ORDER NO. 30262 FEASIBILITY ANALYSIS FOR REGIONAL WATER AND WASTEWATER SERVICES FOR CENTER POINT AND EASTERN KERR COUNTY Came to be heard this the 14th day of May, 2007, with a motion made by Commissioner Williams, seconded by Commissioner Letz. The Court unanimously approved by vote of 4-0-0 to: Authorize inclusion of the Feasibility Analysis for Regional Water and Wastewater Services for Center Point and Eastern Kerr County in application to Texas Water Development Board for grant funding consideration under the Economically Disadvantaged Area Program, or other grant programs; and to other agencies as may be appropriate. .~da~ a ~, 5 COMMISSIONERS' COURT AGENDA REQUEST PLEASE FURNISH ONE ORIGINAL AND NINE COPIES OF THIS REQUEST AND DOCUMENTS TO BE REVIEWED BY THE COURT. MADE BY: Commissioner Williams MEETING DATE: May 14, 2009 OFFICE: Precinct 2 TIME PREFERRED: 9:30 a.m. SUBJECT: (Please be specific). Consider, discuss and take appropriate action to authorize inclusion of the Feasibility Analysis for Regional Water and Wastewater Services for Center Point and Eastern Kerr County in application to Texas Water Development Board for grant funding consideration under the Economically Disadvantaged Area Program, or other grant programs; and to other agencies as may be appropriate. EXECUTIVE SESSION REQUESTED: NAME OF PERSON(S) ADDRESSING THE COURT: Commissioners Williams, AI Groves, Tetra Tech, Bob Henderson, RBC. ESTIMATED LENGTH OF PRESENTATION: 30 minutes IF PERSONNEL MATTER-NAME OF EMPLOYEE: Time for submitting this request for Court to assure that the matter is posted in accordance with Title 5, Chapter 551 and 552, Government Code, is as follows: Meeting scheduled for Mondays: 5:00 P.M. previous Tuesday THIS REQUEST RECEIVED BY: THIS REQUEST RECEIVED All Agenda Requests will be screened by the County Judge's Office to determine if adequate information has been prepazed for the Court's formal consideration and action at time of Court meetings. Your cooperation is appreciated and contributes towazd your request being addressed at the eazliest opportunity. See Agenda Request Rule adopted by Commissioners Court. TETRA TECH, INC. 501 SOLEDAD ° SAN ANTONIO, TX 78205 TEL 210.226.2922 Ss g,,^y ~`~.: ~$~~Yy~b-Bg~j ¢!y1..,l,n'a, t w ~~'(''~q~~d~,z~~p~y~e~q. 3,r ° ~ ~~ ~,.7 R~Ly.J[r6"~~'^°'q~ ~i.~e i~~t'y~ 4 C®' E`i•, t'~t f as Y..t'" ~3!'4.'~ i"u}}t;:r 4 ;ytl~~Ygg t :.~..L':. ~g.. 9~~~ ~~ i l...qq~~~..~,,irr` q, 'a,.. Y~~wd ~awll E"~~e~~'V ,_.~ ,~i G~°~L.,/ ~'::,~~tt ' y... $;. ;`d ;Et `. CM ii ~..+<....~\.~~'elB~i <. ~N L_'. f"Ra.T 0 Submitted to: THE TEXAS WATER DEVELOPMENT BOARD MAY 1 !, 2n07 ° - PROPOSED KERR COUNTY REGIONAL - WATER & WASTEWATER PROJECT for CENTER POINT & EASTERN KERR COUNTY - SERVICE AREA - Prepared for KERR COUNTY and - UPPER GUADALUPE RIVER AUTHORITY - This study was prepared with the assistance of a Texas Water Development - Board Planning Grant TABLE OF CONTENTS Wastewater SECTION I Wastewater Cost Estimates SECTION II Water SECTION III Water Cost Estimates SECTION IV Public Input SECTION V Exhibits SECTION VI Feasibility Analysis Tor Center Point, Texas Regional Wastewater Collecfion System and Regional Water Supply and Distribution The Center Point area presently depends upon septic tank systems for wastewater disposal and as such is experiencing significant environmental and health problems along with a detrimental atmosphere for development of the area. This feasibility study is to determine the cost and potential benefit of providing a wastewater collection system with treatment being provided by either the Comfort Wastewater Treatment Plant or by the Kerrville Wastewater Treatment Plant. I. Wastewater Services A. Collection System The collection system, shown on the preliminary plan Exhibit A, would provide ,_ service to the existing developed area of Center Point. At the present time, the on- si[e treatment of septic tanks does not provide acceptable protection for ground water and has had unacceptable impacts on the streams and the Guadalupe River. It is proposed to create legislation requiring all properties within the Region within 300 feet of a sewer line must be connected to '- the system. There are a number of developments that '- have been created in recent years between Center Point and Comfort that can be served by the interceptor to Comfort. B. Transmission Lines Alternative "A" Treatment by City of Kerrville. This _ alternative, shown on Exhibit B, requires a lift station with a pump capacity of 715gpm and a total head of 120-feet. This lifr station would tie to a force main of 3- "' inches in diameter and a total length of 25,000-feet to tie to an existing manhole on the Kerrville system in the vicinity of the Kemille-Kerr County Airport. The main advantage to this transmission line alternative is the initial cost estimated to be $2.6 million. The major disadvantage to this line is, as a force main, it could not serve any of the ` area between Center Point and Kerrville City Limits; however, there is a portion of this area that could still be served with a gravity flow line back to Center Point, thus partially reducing the Regional Service Area capabilities. The cost of operation of the lift station would be greater than Alternative "B" due to the increased head required. Alternative "B° This alternative, shown on Exhibit C, also requires a lift station with the same capacity as Alternative "A", 715gpm; but with a lower head of 60 ft. This lifr station would tie into a force main of approximately 7,000 fr. where it would discharge into a gravity sewer line that would be constructed all the way to Comfort for delivery to their wastewater system, approximately 48,000 ft. This line is "- estimated to have a total cost of $4.4 million for the force main and the gravity line. The main advantage to this alternative is that it would truly provide regional service by serving all of the area along Hwy 27, between Center Poin[ and Comfort, and it would have less operating cost for the lift station. The disadvantage is the initial construction cost. C Treatment Comparisons: Treatment by Comfort Although no final commitments have been made, Comfort has indicated a _ willingness to consider: 1. Share the impact fee of $500.00 with the regional system. This share would also apply to all future connections tying into the line outside of the Comfort ` Service Area. 2. Comfort has also expressed a willingness to adjust their monthly charges to reflect not having to service these connections. °~ 3. Comfort will establish a rate per thousand gallons and will set a monthly charge based on water usage during December, January and February. This makes it easy to bill customers and does not charge customers for incidental infiltration flows. Treatment by Kerrville Kerrville's impact fee $500.00, is the same as Comfort's. Kerrville will not negotiate "~ this fee. Erom initial conversations with Kerrville, a rate of 1.Sx the current in-city rate will be established for each 1,000 gallons passing the meter. This process could be difticult to handle for billing purposes iii Center Point and may wind up paying for any infiltration in the system. D. Expansion On the assumption of using the Comfort connection as the preferred plan, because of its regional service characteristics, with a 12-inch gravity line running from Center Point to Comfort, the future expansion capacity would be as follows: Estimated number of connections for 12-inch pipe at minimum slope 0.20% 4 persons per connection 100 gallons per day per person with a 2.5 peak factor 12-inch capacity (~ 020%= 715 GPM - 1,029,600 UPD 1,029,600 GPD/4X100X'.5 = 1030 connections There are approximately 450 existing connections to be served within Center Point proper. The lift station and gravity line to Comfort is being designed to _. accommodate 1,000,000 gallons per day, or approximately 1030 connections. Center Point is estimated to grow by 3% per year or to 835 connections in 25 years. The area between Center Point and Comfort presently contains approximately 250 possible connections, and if it grows at 3% per year it would have 460 conmections in 25 years. If both areas grow at this projected rate, the systems capacity would be reached in less than 25 years; however if the area experiences that growth, it is probable that treatment facilities would need to be developed for the region rather than continuing with the arrangement for Comfort to treat the flow. _ PRELIMINARY ESTIMATED QUANTITIES & PROBABLE COST REGIONAL SANITARY SEWER COLLEC TION SYST EM Quantity Unit Unit Price Extension Mobilization 1 LS $200,000 $ 200,000 Right-of-Way Prep 1 LS 100,000 100,000 _ 6" Sanitary Sewer Pipe (All Depths) 9,600 LF 35 336,000 8" Sanitary Sewer Pipe (All Depths) 27,400 LF 40 1,096,000 12" Sanitary Sewer Pipe (All Depths) 8,000 LF 50 400,000 Sanitary Sewer Manholes (All Depths) 120 EA 4,500 540,000 _ Manhole Ring Encasement 120 EA 300 36,000 Siphons 800 LF 600 480,000 Siphon Structures 4 EA 30,000 120,000 Service Laterals to Property Line 500 EA 800 400,000 Service Laterals to Property Line to Dwelling 500 EA 1,800 900,000 Septic Tank Mitigation 500 EA 750 375,000 Cut & Patch Asphalt 5,000 SY 30 150,000 Bore, Jack Or Tunnel 300 LF 700 210,000 Dewatering 1 LS 20,000 20,000 "- Erosion Control 1 LS 90,000 90,000 Trench Safety Protection 45,000 LF 3 135.000 Total $5,588,000 ALTERNATE "A" TO KERRVILLE Mobilization 1 LS $120,000 $ 120,000 R.O.W. Preparation 1 LS 60,000 60,000 8" Force Main 25,100 LF 40 1,004,000 12" Sanitary Sewer Pipe 14,000 LF 60 840,000 _ Sanitary Sewer Manholes 30 EA 4,500 135,000 Cut & Patch Asphalt 100 SY 35 3,500 Lift Stations 1 LS 300,000 300,000 24" Bore, Jack or Tunnel 100 LF 600 60,000 _ 16" Bore, Jack or Tunnel 100 LF 450 45,000 Trench Safety Protection 14,000 LF 3 42,000 TOTAL $2,609,500 WASTEWATER SYSTEM WITH ALTERNATE A TO KERRVILLE Collection System $5,588,000 - Transmission Main 2.609,500 Total Construction $8,197,500 Planning & Design 900,000 Contingencies 900,000 Legal & Fiscal 400,000 Environmental 300,000 Total Wastewater $10,697,500 ALTERNATE "B" TO COMFORT Mobilization R.O.W. Preparation 8" Force Main 12" Sanitary Sewer Pipe Sanitary Sewer Manholes Cut & Patch Asphalt Lift Stations 24" Bore, Jack or Tunnel Trench Safety Protection l LS $200,000 $ 200,000 1 LS 100,000 100,000 7,000 LF 40 280,000 48,000 LF 60 2,880,000 66 EA 4,500 297,000 500 SY 35 17,500 1 LS 250,000 250,000 300 LF 600 180,000 48,000 LF 3 144,000 Total $4,348,500 WASTEWATER SYSTEM WITH ALTERNATE B DIRECT FLOW TO COMFORT Collection System Transmission Main Total Construction Planning & Design Contingencies Legal & Fiscal Environmental Total Wastewater $5,588,000 4.348.500 $9,936,500 900,000 900,000 400,000 300.000 $12,436,500 iI. Water Services As part of the regional water and wastewater services for Center Point, the feasibility study - has been expanded to cover water supply. The proposed water supply system _ would include a Surface Wa[er Treatment Plant on Center Point Lake, transmission lines to connect each of the four existing owner - operated water supply companies, an elevated water storage tank, ASR facilities far underground storage, - securing of Water Rights, and water distribution to areas not presently served Each of these items is - discussed in the following sections: A. Surface Water Treatment Plant Initial Service Areas The two major CCNs have agreed to change all or part of their supply from ground _ water to the new surface water supply. Both of these operators are having difficulty in maintaining the required water capacity with the rapidly depleting ground water. At present there are approximately 400 existing connections with an additional 100 - connections that could be served outside of the existing CCNs. Using 500 existing connections at 10,000 gal/mo would require approximately 150,000 gpd of supply. - Project potential growth within the regional service area of 3% per year for 25 years would result in approximately 1,000 connections or demand of 300,000 gpd. Since the service area is within the growth impact area of San Antonio, it is likely that significant new growth will occur and provisions should be made for expansion to serve that growth. On the basis of this evaluation, the initial design capacity should be a treatment plant of 200,000 gpd wit h expansion capability in 200,000 gpd increments as required. The proposed surface water treatment plant would be located on the high bank of Center Point Lake, along Center Point River Road, in the vicinity of the dam. The treatment plant will be a version of the membrane treatment process. B. Elevated Storaee The elevated water tank will be constructed adjacent to the treatment plant with a preliminary estimated capacity of 500,000 gallons and a tank bottom elevation of ^ 1600 feet. From this elevation, water service can be provided to the service area below 1600 feet elevation, which should cover moat of the growth area. C. Transmission Mains ^ Transmission mains will be installed to provide service to the various CCNs within the region and provide distribution to areas not presently serviced by any of the CCNs. The Distribution System is shown on Exhibit D. D. ASR Facilities "- ASR facilities aze to be included to allow storage of surplus water for use in times of surface water shortages or to relieve [he demand on ground water facilities. ^ Aquatex, the operator of the largest CCN, indicated that they have anon-producing well that might be a good injection well for the ASR. _ PRELIMINARY ESTIMATED QUANTITIES & PROBABLE COST REGIONAL WATER SYSTEM WATER TREATMENT SYSTEM Surface Water Treatment Plant - 200,000 gpd 200,000 gal. Membrane Plant _ Intake Structure Pumping Station & ASR 500,000 gal Elevated Storage Tank Total Treatment System WATER DISTRIBUTION SYSTEM Mobilization Right-of-Way Prep 6" Water Pipe 6° Gate Valve with Box, Complete 8° Water Pipe 8" Gate Valve with Box, Complete Tie-in to Existing Line Testing Fittings 2" Combination Air/Vac. Release Valve Cut & Patch Asphalt Bore, Jack Or Tunnel Dewatering Trench Safety Protection Total Distribution System Total Construction Planning, Design & Contingencies Legal & Fiscal Environmental Total Water Project Quantity 1 1 18,100 12 15,500 8 4 8 4 11,000 200 1 15,300 Unit LS LS LF EA LF EA EA LS TON EA SY LF LS LF Unit Price $ l OQ,00(l 50,000 20 900 25 1,250 ?,500 15,000 4,000 3,500 30 700 20,000 3 $ 400,000 300,000 300,000 750.000 $1,75o,oon Extension $] 00,000 50,000 362,000 10,800 387,500 10,000 10,000 15,000 32,000 14,000 330,000 140,000 2Q,000 45,900 $1,527,200 $3,277,200 800,000 200,000 100,000 $4,377,200 IV. Public Input After the initial public meeting at the Center Point School nn January 11, 2007, individual _ meetings were held with UGRA, Kendall County, WCID, City of Kerrville Public Works and Texas Water Development Board. An additional public meeting will be held to review the draft feasibility report and anticipated '-' implementation program. 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COMMUNITY OF CENTER POINT REGIONAL SERVICE AREA AND °"0JE4t N0~ E , P O coy _~ AND EASTERN KERR COUNTY " " vos3~ ooo~.oo oEac«co er " vx romo. .ws xam. TO COMFORT ALTERNATE B xe~ - ocsc"ionox wre eoro ~°c oww« " ~~ aec"eore. .u iiioi n's a±si Fax KERR COUNTY. TEXAS EXHIBITC owc. xo 3... or 4 Ir e~ €z l i ~ ." y ~ i Y~~ ~ ( ~ r~ ~ as 7 ~ wn t ! C , ~ ~ ~ ~-\`~- 1 J' i ~ t x 3 1 . is . ~° ~ r S w; ~=-rta i ~ L , ~ ~ ~ _. o j { .~'~ a ~ I ~,f l `~w p ~'~ -~-!. `„ ~ } t r f ~ . 5TP_.~ ~1C~ ~1 ~,. S ty ~ 11. t` `~ ,4 ••~A \ y ~ ~ sad ~ p i ~~.r* ~~j .. T / \ r e e /. . ,' . I __ ) ' «~ !~1 ~ ~ ~ ~ I ~, P °--~ _ oa nvCi~c TF:.>~i ME~tut us Kerr - -- Kerr County UGRA - -- Upper Guadalupe River Authority FA - -- Financial Advisor - RBC Capital Markets BC - -- Bond Counsel -McCall Parkhurst & Horton ENG - -- Engineer -Tetra Tech, Inc. RBC Capital Markets