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Chapter 2 | Elsinore Valley Subbasin Groundwater Sustainability Plan | Evmwd

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Chapter 2 | Elsinore Valley Subbasin Groundwater Sustainability Plan | Evmwd CHAPTER 2 | ELSINORE VALLEY SUBBASIN GROUNDWATER SUSTAINABILITY PLAN | EVMWD Contents Chapter 2 ‐ Plan Area . Description of the Plan Area ‐ . Geographic Area ‐ . Land Use Jurisdictional Agencies ‐ .. Counties ‐ .. Cities ‐ .. Federal Lands ‐ .. State Lands ‐ .. Others ‐ . Water Supply ‐ .. Water Providers ‐ .. Water Supply Sources ‐ .. Water Use Sectors ‐ . Water Resources Monitoring Programs ‐ .. Climate ‐ .. Surface Water Flows ‐ .. Surface Water Quality ‐ .. Groundwater Levels ‐ .. Groundwater Quality ‐ .. Groundwater Production ‐ .. Conjunctive Use/Managed Recharge ‐ .. Recycled Water ‐ .. Imported Water ‐ .. Land Use ‐ .. Land Subsidence ‐ .. Incorporation of Existing Monitoring into GSP ‐ . Water Resources Management ‐ .. Elsinore Basin Groundwater Management Plan ‐ .. Groundwater Monitoring Plan and Management Reports ‐ .. Water Quality Control Plan for the Santa Ana River Basin ‐ FINAL DRAFT | JUNE | i pw://Carollo/Documents/Client/CA/EVMWD/A/Deliverables/Draft GSP Chapters/Ch EVMWD | ELSINORE VALLEY SUBBASIN GROUNDWATER SUSTAINABILITY PLAN | CHAPTER 2 2.6.4 Upper Temescal Valley Groundwater Management Zone SNMP 2-30 2.6.5 2018 Triennial Report on Water Supply and Recycled Water in the EVMWD - Salinity Trends and Management 2-31 2.6.6 Impacts of Septic Tanks on Groundwater Quality 2-33 2.6.7 Western Municipal Water District Updated Integrated Regional Water Management Plan 2-34 2.6.8 EVMWD Urban Water Management Plans 2-34 2.6.9 Recycled Water System Master Plan 2-35 2.6.10 EVMWD Integrated Resources Plan 2-35 2.6.11 Indirect Potable Reuse Feasibility Study 2-36 2.6.12 Hydrogeologic Study of the Warm Springs Groundwater Subbasin 2-36 2.6.13 Lake Elsinore Water Management 2-37 2.6.14 Water Conservation Business Plan 2-37 2.6.15 Drought Contingency Plan 2-38 2.6.16 Water Resources Management Implementation Status 2-38 2.7 General Plans 2-39 2.7.1 Riverside County General Plan 2-40 2.7.2 City of Lake Elsinore General Plan 2-41 2.7.3 City of Canyon Lake General Plan 2-42 2.7.4 General Plan Influences on EVGSA's Ability to Achieve Sustainability 2-42 2.7.5 GSP Influences on General Plans 2-42 2.8 Additional GSP Elements 2-42 2.8.1 Wellhead Protection Areas and Recharge Areas 2-42 2.8.2 Groundwater Well Permitting, Construction, and Destruction Requirements 2-43 2.8.3 Groundwater Contamination Migration and Clean-Up 2-43 2.8.4 Conjunctive Use and Underground Storage Program 2-44 2.8.5 Miscellaneous Measures 2-47 2.8.6 Efficient Water Management Practices 2-47 2.8.7 Relationships with State and Federal Agencies 2-47 2.8.8 Land Use Plan Coordination 2-47 2.8.9 Impacts on Groundwater Dependent Ecosystems 2-47 2.8.10 Control of Saline Water Intrusion 2-47 2.9 Notice and Communication 2-48 ii | JUNE 2020 | FINAL DRAFT CHAPTER 2 | ELSINORE VALLEY SUBBASIN GROUNDWATER SUSTAINABILITY PLAN | EVMWD Tables Table 2.1 Status of Recommended Management Activities 2-39 Table 2.2 Select Policies in the Riverside County General Plan 2-40 Table 2.3 Status of Contamination Sites in the Elsinore Valley Subbasin 2-44 Figures Figure 2.1 Elsinore Valley Subbasin Location 2-3 Figure 2.2 Elsinore Valley Groundwater Subbasin GSP Area 2-5 Figure 2.3 Jurisdictional Areas 2-7 Figure 2.4 Federal and State Lands 2-9 Figure 2.5 Percentage Contribution of EVMWD Water Supplies (Source MWM, 2018) 2-11 Figure 2.6 EVMWD Facilities 2-13 Figure 2.7 Groundwater Wells in the GSP Area 2-15 Figure 2.8 Existing Land Use 2-19 Figure 2.9 Monitoring Site Locations 2-23 Figure 2.10 Groundwater Contamination Sites 2-45 FINAL DRAFT | JUNE 2020 | iii CHAPTER 2 | ELSINORE VALLEY SUBBASIN GROUNDWATER SUSTAINABILITY PLAN | EVMWD Chapter 2 PLAN AREA This chapter provides a description of the plan area and setting, consistent with the Groundwater Sustainability Plan (GSP) Regulations §354.8. 2.1 Description of the Plan Area The description of the plan provides a general description of the Elsinore Valley Subbasin GSP Area (GSP Area) and is organized into the follow sections: • Geographic Area. • Jurisdictional Agencies. • Water Supply. • Water Resources Monitoring and Management Programs. • General Plans. • Additional GSP Elements. • Notice and Communication. The description of the plan area was developed from previous reports and studies. The Groundwater Management Plan (2005 GWMP) for the Elsinore Area, a portion of the Elsinore Valley Subbasin, was developed by Elsinore Valley Municipal Water District (EVMWD) in 2005 (MWH, 2005) and was implemented in 2008 (MWH, 2011). The 2005 GWMP was used as background information for this chapter. Various studies and plans, developed more recently than the 2005 GWMP, were used to develop the description of the plan area. 2.2 Geographic Area The Elsinore Valley Subbasin is located in the Santa Ana River Watershed and underlies the Elsinore Valley in western Riverside County. The location of the Elsinore Valley Subbasin is presented on Figure 2.1. The boundary of the GSP Area, which is coincident with the Elsinore Valley Subbasin boundary is shown on Figure 2.2. The GSP Area is covers approximately 23,600 acres. The boundaries of the Bedford-Coldwater Subbasin, located to the northwest, and the Temecula Valley Subbasin, located to the southeast, are also presented on Figure 2.2. GSPs are under development of the Bedford-Coldwater Subbasin and the Temecula Valley Subbasin. The hydrogeologic conditions of the Elsinore Valley Subbasin are described in detail in Chapter 3. The Elsinore Valley Subbasin is bounded by the Willard fault, a splay of the active Elsinore fault zone, and Santa Ana and Elsinore Mountains on the southwest; the Temecula Valley Groundwater Basin at a low surface drainage divide on the southeast; the Temescal Subbasin of the Upper Santa Ana River Valley Groundwater Basin at a constriction in Temescal Wash on the northwest; and non-water bearing rocks of the Peninsular Ranges along the Glen Ivy fault on the northeast (MWH, 2011). In general, inflows to the subbasin are predominantly from the canyons to the northwest and the San Jacinto River on the northeast. FINAL DRAFT | JUNE 2020 | 2-1 EVMWD | ELSINORE VALLEY SUBBASIN GROUNDWATER SUSTAINABILITY PLAN | CHAPTER 2 The general groundwater flow direction is from the northwest to the southeast, largely a result of groundwater extraction in the southeast region (Elsinore Area) of the Elsinore Valley Subbasin. 2.3 Land Use Jurisdictional Agencies Land use and land management activities can influence water demands, recharge potential, and water quality. This section identifies and describes the agencies with land use management responsibilities with the GSP Area. Detailed discussion of land use planning and policies relevant to groundwater management is included in Section 2.7. The jurisdictional boundaries for agencies that have land use management responsibilities in the GSP Area are shown on Figure 2.3. In general, these agencies can be categorized as follows: • Counties. • Cities. • Federal Lands. • State Lands. • Others. 2.3.1 Counties The GSP Area lies within the western portion of Riverside County. Riverside County has jurisdiction for land use planning for unincorporated areas in the County. The southwest portion of the GSP Area is within unincorporated area in Riverside County. Riverside County also has responsibility for small water systems (between 15 and 199 service connections) and for on-site wastewater treatment systems (OWTSs) through its Department of Environmental Health. Riverside County Department of Environmental Health is also responsible for regulation of the construction, destruction, and maintenance of groundwater wells. 2.3.2 Cities The City of Lake Elsinore, City of Canyon Lake, and the City of Wildomar have land use planning authority within their respective boundaries. The City of Canyon Lake overlaps only a very small portion of the GSP Area along the San Jacinto River. General plan elements relevant to the GSP are discussed Section 2.7. In addition to land use planning, the cities of Lake Elsinore and Wildomar are responsible for stormwater management for their respective jurisdictions. 2.3.3 Federal Lands State and Federal Lands in the GSP Area are presented on Figure 2.4. There are small portions of the GSP Area within United States Forest Service (USFS) Land and Non-Forest Service Land (lands within the Forest Service boundary with undetermined ownership) within the USFS. The USFS Land is the Cleveland National Forest. Resource management efforts in the Cleveland National Forest target fire, ecology, archaeological resources, and recreational resources. 2.3.4 State Lands There are no State Lands in the GSP Area. 2.3.5 Others The Canyon Lake Property Owners Association (POA) has responsibility for stormwater management within the City of Canyon Lake. 2-2 | JUNE 2020 | FINAL DRAFT CHAPTER 2 | ELSINORE VALLEY SUBBASIN GROUNDWATER SUSTAINABILITY PLAN | EVMWD Legend Ca jo n C a Major Rivers n y o n Minor Rivers C S r h e a e y Lakes k k C e r L re e Santa Ana River y C e t r l k eC a Watershed r e e B e k County Boundaries Elsinore Valley Subbasin k k k e GSP Area Boundary e e e r e e r r C C Mill C Creek r e n o e i i e a O n D o v t Ontario e Redlands n Miles S A SAN BERNARDINO COUNTY 0 5 10 n n uc aipa Creek a Y RIVERSIDE COUNTY a S Data Sources: City of Lake Elsinore, S Cal-Atlas, DWR Bulletin 118, National iver R Hydrography Dataset, SAWPA LOS ANGELES COUNTY a k An e e Disclaimer: Features shown in this ORANGE COUNTY a r t C figure are for planning purposes and an S o Banning represent approximate locations. r e Engineering and/or survey accuracy r t is not implied.
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