October 2009 - South Tahoe Public Utility District

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PN-1. Inadequate land may be available to apply future recycled water flows. PN-2. Residential development is encroaching on agricultural land, reducing land available for recycled water irrigation. PN-3. Potential exists for nitrate accumulation in groundwater with unregulated recycled water irrigation application rates. PN-4. Existing recycled water application contracts with contract irrigators will expire in 2028. PN-5. Adequate emergency disposal facility and options are currently unavailable for recycled water. PN-6. Agricultural tail water containing recycled water may not be confined to permitted lands. PN-7. Operational control of the distribution system is insufficient. PN-8. The Diamond Ditch conveyance capacity currently does not meet the on demand recycled water flow rate of 25 cfs of the agreement between the District and the Contractor Irrigators. Additionally, the District does not have control of the Diamond Ditch. PN-9. Ability to meet Indian Creek Reservoir water quality requirements is impaired and the District needs to meet TMDL requirements for the Indian Creek Reservoir. PN-10. Recycled water system improvements are needed to improve operational flexibility. These issues are addressed by the recommendations of this Master Plan. Insofar as practical each of these issues is addressed by one or more Master Plan objectives and/or guiding principles. The projects presented in the Master Plan projects strive to address these system inadequacies to the greatest extent possible. 7.2 Master Plan Objectives Through discussion and debate at several meetings held with the District Board, staff, and the Alpine County Board a set of objectives to be addressed in the Master Plan were defined. These objectives focus on the following considerations. 1) Regulatory compliance 2) Operational reliability and flexibility 3) Environmental protection 4) Continuing the cooperative association with Alpine County stakeholders The following is a list of Master Plan objectives that influence the operations of the District‟s recycled water program and formulate the design of the Master Plan projects: ● ● To reuse and/or apply recycled water from the District‟s wastewater treatment plant in South Lake Tahoe to accommodate the projected growth of the system as defined by the adopted plans within the South Tahoe Public Utility District service area. To operate the recycled water application system in a manner that protects public health and safety and promotes the wise use of water resources. South Tahoe Public Utility District Recycled Water Facilities Master Plan - October 2009 Page 7-50
● ● ● ● ● To maximize reclamation, recycling and reuse of the available water resource to the greatest extent reasonably feasible. To optimize water resource conservation. To meet or exceed applicable responsible agency and institutional guidelines and requirements for reclamation, recycling and reuse. To minimize net operating costs and District expenditures. To work cooperatively with responsible agencies, jurisdictions and land owners/operators. To further define these objectives and set criteria in which to measure the feasibility of Master Plan concepts, ideas and operational practices, a set of guiding principles were established. These guiding principles define the objectives set forth by the District Board in sections 7.2.1 through 7.2.5. 7.2.1 Regulatory/Permitting The South Tahoe Public Utility District has undertaken the complex challenge of developing a long-range Master Plan in order to ensure existing and future regulatory compliance The permitting and regulatory obligations for operating both fresh water and recycled water systems must be upheld by the District to protect public health and ensure the protection of the environment. The difficulty of obtaining various permits and regulatory approvals is reviewed for each project. This includes environmental assessments, discharge permits, special use permits, easements, encroachment permits, land transfer approvals and Corps of Engineers permits. 7.2.2 Reliability and Flexibility In order to ensure successful, economical and responsible management of recycled water resources and to meet freshwater quality concerns, the District purchased the Diamond Valley Ranch in 2006 for potential future recycled water application. Each of the Master Plan projects were reviewed with respect to the District‟s requirements for management reliability and flexibility. The following criteria were used to assess the benefit of each proposed project: • Ownership and Easements – Evaluate ownership and accessibility for long-term operation and maintenance. • Regulatory Compliance – Evaluate the ability to comply with current and anticipated regulations and permits. Consider the probability of non-compliance. • Longevity/Security – Look at the ability of a proposed project to provide long-term reliability and alleviate the effect of circumstances outside the District‟s control such as sale of an application site, development adjacent to a site, public opinion, extreme weather or natural occurrences. • Emergency Response – Evaluate the reliability of those proposed projects that provide emergency disposal, conveyance or temporary storage. • Reliance on Existing Agreements – Assess the ability to extract the District from undesirable contractual arrangements, or assess the benefit of being party to other agreements. South Tahoe Public Utility District Recycled Water Facilities Master Plan - October 2009 Page 7-51
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South Tahoe Public Utility District
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Table of Contents List of Tables ..
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6.4.3 Endangered Species Act ......
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Section 13: 12.4 Potential Temporar
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11.2 - Indian Creek Freshwater Trea
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Executive Summary Introduction, Pur
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Through a process of public partici
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Table ES-2 presents vital numbers r
Page 17 and 18: Section 7 - Master Plan Development
Page 19 and 20: Section 1: Introduction The purpose
Page 21 and 22: agreement between South Lake Tahoe
Page 23 and 24: irrigation ditches were used to irr
Page 25 and 26: Agreement Name 1967 Agreement Harve
Page 27 and 28: Agreement Name Celio Agreement Tent
Page 29 and 30: Section 2: Study Area 2.1 Descripti
Page 31 and 32: ecycled water facilities and public
Page 33 and 34: Section 3: Existing Freshwater Syst
Page 35 and 36: Figure 3.2: Indian Creek Reservoir
Page 37 and 38: Section 4: Existing Recycled Water
Page 39 and 40: Farm lateral must be intact to util
Page 41 and 42: 4.2.1.3 Neddenriep Ranch Partnershi
Page 43 and 44: Development in areas currently rece
Page 45 and 46: Flow (MGD) Section 5: Flow Projecti
Page 47 and 48: Table 5.0: Recycled Water Flow and
Page 49 and 50: Volume of Recycled Water (AFY) Tabl
Page 51 and 52: estimated 2028 population of 33,900
Page 53 and 54: Figure 5.2.1(b): NO 3-N versus Time
Page 55 and 56: Figure 5.2.1(f): Total Dissolved So
Page 57 and 58: 5.2.4 Groundwater Monitoring The Di
Page 59 and 60: Section 6: Recycled Water Quality R
Page 61 and 62: Services (DHS) to establish water r
Page 63 and 64: „Secondary treatment‟ means the
Page 65 and 66: 6.4.4 Section 401 of the Clean Wate
Page 67: Section 7: Master Plan Development
Page 71 and 72: annually. This inconsistency can be
Page 73 and 74: Each workshop conducted in 2001 was
Page 75 and 76: Section 8: Development of Projects
Page 77 and 78: Table 8.1 Recycled Water Facilities
Page 79 and 80: Section 9: Recycled Water Infrastru
Page 81 and 82: Several options exist for efficient
Page 83 and 84: Reservoir outlet facility to Diamon
Page 85 and 86: 9.4.1 Project Description The desig
Page 87 and 88: 9.5.1 Project Description Improveme
Page 89 and 90: monitoring and SCADA control system
Page 91 and 92: Pressure required to allow full fun
Page 93 and 94: elatively minor in comparison to op
Page 95 and 96: Section 10: Recycled Water Manageme
Page 97 and 98: with recycled water. This and other
Page 99 and 100: Section 11: Fresh Water Infrastruct
Page 101 and 102: Like Project No. 14 (page 11-81), p
Page 103 and 104: available storage volume of the Res
Page 105 and 106: Section 12: Fresh Water Management
Page 107 and 108: Section 13: Master Plan Implementat
Page 109 and 110: 13.2 Recycled Water Production Trig
Page 111 and 112: Ranch Total Acreage Table 13.1 - Ac
Page 113 and 114: 13.3 Regulation Triggered Project I
Page 115 and 116: District to realize an economic ben
Page 117 and 118: pipeline from the beginning of the
Page 119 and 120:
13.8 Capital Improvement Plan The M
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2) Construct Project No.‟s 1, 2,
Page 123 and 124:
13.9.3 Groundwater Monitoring Recom
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It is recommended that District imp
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October 2009 - South Tahoe Public Utility District

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