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07-10-97 WSNol),Vo Jo XIIO LJ \o 2 2o� 10 It Ilk All VO) to -3-1 ',MI Mirlo -3'N •g-a;?v '3AV 30dN 4� �L i� I I "- LA Tl -3-N -3AY SN33nC ............ I t.1 C \77o - ZONE NE X M ZONE X A Q� ZONE X ZONE 862 0 A M ZONE w City of Dayton AREA NOT INCLUDE( TO UN q,fY Needed Fire Flow for One -and -Two Family Dwellings Distance Between Buildings (feet) Needed Fire Flow (gpm) Over 100 500 31-100 750 11-30 1,000 Less than 11 1,500 Per Table 3, the required residential fire flow is 1,000 gpm. Local fire department authorities were contacted to determine existing fire fighting equipment capacities. Current system capabilities include three pumper trucks and one aerial sprayer. Two of the pumper trucks are capable of 1,250 gpm and one is capable of 1,500 gpm. Bruce West, Fire Chief, indicated that 2,500 gpm for residential areas are adequate flows to use for system sizing. Bruce West is the Fire Chief for the Elk River Fire Department, which provides service to the study area. Commercial/industrial fire flow demand is determined by a complex formula based upon building size and configuration, construction material and type, and length of passageways within a building. Each building must be analyzed individually to determine the required fire flow demand. For the purpose of this study, the ISO was contacted to determine historical fire flow requirements for this area. Per the ISO, existing fire flow requirements for industrial and commercial structures in the County range from 1,250 gpm to 3,500 gpm. We will utilize 2,500 gpm for Potable Water Systema Study uirement for our analysis, and Page 9 SYSTEM DESIGN `'Vater Wells Water wells will be used for supplying potable water to the system. The total capacity of the wells must equal or exceed the maximum day demand of 3,003 gpm. Well #1 is expected to produce 500 to 600 gpm. This means additional wells must be added to provide 2,400 to 2,500 gpm to the system. We are estimating that 500 gpm io 1000 gpm can be obtained from new wells. This is considered conservative for this area. The actual well production will depend upon the aquifer into which the wells are drilled and can only be determined after test wells are drilled. At a minimum, three additional wells will be required, and depending on the yield from each well, a fifth well may be required. For this study, we will assume an additional three wells will be constructed. _ Storage Requirements The most common method for evaluating system storage requirements utilizes the design criteria that _ during maximum usage periods, 90% of.the demand occurs during the peak 16 hours of usage. Storage must be adequate to augment well production during this 16 hour period. Storage required to augment the wells during the peak day demand is summarized below: Table 4 Storage Required As a "rule of thumb", the Minnesota department of Health recommends providing storage equal to the Average Day Demand. For the study area, this would equate to 1.730 million gallons. Based on this requirement, we will utilize a total required storage of 1,750,000 gallons for the study area. Page 10 Potable Water System Study 1 SYSTEM GROWTH A water system will grow in segments to meet the needs of developments. While we can approximate long term growth patterns, short term growth is difficult to approximate. For example, we can predict, and the City can control the general area, where development is to occur within the City. The 20 year study area has been designated as the boundary within which new development will occur within the City. However, predicting the pattern that developments within the study area r" will come on-line is difficult. The water system depicted on Exhibit C was sized based upon the projected needs within the overall study area. The initial growth will occur within the twenty year service area, but must be sized to allow for the long range (study area) needs. Phase I Service Area ��E IM 2917 M., FJ t Design demand for the twenty year planning period is based on growth projections for the City. Per the City Planner's Projections, the following data was obtained: • Projected twenty year increase in population = 1,750 • Projected twenty year commercial acreage demand = 70 acres • Projected twenty year industrial acreage demand = 73 acres Based on a household density of 2.5 persons, a residential use of 300 gallons per capita per day (GPCD), and a commercial/industrial use of 1,200 gallons per acre per day, future demand projections can be made. By adding the existing commercial and institutional estimated demand, a total projected usage can be obtained. Our projected twenty year.demand is listed below: City of Otsego Water System p,-..;"tpA Twenty Year Demand Zoned Land Pro'ected J + Pro ected :' j Estimated - :Ezisting y Projected Total Projected '. Use Acres :' Residents> : Demand `Demand Demand-... Existing 19,500 -- 19,500 Commercial Existing 4,500 -- 4,500 Institutional Projected 1,750 -- 210,000 210,000 Residential projected Commercial/ 143 -- -- 171,600 171,600 Industrial 20 YEAR PROJECTED AVERAGE DAILY DEMAND (GALLONS PER DAY) 405,600 APotable Water System Study rage I r Utilizing peaking factors of 2.5 and 5.0, the following table was generated: City of,Otsego Projected Twenty Year Design Demand r- ItemProJecfed:Flow'(MGD) .: Average Daily Flow 0.405 Maximum Day Demand 1.01 3 Peak Hour Flow 2.025 -!M Supply must equal or exceed the maximum day demand with the largest producing well out of service. The projected maximum day demand is 1.013 million gallons per day (MGD) or 703 gallons per minute (gpm). Three wells will be adequate to meet the twenty year service area demand with the largest producing well out of service. Potable water System Study Page 13 Phasing The twenty year water system will grow as dictated by development pressure. We can estimate what portions of the system will develop initially and determine a logical pattern of growth for the remainder of the system. We anticipate that a �4�n non vallnns Water triwPr, gu." thr� the first fiuP VP�rc_r,fthP -Z�?Prn"z irrn��*h Additional growth will occur during years six throuAM gh fifteen, mainly in the form of trunk watermains. Near the end of the twenty year period, an additional water tower will be installed to augment fire protection. Residential Equivalent Connections (REC) Growth in population, as well as commercial, industrial, and institutional, is described in the form of Residential Equivalent Connections (REC). A REC is equivalent to the average daily usage of a typical household (300 gpd). We have estimated that commercial and industrial usage will be equal to four REC's per acre. Based on the City Planner's Projections, a growth in population of 1,750 persons and a commercial/industrial usage of 143 acres will be present in the twenty year study area Combined with existing commercial and institutional usage, this yields a total of 1,352 RFC's within twenty years, for an average of 68 RFC's per year for twenty years. Based on this system's_ phasing scenario, the following table was generated: Phasing of Twenty Year Costs Year Construction'..-- "-Cost (1997 dollars) 1998 250,000 gallons storage tower • One well $2,315,000.00 • Two pumphouses • Portion of distribution system 2003 One well • One pumphouse $1,374,000.00 • Portion of distribution system 2008 Portion of distribution system $574,000.00 2013 Portion of distribution system $486,000.00 2018 500,000 gallon storage tower $1,621,400.00 • Portion of distribution system TWENTY YEAR SYSTEM TOTAL $6,320,400.00 4 Potable Water System Study Page 15 SYSTEM FINANCING A water system is funded by charging consumers a fee for connecting to the system. This fee is used to pay for source facilities (wells and pumphouses), storage towers, and trunk watermains. Lateral watermains are paid for by consumers receiving direct benefit from the service laterals. This analysis provides a recommended amount for the connection fee. The lateral assessment cost will be made in the future on a case by case basis as the system grows. Based upon a pattern of growth as described previously, capital costs were distributed over the twenty year period. An average connection rate of 68 RFC's per year was utilized for the twenty year period and extrapolated beyond twenty years. A financing spreadsheet was prepared to determine the connection fee required to finance the system (see Appendix B). The spreadsheet depicts data beyond twenty years to ensure a positive cumulative system balance is maintained. Based on this analysis, $3,875 per REC will be required to fund the water system. .EHEEE.� Potable Water System Study Page 16 -- . 7 - est Distridt Area _ExistingDesign Resid_Comm/Ind ResidlComm/lrid-- -------------- ___ Units _Inst. Units Inst East -1 - 99 18----____-1463-�----558--- �--- _-----East-2-------------------------10------.---------4-------------695_---------. 141 �' East -3 _ SubTotal 109 22 2158 699 _ -South District Existing Design, -Area _______ Resid_.Comm/Ind _ Resid._ Comm/Ind Units Inst. Units Inst. -South-1 - 66 60 _ ._ _66 - 255 .- ---- - --- - SubTotal 66 60 66 255 - - i 1321 =====138 ====4163 ====1605 Total Total pee- G711j4 n Existing 1459 Design 5768 Units Units '�w �. qq � 9 / , .yo 0 loo P SUMMARY OF RESIDENTIAL EQUIVALENT CONNECTIONS CITY OF OTSEGO, SANITARY SEWER STUDY AREA - WestDistrict Existing Design Area Resid. Comm/lnd -Resid—Comm/Jnd Units Inst. Units Inst. West.11 74 West -2 112 163 _ -W—est-3 21 1 West -4 74 74 West -5 156 27 _ W est 6 19.8 263 SubTotal 743 1159-- North-Distri Existing Design 'f Area -Resid. Oommlfrid- Resid.—Comm/in �I Units Inst Units Inst. North -1 -17 131 2 _ Nortli2 2,16 35 438 270 North -3 32 80 ---North-4 --- -24- _21_ 4.5 -381 -SubTotal - 403-- --56 — 780- 651_ est Distridt Area _ExistingDesign Resid_Comm/Ind ResidlComm/lrid-- -------------- ___ Units _Inst. Units Inst East -1 - 99 18----____-1463-�----558--- �--- _-----East-2-------------------------10------.---------4-------------695_---------. 141 �' East -3 _ SubTotal 109 22 2158 699 _ -South District Existing Design, -Area _______ Resid_.Comm/Ind _ Resid._ Comm/Ind Units Inst. Units Inst. -South-1 - 66 60 _ ._ _66 - 255 .- ---- - --- - SubTotal 66 60 66 255 - - i 1321 =====138 ====4163 ====1605 Total Total pee- G711j4 n Existing 1459 Design 5768 Units Units '�w �. qq � 9 / , .yo 0 loo P city or u1sego Sanitar wer Collection System Study RESIDENTIAL EQUIVALENT CONNECTION$ (REC) BASIS OF REC IDETE'RMNATION. Low Density Rt sidential Riverside (Park, 2'5 lotsp er'developa6le acre Medium to High Density Residential 411 4; REQ s pej devOopable ac'n Commercial 5 existing'parcels 4! R EC!s ped dev6lopable acre 1 Undeveloped - two structures exist i 5 1. 4 REVs per developable act n Institutional f i 4 R EC's per acre CRITERIA FOR LOT SPLITTING, �41 75 feet of streeffrontage 4 Undevelo ed -Minimum 12,500 SF lot Wokson Hills 18--- Suffic ent lot depth REC REC AREA Undeveloped 1. Medium'. W. High [Density Residential 1 i AREA DESCRIPTION ,r)mMF:NT.q 196E r I -64 Riverside (Park, large lets 06 the SE ends into 75' street front lots 1 411 I 1A C_%� JTWQ 27 I 33 T 5 existing'parcels No lQt s'ptiN109 1 1 1 1 I 1 Undeveloped - two structures exist i 5 1. 5 3 (Und velo*ed Low 0 V.sity Residential I i I I I �veloped i [Unds'velo�ped 1 �41 0 4 Undevelo ed LQw L)4Rs.jtV! Residential I I I I I Wokson Hills 18--- 0 5 Undeveloped 1. Medium'. W. High [Density Residential 1 i i 196E 3 6 Undeveloped i Commercial; 186 4,2,2 5 7 U ndeveloped IC'mmir part!'of area is in flood T__ 0 dqj', d _pWn 1 I ; 120 I -64 ndoveloped - two structures exist i L07W Der Q I 1 1 _T 1 ---- T I 33 T 2 85 _867Undeveloped 1 Undeveloped - two structures exist i C QmMe! rr'..41 i I I I I I I I 551 2 87 88 �veloped i [Unds'velo�ped 1 7 Low a not including wetland areasi DeRs.i.ty!'ReWonth 1, n Wd; r, 'D not �including �40and T_ lurrp 4.rWty Q61d", areas Industri,"al n..Q.t ind wetland wetWnd 6reas! i 1 149' 7_491 I 1731 1, j 0 48 89 Wokson Hills NQ lofl.iptitti.64q i 31 1 I; 31 90 Undeivelo' ped I Industrial 821 1'- 91 (Autumn Woods j I i No lots lith i I h 35 Com n mu- _i fiz I,r ----- R v n �a1k ,v a, �-. Jam•. � ; ii � t 1 GENERAL NOTE: ALL GRAVITY UNES 8" DIAMETER UNI ESS NOTED 12" FORCEMAIN SIZE AS NOTED 6' 1' F z� 0 2�o SOUTH-_—Jt,f_ ►`,,�i` HSCALE: IN �� DISTRICT cmr OF OTSECO SANITARY SEINER Q COLLECT" SYSTEM STUDY UFT STATXDN SANITARY SEWER COLLECTION s�RSEWER SYSTEM OVERVIEW ��NE 13�� --- - Al/j! [• l: !] Jr �r Project ,. Y L terA Cot a -":Think -'T run "Total Cost:* -. A Kos — Year 1;, Base System .1 0 1395 d Lift Station & Force" ainoo m 1 3P5,000 Year 1; Gravity, System I County Road 39'ared 20,400 1P5,600 417,000 85th Street area 160,60 6�1 3,400 774.OQO 452,000 j 79,000 1,191,0()0 Year 5; North Parish Avenue 28,490 1413,600. 1,422 000 'd 42 to 72nd St Quaday, CountyiRoa 308,000 0 i 308,000 78th Street area,; West of Quadayi 4,060 nn yy 0 650,400 j 529,6001'18;0,�00 Year 10' County oun�ty Road':,42 1 Road 3M 5 26,0yu 2P4,�00 76012100 78th Street, West Residehfial, 1 3 56600 08p400 445,000 Quaidayto County Roaa`157 I 1 i 216,600 308,600 524,6100 ;South bistri6t 24�.QO I 2 2,1100 449,000 1 i 1 1112,12,4,'00 1,3�9,1 90 ' 8P3,3"00 Yea 15i; We Weptqt 84d Street Aria i 17-1,00 O'c 00 s I 211000 il 7.000 ' TH1Q1 lea to 65th Strelti 366,09i 0 62,000 T 428,000 TOT -A 1218 Vv50 1 8, 00 6,�76, 00 ALTER ATE y .. FORCE R19 i W S Ory TO ELK RI R r PI 1 MRR4 .S Nt 89th ! j r.. O u > d%T. \ f -- — 4— — — W � ! y 1 'h cp -- �� _FORC MAIN TO T �- c.y `�1 ;__, � I -,9�\ 1 _ 722nd ST. J ►� l � y - _ H. (N.E. 70th ;T) l l 3' z r Li CRY OE OTSEGO SANITARY SEWER 0 1500 3000 COLLECTION SYSTEM STUDY j SASE SYSTEM SCALE IN FEET Hakanson Anderson Assoc.,lnc. anitarV Sewer Co 27,52( --.---2-j300 5,900 _-100__. 400 1 System Construction Costs L'F 8" Diameter Gravity'Pipe - (all depths) $487,093.60 LF City of Otsego 8" Diameter Forcemain $88,500.00 Sanita Sewer Collection System Study $179;32(D-.OQ 4 S.anita SeweLOolle.ction_SystelrtCosts-and-REC-Analysis 1 -- _ $149,663.10 EA Lift Station Subdistrict North - 2 Construction Contingency (10%) $120,634.27 — Estimated Estimated 5Rrsting Future _ I I Residential REC's 216 REC's 438 — Comrnercial./_lndustria( 35 270 Institutional Total 25 70 anitarV Sewer Co 27,52( --.---2-j300 5,900 _-100__. 400 1 System Construction Costs L'F 8" Diameter Gravity'Pipe - (all depths) $487,093.60 LF -1 9"- Diameter- Gravity-Pipe---(all-depths}-----$-406,766.00— " LF 8" Diameter Forcemain $88,500.00 EA--Manholes =--(alydepths)-------_ $179;32(D-.OQ LF Pipe Jacking $80,000.00 LS --Dewatering -- _ $149,663.10 EA Lift Station — Construction Contingency (10%) $120,634.27 North - 2 Subdistrict Construction Cost $1,326,976.97 NOTE:.; ----TOTAL DOES NOT -INCLUDE--- -- —-------._____----____-- --._-- RESTORATION COSTS OR INDIRECT COSTS n - East District The East District consists primarily of undeveloped residential and commercial/ industrial lands approximately south of 85th Street and west of CSAH42. The District includes land along the Highway 101 corridor. from the intersection of Highway 101 and CSAH42 south to approximately 65th Street. The East District is depicted on Exhibit E of this appendix. East -1 Subdistrict The East -1 Subdistrict consists primarily of undeveloped residential and commercial/industrial lands bounded to the east by Highway 101, to the north by 85th Street, to the west by the west section line of Sections 22 and 27, T121N, R23W, and to the south by Section 27, T121N, R23W. The East 1 Subdistrict is depicted on Exhibit E-1. This area will be served by a gravity pipe collection system with pipe sizes varying from 8" to 19" in diameter. The undeveloped residential area south of 85th Street willTe served by gravity sewer pipe ranging from 8" to 15" in diameter. Three 8" gravity lines will be jacked across CSAH42 to serve,the industrial/commercial lands east of CSAR -142. The gravity collecti"nsystem flows to Lift Sta*ion E-1 located at the intersection of CSAH42 and Quaday Avenue. Lift Station E-1 is designed to be.the major lift station for the entire study area collection system. All wastewater within the study area with the exception of the flow generated within the South -1 Subdistrict, will be pumped from Lift Station E-1 through a 12" forcemain to the treatment facility. Flow from the North, West, and East Districts accumulates at Lift Station E-1. The increased flow results in increased pipe size and depths within the East -1 Subdistrict. East -1 Subdistrict RFC's Commercial/ Residential Industrial Institutional Total Estimated Existing REC's 99 7 11 117 Estimated Future RBC's 1,463 547 11 2,021 East -2 Subdistrict The East -2 Subdistrict consists of undeveloped residential and commercial lands along the Highway 101 corridor from the half section line of Section 26, T121N, R23W to the south quarter section line of Section 35, T121N, R23W. The East -2 Subdistrict is depicted on Exhibit E-2. This area is served by an 8" to 10" gravity pipe collection system. The gravity system flows to the north into the East -1 Subdistrict gravity collection system. An 8" diameter gravity line will be jacked across Highway 101 between 70th Street and 72nd Street. The 12" diameter forcemain that Sarutary Sewer Collection System Study Page 7 1>d'f 19 N 3411 S Population *extrapolated based upon 2000-2010 growth rate Projected Industrial Growth hi 1995-2000 26.4 acres 5.28 ac/yr 2000 - 2010 .47.0 acres 4.70 ac/yr 1995 6,116 6,116 2000 6,305 6,530 2010 7,450 7,898 2015* 8,023 8,582 *extrapolated based upon 2000-2010 growth rate Projected Industrial Growth Projected Commercial Growth Year; :,Growth 1995-2000 26.4 acres 5.28 ac/yr 2000 - 2010 .47.0 acres 4.70 ac/yr Commercial 73.0 acres 4.86 ac/yr (average) Projected Commercial Growth Year; :,Growth 1995-2000 23.5 acres 4.7 ac/yr 2000-2010 46.0 acres 4.6 ac/yr Commercial 69.0 acres 4.6 ac/yr 20 YA rdWdot OOV/?~**AOS oveo 216 7 - 110 todiodd/yx Awe 9.y6 fiG/ yoo - - - Commercial Increased Increased Commercial /IndustrialTotal new* Year P:g"On Residential )Industrial REIC 1, REC's .1 Units . 0000% I Equivalent. (cumulative) Zero 0 0 16 acre 64 units 79* 5 438 175 52 acre 208 units 398 10 875 350 88 acre 352 units 717 15 1,313 525 123 acre 492 units 1,032 20 1,750 700 159 acre 636 units 1,351 .. Average RFC's per year, 68 units/year Nva vd * d* 7 ' f%.' Nyi 7 9c, / YR- PHASE I COLLECTION .SYSTEM Areas Served by System The Phase 1 Sanitary Sewer Service Area consists of the following general areas: North, near County Road 39 194 R EC's medium density residential 61 REC's existing c.)mmercial and institutional 582 REC's future commercial aad industrial usage 24 REC's existing trailer park 861 REC's East Residential/Industrial zzea, near ' 5th Avenue and County Road 42 290 RFC's medium and low density housing 300 RFC's industrial development ' 1 REC's elementary school 601 REC's Southeast residential area, west of TH101 and County Road 42 985 REC's low density residential South TH101 Area 418 REC's commercial 1065 RFC's low to medium density residential 1483 REC's The maximum number of design REC's in Phase 1 service area is 3,930. The planning data from om projections of growth in the City over the twenty year study the City Comprehensive Plan and fr period project service to 1,351 REC's within this area or slightly more than 1/3 of the development potential in the area. DESIGN CRITERIA ............................................ Estimated Future Residential Equivalent Connection's Undeveloped Lands 2..T 4#rt /Re Residential Areas rf • o Mvirxl Rc s ,ovE o � /16F.4 Commercial/Industrial Areas 1 o o c yot,10#4p 1 Developed Lands Residential Areas cao" r Commercial/Industrial Areas /OirO �A�/ pAY 1AC* Flows iodAk �rorroot Pipe Depth - -ro is ' cFk rr r.*,vy Manholes Lift Stations ,Coc,,er to w OCOA. Avco i -44e �y�re�•� ACRES' "PLAY 6 3 ELW hj 9�=. 96\ 94th ST., ME • i :• ��_.: � � � '' "•'moi Emmon— We NO. 65 42 D +H J 2 I L WKr N/ r , fr I F t I ui 2! OT606LX: 0 2500 5000 FEET SCALE I N CITY OF OTSEGO LEGEND SANITARY SEWER ---+--YEAR 1 BASE SYSTEM COLLECTION SYSTEM STUDY YEAR 5 EXPANSION H a k a n s o n PHASED SYSTEM YEAR 10 EXPANSION Anderson 15 EXPANSION EXPANSION 44 FORCEMAIN Assoc.,Inc.1 OT606LX: Ile- 4-;p 4;:p ie AeC17Z 4, i7i 4,f Y, z 8,0 z /7,9 '00'ec Z-0 VxZi 6 ;7,71 Ile- 4-;p 4;:p ie AeC17Z 4, i7i