incorporated into these minutes. , Ben Rudbeck, Division Chief, Dania Beach Fire Department, presented a PowerPoint which is attached to and incorporated into these minutes. Donn Peterson, BSO District Il Chief, noted that the reduction of BSO clerical positions would result in reduced hours of walkup and window service. He noted there are currently three vacant deputy positions in the Department. Chief Peterson recommended a Commercial Vehicle Inspection Officer to replace the Canine Officer position because the drug dog retired this year. The Commission requested a list of staffing for the Sheriff's Office, including call volume and window volume, and calls for service. Mary McDonald, Director of Human Resources and Risk Management, presented a PowerPoint which is attached to and incorporated into these minutes. Minutes of Strategic Planning Session 2 Dania Beach City Commission Saturday, June 23,2007—9:00 a.m. Colin Donnelly, Assistant City Manager, noted the Code Division has one vacant Code Officer and clerical position. He also noted that we have Saturday enforcement. The Commission discussed the issues facing the City such as three different Zoning Codes, Saturday enforcement, resident education, and automation processes. They also discussed the length of time it takes for compliance and the possibility of shortening the process. Laurence Leeds, Director of Community Development, presented a brief PowerPoint which is attached to and incorporated into these minutes. He noted that he is requesting an increase in Building Permit Fees because they have not been increased in more than 15 years. He noted that our fees are currently in the lowest percentile for cities in Broward County. The Commission clarified that the $200,000 for the Citywide Zoning Code is not to be reduced to $100,000. City Manager Pato asked for direction for the budget preparation. Mayor Anton clarified we are not cutting public safety; we are lifting the hiring freeze, provided they are imperative positions; we are going to review the need of the NW Community Center; we need an estimate for the retaining wall at the beach; we need to review the cost for the dugout; we need to make a recommendation on the surplus this year, as to whether we pay existing debt or replace money we would have borrowed in the upcoming year; we need to provide a list of Citywide fleet numbers; we need to show the actual savings of outsourcing the Beach Lifeguards; and we need to find money for the SW Community Center. Commissioner Bertino confirmed that we need an analysis of positions. Commissioner Flury asked for a plan to upgrade the Marina. 3. Discussion and update on the Public Services Complex and Infrastructure Projects Dominic Orlando, Director of Public Services, presented a list of projects that will be completed within 30 days, excluding the water tank which should be completed in 4 months. He noted the gasoline and diesel storage tanks need to be moved as part of the design of the new plant. Director Orlando noted the plan is included in the report the City Manager previously distributed to the Commission, which is attached to and incorporated into these minutes. Director Orlando presented drawings of the existing site, and explained how the site will be redeveloped. He noted that the Pilot Study currently being conducted will ensure we use the proper water filtration system. Director Orlando advised that there would be several items on the upcoming City Commission agenda for this project. Commissioner Flury pointed out that the two projects the citizens did not approve, City Hall and Public Services Compound, are moving along while the projects the citizens approved are not moving forward. Minutes of Strategic Planning Session 3 Dania Beach City Commission Saturday,June 23,2007—9:00 a.m. Director Orlando stressed the importance of moving forward with the Public Services Complex. He pointed out that we will soon start working on two of the projects suggested by the Neighborhood Improvements Advisory Board: Solar Lighting and the Sidewalk Program. Mayor Anton opened the meeting to the public. Joe Van Eton, 1501 SW 2nd Avenue, reminded the Commission that businesses need consideration as well as residents. He does not think the City is overstaffed. Mr. Van Eton commented that Economic Development funds should not be cut because we need to promote what we have. He suggested we revisit the location for the SW Community Center. Mr. Van Eton agreed that we should consult with a Grants company. Kurt Ely, 245 SW 1st Avenue, commented there are still two unknowns: 1) what is the value of property, and 2) until we hear from the Department of Revenue, we will not know what the final number is to cut from the budget. He commented that we have a Commission of fair-minded good thinking people. Mr. Ely also noted that this is the best City staff that he has seen for a long time, and that we all need to work together to find the best solution. 4. S.E. Traffic Calming—Timetable and Funding Options Dominic Orlando, Director of Public Services, presented a memorandum from Kimley-Horn and Associates, dated May 15, 2007. The report showed the recommended traffic calming plan and phasing, based on the preferences selected by the community, discussions held with City staff, input from the Focus Group and direction from the City Commission. City Manager Pato indicated funding for these projects will be derived from the Three Cent Gas Tax. He advised the traffic calming concept had been divided into three focus areas: 1) Stirling Road and SE 2"d Street 2) SE 5th Avenue Corridor 3) The southeast neighborhood (between Federal Highway, SE 51h Avenue, East Dania Beach Boulevard and Sheridan Street) City Manager Pato suggested moving forward with the above three areas simultaneously. He asked the Commission for direction to prioritize the projects. Mayor Anton would like to proceed with Phase IA (southeast neighborhood, Dania Beach Boulevard south to SE 3`d Terrace). We would then have to reevaluate the rest to determine our next move. Director Orlando noted we currently have one consultant for continuing engineering services. He would like to go out to bid to hire another consultant for the southeast section. Minutes of Strategic Planning Session 4 Dania Beach City Commission Saturday, June 23, 2007—9:00 a.m. Commissioner Castro thought this decision had already been made and the remaining concern was the funding. Patricia Varney, Director of Finance, advised that we currently have $1.346M available in the Three Cent Gas Tax Fund. She further noted that once we use this money for these projects, the funds will be totally exhausted. City Manager Pato indicated his suggestion was to proceed with the SE 2nd Street and Federal Highway, SE 5`h Avenue and the portion of Winn Dixie. Mayor Anton and Commissioner Flury both concurred that we need to proceed according to the phases. Mayor Anton felt we should hold off on the 5th Avenue Corridor. He explained he had already spoken with FP&L and they have shown an interest in doing something on the 5th Avenue area. Commissioner Bertino suggested doing everything excluding the immediate work to be done on 5ch Avenue, as recommended by Mayor Anton, while we try to negotiate with Florida Power & Light. Director Orlando commented the SE 5`h Avenue drainage study currently being conducted will definitely impact the Linear Park. Vice-Mayor Jones would like to make sure these are the traffic calming measures we want, before we spend too much money. Commissioner Castro suggested tying in the Linear Park with the SE 5d' Avenue improvements project in order to save funds. Director Orlando thought it would be better to do them separately because our stormwater timetable is still uncertain. He further noted that he has not yet received the report from Calvin Giordano & Associates, which is two years overdue. Commissioner Flury agreed with Phases 1A and 1B. She would also want staff to provide a project schedule/timetable in approximately one month. Commissioner Flury questioned the status of the work authorization approved by the Commission in February 2007, for the design of a roundabout at the intersection of Dixie Highway and SW 2"d Avenue. Director Orlando advised that Kimley-Horn was told by the County that they will never approve a roundabout at that site and he copied this information to City Manager Pato and Mayor Anton. He further indicated that the approved amount to be paid to Kimley-Horn was $20,000.00, but we only spent $5,000.00. Minutes of Strategic Planning Session 5 Dania Beach City Commission Saturday,June 23,2007—9:00 a.m. Mayor Anton clarified that the County would not approve a roundabout or any other type of traffic calming device at that intersection. City Attorney Ansbro explained all traffic engineering is done through the County by agreement. Commissioner Flury suggested staff obtain County approval before moving forward with projects. She further noted it would be a courtesy to notify all members of the Commission when items they approve are changed or not completed. Commissioner Flury asked City Manager Pato to find out how much the City of Hallandale Beach receives from the Gulfstream Casino. Commissioner Bertino thought we should obtain a proposal from Kimley-Hom, instead of going out to bid for a consultant. City Attorney Ansbro advised we had to go out to bid under state law. Vice-Mayor Jones thought the mobilization costs shown in Kimley-Hour's report, for the three phases,were too high. He asked staff to make sure these numbers were accurate. Mayor Anton asked for an update on the intersection of Dixie Highway and SW 2°d Avenue be presented at the June 26 Commission meeting, under Discussion Items. Director Orlando advised that bids were received for the SE 51h Avenue/Dania Beach Boulevard Signalization. He indicated that the lowest bid was approximately $279,000 and there were not enough funds in our budget to pay for this project. Director Orlando noted that he spoke with the Florida Department of Transportation and they agreed to do the job. It was the consensus of the Commission to proceed with Phases 1 A & 1 B of the report submitted by Kimley-Horn. 5. Adiournment Mayor Anton adjourned the meeting at 2:05 p.m. ATTEST: CITY F DANIA BEACH 1 LOUISE STILSON, CMC BOB ANTON CITY CLERK MAYOR-COMMISSIONER Approved: July 24, 2007 Minutes of Strategic Planning Session 6 Dania Beach City Commission Saturday,June 23, 2007—9:00 a.m. c O .V) OO O O O1 o O N _fo N >= a N V C: •— D dl n N a-J (6 L. a--) U) f _ (l)-00 � _ J fo 2 -0ru � 0 u V U) >' Xu ° (o c .w-0 fo .� � 0N � � 3 M �" v / U � � \ � � LJJ v ' � U)-00 N 01 � � c) C (JL. 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O c . —' -o .,_, ._ ?� — d- N v O F �. caN v •v O Eco L LL CD C c�tZ 4- 0 • CTIY OF DANIA BEACH POSITION VACANCIES 6/19/2007 FULL TIME FIRE CHIEF $799499.69 - $959569.39+ STAFF ENGINEER $599854.88 - $749846.15 RECREATION PRG MGR $409564.63 - $50,705.79 FIREFIGHTER/PARAMEDIC $20.2714 HR + CODE INSPECTOR $15.26 - $19.08 ADMINISTRATIVE SPEC I (CODE) $11.98 - $14.94 SUPERVISOR BCH LIFEGUARDS $16.85 - $21.04 BEACH LIFEGUARDS $15.26 - $19.08 UTILITIES MECHANIC DISTRIB $15.26 - $19.08 TREATMENT PLANT OPER I © $14.52 - $18.18 ADMINISTRATIVE ASSISTANT HR $14.52 - $18.18 MAINT WORKER/EQUIP OPER $10.86 - $15.69 PART TIME ADMINISTRATIVE TECH - Parks $10.33 - $12.93 BEACH LIFEGUARDS $15.26 - $19.08 O N 00 O (D I� 1000 N ` O) 10 t O W m l0 00 (O M O W N Q1 O M O r (O M M ovo (or (o (n (n (oco � 00 F a 0 V N N N M co I- Cl) O E (Na-) rmovc ' (oorCOSo Ur N M co N N U1 Y >O O O O O O O O O O V d) Q� Q1 m m QJ m m m OJ m o m m T CA Q1 m O) V' N � C � O � r or- 0va- NM0LOo a Mf- (O N ON 07 OO N (O rr M (o Y O O O LO � V m V (n V = N � N v a R O W m N N (O O V (O M V M V N (O LL) M N (O (O M U r O � (O V' (O (O (O I� LL 2 7i 0 0 IT00 W N V (O O PI- 0 V O N O (O � M Q N (O O V m N (O 'IT LO 4) U_ (O N N N r V U O o aT u N V C � N CL n E W o (flovO0000 .- ovo (oOOooO " (a M O N O O O O O O N V N O V V' N 0) r M O r y '� CO co O 4 N C � m C N N U = w E E U J N N O O N L N o f n Q U v m 0 m a a > > CO E- ammo = N , — L C N N OE EZ L N 0) � O 'O '6 Q (D — O LL V) C� LL 0QQ (n M N f FLORIDA To: Ivan Pato, Cite Manager From: Colin Connelly, Asst. City Manager af- Subject: Strategic Planning - Contracting of Life Guards Date: June 21, 2007 In consideration of the constraints on the upcoming fiscal year budget and subsequent budgets, the City should re-consider the contracting out of the life guard function at Ocean Park. Cost is not the ]one the factor, there are other considerations like staffing, the changing ivork culture and outside factors, Inadequate staffing There is a lack of adequate full time and part time staffing, where there are only fi FT staff approved. This results in a heavy reliance on part-time and on-call employees who are generally committed elsewhere. This impacts the predictability of scheduling and the ability to provide coverage. '1 he City must work around part-timers outside work schedules, as such; scheduling is rarely done more than two weeks in advance*. The on call guards are used so frequently that are now considered part-time by pension rules. Changing Work Culture More part-time staff is needed to fill alit the schedul('. A regular schedule is required to meet pensioli system requircivents. Hiring and retaining life guards has been difficult. An attempt to hire an assistant beach manager was unsuccessful after several months of searching. Onhq one acceptable outside candidate applied and he was From out of the mid west. The search is on hold for now. A changing work culture has caused difficulties in the recruitment of life guards, particularly those on a career path. This is evident with the gap in "Browi14 ?iTst City' Do West Dania Beach Boulevard Dania Beach. Florida 33004 Phone: (954) 1)24 3600 w,vw.ci.dania-heach.11.us Strategic Pl arming--('onIractmg Li le Guard Services the spacing of the life guard staff. The City has two life guards on the career path, both of whom are in the: drop program. Working all day in the sun is not as attractive as it might have been considering increased knowledge in skin care. The average service time of life guards with the city, (aside from those in the drop) is 2 t,, years. This retention number may be average for South Florida, it however not a very good return on investment when considering the training and skill level required by staff. Outside Factors From a budgeting perspective, private sector costs are more predictable and respond more freely to market forces. Municipal costs for services are vulneral to legislative mandates on a state and federal level. For example changes in pension laws. Unfunded state mandates like the recently unsuccessful legislation that could have increased costs by expanding the "higher risk category" in the pension system to include ocean life guards. The collective bargaining process doesn't ea�ily allow for cost containment in times of decreased revenue. Costs Advantages • The estimated saving based upon prior proposal for providing beach life guards is over$200,000 a year. • Relief from workman'scompensation issues associated with problemati cases of skin cancer that are prone to worsen in the work environment • Relief from long term pension and health care benefits • Relief from costs associated with HR recruitment 0) a0-+ V) L. — L fo CW Q) c O) c c " '' ocan G 0 . C .0 O "a Ln (n a ' cn L. o C w Ca) E tea) � �J Q fD a U o OU � p1 >o n '=3 �-a a) `� cno \ � O O LLI CD 01 � � � 0 0"a N N -a 3 Z L N (LLJfo / + a O Q) Q) a� C fB � L. C .c C C ON L L) u0aC CEO 0 '� w+ L L L Amp 4-JV -� v 'c a- 0C - w E � W IM L. 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Z lY t « a.v. 7 m c w m > c c_ m C Z w u >. m Q U U 'o m = o m 0 m LL m o m h a W m m m a u c a N N Z u o o N LL c o w 0 3 c) C ¢ a m a a a� a > � � m 2 O u u c N o 0 D H y `o o „ m c d , wLUU y m m m m o � c « y 9 m O u, m a c v D c w .M `° m ._ `0 Q m y o Q m m !r !r !r !r E >mm ¢ a rn m = 'u is tY a 3 - 'E u ; [ a` 3 N � LY > � O � co) QW UQx2S co 0 5J IJ co (A O i J c CD \ \ j CD CD ® � § / 7 \ ID K 00 \ \ / % » » & / 7 to _ e § 7 % CD f CD % CCD, 7 \ $ / \ \ \ G \ \ C \ tt 7 2 / z \ 4 m j 9 \ \ > } \ 6 j / f � CD LO � / J) / / � § j § . § § y rl bD z . \ CD / j § g rq } § \ \ / ry § Q \ / \ \ \ / j » Q % » ® \ \ 7 \ / m \ ( \ ® \ 0 § \ bo \ ± / \ 0 \ / \ \ \ \ cz \ EDLI FLORIDA INTEROFFICE MENIORANDL N1 To: Mavor Robert Anton Vice-May or Albert Joncs Commissioner Pat Flury Commissioner John Bcrtmo Commissioner Anne Castro Cc: Dominic Orlando From: Ivan Pato t City Manager a � Date June 13, 2007 Subject: Public Scrviccs Conceptual Site Master Plan Attached tou v%ill find a cope of the conceptual plan for the Cit_v's cater trcatunent plant. Included in the master plan is the location of the future Communit-_' Center and a description of the existing facilities and proposed improvements as %cell as stone%cater management for the site. We v%ill be discussing this subject in more detail at the upcoming strategic budget planning session on June 23111- Fir[ Cm- City of Dania Beach, Florida Utilities Department Water Treatment Plant Conceptual Site Master Plan May 2007 Conceptual Site Master Plan CDM Technical Memorandum To: City of Dania Beach From: CDM Date: May 24 D y , 2007 Subject: City of Dania Beach Water Treatment Plant Conceptual Buildout Master Plan 1.0 Introduction 1.1 Background On November 23rd, 2004, the Dania Beach City Commission (City) adopted Resolution Nos. 2004-204 and 2004-205 approving an Agreement with Camp Dresser & McKee Inc. (Consultant) in connection with the continuing professional engineering services contract related to the City's water, wastewater, and stormwater identified in the Waterworks Capital Improvement Program. As part of this authorization the Consultant was tasked with developing a Conceptual Buildout Site Master Plan for the Water Treatment Plant (WTP) site located at 1200 Stirling Road in the City of Dania Beach, Florida. A site location map is provided in Figure 1-1. The property houses the City's WTP,future Community Center, and Public Works complex. The City operates a WTP with a capacity of 3.0 MGD of potable drinking water at the project site. The WTP currently utilizes a conventional lime softening process to produce the water, and the city is currently considering the addition of a 2.0 MGD membrane softening or nanofiltration process in order to improve the finished water quality, to provide continued compliance with water quality and disinfection regulations, and to meet projected increasing demands. cmS%Ciienl#2eo27%P,ledtl 3395VConeSponeen@a DanaSlteMastei TecnMem1_52407 do, M'U'l Iv Ilk- y MuY' '+ r"tR!''� a �: 7s �Q►•, � ! !I ■1- �.la q _.�.,� � 5'4.> [jy�ttofIF IIRtA�CUTOfPGAiOti OF- _d at� � "sq a a.k*4 __F � r q•. �f.wwrRt ` amvk lit a. 11 2 ! ) l _ `its, xs'3q 2• t gg.� ! ' ._ It 33 t + vz+rt- i It • + ' ,Y;'."wt s, �at1 w ate-.. zi I'`,w�. r , 4�:.n.• It -s.r.....pa � 1.�• i .9-NiLa at Technical Memorandum May 24, 2007 Page 3 of 15 2.0 Site Improvements 2.1 Northern Site Improvements The northern half of the site houses the City's existing water treatment facilities, other miscellaneous uses such as equipment and vehicle storage, and a fuel station for the City's vehicles. This portion of the site is accessed from SW 12th Ave (Ja Ely Blvd) through a gated entrance just south of Stirling Road. Also, there is a driveway from the south end of the site in the southeast corner. The existing water treatment plant site layout is shown in Drawing C-1 located in Appendix A. The objectives for the water treatment plant portion of the site master plan are as follows: 1. Accommodate the proposed 2.0 mgd nanofiltration process addition and other associated process-related improvements. 2. Develop an efficient plant layout to facilitate future operation and maintenance of the existing lime softening facilities, as well as the proposed nanofiltration facilities. 3. Relocate the fueling station to the south half of the site. 4. Separate the north and south halves of the site, thereby isolating the water treatment process operations so that the water treatment plant site will be more secure,and access to the water treatment plant site can be better controlled. 5. Provide better management of traffic entering the water treatment plant site from Stirling Road (traffic currently backs up on SW 12Lh Ave to Stirling Road). In addition to the above objectives, it is recognized that several existing features, structures, and facilities will be either relocated off the water treatment plant site, or demolished, leaving additional space to accommodate the proposed facilities. These components are depicted as "To Be Removed" on Drawing C-4 in Appendix A. Drawing C-6 depicts the proposed build- out conceptual site plan for the water treatment plant site, as described in greater detail below (see Appendix A). 2.1.1 Nanofiltration Process Building CDM is in the process of preparing a preliminary layout of the proposed membrane building, but the building footprint was determined for the purpose of identifying the required space on the site. Considerations for identifying the best location for the building on the site included the following: • Available space to accommodate the building • Proximity to existing major piping and available routes for new major piping (e.g., raw water, permeate to clearwell, and concentrate to disposal) • Visual impact to public and neighboring properties cm Technical Memorandum May 24, 2007 Page 4 of 15 • Vehicular and maintenance access to equipment in the building. • Parking for operators • Accommodation of other required facilities (e.g., stormwater retention facilities, chemical facility, etc.) Based on the above considerations and the preliminary building layout,CDM recommends that the process building be located in the northeast portion of the site, as shown in Drawing C-6 located in Appendix A. This location will accommodate the building and the routing of major process and chemical piping without requiring extensive relocations of existing structures. The existing entrance to the site can be relocated to the south, further from Stirling Road, to reduce traffic back-ups. Regarding visual impacts to neighbors, it is recommended that the chemical facility be located in the interior of the site to provide a visual buffer zone. Architectural features to make the building more appealing can be much more easily incorporated into the process building than the chemical facility. Therefore, it is recommended that the process building (rather than the chemical facility) be located closer to the site border. Drawing C-6 also depicts the proposed service drive within the site to provide vehicular access to key areas of the process building, as well as access to the chemical bulk storage tanks in the chemical facility (see Appendix A). The preliminary building layout includes roll-up doors on the west side to provide access to the front of the membrane skids for maintenance or repair of the membrane feed pumps and loading or unloading of the pressure vessels and membrane elements. A small parking area for operating staff could be included along the south end of the building. 2.1.2 Chemical Facility The main chemical facility will consist of a cast-in-place concrete rectangular containment basin, bulk storage tank, day storage tank, and chemical metering pumps for each chemical. The proposed layout includes the chemical metering equipment located adjacent to the bulk storage tank for each chemical. Chemicals to be stored on site and used in the process in this configuration will include antiscalant, 50% sodium hydroxide solution (caustic), 93% sulfuric acid, and zinc orthophosphate corrosion inhibitor. In addition to these chemicals, the City will also have a sodium hypochlorite storage and feed system for primary disinfection of the treated water, and an anhydrous ammonia storage and feed system for formation of a combined chloramines disinfectant residual in the finished water. The configurations of these systems may differ significantly from the other chemical systems. The City is now considering the different types of hypochlorite systems that are available. In any case,it is recommended that all of the chemical storage and feed systems be located in a single, central area to facilitate off- loading of bulk chemical deliveries, and to make observation and monitoring of the chemical handling and feeds easier for the plant operating staff. cm Technical Memorandum May 24, 2007 Page 5 of 15 The recommended location for this centralized chemical facility is in roughly the center of the site, as shown in Drawing C-6 located in .Appendix A. In addition to providing a visual buffer from the neighboring properties, this location can be easily accessed by chemical delivery trucks, is readily observable from the nanofiltration process building control room, and is centrally located relative to chemical piping to the various chemical application points throughout the process. 2.1.3 Finished Water Clearwell Depending on evaluations to be performed during the nanofiltration process preliminary design, it is possible that the construction of a new clearwell and transfer pump station could be recommended. The additional facilities would provide thorough blending of the nanofiltration permeate with the lime softened water,meet applicable disinfection regulations, and provide an appropriate point for application of post-treatment chemicals. In addition, the permeate degasifiers located downstream of the membrane process will discharge directly into the clearwell prior to blending with the lime softened process, requiring a significant footprint. If it is determined that construction of a new clearwell is appropriate, it is recommended that it be constructed in the northwest corner of the site, as shown in Drawing C-6 located in Appendix A. This location will accommodate the footprint based on preliminary sizing of the clearwell, and routing of lime softened water and permeate piping will be simpler than alternate locations. Transfer piping to the ground storage tank is also directly adjacent to this proposed location. 2.2 Southern Site Improvements 2.2.1 General Improvements The southern portion of the water treatment plant site is to be developed in order to maxim ze its potential benefit to the City. Several structures are proposed, including a community center and public works facilities. The majority of the area is to be paved and will be separated from the northern portion of the site, limiting access to the water treatment plant. A new fueling station along with a gravel truck parking area and an access road to the City owned nursery located south of the project site are also planned. 2.2.2 Public Works Facilities The proposed public works facilities, consisting of a garage, a public works building, and a public services office,are to be located near the southern boundary of the site. The facilities will be offset from the western berm by approximately thirty to thirty-five feet to allow for the installation of a gravel road providing access to the City nursery located south of the project site (see Drawing C-7located in Appendix A). It has been determined by others that the buildings making up the public works facilities will be pre-engineered structures. Parking will be provided along the north side of the public works and public services offices, as well as around the perimeter of the southern portion of the site. cm Technical Memorandum May 24, 2007 Page 6 of 15 2.2.3 Community Center The proposed community center is to be located in the southeastern corner of the site. The area will be separated from the water treatment plant and the public works facilities by a fence, and shall have a single, ungated entrance on SW 121n Avenue. Parking for the community center will be provided in a lot located adjacent to the building (see Drawing C-7 located in Appendix A). It has been determined by others that the community center building will be a Concrete Block Structure (CBS) with wood trusses. 2.2.4 Fuel Station A new fuel station and underground storage tank are proposed to be located near the center of the southern portion of the site. The layout will provide for trucks and equipment to circle the station and drive through while other vehicles are fueling. It is anticipated that a digital fuel management system will be installed, to allow for keypad access with remote transaction recording. 3.0 Site Stormwater Management 3.1 Regional Drainage Features The City of Dania Beach Water Treatment Plant area falls within the South Florida Water Management District (SFWMD) Broward-Palm Beach Coast watershed.The project site is located in western Dania Beach,within the C-10 Canal drainage basin. The C-10 Canal flows north past the project site to join with the Dania Cut-Off Canal which then flows east to the Intracoastal Waterway and ultimately to the Atlantic Ocean. 3.2 Existing Site Drainage Features The existing topography of the Project area separates the site hydrology into five distinct systems. There is the southern drainage basin which is approximately 1 acre in size and discharges off-site to the south. There is the western drainage basin, approximately 0.2 acre in size that discharges off-site to the west. The northern drainage basin flows offsite to the north into the existing FDOT stormwater management system servicing Stirling Road. The eastern drainage basin flows offsite to the east into the City stormwater management system running along SW 12th Avenue (ja Ely Blvd.). And finally there are the "Pond North", "Pond South", and "Pond" drainage areas that flow to the existing onsite stormwater management area. Runoff from the pond discharges to the east into the aforementioned City system that flows to the north,tying into the FDOT stormwater system running along Stirling Road and ultimately discharging into the SFWMD C-10 Canal (see Figure 3-1 for existing drainage basins and flow patterns). Under proposed conditions all on-site runoff resulting from storms up to the 25-year design storm will be retained on site by a perimeter berm for applicable water quality treatment. The regulated flows will then be discharged via the historic connection to the City owned and operated stormwater system running along SW 12th Avenue (Ja Ely Blvd.). cm Technical Memorandum May 24, 2007 Page 7 of 15 3.2.1 Existing Flooding Conditions Based on Figures 3-2-1 and 3-2-2, FEMA FIRM Panel No. 308 of 319, Map No. 12011C0308F, August 18t", 1992, the project site is located within Zone AE.The 100-year flood plain elevation has been determined to be TO feet NGVD29. The limits of the 100-year flood plain are shown in Figures 3-2-1 and 3-2-2. 3.2.2 Topography Existing water treatment plant site topography ranges from elevation 3.5 feet NGVD to elevation 10 feet NGVD (see Figure 3-1 and Drawings C-1 and C-2 found in Appendix A). The source for the topographic information is survey data dated March 7, 2005 provided by Keith & Associates, Inc. A berm is proposed to be constructed around the project site at a minimum elevation 6.9 feet NGVD to ensure that on-site runoff leaves the site only through the permitted control structure. The minimum berm elevation was determined based on the peak stages encountered during the 25-year, 72-hour design storm in accordance with local regulatory requirements set forth by Broward County Environmental Protection Department (EPD) and SFWMD. cm e R �4i t �k tl_y Lb tl.�� �Yt4 F gyp�� � ?vL Y '.fit 4 P Aa �t t� � I ._�� 4 vP 1YY�t4a ��ro S y F aC ri 3 t 41, ap 4 AV o- d IN . . �• 4 7 am 9}° n: am _ gEa°$ <F< z c OyF ox LL x3,pt "8 8vt`� (� _ 60L0 13 d SNIOf » / tv /\ /z } \ & ( �I g ; 0U O\- ^\� \ : ! ! El E a < ! . : J«g &z ; . aa �9a ` ® : zr ƒSS§ ) § \ j j a§ t . . . . /8 (l . Technical Memorandum May 24, 2007 Page 11 of 15 3.2.3 Soils The predominant SCS hydrologic soil types occurring within the project area are Margate fine sand and Arents-Urban Land Complex. These soils are generally characterized as poorly drained sands and fall into the D hydrologic soil classification group. 3.2.4 Land Use The existing Florida Land Use and Cover Classification System (FLUCCS) land use within the project area consists of Utilities: Water Supply Plants, and in proposed conditions the land use will remain the same. 3.2.5 Stormwater Analysis under Existing Conditions The historic stormwater system allowed untreated runoff to flow off the site. The runoff that was captured was commingled with the lime sludge supernatant and discharged to the adjacent City stormwater system. As part of the Broward County General Surface Water License No. GL2006-28 the two systems were separated, eliminating the discharge of demineralization concentrate to the stormwater system. 3.2.5.1 Existing Hydrology CDM delineated drainage patterns, subbasin boundaries, times of concentration, and curve numbers. To develop these parameters, data related to soil types, land cover, and topography was collected and analyzed. Subbasins were delineated using both surface topography and stormwater inventories. The subbasins within or directly contributing to the project area are shown in Figure 3-1 and ultimately drain to the SFWMD C-10 Canal. 3.2.5.2 Existing Hydraulic Conditions The major hydraulic feature around the project area is the SFWMD C-10 Canal. Storm water is currently managed on the property by two catch basins that are located in low lying areas of pavement and having no discharge offsite. The eastern catch basin consists of a french drain piping system (15 inch diameter). The western catch basin has a pumped discharge to the surface on site. Much of the stormwater sheet flows off-site, draining to the FDOT system along Stirling Road and the City stormwater system along SW 12th Avenue which ultimately joins the Stirling Road system en route to the C-10 Canal (see Figure 3-1 for flow paths). A portion of the site has historically drained to the combination stormwater/lime sludge pond onsite. Overflow from the pond entered the City's municipal stormwater system running along SW 12th Avenue, tying in with the FDOT system running along Stirling road, and eventually draining to the C-10 Canal. The two systems were separated as part of Broward County General Surface Water License No. GL2006-28. 5]Clieni 4nO37AProjedO 339S0onespondenc ADeela511eMesler 15cWM 24 07 em Technical Memorandum May 24, 2007 Page 12 of 15 3.3 Proposed Stormwater Conditions 3.3.1 Proposed Site Drainage Features This project proposes to develop the City of Dania Beach Water Treatment Plant site and treat onsite runoff with a combination of interconnected dry retention/detention facilities. After water quality treatment the flows will be discharged via the existing connection to the City owned and maintained stormwater system running along SW 12th Avenue,flowing north to the FDOT system along Stirling Road,with the ultimate discharge to the SFWMD C-10 Canal. The proposed system for the City WTP primary drainage features are discussed below. 3.3.2 Proposed Design The proposed project conceptual master drainage plan consists of development of the site to add a membrane filtration plant and construct a community center and public works complex. This development will generate stormwater from various proposed onsite areas to several interconnected retention/detention facilities for treatment and discharge offsite. Significant water quality benefits are anticipated as a result of this project. The proposed conceptual master drainage plan consists of three primary components. These components include 1) the construction of four dry retention/detention facilities; 2) improvement of the existing control structure servicing the site; and 3) development of a conveyance system and berm surrounding the site to ensure that runoff is properly treated before leaving the project site. The proposed master drainage plan conveys onsite drainage to four interconnected retention/detention facilities. After providing the required treatment and attenuation, the retention/detention facilities discharge via a single control structure utilizing the existing connection to the City owned and maintained system to the east,ultimately discharging to the SFWMD C-10 Canal. 3.3.2.1 Proposed Dry Retention/Detention Facilities The proposed dry retention/detention facilities included in the conceptual master drainage plan will provide treatment of runoff from proposed onsite development. A total of four interconnected dry retention/detention facilities are included in the master drainage plan (Drawings C-6 & C-7located in Appendix A). Typical details of the proposed stormwater facilities and control structure are provided in Drawings CD-1 & CD-2 found in Appendix A. Control elevations and stage-area-volume relationships for the proposed stormwater system are provided in Table 3-1. The total proposed storage area at the control and the top of bank elevations are approximately 0.6 acres and 0.7 acres, respectively. cm Technical Memorandum May 24, 2007 Page 13 of 15 Table 3-1 Proposed Project Stormwater Ponds and Storage Area Dimensions and Elevations Proposed Bottom Top of Bank 'ear 25-year 100-year Stage-Storage Relationship Stormwater Elevation Elevation Peak Stage Peak Stage Peak Stage Stage Area Storage Treatment (ft NGVD) (ft NGVD) (lt NGVD) (tt NGVD) (ft NGVD) (ft NGVD) (Acres) (AC-FT) Area 3.00 0.08 0.00 Pond_A 3.0 7.0 6.73 6.91 7 07 3.80 0.10 0.07 7.00 0,18 0.52 3.00 0.03 0.00 Pond_B 3.0 7.0 6.73 6.91 7.07 3.80 0.04 0.02 7.00 0.09 0.23 3.00 0.12 0.00 NE-Pond 3.0 7.0 6.71 6.91 7.07 1 3.80 0.14 0.11 7.001 0.31 1 0.86 3.00 0.03 0.00 South-NE 3.0 6.9 6.77 6.91 7.07 3.80 0.04 0.03 6.70 0.08 0.21 The stage storage relationships provided by the proposed stormwater system are shown in Table 3-2. The stormwater retention/detention areas are linked via pipes and regulated by a single control structure located at the downstream end to provide for maximum storage and treatment. 3.3.3 Proposed Topography Proposed changes in topography include the proposed structures and stormwater retention/detention facilities, along with the perimeter berm. The stormwater areas were designed with side slopes of 3:1 and bottom elevations of 3.0 feet NGVD in order to maintain one foot of separation between the facility bottoms and the seasonal high ground water table (see Drawings C-6, C-7, & CD-1 found in Appendix A). It is anticipated that onsite parking lots and road elevations will be set at or above the maximum flood stages experienced during the 10-year, 24-hour storm event. The top of bank elevations of all stormwater management areas will be set at or above maximum 25-year, 72 hour stages, and structural finished floor elevations will be above the 100-year, 72-hour zero discharge elevation of 8.5 feet NGVD, based on project site modeling. 3.3.4 Land Use The existing land use within the project area consists of Utilities: Water Supply Plants. In proposed conditions the land use will remain the same, with the northern half of the site dedicated to water treatment and the proposed Community Center and Public Works facilities being located on the southern half of the site. 3.3.5 Stormwater Analysis of Proposed Conditions Existing historic conditions within the project area were modeled to develop existing flood stages on the site and to determ ne offsite discharges. CM Technical Memorandum May 24, 2007 Page 14 of 15 A post-development stormwater model was developed from the existing conditions model to reflect conceptual project conditions. The model was used as a tool to develop a project design that meets the Broward County EPD and SFWMD criteria for stormwater management systems. 3.3.5.1 Hydrology Project hydrologic modeling was based on the existing conditions and proposed site improvements. The model incorporated proposed site drainage patterns, subbasin boundaries, times of concentration,and curve numbers. To develop these parameters, data related to soil type, land cover, and topography were collected and analyzed. Subbasins were delineated using both existing and proposed topography as well as the proposed stormwater management facilities. The design storms run under proposed conditions include the 10-year, 24-hour and 25- and 100-year, 72-hour storms. Simulations were modeled with rainfall depths of 8.5 inches, 13.9 inches and 17.7 inches, respectively. The SCS Type II Florida Modified and SFWMD72 rainfall distributions were used for all storms. 3.3.5.2 Hydraulics The existing conditions model was modified to represent proposed conditions as described in this section. The project design is based upon meeting Broward County EPD and SFWMD criteria for stormwater management systems. The proposed hydraulic system consists of numerous catch basins located throughout the project site to convey runoff to the interconnected retention/detention system (see Drawings C- 6 & C-7 in Appendix A), which provides the necessary attenuation required to meet all applicable regulatory criteria. The proposed berm elevation was set at a minimum elevation of 6.9 feet NGVD,below the FEMA 100-year flood stage of 7.0 feet NGVD,in order to manage all runoff from the 25-year 72, hour design storm.This will allow the proposed system to provide all necessary treatment while remaining connected to the surrounding area during extreme storm events. 3.3.5.3 Dry Retention/Detention Treatment The proposed drainage plan provides dry retention/detention water quality treatment for onsite runoff. The onsite stormwater management system retains approximately 0.52 inches (0.23 acre-feet) between the stormwater treatment area bottoms at elevation 3.0 feet NGVD and the invert of the v-notch at elevation 3.8 feet NGVD. Approximately 2.15 inches (0.95 acre-feet) of dry detention are provided between elevation 3.8 feet NGVD and the control structure overflow at elevation 6.7 feet NGVD. Current wet detention criteria require a system to provide a treatment volume of the greater of 1-inch over the basin or 2.5 inches over the impervious area. The dry detention volume required is equal to 75 percent of the computed wet detention. For the 5.3-acre site with a composite 60% imperviousness, the minimum dry detention treatment volume is 0.50 acre-feet. Approximately 0.22 acre-feet dry pre-treatment is needed assuming a 0.5-inch dry pre- treatment volume requirement. The conceptual system provides 0.23 acre-feet of retention, meeting the dry pre-treatment requirement. The dry pre-treatment volume is not counted cm Technical Memorandum May 24, 2007 Page 15 of 15 towards the total water quality volume provided, and the system as a whole provides a total on-site water quality treatment volume of 0.96 acre-feet. The stormwater areas are all interconnected via equalization culverts. Preliminary site geotechnical work shows soils that appear to be conducive to the construction of retention areas. Further geotechnical analysis will be performed prior to construction to co nfirm infiltration parameters suitable for retention. In the event that site soil conditions are determined not to be optimal, the proposed retention areas will be over-excavated and replaced with acceptable fill material, with the excavated material to be used as fill elsewhere on the site. 3.3.6 Summary of Proposed Stormwater Design The proposed stormwater system consists of numerous inlets to convey site runoff to four interconnected retention/detention areas for treatment and attenuation prior to discharge offsite to the existing City system running along SW 12th Avenue,ultimately discharging to the SFWMD C-10 canal. The conceptual design is in accordance with all applicable Broward County EPD and SFWMD regulations. 4.0 Conclusions and Recommendations 4.1 Permitting Requirements Permitting will play an important role in the implementation of the conceptual site improvements outlined in this document. The efficient and thorough assembly along with a timely submittal schedule of all required permits will help ensure the success of the project. It is anticipated that permits will be required from the following agencies: Broward County Health Department, Broward County Highway Construction and Engineering Services Division, South Florida Water Management District, Florida Department of Transportation, Froward County Environmental Protection Department, United States Army Corps of Engineering, and the City of Dania Beach. Additional regulatory agencies may need to be engaged, depending on the final design determinations made with respect to site improvements. Final permitting requirements will be determined during the respective design phases. 4.2 Conclusions This document is intended to serve as a conceptual buildout master plan for the City of Dania Beach Water Treatment Plant Site. Based on these findings the City can proceed with detailed design to implement the site improvements described in this technical memorandum. cm APPENDIX A CDM O z _O C) w U � a � W W i (n Up �3 OEd � ° w 0 � x p Oj O w u. 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