20220216-004a: Violet Crown SERs #5111 & #5112 Staff Presentation — original pdf

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Violet Crown Water & Wastewater Service Extension Request #5111 & 5112 What is an SER? • A service extension request, or SER, is an application for City water or wastewater service from a property owner or developer. • SERs are required when a property is located more than 100 feet from an accessible water or wastewater system, or when existing infrastructure isn't adequate for the proposed project demands. • Service may involve the construction of a new line or an associated facility or upgrades to existing lines or facilities. • The applicant pays for the associated infrastructure, as outlined in the SER. SER Process • Per the Land Development Code, SERs require Council approval if the property is in the Drinking Water Protection Zone and outside of the City's full purpose jurisdiction. • Environmental Commission and Water & Wastewater Commission review and make recommendations on SERs that require Council approval. Request Summary • 70.95 acres • 2-Mile ETJ • Barton Creek Watershed, Barton Springs Zone • Located in the Edwards Aquifer Contributing Zone • Drinking Water Protection Zone (DWPZ) • Subject to Save Our Springs (SOS) Ordinance Request Summary Living Unit Equivalent (LUE) is the typical flow that would be produced by a single-family residence located in a typical subdivision. Standard conversions are applied depending on the proposed use to determine the number of LUEs a project will generate. SER #5111 & 5112 Site Location Austin City Limits Austin ETJ Edwards Aquifer Recharge Zone Edwards Aquifer Contributing Zone Site Location Site Location Limited Purpose 2 Mile ETJ Barton Creek Habitat Preserve SER #5111 & 5112 Environmental Impacts • No known CEFs, CWQZ, or WQTZ • Does not drain to occupied salamander habitat • Significant slopes greater than 15% that will require Land Use Commission variances for cut and fill • Located in the Barton Springs Zone • Adjacent to Barton Creek Habitat Preserve SER #5111 Proposed Water Extension Map provided by Austin Water SER #5111 Proposed Water Extension, continued Map provided by Austin Water SER #5112 Proposed Wastewater Extension Map provided by Austin Water SER #5112 Proposed Wastewater Extension, continued Map provided by Austin Water SER #5112 Alternative Wastewater Service • Net site area impervious cover = 20% • If service is not extended to the site and wastewater disposal is required, the applicant would likely apply for a Texas Land Application Permit (TLAP) issued by the Texas Commission on Environmental Quality (TCEQ) • This would require an estimated amount of 30 acres for wastewater irrigation, which would need to be deducted from impervious cover limits. • This area also contains steep slopes, which may further limit the amount of suitable area for wastewater irrigation. Staff Recommendation Staff recommends denial. • The impacts from the proposed water and wastewater line would require significant infrastructure improvements in an environmentally sensitive area that the City of Austin is actively working to protect for water quality and endangered species. Contact Information Kaela Champlin Watershed Protection Department City of Austin (512) 974-3443 kaela.champlin@austintexas.gov