Loading...
21-1583 Facilities Plan for the East Longwood Area Septic Tank Abatement Program Phase 2 thru 6 RESOLUTION NO. 21-1583 A RESOLUTION OF THE CITY COMMISSION OF THE CITY OF LONGWOOD, FLORIDA, AUTHORIZING ADOPTING A FACILITIES PLAN -- FOR THE EAST LONGWOOD AREA SEPTIC TANK ABATEMENT - PROGRAM PHASE 2 THRU PHASE 6 FOR THE CITY'S WASTEWATER UTILITY SYSTEM IMPROVEMENT; PROVIDING FOR CONFLICTS, SEVERABILITY,AND AN EFFECTIVE DATE. _ — WHEREAS, the City is granted the authority, under section 2(b), Art. VIII of the State Constitution, to exercise any power for municipal purposes, except when expressly prohibited - - by law; and, WHEREAS, the City of Longwood, Florida, owns and operates a wastewater utility; and WHEREAS, the City's consultant, Barnes, Ferland and Associates, Inc. developed a-May 2021 Clean Water SRF Facilities Plan for the East Longwood Area Septic Tank Abatement Program Phase 2 thru Phase 6(hereinafter the "Plan"); and WHEREAS, the Plan has been presented to the City Commission and after due consideration of the Plan by the City Commission, the City Commission now desires to officially accept and adopt the Plan as a management tool for purposes of providing information to assist the City with providing reliable wastewater utility service to its wastewater customers; and, WHEREAS, the City Commission hereby finds that this Resolution is in the best interest of the public health, safety and welfare; and, NOW, THEREFORE, BE IT RESOLVED BY THE CITY COMMISSION OF THE CITY OF LONGWOOD, FLORIDA,AS FOLLOWS: SECTION I. Recitals. The foregoing findings are incorporated herein by reference and made a part hereof. SECTION II. Adoption of the Plan.The City Commission hereby officially accepts and adopts the May 2021 Clean Water SRF Facilities Plan for the East Longwood Area Septic Tank Abatement Program Phase 2 thru Phase 6 for the City of Longwood. The Plan is attached hereto as EXHIBIT "A" and fully incorporated herein by this reference.The Plan shall be considered a management tool for purposes of providing information to assist the City with providing reliable wastewater utility service to its residential, commercial and institutional wastewater customers. SECTION III. Conflicts. All resolutions or part of resolutions in conflict with any of the provisions of this Resolution are hereby repealed. SECTION IV. Severability. If any section or portion of a section of this Resolution proves to be invalid, unlawful, or unconstitutional, it shall not be held to invalidate or impair the validity, force, or effect of any other section or part of this Resolution. Resolution No.21-1583 Page l of 2 SECTION V. Effective Date. This Resolution shall become effective immediately upon its passage and adoption. PASSED and ADOPTED this 15th Day of November 2021. Brian D. Sackett, M ATTEST: fiche ng , NIR , City Clerk Approved as to form and legality for the use and reliance of the City of Longwood, Florida, only. Daniel W. La , C' ney Resolution No.21-1583 Page 2 of 2 EXHIBIT "A" CLEAN WATER SRF FACILITIES PLAN FOR EAST LONGWOOD AREA SEPTIC TANK ABATEMENT PROGRAM PHASE 2 THRU PHASE 6 Prepared For: City of Longwood Public Utilities Prepared By: FA Environmental Consultants Barnes, Ferland and Associates, Inc. 1230 Hillcrest Street Orlando, FL 32803 May 2021 e_re P Historic ,: v _ I ,ONGWOOD Florida City of Longwood East Longwood Area Septic Tank Abatement Program Phase 2 Thru Phase 6 LoNcwoon /' FInildu TABLE OF CONTENTS Section Page 1.0 Executive Summary 1 1.1 Project Description 1 1.2 Justification for Project 1 1.3 Project Location Map 1 1.4 Environmental Effects/Benefits 2 1.5 Alternatives Assessments 3 1.6 Public Participation 4 1.7 Financial Feasibility 4 1.8 Adopting Resolution 4 2.0 Project Understanding and Introduction 5 3.0 Background Information 8 4.0 Service Area Characteristics 9 4.1 Existing Land Use 9 4.2 Existing Roadways 9 4.3 Topography 10 4.4 Existing Water Facilities 10 4.5 Existing Wastewater Facilities 10 4.6 Existing Storm and Drainage Systems 12 5.0 Wastewater Flow Projections 16 5.1 Methodology for Development of Existing and Future Wastewater Flows 16 5.2 Existing Wastewater Flows 17 5.3 Peak Hourly Flow 20 6.0 Development and Evaluation of Wastewater System Alternatives 21 6.1 City of Longwood Standards and Design Criteria 21 6.2 Wastewater System Alternatives Development 22 6.3 Downstream Pump Stations and Force Main Capacity Analysis 24 6.4 Evaluation of Wastewater System Alternatives 29 6.5 Recommended Alternative 33 7.0 Project Implementation and Phasing 35 City of Longwood East Longwood Area Septic Tank Abatement Program + - Phase 2 Thru Phase 6 LONGWOQD r• i „ rid Table No. Page Table 1 Anticipated Nutrient Load Reduction 2 Table 2 Project Schedule 4 Table 3 Land Use Summary 9 Table 4 Pump Station Data 11 Table 5 Land Use LOS 16 Table 6 Existing Wastewater Flow 17 Table 7 Future Wastewater Flow 18 Table 8 City of Longwood Peaking Factor Standards 20 Table 9 Existing and Future Peak Wastewater Flow 20 Table 10 Downstream Pump Stations Capacity Evaluation 25 Table 11 Force Main Capacity Evaluation 29 Table 12 Alternative 2 Cost Estimate 31 Table 13 Alternative 3 Cost Estimate 32 Table 14 Comparison of Economic and Non-Economic Factors 33 Table 15 Project Phasing Cost Estimates and Implementation 35 Figure No. Page Figure 1 Phasing Plan and Completion Status 6 Figure 2 Project Boundary and Planning Area 7 Figure 3 Existing Topography 1-ft Contours 13 Figure 4 Existing Water Facilities 14 Figure 5 Existing Wastewater Facilities 15 Figure 6 Existing and Future Flow Parcel Land Use 19 Figure 7 Alternative 2 Gravity Sewer, Pump Station and Forcemain Extension 26 Figure 8 Alternative 3 Low Pressure Sewer System 27 Figure 9 Existing and Future Pump Station Subareas 28 Figure 10 New Project Boundary and Phasing Plan 36 Appendix Appendix A Protected Species List Appendix B City of Longwood Stormwater Master Plan Drainage Structure Inventory Updates Appendix C East Longwood Phase 2 Septic Tank Abatement- Draft Preliminary Design Report ii City of Longwood East Longwood Area Septic Tank Abatement Program ,`, Phase 2 Thru Phase 6 LONcwooti " Florida 1.0 Executive Summary 1.1 Project Description This report will serve as the Facilities Planning Document for the City of Longwood Septic Tank Abatement Program in the East Longwood Area -Phase 2 thru Phase 6. The wastewater improvements identified in this plan will be constructed on public right of ways and within utility easements and therefore no property acquisition will be required for these projects. All recommended improvements in this Planning Document will be implemented in phases over the I next several years. East Longwood Phase 1 is complete and Phase 2 will begin with the acceptance of this planning document. Also, a complete Preliminary Design Report for East Longwood Phase 2 Septic Abatement Project is attached to this report as Appendix C. The City's phasing plan and completion status for their septic abandonment projects is included in Figure 1. The East Longwood Septic Tank Abatement Program goal is to provide sanitary sewer service to approximately 513 residences and businesses currently served by septic systems. Various methods of providing wastewater service were evaluated including gravity sanitary sewer and low-pressure sewer. Some areas will require pump stations and force main extensions, while others may be able to connect to nearby existing gravity sewer systems. 1.2 Justification for Project A majority of the septic systems in project areas have been in service for over 30 years and have surpassed their design life expectancy. Replacement costs for failing septic systems continue to increase and regulatory requirements are becoming more stringent. Failing septic systems increase the risk of serious health and safety conditions for residents within the affected areas and can have detrimental environmental impacts to surface and groundwater sources. Installation of a sanitary sewer system to provide wastewater service as a replacement to septic tanks and drain fields will provide a healthier and safer environment for the residents living in this area and in the long-term be more cost effective. 1.3 Project Location Map The planning are for the East Longwood Area Septic Tank Abatement Program is located in the City of Longwood; generally the area north of SR 434,west of Hwy 17-92,east of CR 427 and the railroad tracks,and south of Eagle Ave. and the Skylark subdivision as shown on Figure 2. Collectively, these projects encompass approximately 557 acres and 7.6 miles of roadway. Land use within the areas is a mix of vacant lots, single family homes, multi-family homes, and commercial businesses. Page 1 of 36 City of Longwood East Longwood Area Septic Tank Abatement Program Phase 2 Thru Phase 6 LONGWOOD rlvii J . 1.4 Environmental Effects/Benefits Environmental Effects The project areas within the City of Longwood are currently developed with primarily single- family homes,some multi-family,and commercial development.Since the sites already lie within established communities,the Septic Tank Abatement Projects are not anticipated to pose a threat or adversely affect threatened or endangered flora and/or fauna, surface waters, wetlands, or undisturbed natural areas. Based on the location of the project areas, a protected species list was developed using information from the U.S. Fish and Wildlife Service and attached in Appendix A. During Final ( Design Engineering a qualified biologist will survey the area to identify if there are any endangered,threatened or species of special concern present.Should any endangered,threatened or species of special concern be identified in the project area,the appropriate action shall be taken in conjunction with all federal,state,and local jurisdictional agencies. The projects will not have any significant adverse health effect to human health or environmental effects on minority or low-income communities. Environmental Benefits As septic systems age, buildup of organic material causes a loss of infiltrative capacity of the subsurface soil dispersal system which can cause ponding and in severe cases surfacing of untreated effluent. In addition, older septic systems generally were installed to lower standards with less oversight in comparison with new systems. Conversion to a sanitary sewer system will reduce excess nutrient runoff and prevent future septic system failures. This excess nutrient reduction helps prevent eutrophication in the nearby lakes and streams. The total anticipated load reductions annually from the projects are listed below: Table 1 Anticipated Nutrient Load Reduction East Longwood Number of Total Nitrogen Total Phosphorus Project Phase Septic Tanks Removed(lbs) Removed(lbs) Phase 2 122 3,782 610 Phase 3 90 2,790 450 Phase 4 119 3,689 595 Phase 5 90 2,790 450 Phase 6 92 2,852 460 Total 513 15,903 2,565 Installation of a sanitary sewer system to provide wastewater service as a replacement to septic tanks and drain fields will provide a healthier and safer environment for the residents living in this area;and in the long-term be more cost efficient as the cost to replace septic systems is rising. Page 2 of 36 City of Longwood East Longwood Area Septic Tank Abatement Program Phase 2 Thru Phase 6 ONcwoori 1.5 Alternatives Assessments The development and evaluation of alternatives is presented in section 6.0 of this report. Some alternatives were limited to extension of existing facilities. Justification for the selected alternatives is based on costs, applicability, and effectiveness. A cost comparative analysis was performed based on present worth value. Each project alternative was also compared using economic and non-economic factors. Selected Alternative Three alternatives for providing wastewater service to the study area were developed and considered for evaluation: • Alternative 1: No Action-Residents remain on septic systems and drain fields. • Alternative 2: Conventional Gravity Sewer System Extension - Includes pump stations and force mains. • Alternative 3: Low Pressure Sewer System - Includes grinder pump stations at each property. The alternative that received the highest combined score was extension of gravity sewer, pump station and force main and is based on a comparison of both economic and non-economic factors. Though Alternative 2 had an estimated higher net present worth cost, this alternative exhibited greater system reliability,fewer operational concerns,and greater community acceptance. These factors being very critical to project success. Alternative 2 is recommended for implementation. Planning level cost estimates for the selected alternative based on the recommended project phasing presented in section 7.0 of this plan is as follows: Phase 2 $ 2,562,000 Phase 3 $ 1,890,000 Phase 4 $ 2,499,000 Phase 5 $ 1,890,000 Phase 6 $ 1,932,000 Total Construction $ 10,773,000 Note: Costs not included for septic tank abatement and service connections on private property. This work will be funded by other sources. Page 3 of 36 City of Longwood East Longwood Area Septic Tank Abatement Program Phase 2 Thru Phase 6 LONGWOO r i d x Project Schedule It is the City's desire to complete one septic abatement project per year as shown in section 7.0 of this report. The following table shows the current status of the East Longwood Phase 2, desired construction start dates and targets for achieving a fundable listing on the Project Priority List. Table 2 Project Schedule East Longwood Project Design Completion Priority Listing Construction Phase 2 June-21 Aug-21 Sep-21 Phase 3 thru 6 March-June August September 1.6 Public Participation A public meeting will be hosted and publicly advertised by the City of Longwood in the near future for the East Longwood Phase 2 Septic Tank Abandonment project. A copy of the advertisement and certification of public participation will be provided under separate cover at a later date. Additional public meetings will be held in the future as Phase 3 through Phase 6 are implemented. 1.7 Financial Feasibility A capital financing plan, including identification of revenue sources dedicated to repaying the loan,will be provided under separate cover at a later date. 1.8 Adopting Resolution A copy of the adopting resolution authorizing implementation of the planning recommendations by the City will be provided under separate cover at a later date. (Remainder of page left blank intentionally) Page 4 of 36 City of Longwood East Longwood Area Septic Tank Abatement Program Phase 2 Thru Phase 6 oNcwooii Florida 2.0 Project Understanding and Introduction Beginning in 2015, the City Longwood was awarded grant funding in partnership with the St. Johns River Water Management District (SJRWMD) and the Florida Department of Environmental Protection (FDEP) to implement a septic abandonment project in the South Longwood area. The project purpose was to decommission existing on-site sewage treatment and disposal systems (OSTDS/septic tanks) and connect these properties to centralized sewer collection systems. Since this initial project, the City has continued to receive grant funding for eight (8) additional projects. The City's phasing plan and completion status for their septic abandonment projects is included in Figure 1. Currently, the City is in the process of completing construction on East Longwood Phase 1, beginning construction on Longdale,and in design with East Longwood Phase 2. Approximately 3,000 LF of sanitary sewer extension associated with the East Longwood Phase 2 areas has been constructed within the East Longwood Phase 1 project to take advantage of available grant funding and meet schedule deadlines as a requirement of that funding. This provides for additional funds available in the East Longwood Phase 2 project and the ability to expand this project phase area. With this study, the City of Longwood desires an area-wide evaluation to prioritize future projects within the East Longwood study area to abandon all existing septic tanks and provide wastewater service to all existing and future customers. The planning area for this project is generally the area north of SR 434,west of Hwy 17-92,east of CR 427 and the railroad tracks,and south of Eagle Ave and the Skylark subdivision;see Figure 2. BFA Environmental Consultants (BFA) is providing the following services to complete the East Longwood Area Wastewater Planning Evaluation for the City: • Service Area & Flow Analysis: Evaluation of service area characteristics and flows, identification of growth/redevelopment areas, and establishment of design flows for the project area. • Development and Evaluation of Wastewater System Alternatives: Develop alternative wastewater collection and transmission system layouts to provide wastewater service to all properties in the planning area. • Hydraulic Modeling:Develop a hydraulic model of the pump station and force main network within the East Longwood planning area, adjust model parameters to simulate existing performance, and use the model to assess the performance of the proposed system. Field investigations will be performed to fill-in data gaps. This facility plan provides a summary of the Service Area & Flow Analysis and Wastewater System Alternatives in support of developing viable options for providing wastewater service to the East Longwood Area and to identify future Longwood Septic Tank Abatement Projects. Hydraulic modeling will be completed as an update to this report with a separate technical memorandum. Page 5 of 36 Im 1 t 3 p� Ins 1000 yI f 4 F 4 I i x�W ,� 1 �^ ae enu.roxl o i ® r In r 3 if4 Y 1 av 1 �. I F try . la ul -n3.i L lif 1'+r. �o c. rue us, L1 . �� ii dx4 3 i , � iY.. f L°°=' s ,� a . :: ti. a 'x Legend } East Longwood Planning OLongwootl City Limits --° c mreereo rrsom x 3 T � East Longwood Facility Plan BFA Figure 1 Phasing Plan and Completion Status for Septic Tank Abandonment Projects g m LM N a r , f qry u s yam t2) r j � rffi t _ �I -liin BOOB '" oaw w inm Ave corn =v army r LONGDALE 3 'b flit I f f i cam P; �atl �� o" ar H 1 m t v, t *it'll, o.aILax. F v +m Ave o -Y 6 I� r uavwn L i PHASE 6 ;! nore„cwa KO oa _ 1 - 1 T FIae A�AJe O^ 0 1r PHASES { Saes wvF I ii i ws PHASE4 �� 'F �ji outI'S1 > T iY ' -1 •11� N• orrc RJGell vw r�'a0 os PHASE 2 r e } ' a iv ma - 7 � Fc. amo1, ti' Lam. : �i Borax A Are r%I//�1 - i n _ III re 1 Il a �� �C�� l O 4n e •-y � •. - • ��i�'/�,�1 P • 1I PHASE 3 1 , ffillt/ Ave =i �Ava,, d }` i tlx+ 1. "'` 4 'A'3c''a# ` -,-, 1f A _ dcc y initna Bl',L1 �s,�aeaecaamaeaa se rBawer wa re eampmeaarm conso-ucaon East Longwood Facility Plan ` +OIWEVIZWo :::sewer q AaP.A„s�aa�enaewan vnaea, Project Boundary and Planning Area Figure 2 — EaALonwwooE P�aonmJAma Location Map City of Longwood East Longwood Area Septic Tank Abatement Program + Phase 2 Thru Phase 6 6NGwooli " . /--- Florida 3.0 Background Information Currently the East Longwood Phase 2 area is in the design phase. Preliminary assessments have resulted in changes to the project goals which reduced the size of our planning area and changed the pump station location. A brief summary of the preliminary design conclusions and changes related to the East Longwood Phase 2 area are listed below: • Sewer improvement work along Church, Jessup and a portion of Palmetto Avenue was constructed during the Phase 1 construction which reduced the size of the Phase 2 planning area. • The original assumption of utilizing the existing Heritage Village pump station was determined less feasible due to conflicts with existing storm structures. • Limitations with this pump station site include insufficient property for a new wet well and access without negatively impacting the existing property development. • It was determined that the existing pump station at Acorn Terrace would be a more suitable location for a new pump station with a deeper wet well to avoid conflicts and the ability to expand the service area.In addition,the City owns the property and the adjacent storm drainage parcel providing adequate space to upgrade the existing facilities to meet City Standards and improve access while minimizing impacts to surrounding property owners. The redesign of the existing Acorn Terrace pump station will be incorporated into this assessment to best serve the phase 2 area and beyond. (Remainder of page left blank intentionally) Page 8 of 36 City of Longwood East Longwood Area Septic Tank Abatement Program Phase 2 Thru Phase 6 i ONcwoon ri .• rl 4.0 Service Area Characteristics The East Longwood planning area is located in the northeast portion of the City of Longwood's wastewater service area; south of Candyland Park, north of SR 434, east of CR 427 and west of Hwy 17-92. This planning area is approximately 0.87 square miles. 4.1 Existing Land Use In order to determine the existing land uses present in the project area, Department of Revenue (DOR) codes were analyzed from the current Seminole County Parcel database. Through this analysis it was determined that 468 parcels of the 500 within the project area were either Single or Multi Family residential parcels. Table 3 shows a full breakdown of land use and number of parcels. Table 3 Land Use Summary Land Use Parcels Count Single Family 346 Multi Family 122 Commercial - Industrial 3 Institutional 2 Governmental 1 Vacant 26 Total 500 4.2 Existing Roadways The City of Longwood neighborhoods associated with this project are located in urbanized areas with five basic types of roadways: Principle Arterials, Major Arterials, Minor Arterials, Collector Streets,and Local Streets. Page 9 of 36 City of Longwood East Longwood Area Septic Tank Abatement Program Phase 2 Thru Phase 6 LONGWOo It I 0 ric h Principle arterials generally carry most of the trips entering and leaving an urban area in addition to a large majority of the through movements bypassing an urban area. Generally,minor arterials interconnect with and augment the principle arterial system by distributing travelers to smaller geographic areas within a larger urban area. The collector street system provides access and traffic circulation to residential neighborhoods or commercial and industrial areas. Local streets are comprised of all facilities not included in one of the higher systems and permit direct access to abutting lands while deliberately discouraging through traffic movements. SR 434,CR 427,and US Highway 17-92 are the Principle Arterials near the project area. N Longwood Street is the Major Arterial adjacent to the project area.Grant Street,Church Avenue and Orange Avenue are the minor arterial roadways within the study area. All other roadways within the project area are considered local streets. 4.3 Topography Topography is an important consideration regarding the planning and design of wastewater collection facilities. Topographic data, as 1-foot contours, was used to determine local topography. Based on a review of Figure 3, which shows the ground surface contours, the topography can be summarized as follows: • Higher elevations are generally located at the northern center of the study area near the park with a high of 81 feet and slope towards the south east and south west. • The land generally slopes toward the local lakes with a low elevation of 64 feet. ( • Areas surrounding lakes have the greatest grade variation(+/-)5 feet. • Areas along Magnolia Avenue,Highland Avenue and SR 434 are generally flat. 4.4 Existing Water Facilities The City of Longwood provides water service to all the existing properties within the project area and Figure 4 shows the water distribution system within the study area based on GIS data provided by the City of Longwood. Seminole County confirmed they do not have any utilities within the project area. 4.5 Existing Wastewater Facilities The City of Longwood currently provides wastewater service within the project study area hi numerous locations as shown in Figure 5 Existing Wastewater Facilities. The existing wastewater facilities adjacent to non-served areas that are most likely to be considered for extension or modification in this plan are: • Acorn Terrace pump station existing gravity sewer runs along Magnolia Avenue and Oak Street. • Bay Avenue pump station existing gravity sewer runs along Bay Avenue, Pine Avenue, Wayman Street and Lakeview Street. • Fairmont Plaza existing gravity sewer runs along Bomar Court. Page 10 of 36 City of Longwood East Longwood Area Septic Tank Abatement Program Phase 2 Thru Phase 6 LONGWOOD) Florida • Georgia Ave pump station existing gravity sewer extends along Longwood Circle, West Court and East Court. • Longdale system is currently under construction north of Rosedale Avenue. • Pine Avenue "A"pump station existing gravity sewer extends to Palmetto Avenue to the north,Credo Street to the east,north of SR 434 to the south and east of Myrtle Street to the west. • Wayman Street pump station serves properties along Orange Avenue,Palmetto Avenue, Magnolia Avenue and Wayman Street. Currently a dry gravity sewer line runs along Georgia Avenue between Grant Street and Credo Street. Two (2) private pump stations are within the project area, one serves a retail shopping plaza located at the north west corner of the intersection of SR 434 and US 17-92 and the other serves a car dealership located north of the intersection of Florida Avenue and Bomar Court. All properties not currently served utilize onsite sewage treatment and disposal systems (OSTDS), also known as septic systems,for wastewater service. Force main discharge from existing pump stations in various locations but mainly along Credo Street, Rosedale Avenue, and Georgia Avenue within the study area. Table 4 summarizes available information on the pump stations. Table 4 Pump Station Data Pump Physical Flow Capacity TDH Station Address (GPM) (FT) Acorn Terrace 416 E Magnolia Avenue 230 71 Bay Avenue 538 E SR 434 No Data No Data Fairmont Plaza 600 North 17-92 500 43 Georgia Ave 307 Georgia Avenue 126 50 Mcdonalds 100 Block of North 17-92 400 Longdale Dead End of May Street 305 40 Orange Avenue 842 Orange Avenue 100 56 Pine Avenue"A" 454 E Pine Avenue 300 55 Wayman Street 419 N Wayman Street No Data No Data Page 11 of 36 City of Longwood East Longwood Area Septic Tank Abatement Program Phase 2 Thru Phase 6 LONGWOOti rio . ; da 4.6 Existing Storm and Drainage Systems Existing drainage systems within the study area includes primarily curb and gutter with some roadside swales that convey flow to drainage inlets and secondary systems. There are several drainage systems that discharge to retention basins and wetland areas at the intersection of Magnolia Avenue and Oleander Street,just south of the intersection of Warren Avenue and Oak Street,the intersection of Seminole Avenue and Lakeview Drive and the intersection of Lakeview Drive and Georgia Avenue. City of Longwood Stormwater Master Plan Drainage Structure Inventory Updates in Appendix B are maps provided by the City depicting general location of where the storm facilities are located but elevations are not included. (Remainder of page left blank intentionally) Page 12 of 36 .,,',yt AM* Wrel Ave kl S S; . a N x = ' ` �m S' .o � �Lk t•' R''a 9 ..'fY/arv' � u, 1n fir - SprTrin7rabd Cf `o-�0 3$� , i -. i 72 ayle pve re--.. 1 in = 800 ft ., _ w 7ath ova CorHamteW/' ! a kal: Tr ., �`w �_ . .Card I c,-04 _ 7^ ¢ '` t31hAVe � r 74on «d C y 73 " it 'Ira loo t I. /�OJ�6> - l `. ►i Art l N, n t m I Fr Ensl Luke �;- + � P 1. 79 4! ) rn 1 �. co P� lir \`0 �P 4 V75 �� '�a�4 �'' -7 � Mrs : & �� t^ R 66y. 69 , . A4 ?Iry Cti4 r r it � /t"Si may � Ilii1/11; c-h :l�Fi ; fit __staff)* "Atli �` r'r.. '15 7 \ •rannee7i7 , a I , f ,5 v eri• Ave ;I ,noln Ave Tenn W rr: g100._ '73 73 e 'sw. C art g 72 , . 1 •r + 5L41 r `r a_ t E"P .. 5t _ P na ut• ,• N .r F}: LIAM je 67 late 'oa• 7 A �.� l't. IPZ T 7o d_ , t®._ '�i`r Intent rental hlf i E n ' 0 76 •.. � �rt 5�\hone t p.11 Lah (� f( � �1`y� w -Lo kk VPlldm;?rc � i k Legend `Y t'�P i c �. - Contour g ♦ it�. m CI East Longwood Planning Area 7JI E Wildmeta Ave i _BEA East Longwood Plan 1 Ft ElevationFacility Contours Figure 3 —I e. Park ,_- - - pornte w _-. Camiyhi W, ,,- �u I - arP .� �"Cgrrylcry, t .le j ZieOrgta YC _ - E. A �d O is a .adena Ave _ �I(sy .:. F n SW r !Fr. fillifilli a _ _ E AHUr AVk I • I { • 'Waxen Ave: P m N , I rh . . St ap: E.BayAve +- .. :. Ava __ ' ''IL: I at eAve tin,,. : ij a fk7} - y e ke Wrtdmerd.'� �� �Yns ur 9i uent - 1 - u c vel grka0 4 ! y C unit'me t OIaeun t "'. L1h hlclm>rr.' m _ Legend Rf — Water Main - i 4. Fire Hydrant i EE]��7. OEast Longwood Planning Area $_je& East Longwood Facility Plan Figure 4 Existing Water Facilities clot ,; 41 s A pull ar�9i9� Jot /, f/ ��® C. —��f A _ _ t w 1.d�� s -- /°:, Cinch 600 fe-E ■ 1T A' - ®6 ■ Iir lmissummit a >a, JO l �� < �. a� i ni to p m �lA, % 19i I i�P6 Bt®1®■@iA9. A1�1 ,G4W ?iq ! 7 � • I i 1, n I I 1 I ! I or; I I �f 11 qtitstie 1 l� 1 +r� �'y� nu/ _--i (--, /),,,,ta,...-.1. i _ .....,-. ,-iiii = , 4-' ' - -::.-1111:-- 43-7 '*1 ------ L- -�ate�aa � = ■s E1199§ ®®I®® '®® �,, �®��' � , lii�� + F \ ', ®11 NIT w ^to 111 INII , 1i T L �111 11111= r■ y �I Ai�CMI I.. _;® p b wi elnnls® s�i�j'®I ,g,;. 4.A 'I' LIT—IT.- e,,,N.,e1 1'( ■ bas .7 ` ® �l` Eamo ®®..min aeo" , \L`— ii!fr—rJPCEI o �Bi1tl ■ I IIIhIIPIIL- I\ ' t —I C L ' R LI�� 7. � ¢ on,,,,, -■le t, ®AAAW ®®®®RAJ'as151111 C®flW'-r :®® w i lI i �.a c ' jl ,+' laa it a I, a _ . ,i 1 7 „ d _mom M. . . v East Longwood Facility Plan Figure s mi M,nnoei ry Pdvai.rma.e. Existing Wastewater Facilities City of Longwood East Longwood Area Septic Tank Abatement Program - Phase 2 Thru Phase 6 oNGwooi ,. Florida 5.0 Wastewater Flow Projections [ The following section describes the methodology used to estimate existing wastewater flow and develop wastewater flow projections for the project study area. Flow projections developed herein will serve as the basis for subsequent hydraulic modeling and system improvements. 5.1 Methodology for Development of Existing and Future Wastewater Flows Existing wastewater flow estimates and projections have been developed using a Land Use approach by applying established unit flow factors from the Seminole County Water and Sewer Capacity guidelines with existing land use and assuming full occupancy rates. Table 5 provides a summary of the wastewater level of service (LOS) based on land use utilized for the project study area. Table 5 Land Use LOS Land Use LOS Single Family 300 g/du/d Multi Family 250 g/du/d Commercial 0.1 g/sq.ft./d Industrial 0.042 g/sq.ft./d Institutional 3 g/seat/d Governmental 0.08/sq.ft./d Note:Gallons per dwelling unit per day (g/du/d), Gallons per square feet per day (g/sq.ft./d),Gallons per seat per day(g/seat/d) The following methodology was utilized to estimate existing and future residential and non- residential wastewater flows: • GIS was used to overlay and intersect project boundaries and parcel feature data sets and determine contributing land use types within the service areas. • Contributing land use types within the project service area were determined based on Department of Revenue (DOR) codes associated with the parcel feature data set. Vacant parcels not currently contributing to the wastewater system,as well as land uses that will remain non-contributing in the future,such as open spaces and parks were removed from the data set. Then contributing parcels were assigned a Land Use type consistent with those summarized in Table 3 based on the DOR code associated with the parcel. • Existing residential wastewater flow estimated by totalizing the number of single family and multi-family dwelling units within each service area;then multiplying the number of single family and multi-family dwelling units by the appropriate LOS to obtain the estimated residential base wastewater flow projection. Page 16 of 36 City of Longwood East Longwood Area Septic Tank Abatement Program Phase 2 Thru Phase 6 i5NGwoon • Existing non-residential wastewater flow estimated by totalizing the square footage of commercial,industrial,and government units within each service area; then multiplying the total square footage of commercial, industrial, and government units by the appropriate LOS to obtain the estimated non-residential base wastewater flow projection. • Existing institutional wastewater flow estimated by totalizing the number of seats of the institution (non-residential parcels) within the service area; then multiplying the total number of seats by the LOS to obtain the estimated institutional base wastewater flow projection. • Residential and non-residential base wastewater flows were combined to estimate the total existing base wastewater flow within the East Longwood service area. 5.2 Existing Wastewater Flows The estimated existing base wastewater flows for the East Longwood service areas calculated utilizing the methodology described above are summarized in Table 6. Table 6 Existing Wastewater Flow Land Use No. of LOS Total Flow Units (gpd) Single Family 346 300 g/du/d 103,800 Multi Family 122 250 g/du/d 30,500 Commercial - 0.1 g/sq.ft./d - Industrial 3 0.042 g/sq.ft./d 648 Institutional 2 3 g/seat/d 1,350 Governmental 1 0.08/sq.ft./d 449 Total ADF(gpd) 136,748 Total Units 474 Total ADF (gpm) 95 Page 17 of 36 City of Longwood East Longwood Area Septic Tank Abatement Program _= Phase 2 Thru Phase 6 LONGWOOD Flo ' idn Future Wastewater Flows There is one planned project within the study area and listed below are the assumed buildout of a number of vacant parcels (shown in Figure 6) within East Longwood Project Area that are projected to increase the total wastewater flow in the future: • Vacant Residential - BFA assumed 1 single family home will be constructed on each vacant residential parcel and used the appropriate LOS to obtain estimated future flow. • Vacant Commercial/Retail - BFA assumed that all vacant commercial/retail properties will be built out. For each property, the total building square footage is estimated based on the Mixed-Use category with a floor to area ratio (F.A.R.) of 3.5 as taken from the total parcel acreage. (F.A.R.=3.5 for commercial mixed-use properties per Longwood,FL Code of Ordinances, Density and Intensity for Infill and Mixed-Use Properties Table) The estimated future base wastewater flows for the East Longwood service areas calculated utilizing the methodology described above are summarized in Table 7. Table 7 Future Wastewater Flow Land Use No.of LOS Total Flow Units (gpd) Single Family 371 300 g/du/d 111,300 Multi Family 122 250 g/du/d 30,500 Commercial 1 0.1 g/sq.ft./d 1750 Industrial 3 0.042 g/sq.ft./d 648.48 Institutional 2 3 g/seat/d 1,350 Governmental 1 0.08/sq.ft./d 449 Total ADF(gpd) 145,998 ( Total Units 500 Total ADF(gpm) 101 (Remainder of page left blank intentionally) Page 18 of 36 N - '81 I _rr l PMIrr� p' - i - v- - , i;.!!fl fi a u.1,,i, U 1 - - ' _ .Sprfigvrood Cl - r t_. ' ` — r �' U ", .ri�dt ' E:--: Ava _ • / ,ff� a taf ilfff ' lL i 1T tin = 800 ft e tsm Ave carpamteW-ay { - 4 f"ftF 17 } i } 3., • ",.« len :... ti. Y" t { tl.. y,_t� '� can _ . / � . ,y'�' - . {7 Lurta5..� �au+r.is.t� { _ ' _ . 13ih Ave ro ' ,.�"F ", �-T. , _ I..-r > I ' . e d VACANT DEVELOPMENT ry :!I f 1 r { ` (--` P $ { I FUTURE DEVELOPMENT L _q t �r� n�s I I [ 7 1 ' t I-I t I"1 t z. t�.` (10}LOTS , , ` rsr�rr51L a _ liment pr 11?_ ■1r- h11I � �i- r 11 n1 , pv iiii ' Ea,k Like i 1 . ( y- a.: }Ifp I{- liil Si- - -- I®� Ivg . t � f 1 )), ■� it G IIIIII Mt In + fi. i -k I. , r 1 _ Its Htit 1 1,�;1 I `f :::::' +. t t 1 -,.. r # '_ a m VACANT WATERFRONT I t Yii I II J r � 1 1 ° �I � � IT:rr>{}� � f� � t - t - am-. l � I lL� - a � ts :� I I1r I F rft �{ ,. > 6 014ii'A, ..'.: rtt I fF s le C l' { VACANT COMMERCIALII ¢ A 4".) }, �l I{- - '1r. ..� GFbW., or`•t r } J i- I 1 ��nne® Hi I . ' “c" ` T I I I J I'I.11 I tli iiti °_ ■ ■■ L 4t -` • I x 11 • vH {- tr i t l '` 1 p I 4 C � Ave l � } q F tea.Au)a -yt '- � �AeA , c _ t f, j• r P ,.qp t +e 1 11 ? R`� r - - - - LynsDc ' Ho Legend ergreen ve LS&o Wridmerc WnceiitPl i East Lon wood Plannin Area - - .. M 9 9 - 8isifir_�AYe I Single Family L_J multi Family Lag2 G\\louetteCt FvrnL.,Y Industrial n Institutional {Et >`[?, Governmental w CVacanl m Roli Gv - l i, Ave m I.. 1 Served Properties -.. .` N - - - - _ " rift ,'o.., E WUdmdtB"'Ave - - o : ..: -- :— u -. E Wilrlmere'Ave {'i ti _ East Longwood Facility Plan C Figure 6 Existing and Future Flow Parcel Land Use City of Longwood East Longwood Area Septic Tank Abatement Program =4 w Phase 2 Thru Phase 6 LONGwoO1i �' Florida 5.3 Peak Hourly Flow The City of Longwood requires the design of all wastewater systems based on peak flow,which is the product of a peaking factor and the average daily flow(ADF).The design peak hourly flow (PI-IF)is defined as the largest volume of flow received during a one-hour period and is the flow factor typically used for pump station,collection,and transmission system design.Table 8 below summarizes the City of Longwood Standards for Peaking Factors. Peaking factors were selected based on the existing and projected wastewater flows shown in Tables 6 and 7. Table 8 City of Longwood Peaking Factor Standards Flow Range (GPD-ADF) Peaking Factors (PF) Flows to 100,000 4.0 100,000 to 250,000 3.5 250,000 to 1,000,000 3.0 Table 9 below summarizes the existing and future peaked wastewater flows recommended for hydraulic and capacity analysis for the East Longwood Area Facility Plan. Table 9 Existing and Future Peak Wastewater Flow ADF ADF Peaking Peak Hourly (GPD) (GPM) Factor How (GPM) Existing 136,748 95 3.5 333 Future 145,998 101 3.5 355 (Remainder of page left blank intentionally) 1 Page 20 of 36 City of Longwood East Longwood Area Septic Tank Abatement Program *+ - Phase 2 Thru Phase 6 LONGWOon Florida 6.0 Development and Evaluation of Wastewater System Alternatives 6.1 City of Longwood Standards and Design Criteria The preliminary design and layout of project alternatives have been developed in accordance with the City of Longwood Manual of Standards current edition and standard design practice. Gravity Sewer Conceptual Design Criteria • The minimum gravity system pipe size utilized in design is 8-inch diameter. • Slope shall be such as to maintain 2 ft/sec minimum velocity when flowing full, or half full when calculated using the Manning equation with a roughness coefficient(n)of 0.011. Based upon the City of Longwood Engineering Standard Manual (ESM), the minimum design slope for 8-inch gravity sewer is 0.4%. Also, an additional 0.1 ft elevation drop is added where there is a directional change in gravity flow. • Service laterals will be constructed in conjunction with the collection system from each property line to the gravity main with a minimum of 3 ft. of cover 2 ft inside the property line. • All gravity sewer facilities will be located in existing public rights-of-way or proposed easements. • Manhole invert elevations shall not be more than fifteen (15) ft below grade elevation, unless approved by the City of Longwood. • Minimum cover over the invert shall be 4 ft. • City will be responsible for all work required for on-lot facilities (septic tank demolition and connection to the sewer lateral at the property line). Property owners will assume responsibility for on-lot facilities after construction completion. Low Pressure Sewer Conceptual Design Criteria • The minimum pressure pipe size utilized for design is 2-inch diameter. • Hydraulic design shall be such as to maintain 2 ft/sec minimum velocity during normal operating conditions. • LPSS force main shall discharge to an existing gravity sewer system by connection to a manhole. Discharge to existing force mains shall be avoided. • Clean-outs and isolation valves shall be provided at all junctions and major changes in pipe direction,and every 500 ft. • An emergency pump-out connection structure shall be located at the upstream end of all pressure main branches. • A minimum cover of 3 ft. and a continuous upward slope of the pressure mains shall be provided to maintain positive pressure at all times. Page 21 of 36 City of Longwood East Longwood Area Septic Tank Abatement Program =R e • Phase 2 Thru Phase 6 LONGWOOt1.. Florida • Service connections will be constructed from each property line to the pressure pipe with a minimum of 3 ft. of cover at the property line. • City will be responsible for the installation and operation of all on-lot facilities(septic tank demolition,grinder pump installation,and connection to the pressure pipe at the property line). Property owners will be responsible for the operation and annual maintenance of on-lot facilities after construction completion. Low Pressure Sewer Systems (LPSS) will utilize grinder pumps (GP) which use a self-contained holding tank and grinder pump as a replacement to the septic tank. GP units operate similar to a small private pump station with a grinder pump that grinds the solids in the sewage flow and discharges it to the low-pressure sewer. LPSS systems have higher O&M costs when compared to typical gravity systems because of electrical costs for the grinder pumps. Grease buildup and clogging can be a problem if adequate grease trap pretreatment is not provided upstream of the units. Abandonment of the existing septic tanks will be required in accordance with regulatory requirements. Pump Stations Conceptual Design Criteria • Pump station type will be duplex submersible. Wetwell sizing shall be based upon a maximum pump cycle time of ten (10) minutes (max 6 starts per hour) and 6-foot minimum diameter wet well. One(1)pump shall be considered stand by only. • Stand by power shall be provide at all pump stations,unless otherwise determined by the City of Longwood. • Pump station site will be located inside the dedicated R/W, City owner property, or easement. • Pumps shall be capable of meeting all system hydraulic conditions without motors overloading or causing any adverse effects to pumps,including satisfactory performance at low head and pump run out conditions. Force Main Conceptual Design Criteria • In general,a minimum velocity of 2 feet per second(fps)and a maximum velocity of 5 fps will be used for main size selection. • The minimum force main pipe size utilized in design is 4-inch diameter. • Design calculations will use Hazen-Williams's "C" factor of 120 for peak design conditions. • The force main shall be located in existing public rights-of-way or proposed easements. Depth of cover shall be 3 ft.minimum. 6.2 Wastewater System Alternatives Development Development of conceptual sewer layouts to serve properties within the project area initiated with determining the potential to extend existing gravity sewer within each subarea without the Page 22 of 36 City of Longwood East Longwood Area Septic Tank Abatement Program Phase 2 Thru Phase 6 LONGWOOID need for a pump station.Where this could not be accomplished,low pressure sewer,or shallower segments of sewer was considered. The conceptual layout developed minimized new pump stations required and maximizes the use of existing pump station sites. For a comparative analysis,low pressure sewer to all unserved areas was considered as a separate alternative. Three different alternatives including a "no action" approach was considered as options to provide sanitary sewer service to the East Longwood Area. Alternative 1 No Action - This alternative consists of the City not extending wastewater service to the properties in the East Longwood Planning Area. This would result in residents continuing to use septic tanks and drain fields. Alternative 2 Gravity Sewer, Pump Station and Force Main Extension - Alternative 2 is the utilization of conventional gravity sewer extension of the existing collection system to the greatest extent possible as well as the inclusion of an additional collection system with pump station and force main to serve additional areas where needed. The following approach was taken to develop this alternative: 1. Extend existing gravity sewer from areas identified in previous reports and already accounted for in the existing pump station capacities. This would include areas to the east and west of Phase 1 (major portions of Phase 2 and 3), and south of Longdale (most of Phase 5 and 6). Refer to Figure 1 for original phase boundaries. 2. Develop gravity sewer plan extending from the proposed redevelopment of the existing Acorn Terrace Pump Station site. The need for a new station in this location was identified during the preliminary design for the East Longwood Phase 2 Septic Abatement Project. This extension would include all of Phase 2 and small portions of Phase 4 and 5. 3. For the remaining unserved properties,consider other existing gravity systems where the existing grade,invert elevations, and proximity are most beneficial for gravity extension. This would include extension of the Orange Avenue PS system to the west along Pasadena and Orange Avenue and extension of the Waymen Street PS system along Waymen Street and segments of Magnolia and Pasadena Avenues,and Lakeview Drive. 4. Optimize the overall gravity sewer layout by avoiding major storm drainage crossings and potential parallel conflicts. Figure 7 provides a conceptual layout of Alternative 2. Alternative 3 Low Pressure Sewer System-Alternative 3 is the utilization of LPSS for all unserved properties. This alternative would consist of the City constructing a small grinder pump station(GPS)at each property which would be maintained by the property owners. The GPSs manifold into a LPSS force main network that would discharge into a nearby sanitary manhole. The following approach was taken to develop this alternative: Page 23 of 36 City of Longwood East Longwood Area Septic Tank Abatement Program b ; Phase 2 Thru Phase 6 LONGWOOIJ Fl u r i dx 1. Utilize the same general subareas as in Alternative 2 because the LPSS force mains require discharge into a nearby existing manhole. Also connecting to nearby manholes will limit { the amount of flow through these LPSS subareas and keep the required pipe size smaller (2-4 inches in diameter). 2. Force main alignment is set based on maintaining a slight upward slope towards the discharge to maintain a positive pressure.Topography within each sub area was reviewed and pipes aligned so they connected to the existing manholes that sit at relatively higher elevations compared to the upstream end of the pipe network. 3. Limit the amount of connection to existing manhole to two (2) or less per subarea. This simplifies the layout and reduces construction disturbance because most existing "connection" manholes are located at the center of intersections. Figure 8 provides a conceptual layout of Alternative 3. 6.3 Downstream Pump Stations and Force Main Capacity Analysis The following section provides a summary of the capacity for the existing downstream pump stations adjacent to the project area that are presented in the alternatives as points of connection. These pump stations have force mains that manifold into the City's force main network that ultimately discharges to the 8-12-inch force main along Credo Avenue that discharges to the Grant Street Master Pump Station at Candyland Park. BEA's previous design for the Longdale and Pine Ave"A" pump stations accounted for expansions into the East Longwood Area. Data from these previous reports will be utilized as part of this evaluation. Pump Station Capacity Analysis Existing capacity was determined based on data sheets and pump curve data provided by the City, which indicates the installed pumping capacity of the lift station. All pump stations considered are duplex, therefore firm pumping capacity is equivalent to one pump operating at each pump station.Pump Station subareas were determined based on parcels adjacent to gravity sewer upstream of each pump station. Figure 9 shows the existing and future subareas for the Pump Stations. Wastewater flows for each downstream lift station were aggregated utilizing the land use methodology previously described. Existing and future estimated peak wastewater flows were compared to firm pumping capacity to determine if adequate capacity is available. Table 10 provides a summary of the capacity evaluation for these downstream pump stations considered for connection. Page 24 of 36 City of Longwood East Longwood Area Septic Tank Abatement Program `?tr Phase 2 Thru Phase 6oNcwood " "' Pl oildz Table 10 Downstream Pump Stations Capacity Evaluation Pump Capacity Existing Existing Future Future% Capacity Station r Peak Flow / Peak Flow Upgrade Name (gpm) (gpm) Capacity (gpm)2 Capacity Needed Acorn 230 25 11% 151 66% No3 Terrace Longdale 305 180 59% 305 100% No Orange 100 60 60% 90 90% No Ave Pine Ave 300 177 59% 276 92% No Wayman N/A 49 No Data 81 No Data Unknown St 1. Based on data provided in previous reports and pump curves where provided. 2. Includes known development projects and vacant parcels; Longdale and Pine Ave "A" data from previous reports. 3. Acorn Terrace pump station requires upgrades due to upstream gravity system conflicts. All pump stations have adequate existing capacity to meet current and future flows with gravity sewer extensions into the new study area. The Acorn Terrace PS has existing capacity for future connections,but the upstream gravity system needs to be lower overall to avoid numerous storm pipe conflicts. The City has provided the Acorn Terrace PS site as the best location for a lower wetwell for the expanded gravity system throughout the East Longwood Phase 2 project. A more detailed assessment is included in the East Longwood Phase 2 Septic Abatement Project Preliminary Design Report. This assessment does not consider other potential hydraulic restrictions within the force main network that may affect pump performance. Actual operational data and feedback from the City should be considered in addition to the capacity evaluation as a basis for pump station improvements. (Remainder of page left blank intentionally) Page 25 of 36 I I I _ das �4 =pm ma In 1111 y ®n t o... . ® àk ii. alit mmicisimmi,_.ffist irra ii, v es veer" 211_ 1 liat _.- I■. I - I a it r J c 1 �� ■.e er �a v7 1+ a^ r' .� a® \I®®®!A®®®g.(1A ®®,.- p I' �� A '' .1 ' ' '''-)+- + OAP , —em1 Q - *fr rr r /iii`mi®mn 11! 111 111111 I®®®■ 11�_� m i mir rm rneg ismaa ■111111�a1®11Ij.I ii. Illlll�f .1 MO If oiiili®r • / raar AP LI111i 11111110 i�11. 111 Im■■ s -- 4s� Pi♦� 1 � a�. 11i■■j11111�■IIi�11M�11i11 .4�� ,i !1$ ®1►® te stmiNi ;aeaii i■I.PL1911u®iI:lrrr 7tif1'i^.. -"S 1®7� I Ira e am all ■ 1111`.e tI ®c y1011a ;III'► 1111'r li. � 2- �.q, s � � ty kb le �0 ^� ArW�I'17° dA�®arse WWI 111®a �I �� -cw.E•y. .a�rr� ( ,/ � I �'.11,1 win mma n �t �aIft!! .- t ® sem xi n+ u,2 �� d �� it f111i9 ®q s +CI 1m9l111111 �r1� 1i�1111 , .- 'amm. ,—,y a //1 asset_ ®e m +e,r- .5 %„mr ar -.sea a®r ®m" 1 m�+'�$`II 1I . rmpRISMI ®emit® .® rr a®Isilfs Ia®ffiICI kl ®Ta I:37w:a "®®see^ale®®.�ina i®®a®�a ,® _ g®� _' sffi l➢ptaill� � ® ` v ®�i�.. 1,F_>Faaq�a� v A 3 _. �+ )® %� n C ni ■I—..1s ' e ®®e m �� may i. rerr. r % . m ��2 ® ��1ii is ryry ,iri,sal4 =G 9 Ul ��®®rt 1ra�1�� a ■Es r'ac _ f� sip an iI milt ii ty +_ .xa4__ em ++ R. East Longwood Facility Plan ELENA Y M--: N°Ymen 61 �7rOnpO elcmNry eOWe. -1 eai se,.ee vmwn.. Gravity Sewer,Pump Station and Force Main Extension Figure? ^ — --ca nr s.we t- :3or.,�oa.n �eev nor om n.nm'1 ' Alternative2 KI/ r k` a al . \ �� wUf-- t✓�/ c, �.®� mite®® os ��q„—. 2nsoo 2. il i--- ;,,,,ii _—_--r,-------4---r-u-4---,b,- 1-2 ►,�.> "� - Y■ _ ram, oo,r w, ( z�-�-.® q3!iir41 ri 47 � r. _- 4,_,__,_ 1 19 iii[,11-- ®B i® BiEI1i— la`s —i q I1 IILI 2-1 ll - q1�fJ/StJL:J%i � ' > —I / 1111.110111 mnr 11. j 1' I I l ,�®A® ®E®®IV911 ®� 11 rUH Y3 I �� l 2� ■ _ .,,i�et�mil 1gry�eg@g■1'$ . �'Qi �.—� 1t J�;;, Cor �, ' I - '� 1 r--��f� F li (r� t'F- �®)�1�1�ti' tl�� os��a Hcnm�r^£I r �1111 c fh1 if I-� r ,a-, ® :' ur ®®ialnfm[ ° e . ! ® : ,-8 l = . ,, I_ if 11i 4`f1- i �° `,jl >�yet ate' ee°11 n " Ielm m111 a r.., ivi a 1�. �efi .d -b,. '� d sat msg �L° a m_ . 0�* ., _H ,i 3 ®e°ei�� a ® a o f x o b? 4uT g�ig 9. o s N 'c- I i 1 1Ie ..I • 01I C . I't 1D ®e L f :I III -��' Ali— I( �I tal of _..� iJ ro7a _^I L — T-1➢ w9lale- _ J i -. � \ ( 1 a_ I I 1 I � �� I •�I I��f .IaRtl-'LJ �t�^ '. BFA • P m,:, ^ East Longwood Facility Plan M;Me�o v a.w,a Low Pressure Sewer System(LPSS) Figure 8 Alternative 3 I 1 i ff !�( - I , ..c"a null ct , Y ■—infirm_ Q li i, In soo �rt ��d :� m L �. „`' r /- -fi + I � u - / V 1 i. T `I 11°© ��� p; �I 11 l_ �� d �� r T - e rl(' ,ne n� 1■silann �l11 iv 11 t r u r � / �'� 1 I:I -Ien1®®® ®�i�®■ ® iaai� I u 77r B ! ' - �i I �rL 9 _, T"iti ''1:»r , .4_k a ,iw� -T a r to ' 11, -``I -- sararuin tr ( - ®rill, A� '' 1'` � ' / H 11111 ` Ie _ If1 1 1�1 I I Nt 1 - 1 r ® ■ .. e m-®o - ene® d�11 �I ;ivy ®a Ir R „,„„in ®=®.■. gli ] +��1 I' -� :A a II®ll l ii ' L. nnm■■®■ ■ 9■9■! % o EMI)H : EMUµ ® ■-■//A■■1N 1,7t1 '� t. ; ■■■ i11 �1� , =,a 14 i I�I®i �Ii ...m _�� 1>' t f� ' �'— ono *a - �' • w psthe ENS ATI Terse varm'"area /Arae m n •m"aaa. Q�.ua"a„eve a..a"gn,ea East Longwood Facility Plan Figure 9 11" __ "rte a" or'"se^°°"°° Existing and Future Pump Station Subareas g kf 1 City of Longwood East Longwood Area Septic Tank Abatement Program 4'b Phase 2 Thru Phase 6 LONGWOOJ . • Florida Discharge Force Main Capacity Analysis Design criteria for force main velocity ranges from a minimum of 2 feet per second (fps) and a maximum of 5 fps when selecting force main size. An assessment of the existing discharge force mains from the five (5) downstream pump stations identified as potential connection points is provided in Table 11.The peak future flow to each pump station was used along with the existing force main size to determine the velocity of the discharge force main from the respective pump station.This capacity evaluation represents only the first segment of the discharge force main up to the point of connection to the larger manifold City force main network as shown in Figure 5. The Pine Ave "A" discharge force main would need an upgrade for the replacement of the existing 4-inch force main with a 6-inch force main for approximately 240 feet. Table 11 Force Main Capacity Evaluation Pump Station Future Pipe Size Velocity Length Name Flow Acorn Terrace 4-inch FM 151 gpm 3.9 ft/s 1,970 ft Longdale 6-inch FM 305 gpm 3.8 ft/s 1,912 ft Orange Ave 4-inch FM 90 gpm 2.3 ft/s 960 ft Pine Ave "A" 4-inch FM 276 gpm 7.6 ft/s 240 ft Wayman St 4-inch FM 81 gpm 2.1 ft/s 700 ft Actual operational data and feedback from the City should be considered in addition to the capacity evaluation as a basis for force main improvements. 6.4 Evaluation of Wastewater System Alternatives The evaluation methodology is intended to provide a general approach and guidelines used during the evaluation process. In general, hydraulic design criteria was used as the basis for sizing and capacity requirements for specific elements of each alternative.Capital costs associated with each alternative were estimated based on the recommended facilities as presented. Economic and non-economic factors were then used to compare alternatives to determine the most feasible alternative for implementation. Page 29 of 36 City of Longwood East Longwood Area Septic Tank Abatement Program Phase 2 Thru Phase 6 1115NGwooti Florida , The following is a general summary of the advantages and disadvantages associated with Alternatives 1,2,and 3. Alternative 1: "No Action"Approach Advantages Disadvantages • No disruption due to construction • Potential septic tank failures, resulting in activities. costly replacements for the homeowners. • No additional maintenance required for • Public health threatened by failing septic the City of Longwood. tanks. • Continued excess nutrient runoff into nearby lakes and streams. Alternative 2: Gravity Sewer,Pump Station,and Force Main Extension Advantages Disadvantages • Lower operational and maintenance • Minimum pipe size of 8-inches. (O&M) costs associated with • Higher construction costs due to pipe size the gravity sewer component. and depth requirements to maintain • Very reliable and the City is familiar with minimum slopes and avoid conflicts. O&M of gravity sewer, pump station,and • Manholes required at maximum intervals of force main systems. 400-ft. • Power outages have minimal impact to • Inflow/Infiltration (I/I) increases with the property owners connected to age of the system. gravity sewer systems. • Construction activities are very disruptive. • No additional O&M costs to property • Congested corridors with existing utilities owners on gravity sewer systems. and drainage infrastructure increase • Increased property values construction costs. Alternative 3:Low Pressure Sewer System(LPSS) Advantages Disadvantages • Lower construction costs due to smaller • Flushing connections required at regular pipe size and trenching requirements. intervals and terminal locations. • I/I minimized. • Grease buildup reduces system performance. • Less disruption during construction • Pumping systems are required at each • Construction can be accommodated in connect to the system. highly congested corridors with existing • City unfamiliar with LPSS; would result in utilities without significant cost increase. increased O&M costs to the City. • Increased property values • Aire release valves required at high points in the system. • Long term power outages can result in overflows. • Public education requirements for property owners for O&M of the GPS,emergencies and how to avoid blockages. Page 30 of 36 City of Longwood East Longwood Area Septic Tank Abatement Program Phase 2 Thru Phase 6 LONcwoofi Florida Construction Cost Development A present worth analysis has been developed for each acceptable alternative. The cost of maintenance and replacement of septic tanks in the project area,including adverse impacts to the general public and environment make Alternative 1"No Action" unacceptable Capital and O&M costs as well as the present value for the acceptable Alternatives are provided in Tables 12 and 13. The present values were determined using the following information: • Planning period of 20 years. • Discount rate of 2.9%. • Estimated construction costs. • Estimated maintenance costs. • Construction capital and O&M costs for Alternatives based on recent costs for similar projects and the 2010 Performance & Cost of Decentralized Unit Processes published by the Water Environment Research Foundation(WERF) • Cost prices escalated to 2021 dollars based on the Construction Cost Index published by Engineering News Record (ENR). Table 12 provides a summary of the estimated construction cost for Alternative 2. Table 12 Alternative 2 Cost Estimate Description Number of Cost per Home Estimated Amount Homes Materials and Installation 513 $ 22,000 $ 11,286,000 Seminole County Capacity 513 $ 3,175 $ 1,628,775 Annual O&M Cost 513 $ 669 $ 343,351 Present Value of O&M Costs $ 5,167,732 Construction Contingency (20%) $ 11,354,670 Total Present Value of Alternative 2 $ 29,437,178 Note:Septic tank abandonment and plumbing work on private property is included. Page 31 of 36 City of Longwood East Longwood Area Septic Tank Abatement Program Phase 2 Thru Phase 6 LONGWOOID 1 l F I o r i (I a Table 13 provides a summary of the estimated construction cost for Alternative 3. Table 13 Alternative 3 Cost Estimate Number of Description Cost per Home Estimated Amount Homes Materials and Installation 513 $ 15,500 $ 7,951,500 Seminole County Capacity 513 $ 3,175 $ 1,628,775 ( Annual O&M Cost 513 $ 1,097 $ 562,812 Present Value of O&M Costs $ 8,470,819 Construction Contingency (20%) $ 1,590,300 Total Present Value of Alternative 3 $ 19,641,394 Note:Septic tank abandonment and plumbing work on private property is included. Economic and Non-Economic Factor Comparison In addition to construction cost comparison, the acceptable alternatives were also compared based non-economic factors. Relative scoring criteria and considerations associated with each factor are summarized as follows with each alternative being scored on a scale of 1 to 3. Each factor is also assigned a weight based on relevant importance to the decision-making process. 1. System Reliability/Operational Concerns Alternatives that have a proven record of reliable service,minimal operational concerns and are familiar to the city receive the highest scores. (35% Weight) 2. Community Acceptance Alternatives that would have the highest level of community objections or concerns with on-lot facility costs and O&M requirements would receive the lowest scores. (30% Weight) 3. Disruption Due to Construction Alternatives that involve construction activities that would have the highest level of traffic disruption or commercial access issues would receive the lowest scores. (15% Weight) 4. Present Worth Costs Alternatives that have the highest present worth costs relative to the other alternatives would receive the lowest scores. (20% Weight) Page 32 of 36 City of Longwood East Longwood Area Septic Tank Abatement Program "* Phase 2 Thru Phase 6 LONcwoon Florida Table 14 provides a summary of the scores assigned to each alternative based on the economic and non-economic factors described above. Table 14 Comparison of Economic and Non-Economic Factors Alternative 2 Alternative 3 Factor Weight Score Weighted Score Weighted Score Score System Reliability/ 35 3 105 1 35 Operational Concerns Community Acceptance 30 3 90 1 30 Disruption Due to 15 1 15 3 45 Construction Present Worth Costs 20 2 40 3 60 Total Score 250 170 6.5 Recommended Alternative Comparison of the economic and non-economic scoring presented in Table 14 for the two alternatives considered indicate the following: System Reliability/Operational Concerns Alternative 2 is entirely gravity sewer extensions,pump station and force mains and exhibited the higher score because the City has an extensive and successful track record of reliable service with very few operational concerns when properly maintained. Low pressure sewer systems can be less reliable than gravity sewer systems because there is a higher potential for failure of the grinder pumps and clogging within the pipeline. Community Acceptance Most communities are familiar with conventional gravity sewer,pump station and force mains that require very little maintenance by the property owners once connected to the system,and generally prefer gravity sewer instead of low-pressure sewer connections.With this project,the property owners would be required to cover the cost of operation and maintenance of the grinder pump stations. Alternative 2 being entirely gravity sewer was scored higher. Disruption Due to Construction Alternative 3 scored higher because it requires shallow trenches that can be installed outside of the roadway and minimizes traffic disturbance to roadway traffic during the duration of construction.Alternative 2 scored lower because deeper benches are required which increases traffic disturbance and construction duration. Page 33 of 36 City of Longwood East Longwood Area Septic Tank Abatement Program r'wR Phase 2 Thru Phase 6 LONcwo r" Present Worth Costs: Alternative 2 received a lower score because the total present value is about 50% higher than Alternative 3. Alternative 2 has the higher combined score of 250,as depicted in Table 12 based on comparison of both economic and non-economic factors.Alternative 2 is recommended for implementation. } Page 34 of 36 City of Longwood East Longwood Area Septic Tank Abatement Program �`'• Phase 2 Thru Phase 6 LONGWOOI) - 7.0 Project Implementation and Phasing Based on the recommended alternative,a new phasing plan was developed. Project phasing boundaries were redrawn where necessary but stayed within the original phase boundaries where possible. Generally,future project boundaries include an average of 100-120 parcels. Pump station and force main upgrades were included with adjacent gravity sewer work where possible to reduce construction cost and neighborhood disturbance. Figure 10 includes a map of the new phasing plan.Table 15 includes the estimated costs for each phase and recommended implementation schedule. Table 15 Project Phasing Cost Estimates and Implementation East Longwood Number of Cost with Septic Cost without Septic Implementation Project Phase Homes Abandonment Abandonment Schedule Phase 2 122 $ 3,608,150 $ 2,562,000 2021-2022 Phase 3 90 $ 2,445,750 $ 1,890,000 2022-2023 Phase 4 119 $ 3,233,825 $ 2,499,000 2023-2024 Phase 5 90 $ 2,445,750 $ 1,890,000 2024-2025 Phase 6 92 $ 2,500,100 $ 1,932,000 2025-2026 Total 513 $ 14,233,575 $ 10,773,000 Page 35 of 36 y _ Imo[ 1 "llla�L/ �( 1 , J . �� " I , Fri, � � 1 „Is 1 i 'E q. -h lI , I -- I I IrI la]r 1 J I 7 it ( i I 'L {� alp ---1 in eoa- ;LTA' IcI1 �(- it If ighm c '''' c�t .LONG DALE '�� 11;r1 Y I � s R n c i1114 ®1crgf, 7T � ih rk,L 1 � I Ic7I -P I it I ,,> . 'r t .. �ryt1/ Jill Pai-13 _: lil lc' II,iw l4 / I ; g1 a, �r1R I ' In 'I . - ffilms Cf1 ttr _ I + _ yli �l���� �i J J I� � � ���e' � I rl y I■� PHASE 4 ��O Par els)7 _._-eil�J� � �T 4 ii- / / 'Sittig i (119 Parcels) - I-1 � ff I 1\pl Y /1 7I lF'.. �i'T 1 fiA F'T i�{� - -f� Y y 1L eodi ravo / 1l-'-� -b-i - I1 I y I F { i t '� 1 �" ` `= d' - tip �� y �� 'in rtt .J Shy `w {� PHASE 2 crig� PHASE 6 L � _ 1 1i{I J s �r (- X7� Parcels�� €� � --J �I� { �j ^^� +7i vY'�_i I 1 ' L+ -y�( i r7 'ss0r 3 :IINEf� k- dh-I 'fl L { { �� t��r 1 f / si n I 1 � _ I}G { saran � � ti °III v.}' s L' i i'v� q ��' HI L, <r�., � I -�) � �� o J tin! r 7 11 1 I II-Wt 13 J �110 M � I� i� � � 11 � r„ ) d J. I� � ���9� i`—I a t'&"' i � � �_I r i Icykx:.I In' . e J I C p �d77 PHASE 7 ) 'PHASE 3 :unit - I1 1 Z�! L LF 9a Parcels �'- ■ 3 a �LLa�—-- i11ipsi1®11f....).„ .H 7- ®aiO�t L.e.f L S� I I { ._ ) ,�. �'. , {t --I� �1 cc 9i ®. 1 d 1 :t ,rr a T I L KI ➢ s7 S' .® 1 r 7 owma ��. 1 ww n..�,rtr I r `�i�e� i _ i 7 r,� - r �' I �1 �1 f � I ao: I l I I I � � IH " [ 1 "/1 4 o h 1 I I Tr'I T -1 , - 1[( 13,E _ --,I I L.firf , [ �u � 1 e m :T l�� i ' I ..i _DE A. Completed or Under Construction East Longwood Facility Plan —city Existing Gravity sewer New Project Boundary and Phasing Plan Figure 10 nEast Longwood Planning Area Location Map City of Longwood East Longwood Area Septic Tank Abatement Program `. Phase 2 Thru Phase 6 lONGWOon APPENDIX A PROTECTED SPECIES LIST Protected plant and animal species occurrence records for Seminole County,Florida from the U.S. Fish and Wildlife Service(USFWS) and the Florida Natural Areas Inventory (FNAI) databases Plants Scientific Name Common Name Federal Status State Status Carex chapmanii Chapman's Sedge T Centrosema arenicola Sand Butterfly Pea E Cucurbita okeechobeensis Okeechobee Gourd E E Dennstaedtia bipinnata Hay Scented Fern E Illicium pary florum Star Anise E Lechea cernua Nodding Pinweed T Nolina atopocarpa Florida Beargrass T Ophioglossum palmatum Hand Fern E Pecluma plumula Plume Polypody E Pteroglossaspis ecristata Giant Orchid T Pycnanthemum floridanum Florida Mountain-mint T Salixfloridana Florida Willow E Amphibians Notophthalmus perstriatus Striped Newt C N Birds Mycteria americana Wood Stork T FT Aphelocoma coerulescens Florida Scrub-Jay T FT Reptiles Drymarchon corais Eastern Indigo Snake T FT Gopherus polyphemus Gopher Tortoise C ST Mammals Trichechus manatus West Indian Manatee E FE Legal Status C Candidate species for which federal listing agencies have sufficient information on biological vulnerability and threats to support proposing to list the species as Endangered or Threatened E Endangered:species in danger of extinction throughout all or a significant portion of its range T Threatened: species likely to become Endangered within the foreseeable future throughout all or a significant portion of its range FE Listed as Endangered species at the Federal level by the U.S.Fish and Wildlife Service FT Listed as Threatened species at the Federal level by the U.S.Fish and Wildlife Service N Not currently listed,nor currently being considered for listing City of Longwood East Longwood Area Septic Tank Abatement Program Phase 2 Thru Phase 6 LONGwoon ' APPENDIX B CITY OF LONGWOOD STORMWATER MASTER PLAN DRAINAGE STRUCTURE INVENTORY UPDATES tL aF p , ® I N o k5 y - p \_ C� C V �® - _ N ! N` 55 I ' W�_ D 4'W_ H I c® a � p�- ' u � Y fl - —11 ~ m __ �gflT ®: Lrc' "- BBB$- B �`EL� _ xi r � d ��"✓ � � _�Y bra' 4 S : I p I : I o aa; off` I , I . : el ® I 0 ITII ii„:4,,i,,::„::::,.i.,:yt,::!, i, : : ,Tsy,,,,. ,,..J:,,,y,,,,,,::„,,, :i ;.:,:s.J., ::: 1 .:i,, L0 Iw © IS® - ,, , I :„F„:„1,,,,,:E.,, :, ._.„ ,, z� .e _L 4 u0 ; . H oA s. I _/ e L• pEejIdtA F. iII gilt!"� q i $ !@8g III �i a:. 'gI till aa. l° `s 1111111111 ! � "g8 '-z a Fg a �.�€ r 4e ilgl! P of E lii t r si }E°g giii qr 0 ggk Silgi g11`{€ x 1; Irqi xI[bir 1JIii, ' ia4 , �1 aii gi # ggl }a a sA q: a, i�o s ; r €i it $ g T is1 ' 0Ili 4 rH14 kvi e x �`iii d �� ! g _Sa , �1ggi-Eli _ i $� gg �gg p' p 1 ajiya $ III! 4 ri xr i t r g I1 d 6�i Sag g$ E ih S � ° CITY OF LONGWOOD STORMWATER MASTER PLAN I DRAINAGE STRUCTURE INVENTORY UPDATES • git�+ � I ` 11-itiitil."_.1t,k.rtS4-i- i ��tra t ' ir`"6'�§ `>a-a ese'�'�+e y .. ��,�'��— „,:l. 4 -� +eny:AY A v,M a°.,-. %f .T^ ry r s t+�j \ t.. avkaa:',\ 'a ` t Far s a It .cy-'r a �`` 5. aF "' e„FF.' A„ �.�; �^ r : tA� .1 � 'I ' - PP F s .- , - -A 'a�ti`�''i 1` Lt a j,.f y a F,g" ':,' r ^f, `'r'*G 1a q i f . �a ¢i21, ?; a �\y� ^a., _ rr l'. r��r ��- ' . ram.,3 }� y 71 3 3 Y �"� )3 .`s`�e1 \4 �vR?'rt ' !E �fl. yi� tt py M �,- -i, - _a $ t c inp ' u^tv r 1. �' € ., ` jc r 41 i $ x3f>""\ a !+ yy,',dr i r1 .'I . d 'r Ci ( �.ic ' ,t44L�T 1C' �' ' }' T ' xYa '"} tZPC rti3 .rwC T'v 2'a gyp- .. `e\RP/''. 'sT fs fie. t r't, x t !"h c ''�' Mom'"- - , , k J tt �`� F .e.t xi ,,,- a s e r v T IP �_ 414 c3 iti �'�R' ,,f.� is :rat.' a4¢-..� r i $'. -ems " :''a - /.t �'`i- h�"r'. z #,.a wn ,u-; v 3' S��s w"'` I a s =t'at . 5 a rA "' - It J "+ ,[fir P 1 - g iqy>a AlAssAr ra 1 I� 'C : `tom'. ' �-'k rx p. "4 a i I �' " er vw f 'se 's 5"`-u''a a'iJ 411E 4 r '-E �..�': Y I S { W v .F RR t990 k - I rT5 ranA 4 +fit T ae' i pr ti I'4 F -rr z1 r` ti ,t -ii o- 7- :I r '� ai a : mF le ' "" � I �" � T,; '- igo-" 3r'y�./ ■ S 7 * e 7171 '§ " "`s`se 'tea. Y�--..4 ;: `i„1i ;_} dln,' #..r , t y d'a i4 , 4,r c ; l 's"r2 y + 1' ,, .,- r s f1 4 . JJ„pis,, 5 4- �y °y ,-- , x_ ' ' per, ^�� lrs ft g. gg cl ,46fri-,,s. r�Lr c.iic,*-'9 riti 7lic5; '.- '- ^ ,�_ 'gam a tL.$! �+kZiA4 viitec '"'4 J"k 5 S-- s e ; _ g� e' � CITY OF LONGWOOD O — a 2 f E$ � �Gi pp�� STORMWATER MASTER PLAN - �$ G p jo ii �' M DRAINAGE STRUCTURE INVENTORY .5i Y$� e4 SECTION 3R�T°WN6HIV 106.PRN6E3TE(WE9n -- - -- - - :�Z ..:. -wrt eem¢'v B , °. IgI5I *, N ' 0. w, a 3 tis '--Y,. 11‘1 r; 1• * mM. { I te ' ac �i a � S , .. 1` F„ i � t t r y -j _v a P isi r ..,+� d 1 'may f, l ,, * If, - Po-. y }P. va " ''a9l �.' `y y5 "','ell < iL 1A-.. 1'r , r K k _ 3t' a ''<' tit� � �." � �`w`-i-.'�r g :` M .. ; ' I--3 r . q, r �� ew >' i �n PSI _ l 'ft•j 1 ' +� e >N ��" s - �' R' 4= fA S—.. r„�{, } l.- t I x ' `airy tt :lY" i z ,- I .P '.a I , '�,y. 5 4£ t [t 1 0 ] x rT .l L+Ft �T .f? ......,:thin ro,f�ii P —LAW-....,- -3 d x "Pier , '.� "` e �d �'E; 1-51 J K {y if �� S � S+ P3�4 ;5 ,.. ;:i`- e l a y 1i e I P A 1 1 ti N � 4 qNy t ) i x" aq �$ P.. d �iiej' �5 fll�A • Yh•(:" , L fl f 4 Lys"[ .-?, f 4 4' F y '2 . :17 ' g.„_3 �'r' izy �, I , 1 •R " V.-=F , e-T TS A$ `cf...;„ k'`. _ 1 irt..r +, .H 5E.nL'` `� 4 '. . 'T :g, � '� : il 31 hk .A HTr f v .fr 'i IT F yt 11 '� ,.�..l '- '� crhsp. f.i - la Ur.3 �.',ka AkJ ' x. II .r^ yr: ': f4.4 , * �{j"tl w� t '. I- '� { °,-r a"S$x a'1 g k m ash k. 3` ! - .yam - 4 x• _y4T r ' c s `s'. 1 �. � E � y � ' iii� A. f ¢ ... , fi ` t"f:P • a-:�.t x y x;" A3 {.c �J�' ate ! - I fi 4itYa t ...rt. 1 w n s g • I ��'� � _ gL- t a to 1G '' J s - fik 4N T - !1 , ( 4 lF _ c � µ - k.0 .'5.4 �.n _- .ew� t. r ! tr1J • h'r a ".i' �9 + i I' ',-r,9tP 'g „"•- - g -- a si �: ,'_2iii 4. %�r a x °z .- *I Sys -u, I. ,• -asp %`.� Y e,�, ¢p¢p s MVa CITY OF LONGWO ST -_---_ 1]� § y "jg 3$ ,� •I�p' STORM WATER MASTER PLAN _ — ono S*Y f€ Bfi $S ` DRAINAGE STRUCTURE INVENTORY _--- - a t di y'Q'( SECTION BR.TOWN9HIP 209,RANGE 80E 180UTHWE8T1 --- aE'1 • tgri i' 1 � .r4 �..�" 1{ +F c{ f�. � � ilk" ,E" y Ka r o f i . k 3� { F" -C '� t 1 rV. bP F YI r -c ,..u , I :? 4 s N ' h ¢ ,'T vma2 n 4..1 o-, Y +1 �' « °I^+'? • r y'"tr q v .r^,tbT4bs �.�L. s""`/', F"�• '� f Walk 4 rb'.' f L.;bM 9 4::::::f2A, v .: € T 1. !' ;-Tl"w r J a b I f _ '3 �a�`.] kit 1' 5 � T�`�'r "11�,...,..„*.:: '1 Q `mow s+t..+l b' iM� d s y^A s n�rrk� Li � l —Or 1: twT c - i �. 1 Sy a# �.v 'II 1T•F 6( r y.' £ '-� G. b/,�( tR `tl 3R+t�y; '" P 1 r: kil � S i'N "5y c � +-2 }.;yr I 't J't+E�' r . -::„ y�3 ' 't k,P Ty�D -Y �3; '4'J T 0..' 'i# `Ym- `i 1by { @ , Li fi„i` Siff i k f+ -r� SSi; ('UY�1` M" ram.: L�i 'le' 1 1 i6 '. f' " it., i' w �,e ."+ f C _ sf, "�'¢ i P" 1• 1 ' � �>iwx�,. p � sT-+.. r " � any a ! �. .,4 _ E y ' s -,. .y, s rf x _; '�":3 [Y -T'tA t"' ) At, "4' , ZJ' .- -r!y ,` -'s l "'y 3 . 54 ) bbl .yam ',C'Fcx i j. i ". Fb .'. 13 1 w x " �' � � x ft ��' 1 ,. I I� r �bg:; 1. .w a t { a iv: 4. ry�a�s s a.. v Y itET s ,: I1 4m ,f i t L E ' L RI �'°, r ssa ss ,. .>, 3>:,+4 .-� � '� ` - ' r ,*+. L 73t M^`ti 1 a1 �F r�@+� S -ems z\ s'Zrk0 `L " •;i21"2 wk.' b ,r Pc.r rIF t x �4'- r ,' y0R1� .-{- § +. 4i ^� .4 '�. ,+ -t'7- .f, r� 4Y YY Y' 9`hc zi kn5sr'y1 _. . - =y 1 J"'i �h �C� s Y NY 1L :• V2�,`z.-i. TS PP bb'' R L 1 iS K' `f` - t , W gSR tac ,,x: .4c'' 3 r t q ^2- n`h` t $ 1n - R /. Ii -^ l . ,, M 13 'iban Vj`„ �' x 3b' Iyf i- ry 1'141:1, JJ t T 'Sfi.. 4 1 _ -44 !<T xymtin°a uYi Y. ".4 q '� 4' h any n tli c .af W®®G Y a I • f HIxk� 1 a 0, _ �pS F k44' CITYOFLONGW000 — - - -- kLi +�l I STORMWATER MASTER PLAN �� m i[ 4 ? _ S„ DRAINAGE STRUCTURE INVENTORY - - -_ - CC — gr �3y „ 6ECTIDN33�TOWN6XIV 266�RRNGE30E IEP6T1 ! - ---- --- - - Qv I •mt--ter.— WI sr koi -'°_ ' �.. 5 ^^��„mow ,�>z`tt��,,'�^- 7. 1 9 ' � - a, } I4'F4 d 4•q' " i 3 t ?k 54 4t,x '.�- 'i I ,,. s ..mo t ID 1 may. b ;tip,-i, r t l� i s �' �( t A _+� �� $ L, 46, ��i �� B Y fi. kx ,�(�� >o :Y 1 } I k `` v C i n "1`TR { £. 1. _ i .f ;'t 1` sf :a, �3„. Fr 1 Y' -, --� x.� 7- --. A+ . f•, .. .--.. '... > 9 .. ' «fly' az..' m `t;: art " !�"" rA,s ' 1 ,r ,4,' 1 toy} I ^' r€ ..rl �i 1 - f x`z � r '' ` ; . 4! r. - ate t 7 , .-� 1 = f 3 f ' .. i)�l.'t-„ ,,a ,� e i I -'' w .,a "� 4t .t as >: - -' �_`� - 4 I. i . a l �" --,c' L 'i -rt w aET s'r ° 5` - #// . _ ',.,�3 1 I'. t a' it rs ¢Y > Y 11 Ems i r *c 1 'i� jl s " a4 4 : 1" 'S YSi e`� 1 �s• : +-i p-�e �:s��'., � ps .� f„�c s 4 a �'Z � �1 '"a � ��€+'kn � .- ' �_ � 7� ,r:'; a d Yw yet, __ ', T '+r F (p wi S ' i �� T j , � `y4 ' I 'cq..4f "sea 'I r 4 s:c „� L,;e, 11 e a1 l .z t • �7-:-,1 a. • to : ' 2I.~ J1�4_,r.` U nn� s- }f . �++ Ed of &' + }, aq...,L a i 7 t ................ rei - a --Pali y t:a I+ ✓� +>r _ � ,+WV , w �x pk i_L •+P`>�B e 1� —v i �-teN � �1L w.g'w. .�:_ . . . ii ' t ° �" P I L I &. to r ,(� - \ y, f 'I F --T f If 111 u�_E1L1 e F Amy }S 9 , - r Yf .y, -,- l 1 ,1:„: .� tea'(] !€ $'.E, V`LL m3' 'L �f .m,S €..,c s F v P S� �•F Aii w:-.V441-4,-, i • s S s: "qsz 7: (e IR .wmut -.`-t � 'v {s tJ,3c r' e J , k t`iw ki t ea�A 8� 'J *�'_, "P s 1 I F f•^ed c-��-a '°� e x �'� Y I a o ���1�� � 5 k � by � �-.F' ' _ „ 'e'�t Y L r`"�� ��R`b � . _ - 1a X1e: Nt i r d ! C ,- ;' fi 4F eke CITY OF LONGWOOD g2 iiSSP Be �pp STORMWATERMASTERPLAN r :t FAA' e41 DR AINAGESTRUCTUREINVENTORY B^ m � }� SECTION 82�TOWN8XIP208.RAN GE80E(SOVTNEABT) aumx __ _ 4.1 r-; w ''�F # • +x': .� e P, t a , +s ue a4a t2 -i'>;,. +fit-N ,,z,..4... .a. '�3'' �Y y 1 :E 3 I. ca°:,. R R . . 'z 4.4 x i L --- v 5 t _ s Y'L?♦Nrt'.' d t,-i `` € ,. i o- ``` '-- - 3 aP 6 r 4xsu.,y, �l g SSc 4_ -_ ,*4 c 1 r.7 w' -~�s%> Tl` 'y'e r. t Yy^....;YY�_ x.�L° f 1 ..t ..'' 'i� � l.� n'D� � �~I� �. i.Ef K-,. st_ ,r,` ro $ F MLA R .F D t;4 `r"3 z \ { � i.she.s� Jr�' '11 9 FhK i ,� U1 F. . ' x �. � ,aa . tt t�s � �� e --r . s c..zr ,,,t �a a� 'r�,-;-. I YS ;a i sr = �* '�`w ! $ 'a .� _ ,� s 4 .o 1.�i �.l}.f ( -IT j1411rIitk 'fi P Ny-- ge E� dctrt v 1 aea a FCC ry - `�. _ M Av ice„��{—J+-':aH'Y: y+�l� y,-<5d' �p ,74 t E+ I • Y 4 "lx ,04,11 A y rpEny , X`t'y j' 4 u� -.` ._r rc 1 4-;% is s z ° ° i iS ? -. :,,,,I.,,I � ! 4 � 4� ' x t C !K, C �l'T�M, i Ott- SF; I-"vh' 4' Q J�-. 'Y ems. '7- '�' p, a1 4 �.� G !L =f sr i 14 ! Y, .. Y - L ^'; v -;ate k.ts� � {`i t s "fs '"? t>r .' i+-�_yt o ,,yIS Alic,Pr, �ry 4 vi /3 ! � �� Ye .}?'#� T-3 � T�, � ^A` i }' "'fig YC�' Y � N`_ yw t .. , ,i, 7 ' --',.-_ .--1--- rot: 1., K;-crcl, c,,1 "•-, .-` ^ . .„`� + t ° s h ,� + .=Sb1 a r� +"7", Tyr ,F " ;-,;,, ,,,•,-,„ $, .,,,,. „ toe L n�'` K .ems"'y s �stz g( rY P an &? ....k'+ �sz ' x U. a, e s. .ai .-v n wgs` 124. 01 �, It.eir 5f + m RRNA m+ x t -ill 9T 1 k@I .44 �` 224. 9 I, -' ' xP�; .: ltS. - n4 d� �dnh'°' I {,per T aI Hkr �'x p .`�''It',p s#v Alt;E � •n\ ti.�y�za g@ o� , a� §a - fS STYOFLONGWOOD a @ STORMWATER MASTER PLAN - @ a °p #" s 5 a ! `;M DRAINAGE STRUCTURE INVENTORY a —e N �( ',fin a SECTION 3R,TOWNSHIP2oR,RANCE9EE(NORTHFA9T) :----- 4, City of Longwood East Longwood Area Septic Tank Abatement Program Phase 2 Thru Phase 6 LONGWOo1Z APPENDIX C EAST LONGWOOD PHASE 2 SEPTIC TANK ABATEMENT DRAFT PRELIMINARY DESIGN REPORT