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Tab 34. Water Distribution System Analysis - StarlingWATER DISTRIBUTION SYSTEM ANALYSIS STARLING KALISPELL, MONTANA Prepared By: MORRISON OF MAIERLE, INC. An Emplolvee-Owned Company M M I #: 3384.039 STARLING WATER DISTRIBUTION SYSTEM ANALYSIS 1.4 Introduction The purpose of this report is to analyze the City of Kalispell's water distribution system and its ability to meet future domestic and fire flow demands in the proposed Starling development. The Aspen Group, doing business as Stillwater Meadows, LLC is proposing to develop approximately 640 acres in Section 35. Specifically, the project is bounded by West Reserve Drive to the north, Four Mile Road to the south, Spring Creek Road to the west, and Stillwater Road to the east. A vicinity map is shown in Figure VM-1 and a water main layout is shown in Figure 1-1. The overall development plan will consist of up to approximately 3,000 dwelling units constructed in a minimum of 14 phases. The land uses offered will vary from single family homes, multi -family paired homes, condominiums, townhomes, mixed use commercial including professional office and a parcel identified for a new elementary or junior high school. The number and types of housing units constructed will be determined by market conditions at the time each phase develops. 2.0 Existing Conditions Water for domestic use and fire protection will be provided by an extension of the City of Kalispell's water distribution system. Starling will connect to an existing 14-inch main that is located at the corner of Stillwater Road and W. Reserve Drive. There is also a proposed development south of Starling in Section 2 called Fox Trotter. The Developer of Fox Trotter are proposing to extend the City of Kalispell's water main to serve their project. As Starling develops into future phases, they will have the option to eventually connect to that proposed 14-inch main. 11 STARLING WATER DISTRIBUTION SYSTEM ANALYSIS 3.0 Estimated Domestic and Fire Flow Demands For planning purposes, water demands from the proposed development were based on the following assumptions: • Residential Demand = 145 gpd/capita • Maximum Day to Average Day Peaking Factor = 2.7 • Peak Hourly to Average Day Peaking Factor = 4.0 • Population density = 2.41 residents per unit These figures are taken from the Kalispell Water, Sewer and Storm Drainage Facility Plan, 2000. Starling will have up to 3000 units and that is the value used for the water demand calculations: • 350 gpd/unit • Average Daily Flow = 730 gpm • Maximum Daily Flow = 2,000 gpm • Peak Hourly Flow = 2,900 gpm Fire flows for the subdivision are estimated with the City of Kalispell Water, Sewer, and Storm Drainage Facility Plan. Table 3-9 of the Facility Plan estimates residential corridors at 1,000-gpm. The mixed use and school site will require fire flows up to 3,000 gpm. Fire sprinkling may be necessary at these sites to accommodate the available fire flow. This flow is also required by the International Fire Code Appendix B. 4.0 Preliminary Water System Model Once the proposed water system demands were established, the demands were imported into the City of Kalispell Water Model provided by the City. This model will be the basis for determining the adequacy of the existing system to serve Starling as well as any water system improvements that may be required. See Figure 1-4 and Figure 1-5 for proposed water main pipe sizes. 2 STARLING WATER DISTRIBUTION SYSTEM ANALYSIS t Eight different scenarios were modeled. All scenarios assumed the new upper zone reservoir had been constructed. This reservoir has a proposed construction date of summer 2007. The water modeling scenarios reviewed the impact of connecting and not connecting to the proposed 14-inch water main that is being extended north along Stillwater Road as part of the Fox Trotter Development. The various modeling scenarios include: • Average Daily Demand (without connection to the Fox Trotter extension) • Maximum Daily Demand (without connection to the Fox Trotter extension) • Peak Hourly Demand (without connection to the Fox Trotter extension) • Maximum Daily Demand and Fire Flows (without connection to the Fox Trotter extension) • Average Daily Demand (with connection to the Fox Trotter extension) • Maximum Daily Demand (with connection to the Fox Trotter extension) • Peak Hourly Demand (with connection to the Fox Trotter extension) • Maximum Daily Demand and Fire Flows (with connection to the Fox Trotter extension) The maximum daily fire flows without connection to the Fox Trotter extension ranged from 1,350 gpm to 1,700 gpm. The maximum daily fire flows assuming a connection to the Fox Trotter extension ranged from 1,600 gpm to 2,300 gpm. The minimum pressure allowed for pipe main sizing is 35-psi during normal uses and no less then 20-psi residual pressure during fire hydrant full flow condition at any supply node. See Figure 1-2 and Figure 1-3 for a layout of the model that was run. 5.0 Modeling Results All of these main sizes will supply the maximum daily fire flow while maintaining a minimum residual pressure of 20-psi at all points in the system. The model results can be found in the appendix of this report. Q STARLING WATER DISTRIBUTION SYSTEM ANALYSIS - 7 L V. _ I PHASE 9 PHASE 8 "PHASE 2�~' Y I t AS, 1 \ RASE 3 PHASE 19 - I Ft &AI `PHASE 4 P7, HASE • f ASE - i `i r PHASE 11 P SE 5 JV LEGEND: PROPOSED PHASE BOUNDARY rr - PROPOSED WATER MAIN N 300 150 0 300 600 SCALE IN INCHES 13 14 P ASE 12 III `�_-,�,.�r� ��\•\ - \.. I 1 VERIFY SCALE REVISIONS i SEPR"v MYEE NO, DESCRIPTION DATE BY DRAWN BY_ APF PROJECTNUMBER 333e.030 REct,cE❑LMSEL�CNFNHC MoR�tsaN t22BWhd..IiT geRoad CHKD.BY: GLl STARLING ueA IGM DU'UN ory ,j M 1� Kd:sP�. slT scoot APPR- BY: GLL KALISPELL MONTANA SHEET t-UA16ER OR1c tuL oanrf rrc SU�ntlYs DRAWING NUTABFit ��{1�F DATE: 0 ME007 1> M Ll J.J INC. Ptennefs PFo (408) 3916 tacaFr acwLs ncccRar;�r• - 7 F face»sanol QA. REVIEw WATER MODELING AnFmpRnyco-OwncdCom!>s 9 BY: Fig. 1-1 U.133&1103951aAinpMxJonaV�CAD',Cir111Wdx Diepay dNg Plolled 6y dhanson vn lAazch 21, 2007 rrrmnrrteuowemrw�ufRL Me. ant DATE- N 200 100 0 200 400 SCALE IN INCHES VERIFY SOALE! TNEBE Ewtrts Nwr gE REDUCED. LINE BELOW MEASURES DR INCH DR NO. [zEV1510h15 DESCRIPTION DATE BY;•D� DRAWN BY: APF 1228 WhI1e0ah stile Rugd OHK'U. BY: GLL �"0are Kelupan, MT 599Q1omawauwaa LA son you Gtt JMORRISON BY: iAt Ti TK�T1 7}{��T ScknNeb DATE: DJJ2007 L IERL E IN planners Phare:(406)752-2215 i Fax:(408)752-2391 O.A. REVIEW A. L•7nptoyrnO+vnad Campany BY: cm CDATE:. STARLING tCALkSPELL MONTANAAFPR PROJECT NUMBER SHEET NUMBER MOaFr gCAIEAccoaaNCLYS WATER MODEL -SOUTH DRAWING NUMBER Fig.. 1-2 U:133841039 Sterling Meadows%lCAOiCIARWATER MODELING 03.21-07.dv Platted by dhansan on March 21,=7 VERIFY SCALE! THESE PRINTS LIAY BE REDl1CfiD. LLYE BELOW MEASURES ONE NCH CN MGMAL DRAWN O NO. REVISIONS D 1VN BY: AYr tzzewndaranslateRoad cHK" El': A L J� /r� f'�7'''y��' IU11 1{f FE/ SON EIS Kalispell, MT 5MI 1**11.71'►}�{41 77MM�� 1171IyU7*ry1ry S—Y— APPR. BY: GLL '"- � 3e! 11 \ W � Sdan ers DATE 03/2D07 Plerttten; Phone: {A08)7a2.221Ei q,A REVIEFN �. ,ytey o�rn�dC—was Fax:{aoa)75azast BY OOEmDMOlkllaa�l'.HtMERIE. EA:.hVI OA7E.- STARUNG KALIS PELL MONTANA PROJECTNUMBER a3a-tUM DESCRIPTION DATE BY i SHEET NUMBER kt=vZeIBACCCR[xNCtY` WATER MODEL NORTH 6RA`IYING NUMBER Fig. 1�, U'.L?3841030 SIadlrvj MoadowsIACADICIviRWATER MODELING OL+2i-07.tMg Pbllal by dhanson on March 21, 2007 ^ SS y PROPOSED PHASE LINE ll S'�.�.�-ems.—c.-r �i_) . ./ ,11•' +f �.. --5`+., -,_ � rs y'- „_-----.�-•..••--_" ' _..�'"R. If _ �� C ..___._.._._--••r.--------�` PROPOSED WATER MAIN 150 75 0 150 304 i? { i i SCALE INCHES Lail a yk nl VERIFYSCALE' ____ ___ REVISIONS __.___-_. DRAWN BY: APF PROJECTNUMBER THESE PLANTS AUYOE Na DESCRIPTION DATE 6Y REDUCED LTS AYBE 11�1[f [r1k �+y, [/'•�'71�tT1 122SWhReMh Stage Road CHKD. BY OLL STARLING SHEETNUMBER AIEASURESCNE utoi CU j ORRIS O KaliapNl. MT SODof �G,,,u� suray+xa APPR BY: cu KALISPELL MONTANA Al �� LSi� ptenr m Phorla(400)752.22t0 sciewsts OATS 03r2007 DRA'!lniG NUf.IBER 7 P�(400752-230i aA REVIEW WATER MAIN SIZES A�OpFY SCALE AGCOaOaDLT An E1IIpl y--�FDLd COII11—Y BY: Fig. y{ 1 "`�• U:133B44030 Starling MeadomSACAMCmtar PWaDmplay.d" Ploned by dhans n on March 21, 2D07 ccwmnNronawAiSnNUAEr¢E.++D.An DATE; LEGEND: PROPOSED PHASE BOUNDARY 200 lOD 0 200 400 SCALE IN INCHES PROPOSED WATER MAIN Z _+ K g u.j ----------------- •, -fit -- � � ,� (,n co OW 87" r z. )} 1 'I \ .� cl- ` R ter:• • 8 ` .t f g 8 - __ "fir j9— ---,' �,,,_ . �'� 7a � i/� f� >• / J • 14 p t- I pY � �} ft i� I k 37 ,+ it ^ 7)ui --. r JJ V I �T ITJG �C" %' 8 11.. �� a _ -- VERIFY SMEI _- REVISIONS _ DRAWN BY. APF 1111 /J PROJECTNUMBER TI£5�FRINIS I.'A BE NO. OESCRIPTION r DATE BY P—ED CEo. LLNEBEL07r /'�•ry�T t228 Whitefish Stage Road CK�CD-BY: GLL STARLING SHEET NUMBER NESSUFE50NE 33114.039 WCN IXt != F {� �'ON Ewe 3caliepe8. MT 5B86t ]MMMllliii%�1p�J�T1<Y��I N Suveyos APPR BY: GLL KALISPELL MONTANA :~~ 1 MAIERL� INC, pia ntlsb DATE- o�2om SO-A,s Phone: (408k?52.2216 DRAWING NUMBER �, LE„cOONo.NGLY sae�vwrKo •atace x Fax:(406)752.230t OAREVIEW WATER MAIN SIZES Fig. 1 �� _ �r ax i U.133841 D39 Staving I.IeadovstACAD',CI�SRWater Display dvg Plotted by dhansun 0n March 21, 2001 camnw o uowasoxsurttas. ec.to.�t DATE