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RES 1370 07/08/2008 RESOLUTION NO. 1370 A RESOLUTION OF THE CITY OF CIBOLO SETTING A DATE, TIME AND LOCATION FOR A PUBLIC HEARING ON THE PROPOSED UPDATE AND AMENDMENT TO THE LAND USE ASSUMPTIONS, CAPITAL IMPROVEMENTS PLANS AND IMPACT FEES FOR THE CITY'S DRAINAGE, WATER AND WASTEWATER IMPACT FEE PROGRAMS, AND A PUBLIC HEARING ON THE PROPOSED ORDINANCE ADOPTING THE UPDATE AND AMENDMENTS. WHEREAS, at the City Council meeting held on July 8, 2008, the City Council of the City of Cibolo, Texas received the proposed updates and amendments to the Land Use Assumptions, Capital Improvement Plans and Impact Fees for the City's Drainage Impact Fee Program, Water Impact Fee Program, and Wastewater Impact Fee Program (sometimes referred to herein as the "Amendments"); and WHEREAS, Chapter 395 of the Texas Local Government Code requires a public hearing on the proposed Amendments and the proposed ordinance adopting the Amendments before the City Council can take formal action to adopt or reject the proposed Amendments ; and WHEREAS,the City Council has determined that it is in the best interest of the City that the City Council consider adoption of the proposed Amendments and the proposed ordinance and take appropriate action to adopt or reject the same; NOW, THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF CIBOLO,THAT: 1. A public hearing be held on Tuesday August 12, 2008 at 7:00 p.m., at the Cibolo City Hall to discuss and consider the proposed update and amendments to the Land Use Assumptions, Capital Improvements Plans and Impact Fees for the City's Drainage Impact Fee Program, Water Impact Fee Program, and Wastewater Impact Fee Program. Any member of the public has the right to appear at the hearing and present evidence for or against the updates and amendments. 2. A public hearing be held on Tuesday August 12, 2008, immediately following the hearing on the proposed update and amendments to the Land Use Assumptions, Capital Improvements Plans and Impact Fees for the City's Drainage Impact Fee Program, Water Impact Fee Program, and Wastewater Impact Fee Program, to discuss the proposed ordinance adopting the said update and amendments. Any member of the public has the right to appear at the hearing and be heard on the proposed ordinance. 3. The City Manager or his designee is authorized to provide notice of the public hearings in the manner required by law, and to take any other action which the City Manager deems necessary or advisable in connection with the holding of the public hearings. PASSED AND APPROVED this S day of -51.. I , , 2008, by the City Council of the City of Cibolo Texas. THE CITY OF CIBOLO BY: (Y J nifer man, Mayor ATTEST: 72. Peggy Cimics, City Secretary Attachments Upon Passage: meeting agenda meeting minutes 2 City of Cibolo Impact Fee Cost and Fee Comparison - 2004 vs. 2008 2004 2008 Difference 2004 vs.2008 Type Fee Cost Fee Cost Fee Cost Fee Change % Change Water $ 744.56 $ 372.28 $ 4,553.88 $ 2,276.94 $ 3,809.32 511.6% $ 1,904.66 511.6% Wastewater Town Creek West Watershed $ 220.04 $ 110.02 $ 1,274.34 579.1% $ 637.17 579.1% Town Creek East Watershed $ 195.91 $ 97.96 $ 1,494.38 $ 747.19 $ 1,298.47 662.8% $ 649.24 662.8% Dietz Creek Watershed $ 264.68 $ 132.34 $ 1,229.70 464.6% $ 614.85 464.6% FM 78 South Watershed $ 321.89 $ 160.95 $ 1,172.49 364.3% $ 586.25 364.3% Drainage Town Creek West Watershed $ 524.03 $ 262.02 $ 517.40 98.7% $ 258.70 98.7% Town Creek East Watershed $ 547.62 $ 273.81 $ 1,041.43 $ 520.72 $ 493.81 90.2% $ 246.91 90.2% Dietz Creek Watershed $ 553.53 $ 276.77 $ 487.90 88.1% $ 243.95 88.1% FM 78 South Watershed $ 204.83 $ 102.42 $ 836.60 408.4% $ 418.30 408.4% NOTES: 1 Water,wastewater,and drainage fees based on a single service area each. 2 2004 costs/fees did not capture all eligible costs-i.e.debt service, row,etc. 3 2008 costs/fees capture all eligible costs-i.e.debt service, row, etc. 411 • „v,;• .;,.gid:” ==..: ,jos ice. S00,"--g.-04-',1:,.".;. ,,,,.5.c., k. a'v,:v z v,, ' g Water System Master Plan 7; 7" '' CITY OF CIBOLO „* g' � Impact Fee Study c i z< Fr» � Cyti v 11 ':.,E 1 is U J _ 414,"" .i.;"' .1YhY 4 ct r� i 4 Cl) O `1/ ' 1 3 ., LAst} 1.1 `" '.'` City of Cibolo 2 C--.7* o .a r4 , `.,', „*'Ix-Wu du* T£% PS FY A":,. 4.,..0 " ;.i z. FINAL—June 25,2008 ' µ Project No.4030.500 Lc''„ ..'i 7y ~z - S CITY OF CIBOLO—IMPACT FEE STUDY Water System Master Plan 4111 Prepared for: City of Cibolo P.O. Box 826 Cibolo,Texas 78108 Issued under the interim review authority of Steve Wenzel,P.E., #59082 By: Espey Consultants,Inc. EC Project No.4030.500 3809 South 2nd St., Suite B-300 Austin,Texas 78704 FINAL—June 25,2008 T(512)326-5659 F(512)326-5723 www.espeyconsultan ts.com i or c,g Vi• r° City of Cibolo/ Impact Fee Study—Water System Master Plan Table of Contents 1.0 Introduction 1 1.1 Executive Summary 1 1.2 Abbreviations,Definitions, and Questions about this Document 1 1.3 Description of the Planning Area 2 2.0 Existing Water System 4 2.1 Water Supply 4 2.1.1 Water Rights 4 2.2 Water Storage 4 2.3 Water Distribution 4 2.3.1 Water Mains 5 2.3.2 Water Pumps 5 2.3.3 Pressure Zones 6 2.3.4 Meter Distribution 6 3.0 Water Consumption 6 3.1 Existing Water Consumption 6 3.2 Unaccounted For Water 8 4.0 Existing System Hydraulic Analysis 9 4.1 Analysis Technique 9 4.1.1 Method of Analysis 9 • 4.1.2 System Model 9 4.1.3 Planning and Design Criteria 9 4.1.4 Computer Model Correlation 10 4.2 System Analysis 10 5.0 10-year Capital Improvements Plan 10 5.1 Future Land Use Assumptions 10 5.2 Capital Improvements 12 5.3 Future Water Supply 12 Table 1: Current Water Meter Count 6 Table 2: Average Daily Water Usage by Month (Gallons) 7 Table 3: Planning and Design Criteria 9 Table 4: Equivalencies 11 Table 5: Surface and Groundwater Rights Summary, City of Cibolo,2004-2017 13 Table 6: Projected Supply Deficit/Surplus, City of Cibolo, 2007-2017 13 Figure 1 Planning Area 3 Figure 2 Daily Average Water Use and Capacities 8 Appendix A: Existing System Map Appendix B: Future Land Use Assumptions Appendix C: Capital Improvements Summary Table • P•Iactive14030.500 CIP Study rptlfrnallwatersystemplan080624.doc i FINAL—06/24/08 ‘0,- c,„ ' r° City of Cibolo/ „�` Impact Fee Study—Water System Master Plan 0 .1=11.. 1.0 Introduction 1.1 Executive Summary The 2007 Water System Capital Improvements Plan for the City of Cibolo has been developed so that the projected water need for the municipality can be met for the next 10 years. The plan was developed by Espey Consultants, Inc. with guidance from City staff and the Impact Fee Advisory Committee appointed by City Council. The plan should be reviewed and updated on an annual basis, in connection with updates to the City Master Plan or other planning documents, or as needed to reflect changing conditions. The City's existing water system was modeled to determine the existing level of service. There are currently 3,577 Living Unit Equivalents (LUEs) in the City's Water Service Area. Future land use assumptions were established to guide future system improvement needs. There will be 9,510 LUEs in the City's Water Service Area by 2017. Twenty-two Capital Improvement Projects totaling $27,018,197 are necessary to accommodate the 5,933 LUEs attributable to growth. Including eligible finance costs as allowed under Local Government Code (LGC) §395.012(b) and providing the alternative 50% credit described under LGC §395.014(7)(B),the impact fee is calculated to be $2,276.94 per water service unit. Ill1.2 Abbreviations,Definitions,and Questions about this Document This document makes reference to numerous abbreviations which may not be familiar to all readers. The following guide clarifies many of these abbreviations. AWWA—American Water Works Association CCN—Certificate of Convenience and Necessity CIP—Capital Improvements Plan City—City of Cibolo Committee—Impact Fee Advisory Committee CRWA—Canyon Regional Water Authority ETJ—Extraterritorial Jurisdiction fps—Feet per second (velocity) gpd—Gallons per day(volume rate) gpm—Gallons per minute (volume rate) GVSUD—Green Valley Special Utility District LGC—Local Government Code LUE—Living Unit Equivalency MG—Million gallons (volume) MGD—Million gallons per day (volume rate) PRV—Pressure reducing valve psi—Pounds per square inch (pressure) IIITCEQ—Texas Commission on Environmental Quality O:laclive14030.500CIP Siudyrpllfinallwarersyslemplan080624.doc 1 FINAL—06/24/08 `.,0r r a City of Cibolo/ • Impact Fee Study— Water System Master Plan Ws,_Water Supply Corporation Readers with specific questions may direct them to the City Manager at(210) 658-9900. 1.3 Description of the Planning Area For the purposes of this study, the planning area is defined by the City's Certificate of Convenience and Necessity (CCN)1. This is the City's water service area. This area is defined by jurisdictional and geographic considerations, existing water service, and practical limitations of service. The planning area encompasses an area of 5,596 acres (8.74 square miles). The adjacent water service areas receive service from City of Schertz and Green Valley Special Utility District (GVSUD). The northern portion of Cibolo's city limits and portions of its ETJ are actually served by GVSUD. Properties within the GVSUD service area are not subject to impact fees assessed by the City of Cibolo. Figure 1 shows the location of the CCN and Planning Area. • • The City's CCN for water service is CCN#11903,submitted on March 1, 1986 and created on November 2,2000. P•laciive14030.S00C/PSiudylrpilfinallwatersystempIan080624.doc 2 FINAL—06/24/08 or cle ��` r° City of Cibolo/ _• ` Impact Fee Study— Water System Master Plan • Figure 1 Planning Area i::,.:. J:eti. ,c' 'saw- " c! 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":_!4{:: - - I..sj3, 5, _ '•�` �T" .alar _•51<."A•'S,'j+�i' try - , i'"rrr:3-T r +�"SFr: ., Fi`Yi.=':l-� ~- .s-.. �.,..1.�:� ar'.�}'��^'¢- (}' i';<p., n„ty`s ��5x•' -_ ;.a. ,.ra•t�. _ _ !�5.rro.,...`�.n'°rx- .,. r �{"!`;-'�n1�.t,r-!"".. 4i��," '"dik..• .],t'. - `x?- h..--,,., :3i 1•f��:..:0°.iC..,,J: +,-", v.Y _ �L.. -.-.°"'!'..r - .F :.,.mak:'`-.x,'. � ..k-.:., _ L. �. - h �,Y=.'fir-'� +:�, :'�J =:!^-' _ _ q C2 3�: 1.ra_ .5r�:_3. _ ^�. - �"=r'`-;,,1'tT-rte ,.- • - _ 5:75- - f A�T''Sv - " .ma +:err _ e" �g1 - - ry, • - ��A _ ar y.� ��s !t ;r rt.Ya - r AY` �5 5 i�OO "T�} ' t �y a• t°' r ;:�.t -L .`Yr'L -e.t�' - - -v'a -:�i::':Jl:;: C ry - -fir_ _ il- Z 5 it fF �••-r _ - - _" •at:. 4' :a.a f _ w. - bh^ - - )'y � .Z.sro'.I _ f-r -- il 1. .,k lk=i,��1 :.',.rte-'., -- s'� fib',--:, _ s�. fi 7• , 3e,`y{'•n • =Ii — _ -,-tom,i� • g� • a� Y. _ i �§�.= is i1. = z�`:„f - .:tis r13 - - bl. - 1S%.�'A! •! -'y`• ski' - .":'3'• {r _ - f < _ - ski - `f: - - ' Wit'=- ^.�-�•- - - .:.P3'- :-ate s. � .��`.`,` „ry_ /� - `5 '�vri. ih —:ice :5—. 4a:� _ _ _ L� - - a - - r - 3' 8,- :a:r ''boo: •t' _ fAbb 2 O, -;FMS:.` - ',rt` •'s�. _ _- • .. .' ``,�, . .r~,. _z. �..-. �- I”- r 5 - 3 ,;. ,' .-- Cibolo City Limits w ., .. t : r - = 4 =-..:, ; I' a • Cibolo CCN-Bounda - rY &Sernce Area :PMeIMeW630 60D GP SludylGlSle>tM1lwaler service an repoitmxd _ --�' • P•Iaclive14030.500 CIP Sludy rpllfinallwarersysremplan080624.doc 3 FINAL—06/24/08 or Gi0 ` r G City of Cibolo/ Impact Fee Study—Water System Master Plan 2.0 Existing Water System The purpose of this chapter is to provide a description of the existing capital improvements within the service area and the costs to upgrade, update, improve, expand, or replace the improvements to meet existing needs and usage and stricter safety, efficiency, environmental or regulatory standards. In addition, this chapter provides an analysis of the total capacity, level of current usage, and commitments for usage of capacity of the existing capital improvements. 2.1 Water Supply The City of Cibolo currently draws its potable water from the Canyon Regional Water Authority(CRWA) water treatment plant at Lake Dunlap. 2.1.1 Water Rights The City of Cibolo is a member entity of CRWA and contracts its surface water rights through them. Other members include BexarMet, Green Valley SUD, City of Marion, Crystal Clear WSC, East Central WSC, and Springs Hill WSC. The City has a contract capacity of 1,098,073 gallons per day (gpd) and up to 1,427,495 gpd based on a contracted peaking factor of 1.3. Cibolo's ownership of the total 15,200,000 gpd plant • capacity is specified at 1,702,732 gpd, approximately 11%. Any water processed over and above the ownership amount will incur a system capacity fee as determined by the member entities. 2.2 Water Storage There are two main service water storage tanks at Cibolo Valley Drive and Deer Creek Boulevard. The ground storage tank's capacity is 1 million gallons (MG) and the average daily minimum storage is maintained at 984,395 gallons. The cylindrical elevated tank's capacity is 1.25 MG and the average daily minimum water storage maintained is 0.85 MG. The volume of this existing elevated storage allows for approximately 12,500 connections based on the Texas Commission on Environmental Quality (TCEQ) 100 gallons per connection requirement (for elevated storage). Assuming a 200 gallon per connection total storage requirement (also a TCEQ requirement), and a combined (ground and elevated) volume of 2.25 MG, the City has storage capacity in place for 11,250 connections. The City currently has approximately 3,500 connections, and therefore the current storage is adequate to meet TCEQ's requirements for storage, both elevated and total. • 2.3 Water Distribution P•lacrive14030.500CIPSrudylrprlfinallwarersysremplan080624.doc 4 FINAL—06/24/08 o, c,@ 4 v° City of Cibolo/ r �$ Impact Fee Study— Water System Master Plan 2.3.1 Water Mains The city currently maintains a network of approximately 13 miles of pipes (10" mains and larger) within the city's jurisdiction to distribute water to individual meters from storage tanks. An existing system map is shown in Appendix A. 2.3.2 Water Pumps Three booster pumps provide water to the city's distribution system. These pumps, numbers 1, 2 and 3, are located at the pump house on Cibolo Valley Drive. These pumps move water from the standpipe to the elevated tank and distribution system. The simultaneous operating capacity for the city's booster pumps is 850 gpm (1,224,000 gallons per day), considering limitation and losses due to suction, discharge piping, or power arrangement. Cibolo's booster pump station has the capacity to meet its contract capacity. The following is a summary of the pump capacities. Number 1 Rated Capacity: .26 MGD 250 gpm 148 feet 77.2 psi • Actual Capacity: .40 MGD 376 gpm 96.7 feet 77.2 psi Number 2 Rated Capacity: .52 MGD 463 gpm 156 feet 88.1 psi Actual Capacity: .60 MGD 533 gpm 122 feet 88.1 psi Number 3 Rated Capacity: .52 MGD 463 gpm 156 feet 88.1 psi Actual Capacity: .60 MGD 533 gpm 122 feet 88.1 psi Five booster pumps provide water to Cibolo's elevated tank from the CRWA regional supply system. These pumps are identical in design and capacity. The simultaneous operating capacity for the CRWA's booster pumps is 11,000 gpm considering limitation by suction, discharge piping or power arrangement. The rated capacity of a single pump exceeds Cibolo's contract capacity and highest historic peak use. Numbers 1-5 Rated Capacity: 2.376 MGD 2,200 gpm 500 feet 216 psi • Actual Capacity: 2.376 MGD 2,200 gpm 500 feet 216 psi P•Iacrive14030.500CIPStudylrptlftnallwatersystemplan080624.doc 5 FINAL—06/24/08 or [iB ��` r° City of Cibolo/ Impact Fee Study— Water System Master Plan i 2.3.3 Pressure Zones The planning area served at this time is currently in one pressure zone. 2.3.4 Meter Distribution Table 1 summarizes the size and count of meters in the existing system. The smallest size currently used is 5/8" and the largest is 10". The American Water Works Association (AWWA) standard equivalency was utilized to determine the total number of living unit equivalencies (LUEs) for the City of Cibolo's water service area, based on the size and number of meters. There are 3,577 LUEs being served by the existing system. Table 1 Current Water Meter Count Current Water Meter Count and Estimate of Living Unit Equivalency (City of Cibolo,February 2007) • Number of 2007 Number of Meter Size Meters LUEs per Meter� LUEs %of total 5/8" 3,310 1 3,310 93% 1" 14 2.5 35 1% 1 1/2" 7 5 35 1% 2" 4 8 32 1% 4" 2 25 50 1% 10" 1 115 115 3% Total 3,338 157 3,577 100% Notes: 1) Source:AWWA 3.0 Water Consumption 3.1 Existing Water Consumption Average daily water consumption totals for the city are shown below in Table 2 broken down by year and month. 1111 P•Iactive14030.500CIPStudylrptl inaliwatersystemplan080624.doc 6 FINAL—06/24/08 o' c'°°, r City of Cibolo/ UI '`� Impact Fee Study-Water System Master Plan ,.., • c Table 2 Average Daily Water Usage by Month(Gallons) Month 2002 2003 2004 2005 2006 January - 310,710 403,774 402,778 768,903 February - 332,630 390,379 460,500 689,929 March - 398,484 411,129 539,516 925,129 April - 573,067 435,100 839,733 1,172,100 May - 758,097 597,613 936,067 1,179,387 June - 539,567 541,067 970,600 1,343,400 July - 480,935 678,097 1,025,323 1,333,097 August - _ 761,516 856,903 1,172,129 1,709,581 September 418,000 _ 588,033 731,900 1,186,100 1,113,600 October 473,000 478,484 652,452 978,323 957,065 � November 283,000 500,500 460,167 807,267 932,333 December 427,000 428,484 495,586 688,000 799,323 Annual Average 400,250 512,542 554,514 833,861 1,076,987 ' Contract 1,098,073 GPD Peak Daily 1,702,732 GPD Source: City of Cibolo The historic daily average water use is also presented in the following chart, to illustrate the City's historic use pattern with respect to its contract capacity, its pumping capacity, III and the CRWA's pumping capacity. 1111 P•inctive14030,500 CIP Siudylrptlfinallwatersystemplan080624.doc [71 FINAL-06/24/08 r� City of Cibolo/ u Impact Fee Study— Water System Master Plan • _s Figure 2 Daily Average Water Use and Capacities Daily Average Water Use September 2002-May 2007 3,500,000 Daily Average Water Use 3,000,000 Contract Capacity 2,500,000 Contract w/peaking 2,000,000 c ----Cibolo booster pump capacity 1,500,000 1 Single CRWA booster pump capacity ' 1,000,000 ti &.t `� ? f .F i.. s .. .. .*/..ar -_.-:. Y;"... 'i'K .til a si N W 5 4. y u a 'g W Month and Year V Based on an analysis of recent water use records, the existing usage rate per LUE was established to be 361 gallons per day (gpd). This rate was determined by calculating the average daily water usage for each month divided by the number of meters present on the system each month during the year 2006. This value was reviewed and found to be consistent with other recent, regional studies and standards and subsequently adopted by the Impact Fee Advisory Committee. 3.2 Unaccounted For Water Normal water loss includes such items as main flushing, testing, undetected leaks, and water obtained through hydrant usage by different entities. Reduction of water loss percentage is recommended, as it will affect future water supply projections. The City does not have a formal water audit program at this time. • P•Iaciive14030.500 C/P Siudylrpilfinallwaiersysiemplan080624.doc 8 FINAL—06/24/08 or cie r`G City of Cibolo/ '` Impact Fee Study— Water System Master Plan 4.0 Existing System Hydraulic Analysis In order to determine the improvements required to meet existing needs, a hydraulic analysis was performed. 4.1 Analysis Technique 4.1.1 Method of Analysis Hydraulic modeling software was utilized to accurately calculate the hydraulic response for several scenarios including fire simulations and peak hour demands. Steady state simulations were performed with MWSoft, Inc. H2OMap Water GIS Suite v. 7.0. These types of simulations give a "snap shot" of the system based on demands and elevation/pressure of water supply to the system. No `Extended Period' simulations were performed.2 4.1.2 System Model The existing water distribution system was imported into the hydraulic modeling software. Pipelines with diameters smaller than 10 inches were not modeled. Water demand was allocated to different nodes in the system based on land use and calculated water demand.3 Platted lots were assumed to be occupied for the purposes of flow • allocation, since they represent a commitment to current capacity. 4.1.3 Planning and Design Criteria The design criteria utilized in the model were developed from state standards, known existing system characteristics, and generally accepted engineering principles. The criteria are summarized in the following table: Table 3 Planning and Design Criteria Parameter Criteria People per connection 2,8 Average Day Demand 361 gpd Maximum Day Demand 722 gpd Fire Flow Residential 1,000 gpm Fire Flow/Other 3,000 gpm Minimum Maximum Day Pressure 50 psi Minimum Average Day Pressure 50 psi Minimum Peak Hour Pressure 35 psi Minimum Fire Flow Pressure 20 psi at Maximum Day Demand Total Storage 200 gal/LUE Pump Capacity 0.6 gpm/LUE Max Velocity-Peak Hour 5 fps Max Velocity-Fire Flow 10 fps Max Static Pressure 110 psi Max Pressure(must provide PRV) 85 psi 2.An Extended Period simulation evaluates the impacts to storage and pressure in the system relative to diurnal use patterns and event patterns,such as a fire,for specific periods of time. A steady state simulation assumes an instantaneous supply and demand condition. • 3 A"node"in the hydraulic model is the representation of a point of demand from the system. Nodes are connected by pipe links. P•lacttve14030.50OCIPStudylrptlftnallwatersystemplan080624.doc I 9 FINAL—06/24/08 Ai or C e City of Cibolo/ Impact Fee Study— Water System Master Plan 1111 4.1.4 Computer Model Correlation The modeled system was not calibrated. 4.2 System Analysis The existing system was analyzed. Fires at several different locations were modeled with peak day demands. No deficiencies were identified during this analysis. All velocities were below 10 fps and pressures at all modeled nodes were well above 20 psi. This is consistent with observations and reports by operation personnel and City staff. Results outside of these parameters indicate the need for improvements to the system, as they will negatively impact the system and its ability to serve the demands. 5.0 10-year Capital Improvements Plan The purpose of this section is to provide a description of the capital improvements and their costs necessitated by and attributable to new development in the service area over the next ten years. This section also defines the specific quantity of water consumption for a service unit and • provides an equivalency table establishing the ratio of a service unit to various types of land uses, including residential, commercial, and industrial. 5.1 Future Land Use Assumptions Future demands to the water system are determined by future land use assumptions. These assumptions were defined in workshops with City Staff, the Impact Fee Advisory Committee, the Planning and Zoning Commission and the City Council. The intent of the workshop exercises was to evaluate the entire city's planning area(which extends beyond the water service area) and determine the most likely, balanced and orderly land use pattern for the period 2007- 2017. The anticipated growth pattern of the city, in terms of the location, use, and intensity of the use, is based upon the following considerations: • Average annual residential building permit growth of 14%for the period 2003-20074 • Average annual sales tax revenue growth of 31%for the period 2003-20075 • Population projections of the 2005 Master Plan6 • Trend of higher consumer expenditures per household closer to Cibolo's center, relative to greater distances from the city's center 4 Source: Building Inspections Department,City of Cibolo 5 Source: Allocation Historical Summary,Texas Comptroller of Public Accounts, http://ecpa.cpa.state.tx.us/allocation/AllocHistjsp 6 The adopted Master Plan presents several scenarios for growth. The city's population growth as estimated by Census and building permits,is currently following Scenario'C',which forecasts a population of 28,537 by 2015. This scenario represents an average annual growth rate of 24.9%. Source: Figure 2—Population Projections,City S of Cibolo Master Plan,2004. Source: SitesUSA,Census-based Demographic Profile prepared for City of Cibolo,September 2007,page 9. P•lactive14030.500CIPStudylrptlftnallwatersystemplan080624.doc 10 FINAL—06/24/08 ar c/a City of Cibolo/ Impact Fee Study— Water System Master Plan 411s • Retail and commercial uses are anticipated along state highways and major intersections, in response to the population growth and anticipated demand for services. • The city's largest private employers have announced plans to expand their operations and hire additional workforce. • The availability of utilities and regional transportation infrastructure. • The location of floodplains,railroads and similar constraints. • The application of prudent land use planning principles, such as the transition of use intensity and the creation of a center of high activity. Residential and non-residential land use classifications are indicated as follows on the attached copy of the Future Land Use Assumptions Map (Appendix B). Residential uses indicate the future density in terms of dwelling units per acre or DUA. The land use classifications include: cluster residential (0-2 DUA), single-family residential (2-4.5 DUA), attached residential (6-12 DUA), mixed use (6-16 DUA), institutional, commercial, industrial, and park/open space/preserve.8 Since the Future Land Use Assumptions serve as a policy document(the Future Land Use Plan), the map initially describes a build-out scenario. However, for the purposes of impact fee calculation, the Future Land Use Assumptions must reflect the estimated level of growth in the planning area within the statutory ten-year planning horizon.9 To this end, a probability overlay exercise was undertaken in which each planning subarea was assigned a "probability of development" value (between 0.0 and 1.0). These values act as a coefficient to provide a weighted estimate of future demand at the end of the planning horizon, thereby • avoiding an overestimation of future demand and resultant facilities and water supply. Future land use equivalencies for service units follow: Table 4 Equivalencies Land Use Equivalency Table Land Use Classification LUE Conversion Single-Family/Cluster 1 Dwelling Unit=I LUE Attached Residential 1 Dwelling Unit=0.7 LUE Commercial' 1 LUE/1660 sf floor area Industrial 1 LUE/4000 sf floor area Institutional' 2.5 LUE/acre Mixed Use' 50%Commercial/Retail/Office 30%Residential 20%Institutional/Public/Civic Notes: 1)Commercial development assumes 20%available land area is building area 2)Institutional use ratio is consistent with other direct methods 3)Mixed use assumes ratio identified in Table 20,City of Cibolo Master Plan Demands are projected for each area by using 361 gpd per LUE, as developed in Section 3.1. The existing system serves 3,577 LUEs. The total number of projected LUEs necessitated by Cluster residential development is characterized by denser areas of development and larger areas of set-aside open space,resulting in a low,overall average density. Attached residential development is characterized by narrow lots Sand often zero side yard setbacks,such as townhomes,garden homes,patio homes,etc. 9 Texas Local Government Code§395.001(5) P•laclive14030.500CIPSeudylrpil Inallwalersyseemplan080624.doc 11 FINAL—06/24/08 or c,„0 City of Cibolo/ :. 401, Impact Fee Study— Water System Master Plan 411 �4 and attributable to new development is 5,933. In order to serve these additional units, capital improvements and additional water supply are necessary. 5.2 Capital Improvements Improvement alternatives were placed into the hydraulic model (refer to Section 4.1.1) to determine the minimum requirements to serve the projected demands. The improvements provide a minimum of 34 psi under fire flow conditions, above the required minimum of 20 psi. With the exception of the short pipe feed to the existing tank, all velocities are below the required maximums. The table included as Appendix C describes the type of improvements required and associated costs as allowed under Local Government Code §395.012, to meet the City of Cibolo's anticipated growth until 2017. It is anticipated that these projects will be implemented according to most immediate need, and will become part of the City's 5-year Capital Improvements Program (CIP) as prioritized by the CIP Committee (separate from the impact fee committee) and City Council. 5.3 Future Water Supply The City of Cibolo currently holds 1,350 acre-feet (AF) of surface water rights through CRWA. The City is also participating in the development of the Wells Ranch Groundwater Supply • Project and anticipates delivery from this source in mid-2009. Phase I of this project is anticipated to yield approximately 700 AF per annum for Cibolo. Phase II is anticipated to come on-line in 2012 and produce another 1,300 AF per annum. The following table (Table 5) summarizes Cibolo's surface and groundwater rights through 2017. • P:lactive14030.500CIP Studylrpllftnallwatersystemplan080624.doc 121 FINAL—06/24/08 0, C:B r�, City of Cibolo/ Impact Fee Study- Water System Master Plan • 'S Table 5: Surface and Groundwater Rights Summary,City of Cibolo,2004-2017 Total Existing Current Water Rights Surface rights (Ground and Year through CRWA Groundwater Surface,AF) 2004 875 875 2005 1200 1,200 2006 1350 1,350 2007 1350 1,350 2008 1350 1,350 2009 1350 700 2,050 2010 1350 700 2,050 2011 1350 700 2,050 2012 1350 2000 3,350 2013 1350 2000 3,350 2014 1350 2000 3,350 2015 1350 2000 3,350 2016 1350 2000 3,350 2017 1350 2000 3,350 • In order to meet the anticipated demands of the next 10 years, the City will need to acquire additional water rights of approximately 841 AF. A linear phasing of the projected demand is assumed from 2007 through the end of the planning horizon. The following table summarizes the relative deficit/surplus water supply. Table 6: Projected Supply Deficit/Surplus,City of Cibolo,2007-2017 Total liiir'emeoiiiIii,: Existing Annual Demand :r,;.,WaterPgccliase'=; Running Water projections c=:;Requrred'f(Impact4 Total Rights based on Future Projected [s�N'ecessitaedbyand Proposed Proposed (Ground Land Use Annual AtciIlutab e3.to News Rights Surplus/ and Surface, Assumptions Surplus/ Projectedr:r1De:10:men_t)<`;`(Ground and Deficit Year AF) (AF) Deficit(AF) LUES w''' '''? �3, Surface) (AF) Notes 2004 875 587 288 ;>>•s. k±;.-0,.7,::':,,:4, - 2005 1,200 939 261 '' "-'�_" `_ ' 875 S.t may' ei '1-A - 1 200 - 2006 1,350 1,209 141 ,1c.}' " , 1,350 - 2007 1,350 1,052 298 3,577 %`:'-`.,;_... ,.1 r` 1,350 - 2008 1,350 /,332 18 4,170 i,7 :`Ka.:O = :-_ t 1,350 18 2009 2,050 1,612 438 4,764 -'-4 g=:>"0 '==.:-.. ! 2,050 - 438 Phase I Wells Ranch 2010 2,050 1,892 158 5,357 `=1 :' '.1!AV,Z4- 's 2,050 158 2011 2,050 2,171 -121 5,950 5 `;"'121 e'.`;?;;b 2,171 0 prop.surface water purchase 2012 3,350 2,451 899 6,544 'i2>%',0 'w'""='=_<:? 3,350 899 Phase II Wells Ranch 2013 3,350 2,731 619 7,137 F;::===;.,i$;r;,0=°. 3,350 619 2014 3,350 3,011 339 7,730 1:'''''=.0=:-;`.''`Y; 3,350 339 2015 3,350 3,291 59 8,323 '-: ^s' {.0<:' :;ma3,350 59 2016 3,350 3,570 -220 8,917 '*'= X20; = ,!:',!; 3,570 0 prop.surface water purchase 2017 3,350 3,850 -500 9,510 w`=� '^'`''.'5001:: .'.= 3,850 0 prop.surface water purchase • P•Iactive14030.500 CIP Study rptlfinallwatersystemplan080624.doc 13 0 FINAL-06/24/08 or Cid City of Cibolo/ Impact Fee Study— Water System Master Plan 111 Appendix A Existing System Map • • P•Iacttve14030.500CIPStudylrptlfrnallwatersystemp1an080624.doc A FINAL—06/24/08 _ -_ 5E:• 'I' "t"-� is _ i; � f H� �� =aw':`1`I'�'-"u3J"y,`:. a,t �..�` —._1-� :_--_ -11-. 1-77-Asp-4__,_:--4-T,SEs ;�':- - - P�_ mC` _ :i--- _ _. :j. - `i, --- aaii:!;i(L;`1 p } - 1,. _ - ;•[;>q[ I '� _ ^ ui.• E-: moi ,,1 _ �:Z H? ., F,I I i• 4:-,,,,,,,_ - , ' ._ +,.,, 1'.rJ - :Ji' m r. r� .. ....L..k _ -r� 5 1 —__- .. 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I, t f 4-.:1-..,:.K,..7,...s-,;:.-!,::.-.---,-- -,-- -{ I A I It �'�' � , 1, .i'''.1,1:;',',--,,,-4.-:-`: l'.3= LOINER'SEGUIN:R \ 5. 1.-.. - -• ,_-k-- (.L I -II Espey Consultants,Inc. 0 5O LOCO 2.000 EXHIBIT A El F,nvironmLntal&Fmginceru,g Services ® EXISTING WATER SYSTEM MAP Fee, CIP AND IMPACT FEE STUDY September2007 CIBOLO,TEXAS PROJECT#4030.500 P,saMO]0.CIP 9u041Aa0eMIX0.4030-600ea Emu,yVpp,nq,mJ or µ` r o City of Cibolo/ `� Impact Fee Study— Water System Master Plan III Appendix B Future Land Use Assumptions III • i P:lactive14030.500 CIP Studylrptlfinallwatersystemplan080624.doc B FINAL—06/24/08 `�rroa" �3 ta, � �?9�..r c. -�- ..-_�_ _•'-n-, - -,� t T g-r- `- ----- Wiz=` -.. � .�_�;?L,.;,�.��7g:.+^ �f� E fS`=`;•��C EXISTING 1.25 MG ELEVATED l a FUTURE 1.25 MG ELEVATED'' 3 Ft r -, fs }P`.* STORAGE TANK&1.0 MG s F s;s. _•'.` 1,� a'NV r 'v'- '' - STORAGE TANK& 75 s< _", e T E T neje Y + I, � r-1°= GROUND STORAGE TANK - �, r•" GROUNDS ORAG ANKH' s 3 iy�n _ '``'uy .c.r� ='f*`X is°1d,t,:� '�I ,i•�". a ° 1 .� � a s ,.Y:�sw� r� " '' i ,1• tix�i 1 � .fi y`q, }r � 3r.- fi:,.'z=.. 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BvzR { '`*• >T:a3 - G ,.v§T'- 'Yn:Yawaa=r.J i u _ en.`•` '?2 y '► P „•1 ati„i.., tr yL a g 'S --_II a -caD.E` nr�»-S, yt f 3 ice- y i-M� -. ---.r� a is Sf- �#}S s`A h#,,. `w 'ii'�p _t a Y: 1 -- �kY u t' �m a� _ LL ur'rt' r..,g i RIN -__i ° - t ,� -_r' grtu z .xa, _ yaI�l-�,- ski RI 1 )A,,<.s,�'^'*"_� "t,'<t+ �1 r--` I k• VS' "a�.. _ t Laq f # ��r r'� W6fa k .+L. ! - ik -! - � � '�" �YS�E t1t• �'� X111 -w_._ .. � rl ��` +=�} { � � •-_ �, .r 1 i tett � ��c f F_-_ �� = ��" ��'�. al _end MA- - .` LEGEND �t; �§ Q TANK - - - tit, PRVSTATION -! .If CIBOLO CITY LIMITS tIt "'' -Mit, t': _ .�_ ®•i - -� - ,`�� ;y FUTURE LAND USE iwK ! ) 11Y tilt t - - q :\� CLUSTER(D.2 DUN SINGLE } E f �- - �5 } � t■ - - Ft13 ' � 3 -.c.- SINGLEFAMILY(24.5DUA) � ,(k7 # t tL}li i)\,,-'t .�• `PSR^ "r 3T Y k S1s:_'�i ATTACHED RESIDENTIAL(6-12 DUNY3-r` }L - -``` - i_, t' LOWER SEGUIN Rb __-- -� •� ? i _ ®MIXED USE(6-16 DUN - - r•�' -- j • i '�- I gS5 ®INSTITUTIONAL USE St - -- 3 •••8 - r . C - y'�`'s .^t. ..a�at •�� 4 a i - --ate-u t ®COMMERCIAL _ - 1 ---�tty;-t, •( s- .� .mss --. -�-_t�` e�'�• _ ____ p - INDUSTRIAL tk rtb�-3'.� i}"' 3� 1 a.Y s.'19 x I t fdt- 'T4 xe -r _ s--- - �`a _ - _ .^�.�wg .�z•� PARK OPEN SPACE,PRESERVE m.zf 4, �` . - y WATER UNE EXISTINGI`I;� FUTURE • >ct4 LLL- ' EXHIBIT B Espey Consultants,Inc_ 0 500® FUTURE WATER SYSTEM MAP +'� EnvlronmOnW&Frlginecev}g Sr?vice R AND FUTURE LAND USE ASSUMPTIONS CIP AND IMPACT FEE STUDY SEPTEMBER 2007 CIBOLO,TEXAS PROJECT#4030.500 rae...Vmasooars•mcu+emwmocana r,A..w,,.,sre.m wt�,.w Dr CI. G City of Cibolo/ Impact Fee Study— Water System Master Plan • t�4 Appendix C Capital Improvements Summary Table S • P•lactive14030.500CIPStudylrptlfnallwatersystemplan080624.doc IM71 FINAL—06/24/08 • Impact Fee Study June 24,2008 City of Cibolo CITY OF CIBOLO Water Capital Improvmeat Projects length(LE) (or other Olnance Costa specified Conatruc0on ROW/Easement Engineering/Surveying/ allowable under Project Number Location Improvement Type quantity) Cool Condngency AcguWOoo Permitting coati LCC¢395 Total Cools Notes WI Main Street 12'Pipeline 15,750 0828393 030,000 SO 578.907 5482389 01.439.889 W2 Aquavism 12'Pipeline 2.300 5181,125 032,603 07.128 545281 0150.367 0416304 W3 Heeckerville Road 16'Pipeline 17,000 51.606300 3289.170 552.686 5401.623 31327.739 S3.677.720 W4 FM711/Pfeil Road 12'Pipeline 9,750 5767.813 0138206 $30217 5191,953 0637.427 01.763.613 W5 Schaefer Rood 12'Pipeline 4.350 5342,563 061.661 013.481 $85,641 5284390 0787,736 W6 Greenbelt 12'Pipeline 2.850 0224.438 540399 08,43 556,109 5186325 0516,103 W7 Ariapc Road 12'Pipeline 2,850 5224,438 540399 08,833 $56,109 0186323 5516.103 W8 lower Seguin Road (6'Pipeline 3,150 5297,675 053,382 09.762 574,419 3246.022 8681460 W9 Wtedner Road 16'Pipeline 9.750 0845,884 SO SO 072,030 5462.445 01.380.359 W 10 Buffalo Crossing to Weidner 12'Pipeline 3,000 0236230 542,525 09.298 559.063 5196,131 5543266 W I I High School East 16'Pipeline 3,000 5283.500 051,030 09,298 070,873 5234.307 0649.009 W12 High School South(710S) I6'Pipeline 3,400 5321300 057,834 510537 580,325 5265.548 0735344 W13 High School South(E-W) 12'Pipeline 4.000 5315.000 556,700 $12397 $78,730 0261308 3724,355 W14 High Scheel South(E-WDndad) 12'Pipeline 2.300 S181.125 532,603 07.128 045,281 0130,367 5416304 W15 FM 1103(Dedicated Tank Line) 16.Pipeline 18.100 01,250.920 $0 SO 087,950 0674.523 4,013393 FM 78.sloop Tolle Rood to now OST W 16 High Schoal East PR)/Station EA $31.500 55.670 $9,000 57.675 030.533 584.580 W17 FM 1103 PRV Station EA 031.500 05.670 39.000 57.873 030.535 584,380 W18 Main Street PRV Stalin EA 531.500 03,670 09,000 07.873 530.535 384300 WI9 Northeast Cibolo 1.5 MG EST L.S. 51.815.000 0100,000 560.000 0180,000 01.100.803 03283.803 Elevated Stomgo Tank W20 Northeast Cibolo .75 MO GST L5. 487500 $141,750 022.000 5196,875 0648.691 01,796,816 Ot000d Storage Tank W21 Northeast Cibolo 115 MOD Pump Station L.S. 0600.000 5108,000 016.000 0150,000 5493.810 01367.810 Pump Station W22 Wella Ranch Water Supply Project(1200AF) L.S. 03,155,132 5567.924 SO 5232411 02246,138 53.975.466 Pump Station STotal Con 027.018.197 Total LUE, 9.310 Existing LUES in Water Service Ara 3.377 Total LUES attributable to growth 3,933 Initial Impact Fee Calculation 54,553.88 50%Credit 52,276.94 Water Impact Fee 02,276.94 Popep Consultants,Inc. Rtatre.039300 LIP StudetSpre esneamar_Aojslmeoe23ak5Wata • ..._...-"' .: _TmyeM„4-"4--` - a 0Ait • -:-..-4-,;',".6-,-,P - "`9t-,,-3,;-, 10-1-,51.{:,a".-,-7.,:-,: 4.5-SV-I' : '£2'14' ° _ _°4 t0. Wastewater System Master Plan ya 41 },'- CITY OF CIBOLO k 1 -hi_� Impact Fee Study 3, p �Z • _s C 'Y" tr• 4' , Cl) 41orn, Cit 0 . .. 1µy 1L .;4-;;;U:.1`1 ` C.) _ar ` , -- ` City of Cibolo ::-::?4,41.44 6. lk 0 hn .s sctfl_ FINAL—June 25,2008 V ,� ;r I Project No.4030.500 )471.0.% ,-3-4-4.,&6--i,;,-t, . , {,dry1'r.t�p - • CITY OF CIBOLO—IMPACT FEE STUDY Wastewater System Master Plan III Prepared for: City of Cibolo P.O.Box 826 Cibolo,Texas 78108 By: Espey Consultants,Inc. EC Project No.4030.500 3809 South 2nd St., Suite B-300 Austin,Texas 78704 FINAL—June 25,2008 T(512)326-5659 F(512)326-5723 www.espevconsultants.com 1110 City of CZbolo 9(� Impact Fee Study—Wastewater System Master Plan • Table of Contents 1.0 Introduction 1 1.1 Executive Summary 1 1.2 Abbreviations,Definitions, and Questions about this Document 1 1.3 Description of the Planning Area 2 2.0 Existing Wastewater System 4 2.1 Relationship to Other Entities 4 2.2 Wastewater Collection System 4 2.3 Existing Lift Stations 4 2.4 Determination of Existing Flows 4 2.5 Determination of Number of Living Unit Equivalencies 5 3.0 Existing System Hydraulic Analysis 5 3.1 Analysis Technique 5 3.1.1 Method of Analysis 5 3.1.2 System Model and Flow Allocation 5 3.1.3 Planning and Design Criteria 6 3.1.4 Computer Model Correlation 6 3.2 System Analysis 6 4.0 10-year Capital Improvements Plan 7 4.1 Future Land Use Assumptions 7 • 4.2 Capital Improvements 8 Table 1 Planning and Design Criteria 6 Table 2 Equivalencies 8 Figure 1 Planning Area 3 Appendix A: Existing System Map Appendix B: Future Land Use Assumptions Appendix C: Capital Improvements Summary Table • P•active14030.500 CIP Studylrpt\nallwastewatersystemplan080614.doc 1 FINAL—06/24/08 r c,d City oCibolo v A Impact Fee Study— Wastewater System Master Plan ,c.A, 1.0 Introduction 1.1 Executive Summary This report is provided in support of a Capital Improvement Plan, which is necessary to calculate the 2007 Wastewater Impact Fees. This plan has been developed to meet the projected wastewater needs for the next 10 years. All wastewater flows are derived from land use projections provided by the City of Cibolo. The capital improvements criteria for this evaluation generally apply to gravity lines over 8" diameters, force mains, and lift stations. No capital improvement costs are associated with the treatment plant. These fees are developed separately by Cibolo Creek Municipal Authority (CCMA) and will be passed on to all its customers. Cibolo assesses impact fees associated with necessary improvements to its collection system,which come in addition to CCMA's impact fees. The City's existing wastewater system was modeled to determine the existing level of service. There are currently 4,716 Living Unit Equivalents (LUEs) in the City's Wastewater Service Area. Future land use assumptions were established to guide future system improvement needs. There will be 27,078 LUEs in the City's Water Service Area by 2017. Nineteen Capital Improvement Projects totaling $21,353,048 are necessary to accommodate the 22,362 LUEs attributable to growth. Including eligible finance costs as allowed under Local Government Code (LGC) §395.012(b) and providing the alternative 50% credit described under LGC §395.014(7)(B), the impact fee is calculated to be $747.19 per wastewater service unit. 1.2 Abbreviations,Definitions,and Questions about this Document This document makes reference to numerous abbreviations which may not be familiar to all readers. The following guide clarifies many of these abbreviations. ADWF—Average Dry Weather Flow CCMA- Cibolo Creek Municipal Authority CCN—Certificate of Convenience and Necessity CIP—Capital Improvements Plan City—City of Cibolo Committee—Impact Fee Advisory Committee ETJ—Extraterritorial Jurisdiction fps—Feet per second(velocity) gpd—Gallons per day (volume rate) gpm—Gallons per minute(volume rate) GVSUD—Green Valley Special Utility District I/I—Inflow and Infiltration LGC—Local Government Code LUE—Living Unit Equivalent 11111 MG—Million gallons (volume) 1 FINAL—06/24/08 P•laclive14030.500 CIP Sludylrpllfrna(Iwaslewalersysremplan080624.doc r c.e City of Cibolo p . Impact Fee Study—Wastewater System Master Plan • MGD—Million gallons per day (volume rate) MH—Manhole PDWF—Peak Dry Weather Flow PF—Peaking Factor psi—Pounds per square inch (pressure) PVC—Polyvinylchloride material TCEQ—Texas Commission on Environmental Quality Any readers with specific questions may direct them to the City Manager at(210) 658-9900. 1.3 Description of the Planning Area For the purposes of this study, the planning area is defined by the City's Certificate of Convenience and Necessity (CCN). This is the city's wastewater service area. This area is defined by jurisdictional and geographic considerations, existing water service, and practical limitations of service. The planning area encompasses an area of 10,314 acres (16.1 square miles). The adjacent areas receive wastewater service from City of Schertz and Green Valley Special Utility District (GVSUD). Portions of the City's corporate limits and ETJ are served by GVSUD. Properties within the GVSUD service area are not subject to impact fees assessed • by the City of Cibolo. Figure 1 shows the location of the CCN and Planning Area. • P•lactive14030.500CIPStudylrptlfinallwasiewatersystemplan080624.doc FINAL-06/24/08 City of Cibolo 7) Impact Fee Study–Wastewater System Master Plan Figure 1 Planning Area t.t.„,,,„.,,,,,,„,,,,,--,.. .7,,,` 4r•_••_..-iF ;; -n;h;,, - aiz,,,,r.;:. - - _ -..�:�, r'ao:Y». - _,.... .,._- _' /r.r -��'... _i -- _ - -- -`w ': -- is"z^":--1'F_'�t.S�i«�."�..:-��, _ - {�-- �- _� �..}_:.G� ��•f•' —_tiYS_:Pt:..1�� _ __ _l+.�tJ... _ �'}.�a+-,tv.••' iue✓1'��. - _-•-_'�h-••.,�-•'moi'.`: -,.-,r.,� t ' ; •°'-�Y.r�- - J+a da . * ,s >r•-ri.y • r -_i•.17m$Vr..,7 -- g` •ir k i --",`"-'r, - ,'. ." -,� 1 7 - t�- C,,i - 2 .� `-v,.•`- r - 5,-t k - p�' w r `{ -s. -, -k .r L-, ` 4 .,k• .. i s .�N v':' -l >~,-r -t Uaaak, 0 CO -` ,4 ,,,r - —'”t '�'--i, .,..._ S..- --- Y'F{"-'E� g' 7 ',•_ •' ▪a e k.a_ �•Y E< t 6 [-,-- s w' +r�-.r rz ~."- _,k ` k eI�'t�y o f , 1;�:-r.` 's` _ 3 r r - t -n•- ;=-u t t _�y. t'- �kx ` >;f '4?'"r f' �, P• v- ,'-•: I -02[1:1ert� -p, - rig- a # 3� �' :;:i -kr t"�YA-i --- i i -'7_ ''t_a - T --- r -,,,,,..c),,.... 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In addition, this chapter provides an analysis of the total capacity, level of current usage, and commitments for usage of capacity of the existing capital improvements. 2.1 Relationship to Other Entities As indicated previously, the City of Cibolo does not provide treatment services for wastewater. This function is provided in an agreement with Cibolo Creek Municipal Authority (CCMA), which owns and operates the regional wastewater treatment facility. City of Cibolo wastewater flows to the CCMA treatment plant via two routes. One is the Loop 539 lift station, which is located inside the city limits and pumps the effluent to the CCMA regional plant. The other is through wastewater lines that generally flow west through the City of Schertz. Since the City does not operate the CCMA treatment plant, the wastewater infrastructure evaluated in this plan are the major collection lines and lift stations that transport all flows to the Loop 539 lift station. No capital improvements were considered for the portion of the network that flows through the City of Schertz, since this portion of the City is built-out. Also, the Capital Improvements Plan (CIP) does not include • any over-sizing to serve areas outside of the Planning Area. 2.2 Wastewater Collection System The existing collection system consists of 6"-24" diameter pipes. Most of these are PVC, however, some of the older pipes and service laterals are concrete or clay. Replacement of these lines is not an eligible impact fee expenditure, and will have to be replaced or repaired as a maintenance project. Appendix A is a map of the existing collection system. Although the system contains pipes less than 8" diameter, only those lines greater than 8" were evaluated. 2.3 Existing Lift Stations The City currently owns and operates two lift stations (Willowbridge and Cibolo Vista). Each station is sufficient to serve the existing area flowing into each, as they were sized to accommodate the developments that they serve. The Loop 539 lift station is owned and operated by CCMA. 2.4 Determination of Existing Flows Flows are not metered at any point in Cibolo's collection system. CCMA charges a treatment fee based upon water use data. It is not possible to evaluate winter averages to • determine wastewater flow, because the City of Cibolo's water service area is not coterminous with its wastewater service area (recall that portions of the City are served by P:lactivel4030.500CIPStudylrolfinallwastewatersystemplan080624.doc 4 FINAL—06/24/08 r c.� City of Cibolo 4 Impact Fee Study— Wastewater System Master Plan • Green Valley SUD). Therefore, the existing flow rate per living unit equivalency (LUE) must be estimated based on the water consumption rate per LUE. The Water System Impact Fee Study—Master Plan was prepared at the same time as this study, and derived 361 gallons per day per LUE. Based on an evaluation of seasonal water use patterns, the wastewater flow per LUE was determined by using 75% of the water demand rate per LUE (361 gallons per day), and is calculated to be 271 gallons per day per LUE: 361 gpd/LUE x 0.75 =271 gpd/LUE 2.5 Determination of Number of Living Unit Equivalencies Within the City of Cibolo's wastewater service area,there are 4,716 existing wastewater customers. Therefore,there are currently 4,716 LUEs within the City's service area. 3.0 Existing System Hydraulic Analysis In order to determine the improvements required to meet existing needs, a hydraulic analysis was performed. • 3.1 Analysis Technique 3.1.1 Method of Analysis A computer hydraulic model (InfoWorks) was developed to assess the capacity of the City's collection system. InfoWorks software is a GIS-based platform that incorporates standard engineering algorithms and enables time-series flow data to assess capacities and restrictions. 3.1.2 System Model and Flow Allocation The existing collection system was imported into the hydraulic modeling software. Pipelines with diameters smaller than 8" were not modeled. Existing wastewater flows were calculated according to the flow rate per LUE (see section 2.4), and allocated to different nodes in the system based on known flow patterns and land use. Platted lots were assumed to be occupied for the purposes of flow allocation, since they represent a commitment to current capacity. A free outfall at the Loop 539 lift station wet well was assumed.2 Nodes are points within the network,such as junctions or manholes. In some instances these nodes mark the point that flows are introduced into the network. 2 The free outfall assumption means that the wet well of the lift station is sufficiently sized such that the level in the • wet well never exceeds the incoming flowlines of the wastewater mains,creating a tailwater condition at the pipe outfall. P•Iactive14030.500 CIP Studylrptlfinallwastewaiersystemplan080614.doc Si FINAL—06/24/08 City of Cibolo Impact Fee Study—Wastewater System Master Plan 3.1.3 Planning and Design Criteria The design criteria utilized in the model were developed from state standards, known existing system characteristics, and generally accepted engineering principles. The criteria are summarized in the following table: Table 1 Planning and Design Criteria Criteria Value Person/LUE 2.8 Average Dry Weather Flow ADWF =70 gallons/person Peaking Factor(PF) PF= [18+.J0.0206xADWF] [4+.J0.0206xADWF] Peak Dry Weather Flow PDWF =ADWF x PF (PDWF) Inflow and Infiltration I/I 750 gallons/acre Peak Wet Weather Flow (PWWF) PWWF=(PDWF)+I/I • Gravity Pipe Capacity [85%of Pipe Flowing Full] .85 x PWWF Mannings n n=0.013 Gravity Pipe Velocity Min Velocity=2 fps Force Main Velocity Range Min Velocity=3 fps Max Velocity= 8 fps Living Unit Equivalent 1 LUE=271 gpd Manhole Spacing 1MH/300 feet 3.1.4 Computer Model Correlation The modeled system was not calibrated as flows have not been metered. 3.2 System Analysis The existing system was analyzed. Some areas of restriction were noticed in peak wet weather scenarios; however the impact was limited to surcharge in manholes and no overflows were indicated. Therefore,the existing system is adequate to serve the existing population. This is consistent with observations and reports by operation personnel and City staff. • P•lactive14030.500 C/P Studylrptlftnallwastewatersystemplan080614.doc 6 FINAL—06/24/08 City of Cibolo Impact Fee Study—Wastewater System Master Plan .t.., 4.0 10-year Capital Improvements Plan The purpose of this section is to provide a description of the capital improvements and their costs necessitated by and attributable to new development in the service area over the next ten years. This section also defines the specific quantity of wastewater flow for a service unit and provides an equivalency table establishing the ratio of a service unit to various types of land uses, including residential, commercial, and industrial. 4.1 Future Land Use Assumptions Future demands to the wastewater system are determined by future land use assumptions. These assumptions were defined in workshops with City Staff, the Impact Fee Advisory Committee, the Planning and Zoning Commission and the City Council. The intent of the workshop exercises was to evaluate the entire city's planning area (which extends beyond the wastewater service area) and determine the most likely, balanced and orderly land use pattern for the period 2007-2017. The anticipated growth pattern of the city, in terms of the location, use, and intensity of the use, is based upon the following considerations: • Average annual residential building permit growth of 14%for the period 2003-20073 • Average annual sales tax revenue growth of 31%for the period 2003-20074 • Population projections of the 2005 Master Plans • Trend of higher consumer expenditures per household closer to Cibolo's center, relative to greater distances from the city's center6 • Retail and commercial uses are anticipated along state highways and major intersections, in response to the population growth and anticipated demand for services. • The city's largest private employers have announced plans to expand their operations and hire additional workforce. • The availability of utilities and regional transportation infrastructure. • The location of floodplains,railroads and similar constraints. • The application of prudent land use planning principles, such as the transition of use intensity and the creation of a center of high activity. Residential and non-residential land use classifications are indicated as follows on the attached copy of the Future Land Use Assumptions Map (Appendix B). Residential uses indicate the future density in terms of dwelling units per acre or DUA. The land use classifications include: cluster residential (0-2 DUA), single-family residential (2-4.5 DUA), attached residential (6-12 DUA), mixed use (6-16 DUA), institutional, commercial, industrial, and park/open 3 Source: Building Inspections Department,City of Cibolo 4 Source: Allocation Historical Summary,Texas Comptroller of Public Accounts, http://ecpa.cpa.state.tx.us/allocation/AllocHistjsp 5 The adopted Master Plan presents several scenarios for growth. The city's population growth as estimated by Census and building permits,is currently following Scenario'C',which forecasts a population of 28,537 by 2015. This scenario represents an average annual growth rate of 24.9%. Source: Figure 2—Population Projections,City of Cibolo Master Plan,2004. 6 Source: SitesUSA,Census-based Demographic Profile prepared for City of Cibolo,September 2007,page 9. P•lactive14030.500 CIP Studylrptlfinallwastewatersystemplan080624.doc FINAL—06/24/08 City of Cibolo Impact Fee Study-Wastewater System Master Plan • space/preserve. Since the Future Land Use Assumptions serve as a policy document(the Future Land Use Plan), the map initially describes a build-out scenario. However, for the purposes of impact fee calculation, the Future Land Use Assumptions must reflect the estimated level of growth in the planning area within the statutory ten-year planning horizon.8 To this end, a probability overlay exercise was undertaken in which each planning subarea was assigned a "probability of development" value (between 0.0 and 1.0). These values act as a coefficient to provide a weighted estimate of future demand at the end of the planning horizon, thereby avoiding an overestimation of future flow and resultant facilities. Future land use equivalencies for service units follow: Table 2 Equivalencies Land Use Equivalency Table Land Use Classification LUE Conversion Single-Family/Cluster 1 Dwelling Unit=1 LUE Attached Residential 1 Dwelling Unit=0.7 LUE Commercial' 1 LUE/1660 sf floor area Industrial 1 LUE/4000 sf floor area Institutional' 2.5 LUE/acre Mixed Use' 50%Commercial/Retail/Office 30%Residential 20%Institutional/Public/Civic • Notes: 1) Commercial development assumes 20%available land area is building area 2) Institutional use ratio is consistent with other direct methods 3) Mixed use assumes ratio identified in Table 20,City of Cibolo Master Plan Flows are forecast for each area by assuming 271 gallons per day per LUE, consistent with the existing system flow rate assumption. The existing system serves 4,716 LUEs. The total number of projected LUEs in the City's service area by 2017 is 27,222. The total number of projected LUEs necessitated by and attributable to new development is 22,506. In order to serve these additional units, capital improvements are necessary. 4.2 Capital Improvements Improvement alternatives were placed into the hydraulic model to determine the minimum requirements to serve the projected demands for service. Wastewater lines serving future areas of development were sized and located in natural drainage ways and along alignments of future roadways shown in the City's Future Thoroughfare Plan. The table included as Appendix C describes the type of improvements required and associated costs as allowed under Local Government Code (LGC) §395.012, to meet the City of Cibolo's 'Cluster residential development is characterized by denser areas of development and larger areas of set-aside open space,resulting in a low,overall average density. Attached residential development is characterized by narrow lots Sand often zero side yard setbacks,such as townhomes,garden homes,patio homes,etc. 8 Texas Local Government Code§395.001(5) P•kactive19030.500 CIP Studylrpi final wastewatersysiemplan080629.doc FINAL-=06/24/08- r;,d City of Cl 0 0 nImpact Fee Study—Wastewater System Master Plan • anticipated growth until2017. It is anticipated that these projects will be implemented according to most immediate need, and will become part of the City's 5-year Capital Improvements Program(CIP) as prioritized by the CIP Committee and City Council. _ _ P•lactive14030.500CIPStudylrpt\Finallwastewalersystemplan080624.doc 9 FINAL=06/24/08- .' 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Y..A'Y' ,� z=E�.,-`•Z,r..lamr'.' ._ix`..L"� ;(" 1 i.`t - -- t ..f',-r'u _ Legend J� 1 tq J ,s,'.{ �i :,' , ',/c,�°c•F'.'y,:y'.'::,_.T:.LL {.r,-,`i'i. ��t.ae .'.\V,W14,A)/±WW34C:+�E.':> S�'L-'-•__.:[.--;;•°' _ �'�','.' <•".^,-"• '..:i.':�.'.::.:.:: 'zi.r_,:r>e,�� F O' WW MANHOLE FUTURE LAND USE - ^�;,•-�,.as^.�•� ♦�Y 1�' UFT STATION 0-2 DUA 1 CLUSTER ) 'aF'` a,:•%.'e-,',,-'-:;•-R i.,-:'xiY`�" :'P'.��.y t ��' SINGLE FAMILY 2d.5 DUA �:sSS,��'�:^�.��`,,,. 3{x:.1':T�::..'��);'`1.s`"".'`.fi'k� '•4}�� i - �EXISTING WASTEWATER UNE ( 1 a:,` t"�"' - `•.°`.-s Y�:i':,�>';v`�".` p� - ^: ATTACHED RESIDENTIAL . .-'•.F•r> �'�"Firy ��'7'L:._�;`J.,....� •.-,y �,,3-: i1-.�:ifK Tz. 'P .: ►, PROPOSED WW FORCE MAIN I (611 DUA) v � 1^}1.w4 "v•.- _-y .y 'FRgE._<:7.�1 'a _;�I: ■ra■ MIXED USE 6-16DUA PROPOSED W,NGRAVITY MAIN ® ( ) ::,'' _ f"..� � •' L J..�,,, -5;yg,,�'F ,t� ', e ®INSTITUTIONALUSE COMMERCIAL 7:7- ,��• _ �INDUSTRIA ¢-Y•i{�- �T' '`-fi _ PARK,OPEN SPACE,PRESERVE -- ----- --- - --1" ----- - -- _ EXHIBIT B Es_pey Consultants,Inc. FUTURE WASTEWATER SYSTEM MAP 0 1203 2,400 4,800 y"[ Environmental&Engineering Services AND FUTURE LAND USE ASSUMPTIONS CIP AND IMPACT FEE STUDY Feet SEPTEMBER 2007 CIBOLO,TEXAS PROJECT#4030.500 PW,wNmOSOpbP;Sq/G:S,�nNm660mq_Fu�uw_xW Srye,P�uy mE City of Cibolo Impact Fee Study— Wastewater System Master Plan • Appendix C Capital Improvements Summary Table • • - - C 06/24/08 P•Iactive14030.500 CIP Sludylrptlfinallwastewatersystemplan080624.dac FINAL 0 Impact Fee Study June 24,2008 City of Cibolo CITY OF CIBOLO Wastewater Capital Improvment Projects Length(LF) Engineering/ Finance Costs (or other specified ROW/Easement Surveying/ allowable under Project Number Location/Description Improvement Type quantity) Construction Cost Contingency Acquisition Permitting costs LGC§395 Total Costs WWI Town Creek Parallel Interceptor 30"Gravity Main 5,600 $911,400 $164,052 $23,140 $227,850 $749,440 $2,075,883 WW2 Town Creek West Parallel 30"Gravity Main 5,950 $968,363 $174,305 $24,587 $242,091 $796,280 $2,205,625 WW3 Town Creek West from Reata to GV Road 24"Gravity Main 3,500 $551,250 $99,225 $14,463 $137,813 $453,554 $1,256,304 WW4 Dean Road to Willowbridge 21"Gravity Main 4,500 $685,125 $123,323 $18,595 $171,281 $564,053 $1,562,377 W W5 Green Valley Road West 18"Gravity Main 2,400 $362,880 $65,318 $9,917 $90,720 $298,792 $827,628 WW6 Green Valley Road East 18"Gravity Main 1,100 $161,700 $29,106 $4,545 $40,425 $133,214 $368,990 WW7 Town Creek East Fork(Weidner to GV) 15"Gravity Main 4,850 5724,590 $130,426 $20,041 $181,148 $596,756 $1,652,961 WW8 North Side FM 78 30"Gravity Main 3,600 5585,900 $105,462 $14,876 $146,475 $481,783 $1,334,496 WW9 Country Lane Force Main 6"Force Main 4,800 $378,000 $68,040 $19,835 $94,500 $316,612 $876,986 W W IO East System Lift Station(Country Ln at Tolle Rd) Lift Station 1.14 MGD $672,000 $120,960 $9,000 $168,000 $548,027 $1,517,987 WWII East System Gravity Main 21"Gravity Main 7,600 $1,157,100 $208,278 $31,405 $289,275 $952,623 $2,638,681 W W I2 Aqua Vista Force Main re-route 15"Gravity Main 600 $89,640 $16,135 $2,479 $22,410 $73,825 $204,490 W W l3 Southwest System Main(Schaffer Rd.to Lower Seguin Rd.) 21"Gravity Main 10,500 $1,598,625 $287,753 $43,388 $399,656 $1,316,124 $3,645,546 W W 14A Lift Station at Lower Seguin Rd and Cibolo Creek Lift Station 1.4 MGD/2.4 MGD $787,500 $141,750 $9,000 $196,875 $641,346 $1,776,471 W W 14B Force Main parallel to Southwest System Main 8"Force Main 12,500 $1,181,250 $212,625 $25,826 $295,313 $968,983 $2,683,997 WW15 Bison Ridge Lift Station improvements(CoC Portion) Wet well and pumps Additional 0.5 MGD $288,750 $51,975 $4,500 $72,188 $235,838 $653,251 W W I5A Schaffer Rd.East 8"Gravity Main 1,320 $193,600 $34,848 $5,455 $48,400 $159,501 $441,803 W W I5B Hackerville East 15"Gravity Main 1,800 $268,920 $48,406 $7,438 $67,230 $221,476 $613,470 III W W 15C Acizpe Rd.East 15"Gravity Main 1,680 $250,992 545,179 $6,942 $62,746 $206.711 $572,572 W W 15D Lower Seguin East I5"Gravity Main 2,040 $304,776 $54,860 $8,430 $76,194 $251,007 $695,266 W W l6 Town Creek Fork East(Rustic Tr.) 8"Gravity Main 3,600 5504,000 590,720 $14,876 $126,000 $415,612 $1,151,208 W W 17 East GravityMain Eastern Extension near Pierson Ln 8"Gravity Main 3,840 5537,600 $96,768 $15,868 $134,400 $443,319 $1,227,955 W W I8 Country Lane Gravity Line 8"Gravity Main 2,880 $403,200 $72,576 $11,901 $100,800 $332,489 $920,966 W W I9 South Side FM 78 across Hackerville to Arizpe Rd. 15-24"Gravity Main 7,000 $1,102,500 $198,450 $28,926 $275,625 $907,108 $2,512,608 Total Cost $33,417,521 Total LUEs 27,078 Existing LUES in wastewater service area 4,716 Total LUES attributable to growth 22,362 Initial Impact Fee Calculation $1,494 50%Credit $747.19 Wastewater Impact Fee $747.19 Espey Consultants,Inc. P3ae500\4030.500 CIP StudytSpreedsheetslClP_Projects080a23xIslWustewater 110 .f Drainage Capital Improvement Plan * §x`41 4;d1 . . <0 4, CITY OF CIBOLO s;•, Impact Fee Study �^A ;-,:,;(.:,,-4* • :sot U r. . Cep 4--) r—i r, II .. cn o . • .,...•..„..._.- -„,.,:t... •4,....... _ ..,......_ \ 7.7._. ....... .. , r.._ . vs,„„... Iv F..,:iii ..Lw.:.,.4rs ' �'�. ,Y + -;.:'/ - City of Cibolo �0- o F c, 11, iit 43f`'$' ' K . a }ili.,.nt,.at�`,ii4sY330,1 9. FINAL—June 24,2008 .+ '' �r•; -s oll.o. Project No.4030.500 - ,..4;,:--4•STi.,ni- S �� r0 —� s ..f.m.,..rvir.:,„:.,,_ ry : .....,....,•,..„. 4:...,..,:,._.4.te..,..p,4:„. fc ., �[*�:4 1 11y}}Y • CITY OF CIBOLO—IMPACT FEE STUDY Drainage Plan 0 Prepared for: City of Cibolo P.O.Box 826 Cibolo,Texas 78108 By: Espey Consultants,Inc. EC Project No.4030.500 3809 South 2nd St., Suite B-300 Austin,Texas 78704 FINAL—June 24,2008 T(512)326-5659 F(512)326-5723 www.espevconsultants.com 0 City of Cibolo • Impact Fee Study—Drainage Plan Table of Contents 1.0 Introduction 1 2.0 Existing Town Creek Drainage System 2 2.1 Methodology 2 2.2 Impervious Cover 2 2.3 Living Unit Equivalency 2 3.0 10-year Capital Improvements Plan 3 3.1 Future Land Use Assumptions 3 3.2 Capital Improvements 5 Table 1 Land Use Equivalency Table 5 Figure 1: Town Creek Watershed 1 Figure 2: Derivation of typical impervious cover,R-2B District 3 • • _ __ _ ---- - --- --- P•Iactive14030.500 CIP Studylrptlfinalldrainageplan080624.doc l FINAL—06/24/08 City of Cibolo IIIImpact Fee Study—Drainage Plan 1.0 Introduction 1.1 Executive Summary The 2007 Drainage Capital Improvements Plan for the City of Cibolo has been developed so that the drainage capacity for the municipality can be met for the next 10 years. The plan was developed by Espey Consultants, Inc. with guidance from City Staff and the Impact Fee Advisory Committee appointed by City Council. The plan should be reviewed and updated on an annual basis, in connection with updates to the City Master Plan or other planning documents, or as needed to reflect changing conditions. The City's existing drainage system was modeled to determine the existing level of service. This study area includes only the Town Creek watershed. There are currently 11,055 Living Unit Equivalents (LUEs) in the Town Creek watershed. Future land use assumptions were established to guide future system improvement needs. There will be 19,770 LUEs in the City's Town Creek Drainage Service Area by 2017. Seven Capital Improvement Projects totaling $20,904,875 are necessary to accommodate the 19,770 LUEs. Existing and future LUEs will benefit from the improvements and therefore the cost is distributed across all LUEs. Including eligible finance costs as allowed under Local Government Code (LGC) §395.012(b) and the alternative 50% credit described under LGC §395.014(7)(B), the impact fee per drainage service unit is calculated to be: $528.70. III1.2 Description of the Planning Area Figure 1 Town Creek Watershed - -_ _ t For the purposes of this study, the 77 _ _ 7'`:',:" planning area is defined by the Town 'j'''" I Creek watershed. For the purposes of the Corral 35 'r ' -`;. f drainage impact fee, the planning area is Guadalupe ',''-::1- • conn the service area, i.e. the area in which fees - are assessed and the CIP is implemented. Bracken \ The previous impact fee study established �"" � STUDY AREA separate zones within the Town Creek T �� —` watershed, this update does not establish 4 r be,`- 78 separate zones and all portions of the 4r. ip , ""� watershed pay the same fee. The Dietz�� al Clry a .A•r'i Creek drainage system, serving the western portion of the City, has been built 1.,,* , "'• ' to its capacity. Figure 1 shows the Town Creek watershed. y{ .10, A n a/a Creek p 1 2 MOICI ID Miles Q•lactive14030.500 CIP Studylrptlfrnalldrainageplan080624.doc 1 FINAL- 06/24/08 City of Cibolo Impact Fee Study—Drainage Plan • 2.0 Existing Town Creek Drainage System The purpose of this chapter is to provide a description of the existing capital improvements within the service area and the costs to upgrade, update, improve, expand, or replace the improvements to meet existing needs and usage and stricter safety, efficiency, environmental or regulatory standards. In addition, this chapter provides an analysis of the total capacity, level of current usage, and commitments for usage of capacity of the existing capital improvements. 2.1 Methodology In order to determine the capacity of the existing Town Creek drainage system, a hydrologic and hydraulic analysis was performed. Details of the analysis and methodology are found in the report"City of Cibolo Flood Protection Plan: A Master Plan for Managing Town Creek (September 1,2007, Espey Consultants, Inc.)". The results of this study indicate that improvements are necessary to provide a 25-year level of flood protection in several existing problem areas. Consequently, improvements are also necessary in some areas to provide a 100-year level of protection. This study determined that in some areas, a 100-year level of protection was not cost justified, based upon estimated costs to construct the improvements relative to the benefits in terms of flood damage prevented. In these areas, however, a 25-year level of protection was still possible and cost- justified. Therefore, the highest level of protection (minimum 25-year or 100-year where possible) that can reasonably be achieved is the criterion for which improvements have been considered. 2.2 Impervious Cover Hard surfaces which do not permit the absorption of rainfall into the soil, thus resulting in increased stormwater runoff, are known as impervious cover. Impervious cover is the basic, quantifiable and common unit that creates the need for drainage improvements. There are currently 38,273,461 square feet of impervious cover in the Town Creek watershed. This number was developed through a spectral analysis of color-infrared aerial imagery. The analysis technique differentiates between pervious and impervious surfaces based upon the spectral signature of impervious surfaces. This information was developed and managed spatially in ESRI ArcGIS 9.2 software, in addition to the Town Creek watershed boundary developed previously for the City of Cibolo. 2.3 Living Unit Equivalency To determine the amount of impervious cover attributable to a living unit equivalency, a • typical R-2B zoned lot was evaluated providing a calculated value of 3,762 sf of impervious cover per lot. This includes impervious surfaces that are placed on the lot, as well as some P•lactrve14030.500 CIP Studylrp4/inalldrarnageplan080624.doc 2 FINAL - 06/24/08 City of Cibolo Impact Fee Study—Drainage Plan • that are within the right-of-way but attributable to the unit, such as the driveway apron, curb and pavement measured to the road centerline for the width of the property. Therefore, one living unit equivalent is defined as 3,762 square feet of impervious cover (see Figure 2, below). Figure 2: Derivation of typical impervious cover,R-2B District .�, _... ,:t`;"'� -r:;,.- '%:r?,g�,�rc,r'�.' 7,;: :..7 " ger;.. ..-i':�,ti. _ - ...f._,, n,•?:,t. � '3 .�.�:.*�,;��7-; v,'aRT,;.^,•.rte ,4,' �j :.o';. rh' �,.+.,# ,�+y'.(•°.�-.-� t��t "�vY- ;ii�w r �:%d<� ��rf+,y.�h��'1�'�' . 4"'a,p -�:- : �_.__4...zr Vii, 1F` • ,1-,—, .�.�:..,. °._ i- -,-;11,-..,, -4 ,,,___'.-" , I K; ;i - Tc Via,. ^rr!';r5^-x� '` �-f .r - V. e n �r� - -as`3' ,A,�.r .i,�- .,r-'' t '''''.14.S: :';'-'11,a,._ , L7!T' ®r.� E �fi` :0, }1 f.S 1 F•M at It ...� o 7 , 3 462 .5 ¢'?', �. a, , ' �Ty _1'4 t.,:-.;.,,,,:,.,._,.; ?> 426 .'. �''so 7 03`C •-o OS = 70S 1 y ak,}°.�t tS :7 i*,1 5- :k.t ;iZ � 6Sgoo o '04, ' a>go., •�a,{ 9vd�F ,fit tea, ". -; "Pr'I. -ru,r '''', ;•':•t ;;� h-� } i.- .'t, {.b - 'oag7-', Fo/ Po/ • r °O/ 'itt oo/ pit. : a_�v` •' ,:..." 'i � �'"�`^•s � -yamy- - :.'',b,,,1 ,,,,i'','' -�� s, `�vo/ t � �• �x�}c' .� �lgr _ t!�� Til � z�''fidi'lf ,},l p 9 i i{ ! b�.'k.,'S .. 5'p J 'W,, ,, df. J S .. 3 :. i e. 1' .Y•:Sky. '"+� Kf',.Y V -?s 4,. L 0 l E# {.•x:», „ 'b. .., ') F..- '�.14 ::••4, ,1,:,,4,-11IC Average 3,7E2 Square Feet F " ta`! K i P' . 1: ! ss i t 10'.";4':=1.:--24--g, F� " P`.,J}, 4 4 '4 ; .5e sF., ,4c f 4,1 e ,, ::.- '.:t.4.. '" �,h ,,;,. . „ .. ,..,. .,. a 3'. /os �» / -:. !'t...s, !T'ics'; i a ` o t NIA. 9.32ss; /c`.7,a” „to...? 'o...? ' 4-7e) 11,414 - �.. it," kl hZt ! „�i, V? Avr s ,4M4 fi' a'Q;eo,: `90,,'I. 7%,,,,s•wrr Foo/ k'q. Poor ' h•� 4 71 •l r �t ''s a.•.�§ y.N s a t r , i -.4` �/ 1pbc1 .- t 4*.:,,-'..- 4 my r '- ,' E 7 P a, 1 ,. 6.---,,i + •h- ��r.%...,,, , e � t }},4, 1-- 7 �^�a''4' • # a s t • S . ',:- '''"-:''''4- ,"- c2 -taut -e 4„z u - sf r`t j - e ,� "',.m' . a £ 1..„._,,,,....„:„, „:„......,,,,,,,.,,,,..1.,„.„.,,., ,. n. . f«.r.- xt.. rte_ ,. 1,,,,,,I,:-.4,,,!•;'.. -41. z z fii }.°L."-.s`Y k -, 1 Z •4- P .:Sf -- G` - Y�"n .a'&. y< •� d�w'w•ra, ` .., , ,,:.,i:. i {i •41,a•„**-414 "iiiV,.-4 al.2 ii. .4 .;-A'.. ,;il 0 ,4-, , t, .,----j,,r ''',11.‘f.'-. , ':-, -' , ',. ' , ''' V ''-'..-; , ,,,:itvi..sf, . i.*1-:,13p.IE is.,4,.t..' ," "..:-: ,,,,,,..:,..: , . ,, k.,,k---.. -,.... ,,,,.-,''' -. '-'rv,=.; t.-is... - ir __ ,.;... .:,. ,,,,,.. ,.!,,,,,,_,, ,,,,,,, .., , .,..: ,v„,.,,, g, .,..,,i ---: AVe .e,,,,, -41., sr;w.tv,ii...44 Ar:,t, .e- .,,,?-,,,. .-- ,, Based on this calculation,there are 11,055 existing LUEs in the service area. 3.0 10-year Capital Improvements Plan The purpose of this section is to provide a description of the capital improvements and their costs necessitated by and attributable to new development in the service area over the next ten years. This section also defines the specific quantity of impervious cover for a service unit and provides an equivalency table establishing the ratio of a service unit to various types of land uses, including residential, commercial, and industrial. 3.1 Future Land Use Assumptions Future discharges to the Town Creek system are determined by future land use assumptions. These assumptions were defined in workshops with City Staff, the Impact Fee Advisory Committee, the Planning and Zoning Commission and the City Council. The intent of the workshop exercises was to evaluate the entire city's planning area (which extends beyond the 11111 water service area) and determine the most likely, balanced and orderly land use pattern for the P:Iactive14030.500 CIP Studylrptlfinalldrainagep1an080624.doc 3 FINAL - 06/24/08 City of Cibolo Impact Fee Study—Drainage Plan • period 2007-2017. The anticipated growth pattern of the city, in terms of the location, use, and intensity of the use, is based upon the following considerations: • Average annual residential building permit growth of 14%for the period 2003-20071 • Average annual sales tax revenue growth of 31%for the period 2003-20072 • Population projections of the 2005 Master Plan3 • Trend of higher consumer expenditures per household closer to Cibolo's center, relative to greater distances from the city's center4 • Retail and commercial uses are anticipated along state highways and major intersections, in response to the population growth and anticipated demand for services. • The city's largest private employers have announced plans to expand their operations and hire additional workforce. • The availability of utilities and regional transportation infrastructure. • The location of floodplains, railroads and similar constraints. • The application of prudent land use planning principles, such as the transition of use intensity and the creation of a center of high activity. Residential and non-residential land use classifications are indicated as follows on the attached copy of the Future Land Use Assumptions Map (Appendix B). Residential uses indicate the future density in terms of dwelling units per acre or DUA. The land use classifications include: cluster residential (0-2 DUA), single-family residential (2-4.5 DUA), attached residential (6-12 DUA), mixed use (6-16 DUA), institutional, commercial, industrial, and park/open • space/preserve.5 Since the Future Land Use Assumptions serve as a policy document(the Future Land Use Plan), the map initially describes a build-out scenario. However, for the purposes of impact fee calculation, the Future Land Use Assumptions must reflect the estimated level of growth in the planning area within the statutory ten-year planning horizon.6 To this end, a probability overlay exercise was undertaken in which each planning subarea was assigned a "probability of development" value (between 0.0 and 1.0). These values act as a coefficient to provide a weighted estimate of future demand at the end of the planning horizon, thereby avoiding an overestimation of future storm discharges. Future land use equivalencies for service units follow Table 1. The impervious cover percentages assumed are consistent with current zoning. Source: Building Inspections Department,City of Cibolo 2 Source: Allocation Historical Summary,Texas Comptroller of Public Accounts, http://ecpa.cpa.state.tx.us/allocation/AllocHist.jsp 3 The adopted Master Plan presents several scenarios for growth. The city's population growth as estimated by Census and building permits,is currently following Scenario'C',which forecasts a population of 28,537 by 2015. This scenario represents an average annual growth rate of 24.9%. Source: Figure 2—Population Projections,City of Cibolo Master Plan,2004. 4 Source: SitesUSA,Census-based Demographic Profile prepared for City of Cibolo,September 2007,page 9. 5 Cluster residential development is characterized by denser areas of development and larger areas of set-aside open space,resulting in a low,overall average density. Attached residential development is characterized by narrow lots • and often zero side yard setbacks,such as townhomes,garden homes,patio homes,etc. 6 Texas Local Government Code§395.001(5) P•lactive14030.500 CIP Studytrptlfrnalldrainageplan080624.doc l `� FINAL- 06/24/08 City of Cibolo Impact Fee Study—Drainage Plan • Table 1 Land Use Equivalency Table Land Use Equivalency Table Land Use Classification LUE Conversion Single Family/Cluster 1 Dwelling Unit= 1 LUE =3,462 sf impervious cover Attached Residential (60%of land area)-3,462 sf=Number of LUEs Commercial (75%of land area)±3,462 sf=Number of LUEs Industrial (40%of land area)-3,462 sf=Number of LUEs Institutional (20%of land area)±3,462 sf=Number of LUEs Mixed Use (75%of land area)±3,462 sf=Number of LUEs Impervious cover is projected for each area by assuming 3,762 square feet per LUE. The existing drainage system serves 11,055 LUEs. The total number of projected LUEs necessitated by and attributable to new development is 19,770. In order to serve these additional units, capital improvements are necessary. 3.2 Capital Improvements Improvement alternatives were identified by placing the impervious cover assumptions into the hydrologic model,then using the hydraulic model to size the improvements. • The table included as Appendix B describes the type of improvements required and associated costs as allowed under Local Government Code (LGC) §395.012, to meet the City of Cibolo's anticipated growth until 2017. The corresponding project locations are identified on the Appendix A map. It is anticipated that these projects will be implemented according to most immediate need, and will become part of the City's 5-year Capital Improvements Program (CIP) as prioritized by the CIP Committee and City Council. • 5 P•lactive14030.500 CIP Studylrplfnalldranageplan080624.doc City of Cibolo Impact Fee Study—Drainage Plan • Appendix A Future Land Use Assumptions S S A P:lactive14030.500 CIP Studylrptlfinalldrainageplan080624.doc FINAL—06/24/08 .--,,,,,•-,',,i,e 44.---V-ki:-V,...:1;.'•-•.:,.., .,7'..,'-z•-•-•-`r.-----7,Vt-6'..'±-3',--- ,..,....: -..: •,-...,47-,,,,i,,l;Anl,a,oph..,A,,,i , - ......-,,,,,,,,,r.zsliii"" 7.:7- -i.:;•......4"..,...,.,,.4...09,g,..±...,',,,,, .:.,..,,.. r, e.r..;.5,V;::....:.:','cs.:f.7Tki,W1-,.;.Z‘•47...',..tW.,,g.F;,.."•,.,:f,-7,-'•••'21'..! ,,, „...,,,4• •Ikli4 ':::. t.-l•-•••?-91'' --;•1 i.'''F:fxr.,.'6.:•;4":44!:' ' , .??A*..4. ,•.14,-;2P.4-4ill' '`,-' , 'zigt.,V,Y, Legend e,:,•''. .,.!`-' ,ig; r.t-k•-.,,. •.:•.;-,,,.-• ...v.•....,-0.44,4-:-'s,Arr.:''.r-,.'A"-, '•','W:ix-•*'=-U---z;',- -,•`,,,,---:',1 %.•.0', , •,•0• ... i•w•-•• 4..i.••=,..r,,..-.-:„.,•.71,,,,-,--•-...,-,- -.•• .-2,-,....-A-..;,...,,,,,1-4•TA••':,•; ,..„•-•,e:".-A.•:,•:,.:;,•.„•41,..14,. ..•,,,,w.,,,,c,,,-K-,•,-, -,..-5,,,_•,;.,.....j, „ • •*, .,„..„.,,r•&•• ....,,,,,,,.-:,„.",,,,,-.1-•:-;5..,•-.-F.'f:::-"r ”4,14,'-.7,,,,,--;;,'-'4k,.., ,,.....,..L4'i .tv.-.A Pt..%f..,1.5'.!..•.',I4'.*,?'f.',,,.,•,:c-,..sitir*...hit.%.!...'":"Mi.---k.,-;;,1,:;::::!..ti.;4./ .:10.;4.'f.::;;:r. .,iAFA*--7," TOWN CREEK WATERSHED tp,.:,,:,-..;_,,,„7?„•:,,,t.,,... ,„_,-,,-;:,,,,K=4,(54„...... ,..zt-,,,AiArAiL,,,,,z:.Nz.,:::,:A,,.,..-_,:,..,.,4..;:,,,If,,,,,,,,,.,_:,--,,,,;,....,-,:-„,,g,,..7.;01,A, = .....„„, * -r.,,. 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',-, - - '.4d.,..,_'-fi-,?s,scii,ii,- 4.i- -,-,1• -,,,i;;----4-;-.4,1,,- --.N,--4,,,,,,ar----%,.i.....1,17..-.;,,. ...,y, -a...--.--,:;.17,. .• ,-,atv3- ,,,,....,-, —--,--,zr,, r1:,ii ''-:--:',.:-_,,. -15•Vitr9".€ec141.-,---- --V,„...-f-:--:---,,i;i:t?.•-kg.t.?=°)t-.1.,-,---..:.-•------i--,, -. -"3, - - EXHIBIT A .-v. /41-”' -6 ---- 84,000 I , Espey Consultants,Inc. ,000 0 2,000 11 0 F U TAUNRDE F Du RI_c Ai up I RNAEAN GDL AENNSPDAY CSUTTSFEEEMEASSUMPTIONSsl MT uPDRy0VEMEN T S Feet PROJECT e4 030.50 0 2: Environmenial 5,Eng,ineering Services CISOLO, TEXAS OCTOBER 2007 City of Cibolo Impact Fee Study—Drainage Plan • Appendix B Capital Improvements • S P:lactive14030.500 CIP Studylrptlfinalldrainageplan080624.doc B FINAL—06/24/08 • Impact Fee Study June 24,2008 City of Cibolo CITY OF CIBOLO Drainage Capital impeevmenl Projects Engineering/ Finance Coat, Construction ROW/Easement Surveying/ allowable under Project Number Location Improvement Type Ceti Contingency Acquisition Permitting mels LGC§395 Total Costs Notes DI Tows Creek East l Channel Improvements $1,858,736 5100,000 550,000 $193,000 51,139,839 $3,341,575 D2 Town Creek East Phase II Levee and other grading 5250.000 045,000 512,000 564500 5208,768 5578,268 1)3 Town Creek West Phase I Channel Improvements $2,220,991 S399,778 SO 5555,248 51,794,450 $4,970,467 134 Town Creek West Phase ll Upper reach $750,000 5135,000 543,044 $187,500 $630,282 $1,745,826 135 Town Center Online Regional Detention Detention facility $2,161,141 $389,005 5937,500 5540,285 $2,275,781 56,303,713 D6 Tolle Road Regional Detention Detention facility $734,788 $132,262 $937,500 $183,697 $1,123,359 $3,111,606 D7 Downstream Conveyance Land Acquisition SO $0 $509,642 535,675 0308,104 $853,421 Total Cost $20,904,875 Total LUES 19,770 Existing LUES in Drainage Service Area 11,055 Total LUES attributable to growth 8,715 Initial Impact Fee Calculation,based on benefit to existing and(ohne LUES SI,057.40 50%Credit 5528.70 Drainage looped Fee 0528.70 • Espey Consultants,The PA,avewoa.SW CIP SIWytSpreedoneeta/CtP Prnleetaa80023a1s10ra6uye 11110