caldwell county regional water and wastewater planning study

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Future growth in Caldwell County will increase wastewater production to anestimated 10.2 mgd. If 70 percent of the wastewater is treated by regionalwastewater treatment plants, the volume of wastewater produced will be 7.1 mgd.If 50 percent of the reclaimed water is reused, the wastewater to be discharged tostreams will be 3.6 mgd. If Type I reclaimed water is produced, the futurepollutant loading will be less than the current loading. Table 14-6 illustrates thiscomparison.YearTable 14-6Comparison of Future Changes to Annual Pollutant Load to StreamsPortion ofPermitted FlowCBOD 5,Total SuspendedDischarged to pounds per year Solids, pounds peryearStreams, mgdNH 3 as N,pounds peryear2010* 4 137,056 190,356 36,5492040** 3.6 54,822 54,822 21,929Difference 0.4 82,234 135,534 14,620* Based on existing discharge pollutant limits** Based on Type I Reclaimed Water and 50 % reuse of reclaimed water14.12.2 Stormwater Filter Strips Along StreamsStormwater runoff produces significant pollutant loading for streams in CaldwellCounty. Vegetated filter strips adjacent to streams can provide significantstormwater treatment as overland flow passes through the filter strips.It is recommended that entities in Caldwell County that have regulatory authorityimplement requirements for filter strips adjacent to streams. The filter stripsshould be on each side of the stream with the width of the filter strip beingmeasured from the top of bank for the stream. The recommended filter stripswidths are presented in Table 14-7.Klotz Associates Project No. 0972.000.000January 201014-20Caldwell County Regional Water and Wastewater Planning StudyFinal Report
Table 14-7Vegetated Filter Strip Width RequirementsDrainage Area ofStream at DesignPoint, AcresFilter Strip Width,Feet0 to 10 10>10 to 100 25>100 5014.12.3 Water Quality Remediation Associated with Impervious CoverInstallationIncreased stormwater runoff associated with installation of impervious coverresults in increased pollutant loading associated with the stormwater. Capturingand filtering the “first-flush” runoff can significantly reduce pollutant loads. Inaddition, development rules that encourage limited impervious cover on tractsshould be utilized.It is recommended that entities in Caldwell County (those that have regulatoryauthority) implement requirements for limited impervious cover on tracts andrequirements to capture and filter first flush runoff. The recommended imperviouscover limits and filter requirements are presented in Table 14-8.Table 14-8Impervious Cover FiltrationRequirementsVolume ofImpervious Cover Water to BePercentageFiltered,Inches0 to 20 0.00>20 to 50 0.50>50 to 80 0.75>80 to 100 1.00Klotz Associates Project No. 0972.000.000January 201014-21Caldwell County Regional Water and Wastewater Planning StudyFinal Report
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CALDWELL COUNTY REGIONAL WATERAND W
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C O N S U L T I N G E N G I N E E R
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flows without impacting environment
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viable for Caldwell County are wate
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parameters and needs. For purposes
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SECTION 1INTRODUCTION1.1 Background
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A Grant Application for a Regional
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1.4 Participants and SponsorsThe Ca
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SECTION 2CALDWELLL COUNTY CHARACTER
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Construction for segments 5 and 6 o
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Watershed and Peach Creek Watershed
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2.4 Certificates of Convenience and
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Klotz Associates Project No. 0972.0
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GRAPH 2-1Lockhart, Texas Monthly Av
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water quality in the county. Finall
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SECTION 4GROUNDWATER4.1 Groundwater
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efore 1953. Deterioration in water
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loose sand. The sand tends to be fr
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4.3 Groundwater Conservation Distri
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support the efforts of PCCD. The di
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SECTION 5SURFACE WATER5.1 GeneralSu
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GRAPH 5-1Caldwell County Total Surf
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GRAPH 5-2TWDB- Caldwell County Hist
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SECTION 6POPULATION6.1 Population P
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GRAPH 6-1TWDB Population Projection
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GRAPH 6-3Texas State Data Center Po
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TABLE 6-2Planning Study Population
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7.1.2 City of LockhartThe City of L
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Neiderwald. The service area in Cal
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purchase capacity of 6.0 MGD. The a
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Lockhart. The plant is capable of d
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In 1994 GBRA began operating the Ci
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7.3.5 Sweetwater Utility, LLCSweetw
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TABLE 8-1Caldwell County - TWDB His
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Municipal water demand projections
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applicable. A “P” in the Region
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the modified TSDC Scenario 1.0, sho
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GRAPH 8-3Caldwell County Survey Res
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GRAPH 8-4Caldwell County Yearly Wat
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espectively from the information pr
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TABLE 9-6Caldwell County Projected
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10.3 United States Environmental Pr
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10.4.3 Source Water ProtectionSourc
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10.6.1 E.coli PotentialIt is estima
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TABLE 10-4Estimated Loadings from U
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The proposed GBRA Mid-Basin Project
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Page 122 and 123: SECTION 12REGIONAL WATER PLANNING12
Page 124 and 125: TABLE 12-2Caldwell County Water Sup
Page 126 and 127: Klotz Associates Project No. 0972.0
Page 128 and 129: 12.3.2 DistributionThe water will b
Page 130 and 131: 12.4 Water System Cost EstimatesVar
Page 132 and 133: 300272GRAPH 13-1Caldwell County OSS
Page 136 and 137: 2. The Martindale Regional Facility
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Page 142 and 143: associated costs. Efficient and fun
Page 146 and 147: 14.3 Water Quality Concerns and Sou
Page 148 and 149: wastewater plant return flows. The
Page 150 and 151: 14.6 Recommended Load ReductionsLoa
Page 152 and 153: 14.7.2 Water Quality Development Or
Page 154 and 155: 14.8.3 Vegetative Filter StripsVege
Page 156 and 157: Use constructed wetlands to capture
Page 158 and 159: 14.12 Implementation Recommendation
Page 160 and 161: Type II reclaimed water is defined
Page 162 and 163: Pollutant loading to streams from e
Page 166 and 167: 14.12.4 OSSF Annual Inspection and
Page 168 and 169: Water Quality Monitoring Program -
Page 170 and 171: execute strategies. Local, state, a
Page 172 and 173: the environment. Funding for the pr
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Page 178 and 179: Mid-Basin Project and associated fa
Page 180: C O N S U L T I N G E N G I N E E R
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Page 193 and 194: APPENDIX B0 / ?% '(0 ;6 ) , 6
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Page 201 and 202: C O N S U L T I N G E N G I N E E R
Page 203 and 204: C O N S U L T I N G E N G I N E E R
Page 205 and 206: State WellNumber6702902670290567029
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State WellNumber6713603671360567136
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APPENDIX EThe tables presented in t
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APPENDIX EWaterUserGroupTABLE 7PROJ
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APPENDIX ERules of the Gonzales Cou
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APPENDIX EAVERAGE QUEEN CITY OR SPA
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Historical Water Use Summary by Cou
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Historical Water Use Summary by Gro
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UseCodePriority DatePriority Month,
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CountyName1 = Anderson 52 = Crane 1
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WRNoWRTypeWRSeqAPPENDIX GTCEQ SURFA
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APPENDIX HWATER CONSERVATION MEASUR
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APPENDIX HWater Rate StructureAn in
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APPENDIX HLeak Detection and Repair
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APPENDIX I• The cities of Kyle, L
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Management MeasureSeptic System Ins
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Outreach ActivityAgricultural Progr
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APPENDIX KWhereas the parties to th
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RESPONSE TO WRITTEN COMMENT BY JOHN
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APPENDIX MCaldwell County Regional
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APPENDIX NTEXAS WATER DEVELOPMENT B
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APPENDIX NKlotz Associates, Inc.Res
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APPENDIX NKlotz Associates Response
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