The overall project area consists of 651.42 acres, which includes the proposed Arts and Entertainment Neighborhood (341.72 acres) and four Housing Element Properties: Lot 16A is 11.04 acres, Lot 16B is
8.65 acres, Lot 20A is 7.76 acres, and Lot 20B is 9.92 acres.
1.2 PROJECT DESCRIPTION
The project proposes to update the City of Santee General Plan, modify the Arts and Entertainment Neighborhood (AEN), and provide objective design standards and contextual designs for four strategic Housing Element sites within the TCSP.
The proposed project consists of a comprehensive update to the TCSP to modify or establish new land use designations, land uses, development standards, and conceptual guidelines that would apply to future development within the TCSP area. As part of this effort, the City would also make modifications to the AEN and provide objective design standards and conceptual designs for strategic Housing Element sites within the TCSP. A more detailed description of each of the proposed project components is described below. Refer to Figure 3, TCSP Land Uses.
1.2.1 Town Center Specific Plan
Amendments to the TCSP would incorporate relevant updates to the plan’s vision, land use permissions, and development standards. As part of the updates, new text and graphics would be developed and organized into a series of chapters, such as: Introduction, Land Use and Urban Form, Mobility and Beautification, Infrastructure and Public Facilities, Implementation, and Administration. Text and concepts that remain relevant to the vision and goals of the TCSP would be maintained and incorporated into the updated TCSP document format and structure.
Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 2 The amended TCSP would incorporate updated allowable and permitted land uses and development standards tailored to the project area. The updated TCSP would include graphics that illustrate the planned land use concepts and the plan’s vision at key sites. As part of the TCSP, the circulation network exhibits of the plan would be updated, including the bicycle, pedestrian, and transit network maps, and street cross sections. The TCSP would include concepts for key improvements in the public right-of-way to enhance circulation within the project area. The TCSP would incorporate concepts to illustrate wayfinding and branding signage at important locations within the public right-of-way and public trails, such as signs tailored for pedestrian, bicyclists and transit users, signs designed to direct vehicular traffic and refer to parking areas, as well as iconic gateway structures that enhance the identity and sense of place in the project area.
The TCSP would also outline fundamental elements for the administration of the plan, such as the process for future specific plan amendments, and the development review, permit, and approval process for projects within the TCSP area. Additionally, the TCSP would address the relationship between the TCSP document and other planning documents, as well as consistency with the General Plan. The TCSP would also include a section describing how to use the document and guide reviewers and applicants through the path for review and approval of proposals within the TCSP area.
Finally, the TCSP amendment would also incorporate an adjustment to the Specific Plan boundaries to include additional sites such as the shopping center located at the northwest corner of Mission Gorge Road and Cuyamaca Street, and the shopping center located west of Cuyamaca Street, between Mission Creek Drive and River Park Drive. As a result of the boundary adjustment, the TCSP area would expand from 609.70 to 651.42 acres1, increasing by 41.72 acres.
1.2.2 Arts & Entertainment Neighborhood
The TCSP would include an amendment to the AEN. As discussed above, the City adopted the AEN in 2019, with the intent of encouraging the development of an Arts & Entertainment Neighborhood within a significant portion of the TCSP. The update would incorporate the vision, guidelines, and development standards specific to the AEN as a subsection of the Land Use and Urban Form chapter of the TCSP. This section of the TCSP would also incorporate tailored land use designations that support uses related to art and culture, entertainment, commercial recreation, visitor, and civic uses.
The update to the vision and development standards for the AEN would aim to enhance connections to the San Diego River, strengthen the sense of place by creating an attraction for residents and visitors to gather, and public space concepts that would incorporate streetscape concepts with features such as landscaping, water elements, shade, lighting, and wayfinding. The concepts would also aim to create a central destination within the TCSP area, with a strong emphasis on connecting Arts & Entertainment to the natural environment.
Additionally, the update would incorporate an adjustment to the AEN boundaries to include additional sites such as the open space designated areas along the San Diego River, areas north of the San Diego River, south of Riverwalk Drive, west of River Park Drive, east of Cuyamaca Street, and west of Magnolia 1 The original Town Center Specific Plan published in 1986 cited the TCSP area as 706 acres, however amendments to the plan have reduced the Specific Plan total acreage. Additionally, the original acreage was based on an estimate; due to improved geographic information software over time, the number of reported acres in the TCSP has changed as the accuracy of the data has increased.
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Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 3 Avenue. As a result of the boundary adjustments, the AEN area would expand from 172.492 to 341.72 acres, increasing by a total of 169.23 acres.
1.2.3 Four Strategic Housing Element Sites (2021-2029 Sixth Cycle) The City Council adopted the Housing Element (2021-2029 Sixth Cycle) on May 11, 2022. The Housing Element was prepared in compliance with State housing law as determined by the California Department of Housing and Community Development on December 6, 2022. The Housing Element included a Sites Inventory map and table (Figure C-1 and Table C-1 of the Housing Element), that included a series of sites that are currently undeveloped or underutilized. The identified sites provide an opportunity for the City to meet its Regional Housing Needs Allocation housing production goals. Four strategic undeveloped housing sites identified in the Sites Inventory are located within the boundary of the TCSP and the AEN. The sites are identified as 16A, 16B, 20A, and 20B. Sites 16A and 16B are undeveloped sites located just north of Mission Gorge Road and east of Riverview Parkway in the Santee Town Center. The area surrounding the sites is primarily developed with Santee Trolley Square immediately west of the site, the Las Colinas Detention Facility to the east, and open space associated with the San Diego River to the north. A portion of Site 16A is located within the Airport Safety Zone 4 as designated in the Gillespie Field Land Use Compatibility Plan (ALUCP). Sites 20A and 20B are undeveloped sites located just west of Magnolia Avenue, south of Riverview Parkway, and east of Edgemoor Drive. Sites 20A and 20B surround the Historic Edgemoor Polo or Dairy Barn. To the west of Site 20A is the Las Colinas Detention Facility, to the east is a gated 55+ manufactured home community.
Site 20B is bordered by single-family residential homes to the south, multifamily residential to the east, and Las Colinas and Riverview Office Park to the west. A portion of the site is located within the Gillespie Field ALUCP Airport Safety Zone 4. The sites are proposed to be developed with residential uses.
The Housing Element Implementation Program identified specific sites that would require rezoning to allow for residential uses, and/or to allow for the estimated housing capacity included in the Housing Element. The Housing Element proposed zoning changes for sites 16A, 16B, 20A, and 20B. As part of the realization of the Housing Element Implementation Program, the City analyzed and approved the rezone of the four above-mentioned sites and adopted the rezoning on October 26, 2022. The zoning for sites 16A, 16B, 20A, and 20B as a result of the Housing Element Implementation Program can be found in Table 1, Housing Element Sites Zoning.
Table 1
HOUSING ELEMENT SITES ZONING
Site Size (acres) Current Zoning Current Density
16A 11.11 Residential (TC-R-30) Minimum of 30 du/ac, Maximum of 36 du/ac 16B 8.61 Residential (TC-R-14) Minimum of 14 du/ac, Maximum of 22 du/ac 20A 7.75 Residential (TC-R-22) Minimum of 22 du/ac, Maximum of 30 du/ac 20B 10.00 Residential (TC-R-30) Minimum of 30 du/ac, Maximum of 36 du/ac To further advance the housing production in Santee, City staff applied for a Housing Acceleration Program (HAP) grant from the San Diego Association of Governments (SANDAG), which was awarded.
The HAP grant provides funding for project-level analysis of Housing Element sites 16A, 16B, 20A, and 20B. The amended TCSP will include graphics and data that illustrate site planning and development 2 The 2019 Art and Entertainment Overlay District refers to 155 acres; however, current GIS data shows 172 acres for the same area.
Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 4 concepts for each of these sites based on the maximum allowable density allowed by zoning. The Environmental Impact Report (EIR) will analyze these sites at a project-level of detail.
1.3 NOISE AND SOUND LEVEL DESCRIPTORS AND TERMINOLOGY
1.3.1 Descriptors
All noise level or sound level values presented herein are expressed in terms of decibels (dB), with A-weighting (dBA) to approximate the hearing sensitivity of humans. Time-averaged noise levels are expressed by the symbol LEQ, with a specified duration. The CNEL is a 24-hour average, where noise levels during the evening hours of 7:00 p.m. to 10:00 p.m. have an added 5 dBA weighting, and noise levels during the nighttime hours of 10:00 p.m. to 7:00 a.m. have an added 10 dBA weighting. This is similar to the Day Night sound level (LDN), which is a 24-hour average with an added 10 dBA weighting on the same nighttime hours but no added weighting on the evening hours. Sound levels expressed in CNEL are always based on dBA. These metrics are used to express noise levels for both measurement and municipal regulations, as well as for land use guidelines and enforcement of noise ordinances.
1.3.2 Terminology
1.3.2.1 Sound, Noise, and Acoustics
Sound can be described as the mechanical energy of a vibrating object transmitted by pressure waves through a liquid or gaseous medium (e.g., air) to a hearing organ, such as a human ear. Noise is defined as loud, unexpected, or annoying sound.
In the science of acoustics, the fundamental model consists of a sound (or noise) source, a receiver, and the propagation path between the two. The loudness of the noise source and obstructions or atmospheric factors affecting the propagation path to the receiver determines the sound level and characteristics of the noise perceived by the receiver. The field of acoustics deals primarily with the propagation and control of sound.
1.3.2.2 Frequency
Continuous sound can be described by frequency (pitch) and amplitude (loudness). A low-frequency sound is perceived as low in pitch. Frequency is expressed in terms of cycles per second, or Hertz (Hz) (e.g., a frequency of 250 cycles per second is referred to as 250 Hz). High frequencies are sometimes more conveniently expressed in kilohertz (kHz), or thousands of Hertz. The audible frequency range for humans is generally between 20 Hz and 20,000 Hz.
Sound Pressure Levels and Decibels
The amplitude of pressure waves generated by a sound source determines the loudness of that source.
Sound pressure amplitude is measured in micro-Pascals (µPa). One µPais approximately one hundred billionth (0.00000000001) of normal atmospheric pressure. Sound pressure amplitudes for different kinds of noise environments can range from less than 100 to 100,000,000 µPa. Because of this wide range of values, sound is rarely expressed in terms of µPa. Instead, a logarithmic scale is used to describe sound pressure level (SPL) in terms of dBA. The threshold of hearing for the human ear is about 0 dBA, which corresponds to 20 µPa.
Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 5 1.3.2.3 Addition of Decibels
Because decibels are logarithmic units, SPL cannot be added or subtracted through standard arithmetic.
Under the decibel scale, a doubling of sound energy corresponds to a 3 dBA increase. In other words, when two identical sources are each producing sound of the same loudness, the resulting sound level at a given distance would be 3 dBA higher than from one source under the same conditions. For example, if one automobile produces an SPL of 70 dB when it passes an observer, two cars passing simultaneously would not produce 140 dBA—rather, they would combine to produce 73 dBA. Under the decibel scale, three sources of equal loudness together produce a sound level 5 dBA louder than one source.
Under controlled conditions in an acoustical laboratory, the trained, healthy human ear is able to discern 1-dBA changes in sound levels, when exposed to steady, single-frequency (“pure-tone”) signals in the mid-frequency (1,000 Hz–8,000 Hz) range. In typical noisy environments, changes in noise of 1 to 2 dBA are generally not perceptible. It is widely accepted, however, that people begin to detect sound level increases of 3 dB in typical noisy environments. Further, a 5-dBA increase is generally perceived as a distinctly noticeable increase, and a 10-dBA increase is generally perceived as a doubling of loudness.
No known studies have directly correlated the ability of a healthy human ear to discern specific levels of change in traffic noise over a 24-hour period. Many ordinances, however, specify a change of 3 CNEL as the significant impact threshold. This is based on the concept of a doubling in noise energy resulting in a 3 dBA change in noise, which is the amount of change in noise necessary for the increase to be perceptible to the average healthy human ear.
1.3.3 Vibration Descriptors and Terminology
Vibration is measured in feet or inches (in). Acceleration is measured by comparing acceleration to that of the Earth’s gravity, and this unit is “G.” These units of acceleration or velocity are relative to time in seconds (sec) and are noted as in/sec2 for acceleration and in/sec for velocity. Displacement is not relative to time and is only shown as inches.
Vibration effects can be described by its peak and root mean square amplitudes. Building damage is often discussed in terms of peak velocity, or peak particle velocity (PPV). The PPV is defined as the maximum instantaneous positive or negative peak of the vibration signal. PPV is related to the stresses that are experienced by buildings; it is often used in monitoring of blasting vibration and to discuss construction vibration.
2.0 REGULATORY FRAMEWORK
2.1 STATE REGULATIONS
2.1.1 California Noise Control Act
The California Noise Control Act is a section within the California Health and Safety Code that describes excessive noise as a serious hazard to the public health and welfare and that exposure to certain levels of noise can result in physiological, psychological, and economic damage. It also finds that there is a continuous and increasing bombardment of noise in the urban, suburban, and rural areas. The California Noise Control Act declares that the State of California has a responsibility to protect the health and Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 6 welfare of its citizens by the control, prevention, and abatement of noise. It is the policy of the State to provide an environment for all Californians free from noise that jeopardizes their health or welfare.
2.1.2 California Noise Insulation Standards [California’s Title 24 Noise Standards, Cal. Adm. Code Title 24, Chap. 2-35]
In 1974, the California Commission on Housing and Community Development adopted noise insulation standards for multi-family residential buildings (California Code of Regulations Title 24, Part 2). Title 24 establishes standards for interior noise (attributable to outside noise sources) within habitable rooms.
Where standard building materials would not ensure compliance with this requirement, additional acoustical analysis is required. Such acoustical analysis must demonstrate that the residence has been designed to limit intruding noise to an interior noise level below 45 CNEL (or LDN).
2.1.3 California Environmental Quality Act
Under CEQA, lead agencies are directed to assess conformance to local or other agency noise standards; measure and identify the potentially significant exposure of people to (or generation of) excessive ground-borne vibration or noise levels; and measure and identify potentially significant permanent or temporary increases in ambient noise levels. Implementation of CEQA ensures that during the decision-making stage of development, decision-makers and the public will be informed of any potentially excessive noise levels and available mitigation measures to reduce them to acceptable levels.
2.1.4 Assembly Bill 1307
Assembly Bill 1307, approved on September 7, 2023, specifies that the effects of noise generated by project occupants and their guests on human beings is not a significant effect on the environment for residential projects for purposes of CEQA.
2.2 LOCAL REGULATIONS
2.2.1 City of Santee Municipal Code Noise Control Ordinance On-site generated noise is regulated by the City’s Municipal Code, Title 5 Health and Safety, Chapter
5.04 Noise Abatement and Control.
2.2.1.1 Section 5.04.040 General Noise Regulations
A. General Prohibitions. It is unlawful for any person to make, continue, or cause to be made or continued, within the limits of the City, any disturbing, excessive or offensive noise which causes discomfort or annoyance to reasonable persons of normal sensitivity residing in the area. The characteristics and conditions which should be considered in determining whether a violation of the provisions of this section exists, include, but are not limited to, the following:
1. The level of the noise;
2. Whether the nature of the noise is usual or unusual;
3. Whether the origin of the noise is natural or unnatural;
4. The level of the background noise;
Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 7 5. The proximity of the noise to sleeping facilities;
6. The nature and zoning of the area within which the noise emanates;
7. The density of the inhabitation of the area within which the noise emanates;
8. The time of day or night the noise occurs;
9. The duration of the noise;
10. Whether the noise is recurrent, intermittent, or constant; and
11. Whether the noise is produced by a commercial or noncommercial activity B. Disturbing, Excessive or Offensive Noises. The following acts, among others, are declared to be disturbing, excessive and offensive noises in violation of this section:
a. It is unlawful for any person to operate or allow the operation of any generator, air conditioning, refrigeration or heating equipment in such manner as to create a noise disturbance on the premises of any other occupied property, or if a condominium, apartment house, duplex, or attached business, within any adjoining unit. b. All generators, heating, air conditioning, or refrigeration equipment are subject to the setback and screening requirements in this code.
2.2.1.2 Section 5.04.070 Motorized Equipment
It is unlawful to operate any lawn mower, backpack blower, lawn edger, leaf blower, riding tractor, or any other machinery, equipment, or other device, or any hand tool which creates a loud, raucous or impulsive sound, within or adjacent to any residential zone between the hours of 10:00 p.m. and 7:00 a.m. of the following day.
2.2.1.3 Section 5.04.130 Loading and Unloading Operations It is unlawful for any person to engage in loading, unloading, opening, idling of trucks, closing or other handling of boxes, crates, containers, building materials, garbage cans, dumpsters or similar objects between the hours of 10:00 p.m. and 7:00 a.m. in such a manner as to cause a noise disturbance within or adjacent to a residential district.
2.2.1.4 Section 5.04.160 Limitations on sources of noise not otherwise addressed A. Between 10:00 p.m. and 7:00 a.m., it is unlawful for any person to generate any noise on the public way that is louder than average conversational level at a distance of 50 feet or more, vertically or horizontally, from the source.
B. Between 10:00 p.m. and 7:00 a.m., no person is permitted to generate any noise on any private open space that is louder than average conversational level at a distance of 50 feet or more, measured from the property line of the property from which the noise is being generated.
The Noise Abatement and Control Ordinance establishes the City’s noise regulation, generally prohibits nuisance noise and states that it is unlawful for any person to make, continue, or cause to be made or continued within the City limits any disturbing, excessive, or offensive noise that causes discomfort or Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 8 annoyance to reasonable persons of normal sensitivity residing in the area (Municipal Code Section
5.04.040(A)).
Municipal Code Section 5.04.090, which specifically pertains to construction equipment, makes operation of any construction equipment outside the hours of 7:00 a.m. through 7:00 p.m., Monday through Saturday, except holidays, unlawful unless the operation is expressly approved by the Director of Development Services. Construction equipment with a manufacturer’s noise rating of 85 dBA Lmax or greater may only operate at a specific location for 10 consecutive workdays. If work involving such equipment would involve more than 10 consecutive workdays, a notice must be provided to all property owners and residents within 300 feet of the site no later than 10 days before the start of construction.
The notice must be approved by the City and describe the proposed project and the expected duration of work and provide a point of contact to resolve noise complaints.
2.2.2 City of Santee General Plan Noise Element
Objective 1.0. Control noise from sources adjacent to residential, institutional, and other noise sensitive receptors.
• Policy 1.1: The City shall support a coordinated program to protect and improve the acoustical environment of the City including development review for new public and private development and code compliance for existing development.
• Policy 1.2: The City shall utilize noise studies and noise contour maps when evaluating development proposals during the discretionary review process. • Policy 1.4: The City shall promote alternative sound attenuation measures rather than traditional wall barrier wherever feasible; these may include glass or polycarbonate walls, berms, landscaping, and the siting of noise-sensitive uses on a parcel away from the roadway or other noise source.
• Policy 1.5: The City shall review future projects with particular scrutiny regarding the reduction of unnecessary noise near noise-sensitive areas such as hospitals, schools, parks, etc.
Objective 2.0: Ensure that future developments will be constructed to minimize interior and exterior noise levels.
• Policy 2.1: The City shall adhere to planning guidelines and building codes which include noise control for the exterior and interior living space of all new residential developments within noise impacted areas.
• Policy 2.2: The City should require new development to mitigate noise impacts to existing uses resulting from new development when: 1) such development adds traffic to existing City streets that necessitates the widening of the street; and 2) the additional traffic generated by new development causes the noise standard or significance thresholds to be exceeded. • Policy 2.3: The City should not require new development to mitigate noise impacts to existing uses when new development only adds traffic already anticipated by the City’s General Plan to an existing street but does not necessitate widening of that street.
Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 9 The Noise Element also provides guidelines for determining acceptable and unacceptable community noise exposure limits for various land use categories (Table 2, Exterior Land Use/Noise Compatibility Guidelines). Normally acceptable noise levels are defined as satisfactory, based on the assumption that any buildings involved are of normal conventional construction, without any special noise insulation requirements. Conditionally acceptable noise levels indicate that new construction or development should be undertaken only after a detailed analysis of the noise reduction requirements is made and required noise insulation features have been included in the design. Conventional construction with closed windows and fresh air supply systems or air conditioning will normally suffice. The General Plan states that these compatibility guidelines are not prohibitive but should be used as a guide and a resource (City of Santee 2003).
Table 2
EXTERIOR LAND USE/NOISE COMPATIBILITY GUIDELINES
Land Use Category Community Noise Exposure (dBA CNEL)
55 60 65 70 75 80
Residential – Low-Density Singel Family Duplex, Mobile Homes Residential – Multiple Family
Transient Lodging – Motels, and Hotels
Schools, Libraries, Churches, Hospitals, and Nursing Homes1 Auditoriums, Concert Halls, Amphitheaters
Sports Arena, Outdoor Spectator Sports
Playgrounds, Neighborhood Parks
Golf Courses, Riding Stables, Water Recreation, Cemeteries Offices Buildings, Business Commercial, and Professional Industrial, Manufacturing, Utilities, Agriculture
Normally Acceptable – Specified land use is satisfactory, based upon the assumption that buildings involved are of normal conventional construction, without any special noise insulation requirements.
Conditionally Acceptable – New construction or development should be undertaken only after a detailed analysis of the noise reduction requirements is made and needed noise insulation features included in the design. Conventional construction, but with closed windows and fresh air supply systems or air conditioning will usually suffice.
Normally Unacceptable – New construction or development should be discouraged. If new construction or development does proceed, a detailed analysis of the noise reduction requirements must be made with noise insulation features included in the design.
Clearly Unacceptable - New construction or development clearly should not be undertaken. 1 Applies to noise sensitive areas which serve a significant function for the use which could be adversely affected by noise; such as, outside areas used primarily for instruction, meditation areas, rest and relaxation areas, and other areas where general peace and quiet are important.
The Noise Element further states that when new development may result in the exposure of existing or future noise-sensitive uses to noise levels in excess of 65 dB(A) Ldn, an acoustical study will be required.
If the acoustical study shows that the noise levels at any noise-sensitive area will exceed 65 dB(A) Ldn, the development should not be approved unless the following findings are made:
1. Modifications to the development have been, or will be made, which will reduce the exterior noise levels in noise-sensitive areas to 65 dB(A) Ldn or less, or
2. If, with current noise abatement technology, it is not feasible to reduce the exterior noise levels to 65 dB(A) Ldn or less, then modifications to the development have been, or will be made, which Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 10 reduce the exterior noise level to the maximum extent feasible and the interior noise level to 45 dB(A) Ldn or less. Particular attention shall be given to noise-sensitive spaces such as bedrooms.
3. For rooms in noise-sensitive areas which are occupied only for a part of the day (schools, libraries, or similar), the interior 1-hour average sound level during occupation, due to noise outside, should not exceed 45 dB(A) LEQ.
Further, noise impacts shall be considered significant if any of the following occur as a result of the project:
1. If, as a direct result of the project, noise levels for any existing or planned development will exceed the noise levels considered compatible for that use as identified in Table 2.
2. If, as a direct result of the proposed development, noise levels which already exceed the levels considered compatible for that use are increased by 3 dB or more.
Section 8.0, Implementation, of the Noise Element lists the following measures that may be incorporated into a proposed project as mitigation measures. The following measures are not always required, and mitigation is not limited to this list:
1. The use of site design techniques, such as the provision of buffers to increase distances between the noise source and receiver, siting of buildings and parking areas, and the careful siting of noise-sensitive outdoor features to minimize noise impacts.
2. Provision of berms, landscaping, and other sound barriers, without the exclusive use of walls (e.g., a combination of a small wall and a berm in concert with the overall streetscape in the area could be appropriate).
3. Insulation of buildings against noise, including thicker-than-standard glazing and mechanical ventilation.
4. Improvement of traffic circulation to “smooth” flow by such measures as interconnecting traffic signals.
5. Consideration of the use of innovative construction technologies and materials in constructing or reconstructing streets.
6. Setting of time limits on certain noisy activities.
7. Purchasing of demonstrably quiet equipment for City use.
3.0 ENVIRONMENTAL SETTING
3.1 EXISTING LAND USES
The TCSP and AEN areas contain a mixture of commercial, office, open space, residential, and institutional uses. Land uses surrounding the TCSP and AEN areas include commercial, open space, institutional and residential.
Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 11 3.2 NOISE-SENSITIVE AND VIBRATION-SENSITIVE LAND USES Noise-sensitive land uses (NSLUs) are land uses that may be subject to stress and/or interference from excessive noise, including residences, hospitals, schools, hotels, resorts, libraries, sensitive wildlife habitat, or similar facilities where quiet is an important attribute of the environment. Noise receptors are individual locations that may be affected by noise. NSLUs in the TCSP and AEN areas include residences and open space.
Land uses in which ground-borne vibration could potentially interfere with operations or equipment, such as research, manufacturing, hospitals, and university research operations (Federal Transit Administration [FTA] 2018) are considered “vibration-sensitive.” The degree of sensitivity depends on the specific equipment that would be affected by the ground-borne vibration. In addition, excessive levels of ground-borne vibration of either a regular or an intermittent nature can result in annoyance to land uses where people sleep, such as residences, hotels, hospitals, and dormitories. Vibration-sensitive uses include residences throughout the TCSP and AEN.
3.3 AMBIENT NOISE SURVEY
A community noise survey was conducted to document noise levels throughout the TCSP and AEN areas.
Short-term daytime measurements at nine locations were selected to be representative of typical conditions in the planning area. The short-term measurements show the average sound level over roughly 15-minute periods on a weekday in July 2023. The locations were chosen based on land uses and proximity to nearby roadways. Noise measurement locations are shown on Figure 4, Ambient Noise Survey.
The community noise survey represents a range of the existing conditions and provides a representation of baseline conditions in the study area. The sources of noise varied between sites, but the primary noise generator in most locations is vehicular traffic.
The measured average noise levels ranged from 49.6 to 68.9 dBA LEQ. The loudest average noise level was 68.9 dBA LEQ. This measurement (M8) was located adjacent to Mission Gorge Road. Though these measurements provide a snapshot observation of the noise environment, noise can fluctuate widely throughout the day. Complete noise monitoring results are included in Table 3, Noise Monitoring Results. Individual site survey sheets can be found in Appendix A, Site Survey Measurement Sheets.
Table 3
NOISE MONITORING RESULTS
Site Location Time Measured Noise
Level (dBA LEQ)
M1 Town Center Park East 2:58 p.m.- 3:13 p.m. 50.2
M2 Cuyamaca Street, 790 feet
south of River Park Drive 9:03 a.m. - 9:18 a.m. 69.2
M3 Chubb Lane south of San Diego
River crossing 2:21 p.m. - 2:36 p.m. 49.6
M4
Riverview Parkway, 80 feet
south of San Diego Christian
College driveway
10:45 a.m. - 11:00 a.m. 54.0
Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 12 Site Location Time Measured Noise
Level (dBA LEQ)
M5 Santee Historical Society
Historic Barn 1:38 p.m. - 1:53 p.m. 54.5
M6 Trolley Square, 80 feet west of
tracks 9:43 a.m. - 9:58 a.m. 60.9
M7 Riverview Parkway, 250 feet
south of Town Center Parkway 11:18 a.m. - 11:33 p.m. 60.7 M8 Mission Gorge Road, 530 feet
east of Riverview Parkway 1:07 p.m. - 1:22 p.m. 68.9
M9 Mast Boulevard, 120 feet west
of Bilteer Court 3:40 pm. - 3:55 p.m. 66.9
Note: All site measurements taken on July 20, 2023.
4.0 ANALYSIS, METHODOLOGY, AND ASSUMPTIONS
4.1 METHODOLOGY
4.1.1 Ambient Noise Survey
The following equipment was used to measure existing noise levels at the project site:
• Larson Davis System LxT Integrating Sound Level Meters • Larson Davis Model CA250 Calibrator
• Windscreen and tripod for the sound level meter
The sound level meter was field-calibrated immediately prior to the noise measurements to ensure accuracy. All sound level measurements conducted and presented in this report were made with a sound level meter that conforms to the American National Standards Institute (ANSI) specifications for sound level meters (ANSI SI.4-1983 R2006). All instruments were maintained with National Institute of Standards and Technology traceable calibration per the manufacturers’ standards.
4.1.2 Noise Modeling Software
Modeling of the outdoor noise environment for this report used the TNM 2.5 software. The TNM was released in February 2004, by the U.S. Department of Transportation (USDOT), and calculates the daytime average Hourly LEQ from three-dimensional model inputs and traffic data (Caltrans 2004).
Peak-hour traffic volumes are estimated based on the assumption that approximately 10 percent of average daily trips (ADT) would occur during a peak hour. The one-hour LEQ noise level is calculated utilizing peak-hour traffic. Peak hour LEQ can be converted to CNEL using the following equation, where LEQ(h)pk is the peak hour LEQ, P is the peak hour volume percentage of the ADT, d and e are divisions of the daytime fraction of ADT to account for daytime and evening hours, and N is the nighttime fraction of ADT:
CNEL = LEQ(h)pk + 10log10 4.17/P + 10log10(d + 4.77e + 10N) 8 Ambient Noise Measurement Location
c::> Proposed Santee Town Center Specific Plan
Proposed Arts and Entertainment Neighborhood
o 750 Feet
-E---3----E---3----,1
Ambient Nosie Survey HELIX Environmental Planning ---------------------------------------------------------------------=------------FF~ig~u~r~e~4 Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 13 The model-calculated one-hour LEQ noise output is therefore approximately equal to the CNEL (Caltrans 2013).
Project construction noise was analyzed using the Roadway Construction Noise Model (RCNM; USDOT 2008), which utilizes estimates of sound levels from standard construction equipment.
4.2 ASSUMPTIONS
4.2.1 Operational Noise
Anticipated operational noise sources associated with implementation of the project would be similar to existing conditions. Noise sources would include typical community noise from residential and commercial activities.
4.2.2 Stationary Noise Sources
The TCSP area includes various stationary noise sources including industrial and commercial activities.
Noise levels from stationary sources are highly localized and may vary during the day based on the specific activity being performed, atmospheric conditions, and other factors. These noise sources can be continuous and may contain tonal components that may be annoying to people who live in the nearby vicinity. Stationary noise levels throughout the TCSP area may also vary due to different periods of activity depending on the time of day or day of the week.
Heating, Ventilation, and Air Conditioning Units
For the Housing Element sites, specific HVAC systems and locations have not been identified at this stage of project design. This analysis assumes that future residential buildings would use a typical to larger-sized residential condenser mounted on ground level or rooftop pads. The unit used in this analysis is a Carrier 38HDR060 split system condenser (see Appendix B, Carrier 38HDR060 Split System Condenser). The manufacturer’s noise data is provided below in Table 4, Carrier HDR060 Condenser Noise.
Table 4
CARRIER 38HDR060 CONDENSER NOISE
Noise Levels in Decibels1 (dB) Measured at Octave Frequencies Overall Noise Level in 125 Hz 250 Hz 500 Hz 1 KHz 2 KHz 4 KHz 8 KHz A-weighted Scale (dBA)1
63.0 61.5 64.0 66.5 66.0 64.5 55.5 72.0 1 Sound Power Levels (SWL) KHz = kilohertz
Outdoor Performances
An outdoor performance space may be located within the TCSP, north of the Town Center Transit Station, and may include gatherings of people for artistic, cinematic, theatrical, musical, sporting events, cultural, education or civic purposes. Exact locations of outdoor venues, designs, and associated events are not known at this stage. Noise levels associated with gathering areas may therefore vary substantially depending on the type of event, use of amplified equipment, and size of crowds.
Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 14 4.2.3 Vehicular Traffic Noise
Vehicles traveling along major roadways generate noise levels which affect adjacent land uses. Traffic noise generated on a roadway is dependent on vehicle speed, volume, flow, percentage of vehicle types, properly functioning muffler systems, and pavement type and conditions. Traffic noise is also dependent on the presence of barriers and the distance between the noise source and receptor. In general, as traffic volumes increase, noise levels increase. This condition exists until there is so much traffic that flow degrades, and speeds decrease which reduces noise levels. Furthermore, a heavy truck generates more noise than a car when travelling at the same speed and distance. Roads with the same amount of traffic can have higher or lower sound levels depending on the mixture of vehicles.
Future traffic volumes with and without implementation of the TCSP and Housing Element sites were provided by the traffic consultant for the project (Intersecting Metrics 2023). Modeling data used to develop the traffic contour maps is included in Appendix C, Existing and Future Traffic Noise Levels.
Within the TCSP area, major traffic noise generators are associated with Cuyamaca Street, Mast Boulevard, and Mission Gorge Road. The portions of the TCSP area affected by noise levels exceeding 65 CNEL are generally located adjacent to major roadways. Existing land uses in these areas include industrial, commercial, and open space.
4.2.4 Railway Noise
Existing rail traffic on existing tracks would continue to generate elevated noise levels within the TCSP area. These tracks are associated with the San Diego Trolley Green Line and terminate at the Santee Town Center station.
The San Diego Trolley’s light rail vehicles generate high, relatively brief, intermittent noise events. Atgrade crossings with warning bells are currently located at two locations within the Trolley Square shopping center and at the intersection of Mission Gorge Road and Cuyamaca Street. Light rail vehicles are equipped with horns for use in emergency situations and as a general audible warning to alert people in the vicinity of the tracks. Noise levels associated with the San Diego Trolley would not increase or decrease as a result of project implementation.
4.3 GUIDELINES FOR THE DETERMINATION OF SIGNIFICANCE AND
CONDITIONS OF APPROVAL
Implementation of the project would result in a significant adverse impact if it would exceed the following thresholds based on Appendix G of the CEQA Guidelines, as applicable to the project:
Threshold 1: Generate a substantial temporary or permanent increase in ambient noise levels in the vicinity of the project in excess of standards established in the Santee General Plan or noise ordinance.
Significant operational noise impacts would occur if implementation of the project would result in traffic noise exceeding the applicable land use compatibility level for a given use. For residential uses, this would be 65 CNEL. If noise levels exceed this threshold, a permanent increase in noise greater than a perceptible change (3 CNEL) over existing conditions would be considered significant.
Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 15 The City requires that noise levels generated during nighttime hours (10:00 p.m. to 7:00 a.m.) do not exceed the average conversational level at a distance of 50 feet. Normal conversation is approximately 60 dBA (Centers for Disease Control and Prevention 2024), therefore operational noise levels, including from HVAC units, would be considered significant if they exceed 60 dBA at nearby property lines.
Significant construction noise impacts would occur if implementation of the project would generate construction noise outside of the allowed construction hours specified in the Santee Municipal Code, which are between 7:00 a.m. and 7:00 p.m. Monday through Saturday, except holidays. In addition, construction equipment to assess potential noise impacts, construction noise measured at off-site NSLUs would be significant if it resulted in a perceived doubling of loudness, estimated to be an increase of 10 dBA above exterior ambient noise levels.
Threshold 2: Generate excessive ground-borne vibration or ground-borne noise levels.
Ground-borne vibration would be potentially significant if implementation of the project would result in ground-borne vibration which exceeds the “strongly perceptible” vibration annoyance potential criteria for human receptors of 0.1 inch per second PPV for nearby residences, or exceed the threshold for architectural damage potential criteria for buildings of 0.4 inch per second PPV, for continuous/frequent intermittent construction sources (such as impact pile drivers, vibratory pile drivers, and vibratory compaction equipment; Caltrans 2020).
Threshold 3: For a project located within the vicinity of a private airstrip or an airport land use plan, or where such a plan has not been adopted, within two miles of a public use airport or private airstrip, expose people residing or working in the project area to excessive noise.
A significant impact would occur if airport activity would expose the project land use to noise levels that exceed the City’s noise compatibility standard provided in Table 2 of this report for that use.
Threshold 4: Would the project conflict with the General Plan Noise Element standards for proposed uses?
Projects shall not expose new development to noise levels at exterior use areas or interior areas in excess of the noise compatibility guidelines established in the City’s General Plan Noise Element. The conditionally acceptable noise levels for project land uses are up to 70 CNEL for single-family and multifamily residential, 70 for playgrounds and neighborhood parks, and 75 CNEL for offices, and business commercial. For outdoor uses at a conditionally compatible land use, feasible noise mitigation techniques should be analyzed and incorporated to make the outdoor activities acceptable. For indoor uses at a conditionally compatible land use, exterior noise must be attenuated to 45 CNEL for single- and multi-family residential.
5.0 IMPACTS
5.1 ISSUE 1: EXCESSIVE NOISE LEVELS
Would the project generate a substantial temporary or permanent increase in ambient noise levels in the vicinity of the project in excess of standards established in the Santee General Plan or noise ordinance? Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 16 5.1.1 Construction Noise
Although typically short-term, construction can be a substantial source of noise. Implementation of the TCSP would generate construction noise as individual projects, such as the Housing Element sites, are approved and constructed. As shown in Table 5, Typical Construction Equipment Noise Levels, operation of typical construction equipment would have the potential to generate elevated noise levels for construction activities, depending on the type, duration, and location of the activity. These noise levels are presented at distances of 50 feet for reference.
Table 5
TYPICAL CONSTRUCTION EQUIPMENT NOISE LEVELS
Equipment
Typical Noise Level
(dBA at 50 feet
from source)
Air Compressor 73.7
Backhoe 73.6
Ground Compactor 76.2
Concrete Mixer Truck 74.8
Crane 72.6
Dozer 77.7
Grader 81.0
Jack Hammer 81.9
Front End Loader 75.1
Paver 74.2
Pumps 77.9
Roller 73.0
Scraper 79.6
Dump Truck 72.5
Source: U.S. Department of Transportation Roadway Construction Noise Model, 2008.
Construction activities related to implementation of the proposed TCSP would not take place all at once; however, future development accommodated by the proposed TCSP would have the potential to temporarily generate construction noise resulting in a short-term annoyance to nearby NSLUs. More specifically, construction noise levels would have the potential to increase ambient noise levels by 10 dBA, depending on the location and construction equipment used.
5.1.1.1 Housing Element Sites
For the Housing Element sites, NSLUs would be located at varying distances from future construction noise. Ambient noise levels vary at NSLUs depending on their proximity to existing noise sources (e.g.
Magnolia Avenue). Two measurements were taken at locations to approximate existing noise levels at NSLUs, including near Housing Element Site 16A at 54.0 dBA and near Housing Element Site 20B at 54.5 dBA.
Construction equipment would be traversing the entirety of each project site; construction noise may be closer or further from nearby NSLUs throughout a given construction day. For this analysis, the closest construction equipment to nearby NSLUs would be used at Housing Element Site 20B. Due to the size of the site and proximity to nearby residences, the average distance from the approximate center of the Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 17 construction site to nearby residences to the south would be an average distance of 250 feet. Noise levels modeled at 250 feet are shown in Table 6, Typical Construction Equipment Noise Levels – 250 Feet.
Table 6
TYPICAL CONSTRUCTION EQUIPMENTNOISE LEVELS – 250 FEET
Equipment
Typical Noise Level
(dBA at 250 feet
from source)
Air Compressor 59.7
Backhoe 59.6
Ground Compactor 62.3
Concrete Mixer Truck 60.8
Crane 58.6
Dozer 63.7
Grader 67.0
Jack Hammer 67.9
Front End Loader 61.2
Paver 60.2
Pumps 64.0
Roller 59.0
Scraper 65.6
Dump Truck 58.5
Source: U.S. Department of Transportation Roadway Construction Noise Model, 2008.
At 250 feet, construction noise levels would range from 58.5 dBA to 67.9 dBA, depending on the equipment in use. As described in Section 4.3, for the purposes of this analysis, a significant increase in noise would occur if construction noise levels exceed 10 dBA above ambient conditions at the time of project construction. At these distances, ambient noise levels ranging between 54.0 and 54.5 dBA may exceed 5 dBA at nearby residences.
5.1.2 Operational Noise
5.1.2.1 Stationary Noise
Similar to existing conditions, future development within the TCSP area would be subject to various stationary noise sources including noise from equipment and commercial activities. The City Municipal Code does not provide numerical standards for noise generated by individual uses but requires that HVAC uses do not create a noise disturbance at nearby occupied properties. In addition, noise generated during nighttime hours is not to exceed the average conversational level at a distance of 50 feet.
5.1.2.2 Housing Element Sites
For the Housing Element sites, specific planning data for the future HVAC systems and exact building site locations are not available; however, analysis using a typical to larger-sized residential condenser mounted on ground level pads provides a reasonable basis for analysis. HVAC units are anticipated to be located on project building rooftops or mounted on pads at distances greater than 25 feet from nearby property lines. As mentioned in Section 3.2.2, modeling assumed that the HVAC unit would be a Carrier 38HDR060 split system condenser. This unit typically generates a noise level of 56 dBA at a distance of Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 18 7 feet. If placed at a distance of 25 feet from nearby noise-sensitive land uses, a single HVAC would generate a noise level of approximately 45 dBA.
5.1.2.3 Traffic Noise
As noted in the assumptions, future traffic noise levels presented in this analysis are based on existing and future traffic volumes provided by Intersecting Metrics (2023). These future volumes include implementation of the TCSP and AEN and construction of the Housing Element sites. TNM software was used to calculate the noise contour distances for Existing and Future conditions for the 2050 horizon year. The off-site roadway modeling represents a conservative analysis that does not consider topography or attenuation provided by existing structures. The results of this analysis for the CNEL at 100 feet from the roadway centerline are shown below in Table 7, Traffic Noise Levels – 2050 Horizon Year. Additional analysis for the 75, 70, 65, and 60 CNEL distances are provided in Appendix C. Vehicular traffic noise level contours for the 2050 horizon year are depicted in Figure 5, Transportation Noise Contours (No Project) and Figure 6, Transportation Noise Contours (With Project). The noise levels are expressed in terms of CNEL. All noise contours depict the predicted noise level based on existing traffic volumes, and do not reflect attenuating effects of existing features such as noise barriers, buildings, topography, and dense vegetation.
A significant direct impact would occur if existing noise conditions approach or exceed the City significance thresholds for traffic noise for nearby land uses and the project more than doubles (increases by more than 3 CNEL) the existing noise level. Roadway noise increases associated with future development pursuant to the proposed TCSP, including the Housing Element sites, are shown in Table 6.
Table 7
TRAFFIC NOISE LEVELS – 2050 HORIZON YEAR
Roadway Segment
No Project
CNEL at 100
feet1,
With
Project
CNEL at
100 feet
Change
from
Existing
(CNEL)
Direct
Impact?1
Cottonwood Avenue
Street A to Riverview Parkway 57.5 57.5 +0 No
Park Avenue to Mission Gorge Road 50.7 50.7 +0 No
Mission Gorge Road to Buena Vista
Avenue 56.7 56.7 +0 No
Buena Vista Avenue to Prospect Avenue 56.7 56.7 +0 No
Cuyamaca Street
Woodglen Vista Road to El Nopal 62.9 62.4 -0.5 No
El Nopal to Mast Boulevard 63.4 63.4 +0 No
Mast Boulevard to Riverpark Drive 65.0 65.1 +0.1 No
Riverpark Drive to Town Center Parkway 65.8 65.9 +0.1 No Town Center Parkway to Mission Gorge
Road 65.5 65.8 +0.3 No
Mission Gorge Road to SR-52 Westbound
Ramps 67.7 67.8 +0.1 No
Magnolia Avenue
Mast Boulevard to Braverman Drive 64.9 65.2 +0.3 No
Braverman Drive to Mission Gorge Road 65.6 65.9 +0.3 No Mast Boulevard
Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 19 Roadway Segment
No Project
CNEL at 100
feet1,
With
Project
CNEL at
100 feet
Change
from
Existing
(CNEL)
Direct
Impact?1
Cuyamaca Street to Magnolia Avenue 65.8 65.8 +0 No
Magnolia Avenue to Los Ranchitos Road 60.3 60.3 +0 No
Mission Gorge Road
Carlton Hills Boulevard to Town Center
Parkway 67.2 67.5 +0.3 No
Town Center Parkway to Cuyamaca Street 66.5 66.7 +0.2 No Cuyamaca Street to Riverview Parkway 66.8 67.0 +0.2 No
Riverview Parkway to Cottonwood Avenue 66.8 67.0 +0.2 No Cottonwood Avenue to Magnolia Avenue 66.5 66.7 +0.2 No
Riverview Parkway
Mission Gorge Road to Town Center
Parkway 61.4 61.4 +0 No
Town Center Parkway to Cottonwood
Avenue 61.0 61.0 +0 No
Cottonwood Avenue to Magnolia Avenue 60.6 60.6 +0 No
Town Center Parkway
Mission Gorge Road to Cuyamaca Street 62.9 62.9 +0 No
Cuyamaca Street to Transit Way 59.1 59.4 +0.3 No
Transit Way to Riverview Parkway 59.3 59.4 +0.1 No
Source: USDOT 2004; Intersecting Metrics 2023 1 A direct impact to off-site uses would occur if the project would increase noise levels above the applicable threshold or, where the existing noise level exceeds the threshold, would increase noise levels by 3 CNEL.
CNEL = Community Noise Equivalent Level
When measured at 100 feet from a given roadway’s centerline, noise levels along some roadways may exceed 65 CNEL with or without implementation of the project. No roadway would increase by more than 0.3 CNEL, which would not be a perceptible change.
5.1.2.4 Outdoor Performances
The TCSP may include outdoor events and gatherings of people for artistic, cinematic, theatrical, musical, sporting, cultural, education or civic purposes. Design details for outdoor venues, designs, and associated events are not known at this stage; however potential locations may be located at sites throughout the TCSP. Noise levels associated with gathering areas may therefore vary significantly depending on the type of event, use of amplified equipment, and size of crowds.
5.1.3 Significance of Impacts
5.1.3.1 Construction Noise
Construction noise would be regulated by the City’s Municipal Code, which enforces hours and days of construction activities. However, for future development within the TCSP and for future Housing Element sites, noise levels may exceed 10 dBA above ambient conditions at nearby NSLUs. Therefore, it cannot be determined that construction noise would not significantly increase noise levels without mitigation. Impacts for construction noise through implementation of the TCSP and construction of the individual Housing Element areas are considered significant.
Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 20 5.1.3.2 Stationary Operational Noise
Operational noise would be regulated by the City’s Municipal Code, which does not provide numerical thresholds for noise generation, but states that noise generated by HVAC units do not create a noise disturbance on nearby occupied properties and that other operational noise does not exceed conversational levels. For the purposes of this analysis, conversational noise levels and noise disturbances are considered noise levels that exceed 60 dBA at nearby NSLUs. Because there is no numerical standard set by the City Municipal Code, adequate reduction of future projects’ noise levels are not guaranteed. Stationary operational noise is therefore considered significant.
5.1.3.3 Traffic Noise
Noise levels from traffic associated with implementation of the TCSP and Housing Element sites would increase by up to 0.3 CNEL. Noise level increases below 3 CNEL are not readily perceptible. Impacts from traffic noise due to implementation of the TCSP and AEN areas and construction of the Housing Element sites are less than significant.
5.1.3.4 Outdoor Performances
Similar to stationary operational noise, noise associated with outdoor performances would be regulated by the City’s Municipal Code, which does not provide numerical thresholds for noise generation. For the purposes of this analysis, conversational noise levels and noise disturbances are considered noise levels that exceed 60 dBA at nearby NSLUs. Because no set plans are available for outdoor performance areas, including site layouts or locations of potential noise-amplification equipment, impacts are considered significant without mitigation.
5.1.4 Mitigation Measures
5.1.4.1 Construction Noise
NOI-1 Construction Noise Management Plan. Noise levels from construction of future projects within the TCSP shall not exceed 10 dBA above the daytime baseline ambient noise levels as measured at nearby noise-sensitive land uses. To ensure the reduction of noise levels, a Construction Management Plan describing measures shall be included on future construction plans to ensure compliance with the aforementioned limits. The plans shall be prepared by future project applicants and submitted to the City for approval prior to issuance of a grading permit. The following measures may be included to reduce construction noise:
• Construction equipment to be properly outfitted and maintained with manufacturerrecommended noise-reduction devices. • Diesel equipment to be operated with closed engine doors and equipped with factoryrecommended mufflers. • Mobile or fixed “package” equipment (e.g., arc-welders and air compressors) to be equipped with shrouds and noise control features that are readily available for that type of equipment.
Santee Town Center Specific Plan EIR
c::> Proposed Santee Town Center Specific Plan
<§> Proposed Arts and Entertainment Neighborhood
Noise Contours
60 CNEL
65 CNEL
70CNEL
0 850 Feet
E---3 E---3 I
HELIX Transportation Noise Contours (No Project) Environmental Planning -------------------------------------------------------------------------------"-----------------------~-------;:F::-ig=-u::-r::-e----;:-5 0 Proposed Santee Town Center Specific Plan
<§) Proposed Arts and Entertainment Neighborhood
Noise Contours
60 CNEL
65 CNEL
70 CNEL
850 Feet
E---3 I
HELIX EnvironmentafPfanning ______________________________ _JT[l'ra~ns~p~o~r~ta~tti4io~n~N~o1i!is~e~C~o'_11ni!4to~u~r'!S_{(W~it~hl_JP~r~o~je~c:!lt) Figure 6
Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 21 • Electrically powered equipment to be used instead of pneumatic or internal combustion powered equipment, where feasible.
• Unnecessary idling of internal combustion engines (e.g., in excess of 5 minutes) to be prohibited.
• Material stockpiles and mobile equipment staging, parking, and maintenance areas to be located as far as practicable from noise sensitive receptors. • The use of noise-producing signals, including horns, whistles, alarms, and bells, shall be for safety warning purposes only.
• No project-related public address or music system shall be audible at any adjacent sensitive receptor.
• Temporary sound barriers or sound blankets may be installed between construction operations and adjacent noise-sensitive receptors. If barriers are to be used, the noise barrier should be constructed of a material with an STC 20 rating with no gaps or perforations and remain in place until the conclusion of demolition, grading, and construction activities.
• The project applicant shall notify residences within 100 feet of the project’s property line in writing within one week of any construction activity such as demolition, concrete sawing, asphalt removal, and/or heavy grading operations. The notification shall describe the activities anticipated, provide dates and hours, and provide contact information with a description of a complaint and response procedure. • The on-site construction supervisor shall have the responsibility and authority to receive and resolve noise complaints. A clear appeal process for the affected resident shall be established prior to construction commencement to allow for resolution of noise problems that cannot be immediately solved by the site supervisor.
5.1.4.2 Stationary Operational Noise
NOI-2 Operational Noise Reduction. Noise generated by standard operation of future projects within the TCSP shall not exceed 60 dBA when measured at nearby noise-sensitive land uses such as residences, schools, daycares, hospitals, or hotels. To ensure that noise levels are reduced to adequate levels, a site-specific noise study may be requested by the City for individual future projects, as deemed necessary by the City’s Planning Department. If noise levels are anticipated to exceed this limit, appropriate noise-attenuation features shall be installed to ensure noise levels are reduced.
5.1.4.3 Outdoor Performances
NOI-3 Performance Areas Noise Studies. When plans for future temporary or permanent performance spaces or entertainment activities are prepared, they shall be analyzed to ensure that noise levels generated by future events are reduced to 60 dBA at nearby noisesensitive land uses. For each proposed performance area or venue where noise levels could exceed this limit, a noise assessment shall be performed by a qualified noise consultant Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 22 which analyzes anticipated noise-generating sources. The study shall assess any noiseamplifying equipment, directionality of amplified noise, positioning of bandstands, and potential crowd noise. The analysis shall also consider the anticipated event types. If modeled noise levels exceed the limits, design considerations shall be provided to ensure noise levels are reduced. Noise attenuation features to be considered may include, but are not limited to, the following:
• Permanent barriers blocking the line-of-sight between the noise source and sensitive land use;
• Relocation of noise-generating equipment or areas where noise-generating activities may occur;
• Repositioning of noise-generating equipment facing away from sensitive uses; and • Enclosing event spaces within structures, as feasible.
The results of the study shall be incorporated into design plans and be approved by the City Planning Department.
5.1.5 Significance After Mitigation
Mitigation measure NOI-1 would apply to future projects within the TCSP and Housing Element sites.
Impacts related to construction noise would be reduced to less than significant levels. Mitigation measure NOI-2 would reduce impacts from future operational noise levels to less than significant levels.
Mitigation measure NOI-3 would reduce impacts from future outdoor performance venues; however, reducing noise levels to 60 dBA may not be achievable in every instance and impacts would be significant and unavoidable after incorporation of mitigation measure NOI-3.
5.2 ISSUE 2: EXCESSIVE VIBRATION
Would the project result in generation of excessive ground-borne vibration or ground-borne noise levels?
5.2.1 Construction Vibration
Construction activities are known to generate excessive ground-borne vibration. Construction activities related to implementation of the proposed TCSP and Housing Element sites would not take place all at once; however, future development accommodated by the proposed TCSP would have the potential to temporarily generate vibration resulting in a short-term effect on nearby vibration-sensitive land uses.
Sources of vibration during the construction of future projects within the proposed TCSP may include the potential for pile driving equipment and smaller equipment such as a vibratory roller. According to the Caltrans Transportation and Construction Vibration Guidance Manual, “strongly perceptible” ground-borne vibration is defined as equal to or exceeding 0.1 in/sec PPV. Construction activities within 200 feet and pile-driving within 600 feet of a vibration sensitive use would be potentially disruptive to vibration-sensitive operations (Caltrans 2013).
Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 23 5.2.1.1 Housing Element Sites
A possible source of vibration during construction of the Housing Element sites would be a vibratory roller, which may be used for compaction of soil beneath building foundations and could be used within 50 feet of off-site residences. Most usage of a vibratory roller, however, would occur at distances greater than 50 feet from any single residence due to the mobile nature of its use across the large project sites. A vibratory roller would create approximately 0.210 inch per second PPV at a distance of 25 feet (Caltrans 2020). A 0.210 inch per second PPV vibration level would equal 0.098 inch per second PPV at a distance of 50 feet.3 This would be lower than the “strongly perceptible” impact for humans of
0.1 inch per second PPV. Additionally, off-site exposure to such ground-borne vibration would be temporary as it would be limited to the short-term construction period.
5.2.2 Significance of Impacts
Impacts from future projects within the TCSP, excluding the Housing Element sites are not known and therefore are considered significant without mitigation. Construction of the Housing Element sites is anticipated to require the use of a vibratory roller and are not anticipated to be used within 50 feet of any nearby residences. At these distances, impacts would be less than significant.
5.2.2.1 Mitigation Measure
NOI-4 Construction Vibration Analysis. A site-specific vibration study shall be prepared for proposed land uses that have the potential for construction-related vibration impacts. Construction activities within 200 feet and pile-driving within 600 feet of a vibration-sensitive use could be potentially disruptive to vibration-sensitive operations. Proposed development shall implement recommended measures within the study to ensure that projects reduce construction-related vibration impacts to below 0.1 in/sec PPV at vibration-sensitive uses.
5.2.2.2 Significance of Impacts After Mitigation
Impacts would be less than significant with implementation of mitigation measure NOI-4. Impacts from construction of the Housing Element sites would be less than significant and do not require mitigation.
5.3 ISSUE 3: AIRPORT NOISE EXPOSURE
For a project located within an airport land use plan or, where such a plan has not been adopted, within two miles of a public airport or public use airport, would the project expose people residing or working in the project area to excessive noise levels?
5.3.1 Airport Noise
The TCSP area is subject to some aircraft noise associated with Gillespie Field, located approximately 0.5 miles to the south. The TCSP area is mostly located in locations that would be exposed to noise levels below 60 CNEL. Portions of the commercial areas north of Mission Gorge Road and west of Town Center Parkway are located within an area that would be exposed to 60 CNEL. The commercial uses within 3 Equipment PPV = Reference PPV * (25/D)n (inches per second), where Reference PPV is PPV at 25 feet, D is distance from equipment to the receiver in feet, and n = 1.1 (the value related to the attenuation rate through the ground); formula from Caltrans 2013.
Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 24 these areas would not exceed the land use compatibility standards described in the City General Plan Noise Element. Impacts would be less than significant.
5.3.1.1 Housing Element Sites
As described above, only commercial uses would be exposed to aircraft noise levels exceeding 60 CNEL.
Housing Element sites would not be located in these areas.
5.3.1.2 Significance of Impacts
Impacts would be less than significant.
5.3.1.3 Mitigation Framework
Impacts would be less than significant and no mitigation is required.
5.3.1.4 Significance After Mitigation
Impacts would be less than significant and no mitigation is required.
5.4 ISSUE 4: LAND USE COMPATIBILITY
Would the project conflict with the General Plan Community Protection Element noise standards for the proposed uses?
5.4.1 Exterior Noise Levels
Future noise levels in the TCSP area would generally increase or decrease in accordance with traffic levels. Following implementation of the proposed TCSP, traffic levels on roadway segments along Cuyamaca Street, Magnolia Avenue, Mission Gorge Road, and Town Center Parkway would increase. A segment of Cuyamaca Street from Woodglen Vista Road to El Nopal would see a decrease in traffic levels. The projected ADT for selected road segments, calculated CNEL at 100 feet from the centerline of each roadway, and the distance from the roadway centerline to the 60, 65, 70, and 75 CNEL contours are contained in Appendix C.
Land use designations which allow residential development are proposed throughout the TCSP area.
Some residential structures along major roadways, including Mast Boulevard and Magnolia Avenue, may be located within areas that are exposed to noise levels exceeding 65 CNEL. Although noise levels throughout the TCSP area would generally increase, nearby land uses generally would not be subjected to elevated noise levels incompatible with proposed land uses.
5.4.2 Interior Noise Levels
Title 24 regulations require that noise levels in habitable interior spaces for multi-family residential uses do not exceed 45 CNEL. Traditional architectural materials are estimated to attenuate noise levels by 20 CNEL; therefore, if exterior noise levels at future building façades exceed 65 CNEL, interior noise levels may exceed the 45 CNEL limit and further analysis is required.
Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 25 Traffic associated with implementation of the proposed TCSP would increase noise levels along a number of roadway segments throughout the TCSP area. Furthermore, the proposed TCSP would allow new residential development in areas where noise levels exceed 60 CNEL. As a result, additional noise attenuation would be required for new structures to achieve or maintain interior noise levels which would not exceed 45 CNEL for residences.
5.4.3 Consistency with City Standards
Implementation of the proposed TCSP would potentially expose new development to noise levels at exterior use areas in excess of the City’s noise compatibility guidelines established in the General Plan Noise Element, which would result in an inconsistency with City standards. In addition, new residential developments may be exposed to noise levels exceeding Title 24 standards.
5.4.4 Conditions of Approval
The following conditions of approval would be required to ensure project consistency with the General Plan Noise Element and Title 24 standards:
NOI-5: Site-Specific Acoustic Analysis. Where new development would expose people to noise exceeding normally acceptable levels, a site-specific acoustical analysis shall be performed prior to the approval of building permits for:
• Single-family and multi-family residences, mobile homes, transient lodging, schools, libraries, churches, hospitals, and nursing homes, where exterior noise levels range between 65 and 70 CNEL.
• All land uses where noise levels exceed the conditionally compatible exterior noise exposure levels as defined in the City’s General Plan Noise Element Exterior Land Use/Noise Compatibility Guidelines.
The acoustical analysis shall be conducted to ensure that barriers, building design and/or location are capable of maintaining interior noise levels at 45 CNEL or less for residences.
Barriers may include a combination of earthen berms, masonry block, and plexiglass. Building location may include the use of appropriate setbacks. Building design measures may include dual-pane windows, solid core exterior doors with perimeter weather stripping, and mechanical ventilation to allow windows and doors to remain closed.
5.4.5 Policy Consistency After Implementation of Conditions of Approval With the implementation of NOI-5, potential interior noise levels at noise-sensitive land uses would be consistent with City’s General Plan Noise Element standards.
6.0 LIST OF PREPARERS
Jason Runyan, Senior Noise Specialist
Joanne Dramko, AICP, Principal Noise Specialist, QA/QC
Yara Fisher, Project Manager
Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 26 HELIX Environmental Planning, Inc.
7578 El Cajon Boulevard
La Mesa, CA 91942
Noise Technical Report for the Santee Town Center Specific Plan Project | July 2024 27 7.0 REFERENCES
California Building Standards Commission. 2022. California Building Code, California Code of Regulations, Title 24, Part 2 (Volumes 1 & 2). Chapter 12.
California Department of Transportation (Caltrans). 2020. Transportation and Construction Vibration Guidance Manual. April.
2013. Technical Noise Supplement to the Traffic Noise Analysis Protocol. September. 2004. California Department of Transportation, Traffic Noise Model (TNM) Centers for Disease Control and Prevention. 2022. What Noises Cause Hearing Loss? November 8.
Available at: https://www.cdc.gov/nceh/hearing_loss/what_noises_cause_hearing_loss.html.
Federal Transit Administration (FTA). 2018. Transit Noise and Vibration Impact Assessment Manual.
September.
Intersecting Metrics. 2024. Local Transportation Study – Santee Town Center Specific Plan. March Santee, City of. 2003. City of Santee General Plan.
U.S. Department of Transportation (USDOT). 2008. Roadway Construction Noise Model. Version 1.1.
December 8.
Appendix A
Site Survey Measurement Sheets
Site Survey
Job # 0\"l'lrt.0000'1 00 \
Date: 1/iolu Site#: M\
Meter: L..l) Serial#: 000\"7'1 I Calibrator: l,.t) Serial #: 1.C,1.\ I
•-----+--_/1-1-----,.~-J------+------t---7· -- ./_,- ••.--+----- Sketch:
i
I
i
Cl
l I 1 !It(kle,~ l L I
i
.I.. I 1 1 1
I
J
I ,l
- ! - I ~ □ ----__,--=---1-~=:::
~ «:::~J ___,l ' ·I-------+---------+--,~--+-; _ ··_ ·_·-.,.:"_· _ _ - l I - j I -'A /1 , __
- 7~········~· ~ --+--~-+--+-·- -' I
) \.
Wind Spd: 'D mph Humidity:
Start of Measurement: 2,.: 1c)~ End of Measurement: o ·. \n Temp: '1 '1.. °F
8:) . 7,.. dBA LE
Cars (tally per 5 cars) Medium Trucks (MT) Heavy Trucks (HT) Noise Measurement for Information Only
No Through Roadwa~
No Calibration Analysis Will Be Provided '
-
1 Q
Site Survey
Date: '1/W/ Zo Site#: t\ 1. Engineer:Y~M n..11\d ~\'-''«I~ Meter: L,O Serial #: 000 \ 7"1 \ Calibrator: L.,,D Serial #: 2'1'1 Notes: ()nQJ_ ~N\~\L_y\~~ ~H,w O~'v\~ ~f\~ OM W\t.dk\1_W\_ _ _ t>JQ-~__£:\w o~~ci~ . 0~Q, 8~frucM.- ~\~Q,d _b~
~S_k_eoc_h_:_+l___~l____ ==~~--+--···· ·· ·· ··· --- ~-- I J ! l l ' ' I I
l
l
)
i
I ! l 1 I i I r I
Temp: i'"i o F Wind Spd: ~ mph Humidity:
Start of Measurement: q : Cl~~- End of Measurement: '\ ~ \Q Q'M Cars (tally per 5 cars) Medium Trucks (MT) Heavy Trucks (HT) ~oise Measur~ment for lnfo_!m_ation_ Only
No_T!1r~ugh Roadways
No Calibration Analysis Will Be Provided '
,
,.'
Site Survey
Job# O\l.\1,1.l'Y:X)O'l . 00\ Pro·ect Name:
Meter: t,t) Serial #: 000 \1"1 \ Calibrator: L\) Serial #: 2GZ I Notes: __N \lm'ou_ o-r ~~o..ti, ?\().n.t..,S •. 7
81'aU\)_()~ l-t.<tl)\Q. -~°'-\\(.,i,\'\i ~t,(l(' ~q,~U~-t (.. '60 .fQ4,+~~J__ Sketch:
I
- ~Cl n D· _j_ - -
- ------=-k:z-~----- d ------~~17('
-----LfJ I ._ ~r---
1 ] - -C\\u~b ~"
1 . ---~--
Wind S d: q
Start of Measurement: 1,; Z.I End of Measurement: 'Z- : ~ e, Cars ( tall er 5 cars)
~ oise M~asurement for Informa_tion Only
~ o Through Roadways
No Calibration Analysis Will Be Provided
Medium Trucks (MT) Trucks (HT)
/
---
Site Survey
Job# o\'-t11. oooa 'I .00\ Project Name: <&,.~-r ,Ci&V :-,..fl ..~•-' Date:i (UJ/1,o Site#: M"' Engineer: f<>.Y\o o.ad. &·~~~e.
Meter: wD Serial #: 000 \;~ l Calibrator: t,...t) Serial #: Z~ Z..I Notes:
I I Sketch: I I ! . - I
l
-• • • H•¥ ,__,..,....... -· ; ...
?tNr\(,""f-&-·-1---
----1-----t-----+· -·--·- -+-----!--·- --1---------
I I I
~,•......____ ----t----+---f--fl~-: 1:=::tt =.:·:t:: + ::::;.t-/ -r---i----r---- --i-----4----~ i ----
' I
I 'SuHcH~~ n
Wind Spd: '5 mph Humidity:
Start of Measurement: , () : ~ 'E, End of Measurement: \ l :0 0 Cars (tally per 5 cars) · ··- ---------- -------------· - ~-------------~----------------------------~---
oise Measurern~nt for Information Only
No Through Roadw~ys
No Calibration Analysis Will Be Provided
Medium Trucks (MT) Heavy Trucks (HT) ,.
' ',
,,>
, '
,
1 1
Site Survey
Job # Ol 'i'l1. O000'1 .CQ l
Date: 7 /7.0/z..._~ Site#:
Address: ol-0 60 '8'6-'61
' N
M6
"'
Project
• 6Q \\-Z .;
Na
" W
me: &1'~
Engineer
,c,~v ~
:Vo...~ ~V\d. ce,~"'~
A~-~~
Calibrator: Meter: {.;0 Serial#: 000 \1L\ \ t.,.:p Serial #: U 2-1 Notes: N""''o~ CJ~ -&~ ?\~: 1-
()t 'n~\~Vt'2.~ •, \ Nu
'°"t
Qo."" 'o~\)\~9\ ~~~ kt~
Sketch:
[\
·-- \
\
-
j '
"-1'-
I I
I
I
I I
l
Temp: C\LIOf- Wind Spd: C\ mph Humidity: 6Cf
- I • I ~~- ~~to":l~_ So.CA~~ ·-· I !
\\~~Q"t\t, i1>o..«\
I I I
I
I ......... . ~..... .
i~ J,i_ .... --~
• I
j
~
_
-
tl
-
%
Start of Measurement: t= oi End of Measurement: t: ~~ 'E'f.S dBA LEQ Cars (tally per 5 cars) Medium Trucks (MT) Heavy Trucks (HT) , ' ,' --,-----------~::::::::=:=---------- -.=----·--,.----- ------. ----- ' ~--~
'
, , ' ',
'.< ,'',
',' --- - -----· ----
' Noise Mea~ur~ment for Information Only
No Through Roadways -
No Calibration Analysis Will Be Provided ,
•
_ __
Site Survey
Job# 0\'it.1.0000'-t. 00 \
Date:7 /ZO t,"9 Site #: 6
w
Meter: t...O Serial#: 000\1'1 \ Serial#: 1-'1-z I
Notes: ~\N'f\~~ 0t ~\~ +to\\~ y~d ~(f ~ i.
-- N\J'N\'O«" o+ ~"'~ ~\o.~ • ~
Sketch:
Vt\\l~"~ l\l\ 'oo..o.,\L.V-0\lY\d. tt'a~ ~
,l
-~--=•·-:-::::::::: . ~1~~-~-:~~:~:---I-:~--_----t-;--_-- Tt--1·-·--, Q\OC Tern: u t" Wind S d: ~ m h Humidit :
Start of Measurement: End of Measurement: q:'oS Go. q dBA LEo Cars (tall er 5 cars) Medium Trucks (MT) Heav Trucks (HT) . ·~------------- -~-=.::::-------..-------··-• ~-=-------------- ---------------.,....,_
Noise Measurement for Information Only
No Thro'::!gh Roadw~ys
No Calibration Analysis Will Be Provided
Site Survey
Job# 0\'-1 '2.T.0000'-4. 00\
Meter: t..-'O Serial#: 000 \?t-11 Calibrator: L1) Serial #: U7,, I Sketch:
j
j
_ _______,I___----+-----+-----1-----+-----1f-----•
Temp: iq o~ Wind Spd: (o mph Humidity:
Start of Measurement: \\ : \~ o,~ End of Measurement: \\ •• 3'3 0.lq Cars (tally per 5 cars) Medium Trucks (MT) Heavy Trucks (HT) Noj~e Measurement f~ Inf~rl_!lation Only
No Jhrouih ~C?adw~ys
No Calibration Analysis Will Be Provided '
Site Survey
Job# 0\£1 "ZA ,0000'-t .OO\ Project Name: fu~u.1C'oV ~~W\ort\~ Meter: L-0 Serial#: 000 ff-I\ Calibrator: L,\) Serial #:%Z..I ~Otes:_ CQ\r WO.Sn \O~~-te<l ~f\)«l~\~-\-\~ _1.JcJJ -tee\' --- N \)~ '<>eK a,e. ~ "-"o...lL ~ \~ : ~
Mo.'f.~o\t. Q.0"'4-X o\r\-\',.t V"'()O..Q\ V\~o..~ ~ ~QJt"eir --
Sketch:
"-----+-I __ _..,....----1---- i -l:__-:_ ! -_ -_ -::_-::_{-::_-::_-::_-=-..-::._~!::_-=--::.-=-=-=±===== ; I l j I I
I
!
i
I
I
Temp: '1Li 0 f Wind Spd: ~ mph Humidity: 41 %
Start of Measurement: \:07-p...-. End of Measurement: \ ~ 'L"Z. -p"' . Cars (tally per 5 cars) Medium Trucks (MT) Heavy Trucks (HT) Noise Measurement for Information Only
_No Through Roadways
No Calibration Analysis Will Be Provided
Site Survey
Job# 0\Lt?..1 .0000Ll .00 \
Date: 1 /1..0I ~ Site#: 11 C\ Engineer: 'f('t..."'-l\ n~t\ 5~ Meter: C....:O Serial#: 000\1£.\ \ Calibrator: L,J) Serial#: 1.,"-Z J Sketch:
Temp: l\ \·aY' Wind Spd: <l, mph Humidity:
Start of Measurement: ~ ~ "fO t, ~ End of Measurement: ~: 70'6 \'>~ Cars (tally per 5 cars) Medium Trucks (MT) Heavy Trucks (HT) ~_ois~--~·1e'!_surement for Information Only
No Through Roadways
No Calibration Analysis Will Be Provided
Appendix B
Carrier 38HDR060 Split System
Condenser
- UNIT SIZE---VOLTAGE, SERIES REQUIRED SUBCOOLING _F(_C) 018 12 (6.7)
024 12 (6.7)
030 12 (6.7)
036 12 (6.7)
048 12 (6.7)
060 12 (6.7)
38HDR
ELECTRICAL DATA
38HDR VOLTAGE RANGE* COMPRESSOR OUTDOOR FAN MOTOR MIN FUSE/ UNIT
SIZE
V ---PH ---Hz
Min Max RLA LRA FLA NEC
Hp
kW
Out
CKT
AMPS
HACR BKR
AMPS
018 208/230 --- 1 --- 60 187 253 9.0 48.0 0.80 0.125 0.09 12.1 20 024 208/230 --- 1 --- 60 187 253 12.8 58.3 0.80 0.125 0.09 16.8 25 030 208/230 --- 1 --- 60 187 253 14.1 73.0 1.45 0.25 0.19 19.1 30 208/230 --- 1 --- 60 187 253 14.1 77.0 1.45 0.25 0.19 19.1 30 036 208/230 --- 3 --- 60 187 253 9.0 71.0 1.45 0.25 0.19 12.7 20 460 --- 3 --- 60 414 506 5.6 38.0 0.80 0.25 0.19 7.8 15 208/230 --- 1 --- 60 187 253 21.8 117.0 1.45 0.25 0.19 28.7 50 048 208/230 --- 3 --- 60 187 253 13.7 83.1 1.45 0.25 0.19 18.6 30 460 --- 3 --- 60 414 506 6.2 41.0 0.80 0.25 0.19 8.6 15 208/230 --- 1 --- 60 187 253 26.4 134.0 1.45 0.25 0.19 34.5 60 060 208/230 --- 3 --- 60 187 253 16.0 110.0 1.45 0.25 0.19 21.5 35 460 --- 3 --- 60 414 506 7.8 52.0 0.80 0.25 0.19 10.6 15 * Permissible limits of the voltage range at which the unit will operate satisfactorily FLA --- Full Load Amps
HACR --- Heating, Air Conditininng, Refrigeration
LRA --- Locked Rotor Amps
NEC --- National Electrical Code
RLA --- Rated Load Amps (compressor)
NOTE: Control circuit is 24 ---V on all units and requires external power source. Copper wire must be used from service disconnect to unit.
All motors/compressors contain internal overload protection.
SOUND LEVEL
Standard Typical Octave Band Spectrum ( dBA ) (without tone adjustment) Unit Size Rating (dB) 125 250 500 1000 2000 4000 8000 018 68 52.0 57.5 60.5 63.5 60.5 57.5 46.5
024 69 57.5 61.5 63.0 61.0 60.0 56.0 45.0
030 72 56.5 63.0 65.0 66.0 64.0 62.5 57.0
036 72 65.0 61.5 63.5 65.0 64.5 61.0 54.5
048 72 58.5 61.0 64.0 67.5 66.0 64.0 57.0
060 72 63.0 61.5 64.0 66.5 66.0 64.5 55.5
CHARGING SUBCOOLING (TXV-TYPE EXPANSION DEVICE)
6 Appendix C
Existing and Future Traffic Noise
Levels
Existing and Future Traffic Volumes
Roadway /Segment ADT
No Project (2050) With Project (2050)
Posted
Speed
(mph)
Peak
Hour
Traffic
Traffic Breakdown
ADT
Peak
Hour
Traffic
Traffic Breakdown
Cars
97.5%
MT
2.0%
HT
0.5%
Cars
97.5%
MT
2.0%
HT
0.5%
Cottonwood
Street A to Riverview Parkway 4800 480 468 10 2 4800 480 468 10 2 35 Park Ave to Mission Gorge Rd 2200 220 215 4 1 2200 220 215 4 1 25 Mission Gorge Rd to Buena Vista Ave 8500 850 829 17 4 8500 850 829 17 4 25 Buena Vista Ave to Prospect Ave 8700 870 848 17 4 8700 870 848 17 4 25 Cuyamaca Street
Woodglen Vista Rd to El Nopal 16500 1650 1609 33 8 14730 1473 1436 29 7 35 El Nopal to Mast Blvd 18630 1863 1816 37 9 18630 1863 1816 37 9 35 Mast Blvd to Riverpark Drive 26600 2660 2594 53 13 27510 2751 2682 55 14 35 Riverpark Drive to Town Center Pkwy 31700 3170 3091 63 16 32670 3267 3185 65 16 35 Town Center Pkwy to Mission Gorge Rd 30100 3010 2935 60 15 31640 3164 3085 63 16 35 Mission Gorge Rd to SR 52 WB 49600 4960 4836 99 25 50660 5066 4939 101 25 35 Magnolia Avenue
Mast Blvd to Braverman Dr 26200 2620 2555 52 13 27940 2794 2724 56 14 35 Braverman Dr to Mission Gorge Rd 30400 3040 2964 61 15 32450 3245 3164 65 16 35 Mast Blvd
Cuyamaca St to Magnolia Ave 22300 2230 2174 45 11 22400 2240 2184 45 11 40 Magnolia Ave to Los Ranchitos Rd 6300 630 614 13 3 6300 630 614 13 3 40 Mission Gorge Blvd
Carlton Hills Blvd to Town Center Pkwy 44400 4440 4329 89 22 46920 4692 4575 94 23 35 Town Center Pkwy to Cuyamaca St 37700 3770 3676 75 19 39700 3970 3871 79 20 35 Cuyamaca St to Riverview Pkwy 28200 2820 2750 56 14 29510 2951 2877 59 15 40 Riverview Pkwy to Cottonwood Ave 28400 2840 2769 57 14 29710 2971 2897 59 15 40 Cottonwood Ave to Magnolia Ave 26400 2640 2574 53 13 27710 2771 2702 55 14 40 Riverview Pkwy
Mission Gorge Rd to Town Center Pkwy 11600 1160 1131 23 6 11600 1160 1131 23 6 35 Town Center Pkwy to Cottonwood Ave 10700 1070 1043 21 5 10700 1070 1043 21 5 35 Cottonwood Ave to Magnolia Ave 9600 960 936 19 5 9600 960 936 19 5 35 Town Center Pkwy
Mission Gorge Rd to Cuyamaca St 16500 1650 1609 33 8 16500 1650 1609 33 8 35 Town Center Pkwy
Cuyamaca St to Transit Wy 6900 690 673 14 3 7300 730 712 15 4 35 Transit Wy to Riverview Pkwy 7200 720 702 14 4 7300 730 712 15 4 35 Existing and Future Traffic Noise Levels
Roadway/Segment
No Project (2050) With Project (2050)
CNEL
@ 100
ft
70 CNEL
(ft.)
65 CNEL
(ft.)
60 CNEL
(ft.)
CNEL @
100 ft
Δ at
100ft.
(dBA)
70 CNEL
(ft.)
65 CNEL
(ft.)
60 CNEL
(ft.)
Cottonwood
Street A to Riverview Parkway 57.5 - 20 60 57.5 0.0 - 20 60 Park Ave to Mission Gorge Rd 50.7 - - 12 50.7 0.0 - - 12 Mission Gorge Rd to Buena Vista Ave 56.7 - 15 50 56.7 0.0 - 15 50 Buena Vista Ave to Prospect Ave 56.7 - 15 50 56.7 0.0 - 15 50 Cuyamaca Street
Woodglen Vista Rd to El Nopal 62.9 25 65 170 62.4 -0.5 20 60 155 El Nopal to Mast Blvd 63.4 25 75 185 63.4 0.0 25 75 185 Mast Blvd to Riverpark Drive 65.0 35 100 240 65.1 0.1 37 105 250 Riverpark Drive to Town Center Pkwy 65.8 45 115 270 65.9 0.1 45 115 280 Town Center Pkwy to Mission Gorge Rd 65.5 40 110 260 65.8 0.3 45 115 280 Mission Gorge Rd to SR 52 WB 67.7 65 165 370 67.8 0.1 65 165 370 Magnolia Avenue
Mast Blvd to Braverman Dr 64.9 35 100 240 65.2 0.3 40 105 250 Braverman Dr to Mission Gorge Rd 65.6 40 110 250 65.9 0.3 45 115 280 Mast Blvd
Cuyamaca St to Magnolia Ave 65.8 45 115 270 65.8 0.0 45 115 270 Magnolia Ave to Los Ranchitos Rd 60.3 10 40 105 60.3 0.0 10 40 105 Mission Gorge Blvd
Carlton Hills Blvd to Town Center Pkwy 67.2 60 150 340 67.5 0.3 60 160 360 Town Center Pkwy to Cuyamaca St 66.5 50 130 310 66.7 0.2 50 135 320 Cuyamaca St to Riverview Pkwy 66.8 55 140 320 67.0 0.2 55 145 330 Riverview Pkwy to Cottonwood Ave 66.8 55 140 320 67.0 0.2 55 145 330 Cottonwood Ave to Magnolia Ave 66.5 50 130 310 66.7 0.2 55 140 310 Riverview Pkwy
Mission Gorge Rd to Town Center Pkwy 61.4 15 50 130 61.4 0.0 15 50 130 Town Center Pkwy to Cottonwood Ave 61.0 10 45 120 61.0 0.0 10 45 120 Cottonwood Ave to Magnolia Ave 60.6 10 40 110 60.6 0.0 10 40 110 Town Center Pkwy
Mission Gorge Rd to Cuyamaca St 62.9 20 65 170 62.9 0.0 20 65 170 Town Center Pkwy
Cuyamaca St to Transit Wy 59.1 - 30 85 59.4 0.3 - 33 90 Transit Wy to Riverview Pkwy 59.3 - 30 90 59.4 0.1 - 33 90 Appendix G
Construction and Operational Energy
Use Calculations
This page intentionally left blank
Construction Energy Use
Off-Road Construction Equipment Energy Use
Phase Equipment Fuel HP Load Factor
Equipment
Count Hours/Day Work Days
Gallons
/HP-Hr
Gallons
/Hour
Gallons
/Day
Total
Gallons Total kBtu
Site Preparation Rubber Tired Dozers Diesel 367 0.4 3 8.0 20 0.0453607 6.65895 159.815 3,196.3 444,285 Tractors/Loaders/Backhoes Diesel 84 0.37 4 8.0 20 0.0564883 1.75566 56.181 1,123.6 156,183 Grading Excavators Diesel 36 0.38 2 8.0 45 0.0560979 0.76742 12.279 552.5 76,803 Graders Diesel 148 0.41 1 8.0 45 0.0538288 3.26633 26.131 1,175.9 163,447 Rubber Tired Dozers Diesel 367 0.4 1 8.0 45 0.0453607 6.65895 53.272 2,397.2 333,214 Scrapers Diesel 423 0.48 2 8.0 45 0.0476817 9.68129 154.901 6,970.5 968,903 Tractors/Loaders/Backhoes Diesel 84 0.37 2 8.0 45 0.0564883 1.75566 28.090 1,264.1 175,706 Paving Pavers Diesel 81 0.42 2 8.0 35 0.0565364 1.92337 30.774 1,077.1 149,715 Paving Equipment Diesel 89 0.36 2 8.0 35 0.0595865 1.90915 30.546 1,069.1 148,608 Rollers Diesel 36 0.38 2 8.0 35 0.0578510 0.79140 12.662 443.2 61,603 Building Construction Cranes Diesel 367 0.29 2 4.4 375 0.0515293 5.48427 47.987 17,995.2 2,501,340 Forklifts Diesel 82 0.2 4 7.5 375 0.0573234 0.94010 28.203 10,576.2 1,470,087 Generator Sets Diesel 14 0.74 2 5.0 375 0.0177766 0.18417 1.842 690.6 95,997 Tractors/Loaders/Backhoes Diesel 84 0.37 4 6.6 375 0.0564883 1.75566 46.086 17,282.2 2,402,231 Welders Diesel 46 0.45 2 5.0 375 0.0258137 0.53434 5.343 2,003.8 278,527 Architectural Coating Air Compressors Diesel 37 0.48 1 6.0 162 0.0177766 0.31571 1.894 306.9 42,655 Project Construction Off-Road Total 68,124.5 9,469,304
On-Road Construction Energy Use
Phase Trip Type (Fleet Mix) Trips
Distance
(miles) Work Days Total VMT
Diesel
Gallons /
VMT
Diesel
Gallons
Gas Gallons /
VMT Gas Gallons
NG Gallons /
VMT NG Gallons kWh/VMT Total kWh Total kBtu
Site Preparation Worker (LDA, LDT1, LDT2) 17.5 11.97 20 4,190 8.56E-05 0 3.54E-02 148 0.00E+00 - 2.23E-02 93 18,739 Vendor (HHDT, MHDT) 1 7.63 20 153 1.37E-01 21 1.46E-02 2 5.69E-03 1 1.07E-02 2 3,313 Grading Worker (LDA, LDT1, LDT2) 20 11.97 45 10,773 8.56E-05 1 3.54E-02 381 0.00E+00 - 2.23E-02 240 48,185 Vendor (HHDT, MHDT) 1 7.63 45 343 1.37E-01 47 1.46E-02 5 5.69E-03 2 1.07E-02 4 7,455 Paving Worker (LDA, LDT1, LDT2) 15 11.97 35 6,284 8.56E-05 1 3.54E-02 222 0.00E+00 - 2.23E-02 140 28,108 Vendor (HHDT, MHDT) 2 7.63 35 534 1.37E-01 73 1.46E-02 8 5.69E-03 3 1.07E-02 6 11,597 Building Construction Worker (LDA, LDT1, LDT2) 1065.6 11.97 375 4,783,212 8.56E-05 409 3.54E-02 169,142 0.00E+00 - 2.23E-02 106,550 21,394,142 Vendor (HHDT, MHDT) 158.212 7.63 375 452,684 1.37E-01 62,121 1.46E-02 6,611 5.69E-03 2,576 1.07E-02 4,861 9,829,229 Architectural Coating Worker (LDA, LDT1, LDT2) 213.12 11.97 162 413,270 8.56E-05 35 3.54E-02 14,614 0.00E+00 - 2.23E-02 9,206 1,848,454 Project Construction On-Road Total 5,671,442 62,709 191,133 2,582 121,101 33,189,222 Construction Energy Summary
Diesel
Gallons Gas Gallons NG Gallons kWh kBtu
68,124 - - - 9,469,304
62,709 191,133 2,582 121,101 33,189,222
Project Construction Total 130,834 191,133 2,582 121,101 42,658,526 Source
Off-Road Construction Equipment
On-Road Construction Traffic
Notes:
1. Off-road equipment types and horsepower from CalEEMod defaults.
2. Off-road equipment count and hours from CalEEMod for the AQ/GHG report.
3. Off-road fuel consumption factors from CARB OFFROAD2021, for San Diego County, aggregate model years. https://arb.ca.gov/emfac/emissions-inventory/.
4. On-road fleet mix and trip distances from CalEEMod for the AQ/GHG report.
5. On-road fuel consumption factors weighted average for fleet mix from CARB EMFAC2021, for San Diego Cpounty, aggregate model years, aggregate speeds. https://arb.ca.gov/emfac/emissions-inventory/
6. 1 Gallon of diesel = 139 kBtu; 1 gallon of gasoline = 124 kBtu; 1 gallon of natural gas = 139kbtu; 1 kWhr = 3.412142 kBtu.
Annual Operational Energy Use
Project VMT
14,000,900
Project On-Road Project Operational Energy Use
Diesel Gallons
/ VMT Diesel Gallons
Gas Gallons /
VMT Gas Gallons
NG Gallons /
VMT NG Gallons kWh/VMT Total kWh Total kBtu
4.95E-03 69,365 3.66E-02 512,609 3.62E-04 5,075 2.13E-02 298,673 74,929,837 Project Electricity and Natural Gas
Type Source kWhr kBtu
Natural Gas Hot Water, Heating - 14,990,549
Electricity Buildings, Lighting 5,189,080 17,705,877
Total 5,189,080 32,696,426
Project Water and Wastewater Energy Use
Indoor (Mgal)
Outdoor
(Mgal)
Supply
(kWhr/Mgal)
Treat Water
(kWhr/Mgal)
Distribute
(kWhr/Mgal)
Treat
Wastewater kWhr kBtu
51.996951 2.684968072 9,727 111 1,272 1,911 706,882 2,411,983 Project Total
Energy Type Quantity kBtu
Gasoline (Gallons) 512,609 63,563,572
Diesel (Gallons) 69,365 9,641,721
Natural Gas (kBtu) 15,695,978 15,695,978
Electricity (kWhr) 6,194,635 21,136,974
Total 110,038,246
Notes:
1. VMT, electricity, natural gas, and water use from project CalEEMod annual output.
2. Fleet mix from CalEEMod default for San Diego County
3. Fuel consumption factors weighted average for fleet mix from CARB EMFAC2021, for San Diego County, aggregate model years for 2026, aggregate speeds.
4. Water electricity intensity factors from CalEEMod default for San Diego County.
5. 1 Gallon of diesel = 139 kBtu; 1 gallon of gasoline = 124 KBtu; 1 gallon of natural gas = 139 kbtu; 1 kWhr = 3.412142 kBtu.
Appendix H
Water Supply Assessment
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PADRE DAM MUNICIPAL WATER
DISTRICT
WATER SUPPLY ASSESSMENT
City of Santee Town Center Specific Plan Amendment
Prepared by:
HDR Engineering, Inc
July 2024
Padre Dam Municipal Water District
Water Supply Assessment
Town Center Specific Plan
Padre Dam Municipal Water District
Water Supply Assessment
July 2024
Town Center Specific Plan
Table of Contents
EXECUTIVE SUMMARY ...................................................................................................................1 SECTION 1 - PURPOSE ......................................................................................................................4 SECTION 2 - FINDINGS .....................................................................................................................5 SECTION 3 - PROJECT DESCRIPTION..........................................................................................7 SECTION 4 – PADRE DAM MUNICIPAL WATER DISTRICT .................................................10
4.1 Overview of Potable System Facilities .................................................................................. 11
4.2 Overview of Recycled System Facilities................................................................................13
4.3 Potential Groundwater Supplies ...........................................................................................13
4.4 Urban Water Management Plan ...........................................................................................14 SECTION 5 – HISTORICAL AND PROJECTED WATER DEMANDS.....................................16
5.1 Metropolitan WD 2020 Regional Urban Water Management Plan...................................16
5.2 San Diego County Water Authority Regional Water Supplies ..........................................18 SECTION 6 - EXISTING AND PROJECTED SUPPLIES.............................................................32
6.1 Demand Management (Water Conservation)......................................................................35
6.2 Projected Single Dry Year .....................................................................................................37
6.3 Projected Multiple Dry Year Supply and Demand .............................................................38 SECTION 7 – CONCLUSION: AVAILABILITY OF SUFFICIENT SUPPLIES........................ 40 Appendix A: Existing Land Use for Padre Dam MWD in 2020 WSA Appendix B: Existing Town Center Specific Plan Land Use Designations Appendix C: Proposed Town Center Specific Plan Land Use Designations Appendix D: Water Authority Accelerated Forecasted Growth Request Appendix E: City of Santee Request for Water Supply Assessment Padre Dam Metropolitan Water District
Water Supply Assessment
Town Center Specific Plan
Padre Dam Municipal Water District
Water Supply Assessment
June 2024
Town Center Specific Plan
Executive Summary
The Padre Dam Municipal Water District (Padre Dam MWD) solicited the professional engineering services of HDR Engineering, Inc. to prepare this Water Supply Assessment (WSA) at the request of the City of Santee (City) for the Town Center Specific Plan Amendment (TCSP) project, hereafter referred to as the Project. The Project is receiving a comprehensive update including updates to the Arts and Entertainment Neighborhood, and development of concept plans for four strategic Housing Element Sites. This WSA will document supply availability and potential impacts on water reliability.
Project Overview and Water Use
The Project area is a mixed use village consisting of 79 acres located in the central portion of the City of Santee’s Town Center Specific Plan. The Project is within the overall TCSP area that includes approximately 608 acres across several land uses and proposes a maximum anticipated development yield on certain properties:
• Arts and Entertainment (2,399,474 SF of non-residential buildings) • Four Housing Element Sites (1,480 dwelling units)
As shown on the Regional Map (Appendix A), the Project is bordered by Mast Boulevard to the north, State Route 67 to the east, Santee Lakes to the west, and State Route 52 to the south. The Project is currently located within the jurisdictions of Padre Dam MWD and the San Diego County Water Authority (Water Authority). The Project will be supplied water by Padre Dam MWD, which serves the City of Santee, and currently imports all of its potable water from the Water Authority primarily through a connection at Mission Gorge Road near Mission Trails Park and a connection located at Lake Jennings Treatment Plant. A third connection point is located south of Lake Jennings.
With the Project, the expected potable water demand is 745,695 gallons per day (gpd) or 835.3 acre feet per year (AFY), which is a 37,201 gpd or 42 AFY increase over the water demand for the Project included in the Padre Dam MWD 2020 Urban Water Management Plan (UWMP) (2020 UWMP). This increase accounts for changes the City of Santee made to zoning within the Specific Plan as part of their 2022 Housing Element update. 1 Padre Dam Metropolitan Water District
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Planned Imported Water Supplies from the Water Authority and Padre Dam MWD The San Diego County Water Authority (Water Authority) and Padre Dam MWD have an established process that ensures supplies are being planned to meet future growth. Any annexations and revisions to established land use plans are captured in the San Diego Association of Governments (SANDAG) updated forecasts for land use planning, demographics, and economic projections. SANDAG serves as the regional, intergovernmental planning agency that develops and provides forecast information. The Water Authority and Padre Dam MWD update their demand forecasts and supply needs based on the most recent SANDAG forecast approximately every five years to coincide with preparation of their UWMPs. Prior to the next forecast update, local jurisdictions may require water supply assessment and/or verification reports for proposed land developments that are not within the Padre Dam MWD, nor Water Authority, jurisdictions (i.e. pending or proposed annexations) or that have revised land use plans than what is reflected in the existing growth forecasts. The Padre Dam MWD and Water Authority next demand forecast and supply requirements and associated planning documents will capture any increase or decrease in demands and required supplies as a result of annexations or revised land use planning decisions such as the proposed revisions to the land use as represented in the Project. This WSA updated information will be incorporated within and become a permanent part of the water resources planning processes and documents for Padre Dam MWD and the Water Authority pending approval of the Project.
The California Urban Water Management Planning Act (Act), which is included in the California Water Code, requires all urban water suppliers within the state to prepare an UWMP and update it every five years. The purpose and importance of the UWMP has evolved since it was first required 25 years ago. State agencies and the public frequently use the document to determine if agencies are conducting adequate planning to reliably meet future demands. As such, UWMPs serve as an important element in documenting supply availability for the purpose of compliance with state laws, Senate Bills 610 and 221, linking water supply sufficiency to large land-use development approval. Agencies must also have a UWMP prepared, pursuant to the Act, in order to be eligible for state funding and drought assistance.
The Water Authority Act, Section 5 subdivision 11, states that the Water Authority “as far as practicable, shall provide each of its member agencies with adequate supplies of water to meet their expanding and increasing needs.”
As part of the preparation of a written water supply assessment report, an agency’s shortage contingency analysis should be considered in determining sufficiency of supply. Section 11 of the Water Authority’s 2020 UWMP contains a detailed shortage contingency analysis that addresses a regional catastrophic shortage situation and drought management. The analysis demonstrates that the Water Authority and its member agencies, through the Emergency Response Plan, Emergency Storage Project, and Drought Management Plan (DMP) are taking actions to prepare for and appropriately handle an interruption of water supplies. The DMP, adopted in May 2006, provides the Water Authority and its member agencies with a series of potential actions to take when faced with a shortage of imported water supplies from 2 Padre Dam Metropolitan Water District
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Metropolitan Water District of Southern California (Metropolitan WD) due to prolonged drought or other supply shortfall conditions. The actions will help the region avoid or minimize the impacts of shortages and ensure an equitable allocation of supplies.
Findings
The WSA identifies and describes the processes by which water demand projections for the proposed project will be fully included in the UMWP water demand and supply forecasts and other water resources planning documents of the Water Authority and Padre Dam MWD.
Water supplies necessary to serve the demands of the proposed project, along with existing and other projected future users, as well as the actions necessary and status to develop these supplies, have been identified in the Project WSA and will be included in the future water supply planning documents of the Water Authority and Padre Dam MWD. The potable water demand projections and supply requirements for previously adopted land uses are currently within the UWMP and other water resource planning documents of the Padre Dam MWD; however, portions of the Project were updated as part of the City of Santee 2022 Housing Element subsequent to the adoption of the Padre Dam MWD 2020 UWMP. The incremental water demand for the Project as a result of the TCSP Amendment will be accounted for under the Water Authority 2020 UWMP Accelerated Forecasted Growth (AFG) component. The purpose of the Accelerated Forecasted Growth component of the demand forecast is to estimate, on a regional basis, additional demand associated with proposed projects not yet included in local jurisdictions’ general plans and to plan for sufficient regional supplies to reliably meet the water demand of those projects. The Water Authority has available portions of the reserved Accelerated Forecasted Growth component of its planned water supply, which is incorporated into the Water Authority’s demand forecast at a regional level and thus available to all member agencies, to meet additional demand increments not previously identified.
This WSA includes, among other information, an identification of existing water supply entitlements, water rights, water service contracts, water supply projects, or agreements relevant to the identified water supply needs for the proposed Project. The WSA demonstrates and documents that sufficient water supplies are planned for and are intended to be available over a 20-year planning horizon, under normal conditions and in single and multiple dry years to meet the projected demand of the proposed project and the existing and other planned development projects to be served by the Padre Dam MWD.
Accordingly, after approval of the updated WSA for the Project by the Padre Dam MWD Board of Directors (Board), the WSA may be used to comply with the requirements of the legislation enacted by Senate Bills 610 and 221 as follows:
1. Senate Bill 610 Water Supply Assessment: The Padre Dam MWD Board approved WSA may be incorporated into the California Environmental Quality Act (CEQA) Environmental Impact Report (EIR) compliance process for the Project as a water supply assessment report consistent with the requirements of the legislation enacted by SB 610. The City of Santee as lead agency under CEQA for the Project EIR may cite 3 Padre Dam Metropolitan Water District
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the approved WSA as evidence that a sufficient water supply is planned for and is intended to be made available to serve the Project.
2. Senate Bill 221 Water Supply Verification: The Padre Dam MWD Board approved WSA may be incorporated into the City of Santee’s Tentative Map approval process for the Project as a water supply verification report, consistent with the requirements of the legislation enacted by SB 221. The City of Santee, within their process of approving the Project’s Tentative Map, may cite the approved WSA as verification of intended sufficient water supply to serve the Project.
Section 1 - Purpose
Water Code section 10910 et seq., commonly referred to as Senate Bill 610 (SB 610), requires the preparation of a WSA for certain new development projects. (See Water Code §§ 10910(a), 10912.) As stated in SB 610, the purpose of WSA is to determine whether the “total projected water supplies available during normal, single dry, and multiple dry water years during a 20-year projection will meet the projected water demand associated with the proposed project, in addition to the public water system’s existing and planned future uses, including agricultural and manufacturing uses.” Water Code section 10910 states that a “project,” as defined in Water Code section 10912 and subject to the California Environmental Quality Act (CEQA), requires the preparation of WSA. Under Water Code Section 10912(a)(7), the definition of a “project” includes one “…that would demand an amount of water equivalent to, or greater than, the amount of water required by a 500- dwelling unit project.” Because the Project exceeds the minimum threshold of 500 dwelling units, a WSA is required pursuant to Water Code section 10910(a).
The City of Santee has determined that the Project is subject to CEQA. As the lead agency under CEQA, the City of Santee has identified Padre Dam MWD as the public water system that will serve the Project pursuant to Water Code section 10910(b). The City of Santee has requested that Padre Dam MWD prepare a WSA for the Project in compliance with SB 610.
The Urban Water Management Planning Act, Water Code section 10610 et seq., requires urban water suppliers in California providing water for municipal purposes directly or indirectly to more than 3,000 customers or supplying more than 3,000 acre-feet of water annually to prepare and adopt an UWMP at least once every 5 years. Among other things, the UWMP evaluates current and future water supplies and demands within a supplier’s service area during normal, single-dry, and multiple-dry year periods over the next 20-year planning horizon and beyond, water supply reliability, water conservation measures, and water shortage contingency planning. Cities, counties, water districts, property owners, and developers utilize the UWMP for their long-range water supply planning, including the preparation of WSAs.
A UWMP is submitted to the California Department of Water Resources (DWR) for review to ensure requirements in the California Water Code have been addressed and acknowledged. 4 Padre Dam Metropolitan Water District
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The Padre Dam MWD’s 2020 UWMP was adopted June 2021 in accordance with the requirements of the Urban Water Management Planning Act. Notices of public hearing were submitted to DWR and cities and counties within the Padre Dam MWD’s service area, including the City of Santee, prior to the adoption of the UWMP.
The purpose of this WSA is to evaluate water supplies that are, or will be, available during normal, single dry year, and multiple dry years, during a 20-year projection, and determine if the available water supplies will meet the existing, projected, and future water demands served by the Padre Dam MWD, including the proposed Project. This WSA evaluates the availability of sufficient water supplies for the Project and does not constitute approval of the Project nor does it create a right or entitlement to water service or any specific level of water service. In addition, this WSA identifies existing water supply entitlements, water rights, water service contracts, and agreements relevant to serving the Project.
HDR prepared this WSA for Padre Dam MWD in compliance with SB 610.
Section 2 - Findings
Padre Dam MWD prepared a 2020 Comprehensive Facilities Master Plan (Master Plan) and Program Environmental Impact Report (PEIR) both of which were approved by the Padre Dam MWD Board in June 2022. The Master Plan developed a capital improvement plan to guide the Padre Dam MWD in the planning, development, and budgeting for water and recycled water system improvements that would be necessary to meet system performance criteria and support growth within the Padre Dam MWD through 2045 (Carollo 2020). The Master Plan included the Town Center Specific Plan (Specific Plan) with a potable water demand of 708,494 gpd, or 793.7 AFY, but was created prior to the revisions to the Town Center Specific Plan (2023). The Padre Dam MWD’s 2020 UWMP projected demands for potable and non-potable water (2020 UWMP Table 4-2) were based on the Master Plan and accounted for the potable demand of 793.7 AFY initially associated with the Project.
As described previously, the scope of the project has changed. The updated Project has a water demand of 835.3 AFY (an increase of 41.7 AFY) Because the scope of the project has changed, the 2020 UWMP does not consider the entirety of the Project, an SB 610 assessment is required under Water Code section 10910(c)(3). As such, this WSA will determine whether the Project can be supplied by the Padre Dam MWD’s total projected available water supplies under the normal, single dry year, and multiple dry water year scenarios, in addition to the Padre Dam MWD’s existing and planned future uses.
This WSA evaluates the demand associated with the Project and concludes that the demand can be satisfied through the amount associated with the Project in the 2020 UWMP along with additional water supplied by the Water Authority. Specifically, the Water Authority has confirmed that it can meet the Project demand not considered in the 2020 UWMP through the use of the Accelerated Forecasted Growth component of the Water Authority 2020 UWMP. 5 Padre Dam Metropolitan Water District
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Padre Dam MWD’s 2020 UWMP projects a total water demand by 2045 of 17,176 AFY (15,944 AFY potable and 1,232 AFY recycled). The Project water demand of 835.3 AFY accounts for approximately 4.8% of the Padre Dam MWD’s total water demand.
Table 1
Retail: Total Gross Water Use (Potable and Non-Potable)(1) (AFY) 2020 2025 2030 2035 2040 2045
Potable Water, Raw, Other
Non-potable(2)
9,588 12,442 13,586 14,623 15,473 15,944
Recycled Water Demand(3) 1,750 2,202 1,232 1,232 1,232 1,232 TOTAL WATER USE 11,338 14,644 14,818 15,855 16,705 17,176 (1) Table 4-3 in Padre Dam Municipal Water District 2020 UWMP. (2) From Table 4-1 and Table 4-2 in the Padre Dam Municipal Water District 2020 UWMP. (3) Recycled demand is the existing demand currently met by recycled water, as represented in Table 6-4 of the Padre Dam Municipal Water District 2020 UWMP. The recycled water system is not anticipated to grow, and the demands are expected to maintain the same from 2025 and beyond.
Source: Padre Dam Municipal Water District 2020 UWMP.
Available Potable Water Supplies
Padre Dam MWD imports 100 percent of its potable water supply from the Water Authority.
This potable water supply is imported from the California State Water Project (SWP) (North Bay, South Bay, and California Aqueducts) and the Colorado River (Los Angeles and Colorado River Aqueducts) by the Metropolitan WD.
In addition to water imported through Metropolitan WD, the Water Authority signed and amended an agreement (Water Authority-IID Water Conservation and Transfer Agreement) with the Imperial Irrigation District (IID) for long-term transfer of conserved Colorado River water to the County. The volume of transferred water is based on the transfer agreement with a fixed volume of 200,000 AF starting in 2023. The term of the agreement is 45 years with a provision to extend for an additional 30 years. As part of the QSA, the Water Authority also contracted for 77,700 AFY of conserved water that resulted by lining portions of the AllAmerican Canal (AAC) and Coachella Canal (CC), which reduced water loss.
In 2012, the Water Authority also entered into a formal Water Purchase Agreement with Poseidon Water to purchase desalinated ocean water at the Carlsbad Desalination Plant. As of May 2019, the Carlsbad Desalination plant received approval to increase capacity from 50 MGD to 60 MGD, an increase of 10 MGD or 11,000 AFY of additional potable supply not previously accounted for in the Water Authority 2020 UWMP. With this increase, the Water Authority will receive 61,600 AFY of water from the Carlsbad Desalination Plant which is a 10% increase from its original entitlement. The Water Authority 2020 UWMP projects that increase the Carlsbad Desalination Plant capacity could be placed into service prior to 2025. (Section 4.5.)
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These sources will enhance the Water Authority’s supply diversification during the single and multiple dry years where a deficit was previously anticipated for a single dry year beginning in 2035 and in multiple dry years beginning in 2028 in the Water Authority 2020 UWMP.
Additionally, according to the Water Authority’s 2018 Annual Report, the Water Authority has lowered its long-term regional water use projections due to sustained water use efficiency throughout the region, resulting in an interim demand forecast reduction of approximately 60,000 acre-feet for the entire 2025-2045 planning horizon in comparison with 2020 UWMP. (Water Authority 2018 Annual Report, Diversification & Conservation, Demand Forecast Declines Due to Regional Efficiencies.) Due to Accelerated Forecasted Growth availability, the Water Authority and thus Padre Dam MWD, can supply the demand associated with the Project. The water demand for most of the Project was accounted for in both the 2020 UWMP and the Water Authority UWMP, and the Water Authority has confirmed that it can meet the additional 41.81 AFY associated with the Project through the use of Accelerated Forecasted Growth. (See request by Padre Dam MWD and the Water Authority’s response attached as Appendix A.)
Although not a necessary supply source to serve the Project, Padre Dam MWD is planning to further enhance its potable water supply and reliability by implementing the ECAWP to reduce the area’s reliance on imported water from the Water Authority. Implementation of the ECAWP, discussed in Section 7.5 of the 2020 UWMP, will potentially offset a portion of imported supplies by the end of 2025. Sections 5, 6, and 7 of this WSA demonstrate that Padre Dam MWD has sufficient water capacity to supply the Project estimated total water demand.
This WSA confirms that the projected water demand for the Project falls within the water demand forecasts and available water supplies as described in the UWMPs prepared by (1) Metropolitan WD, (2) the Water Authority, which includes the Padre Dam MWD projected demands from its 2020 UWMP as well as forecasted growth in residential housing development, and (3) Padre Dam MWD; provided mitigation measures are employed in the dry years, and with Accelerated Forecasted Growth availability that has been specifically allocated to the Project to supply its previously unaccounted-for demand. Water supplies necessary to serve the Project and existing and future water demands within the Padre Dam MWD’s service area, as well as the actions necessary to develop or supplement supplies, have been identified in the water supply planning documents of the Padre Dam MWD, the Water Authority, and Metropolitan WD as referenced herein.
Section 3 - Project Description
Project Location
The Project site consists of approximately 79 acres in the central portion of the City of Santee (City) in eastern San Diego County. The City is about 18 miles east of downtown San Diego, it is bordered on the west and southwest by the City of San Diego, on the south by the City of El Cajon, on the north by San Diego County lands and on the east by Lakeside. The Town Center Specific Plan area is bounded by Mission Gorge Road and 3rd Street on the south side, 7 Padre Dam Metropolitan Water District
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by Magnolia Avenue and Cottonwood Avenue on the east, and by Mast Boulevard on the north. Additionally, the Project includes areas west of Cuyamaca Street.
TCSP Project
The Project is within the TCSP area that includes 79 acres of open space, parks, residential areas, offices, and commercial uses. The TCSP area is made up of different land uses including an Arts & Entertainment Overlay District and RiverView Office Park Area. The Arts and Entertainment Neighborhood incorporates various land use designations that support the use of art and culture, entertainment, commercial recreation, visitor, and civic uses. The RiverView Office Park Area provides for the development of a corporate office park and ancillary uses.
The Project includes updates to the Arts and Entertainment neighborhood and development of concept plans for four strategic Housing Element sites. The updates would allow development to occur in the Town Center Specific Plan area. While the development potentials are consistent with adopted plans and zoning approved in October 2022, some of the development was not anticipated in the 2020 UWMP. The City requested the following WSA in accordance with the California Public Resources Code section 15155 and Water Code sections 10910-10915.
The Project looks at a maximum yield for the buildout of Sites 15, 16A, 16B, 17, 18, 19, 20A, and 20B due to zoning changes made within the housing element update. The amended zoning designations and Mixed Use Overlay are compatible with the new land uses and the goal of the TCSP, which is to further the balance of development with conservation while creating opportunities for people to live, work, and play. The change of land designation allows the City of Santee to 1) provide a variety of housing types and sizes and a mixture of ownership and rental housing (Residential Goal) and 2) locates residential sites close to services, public transit and employment centers. These changes will also further the goal of the General Plan, to promote development of a well-balanced and functional mix of residential, commercial, open space, recreation, and civic uses that will create and maintain a high quality environment.
In addition, the TCSP is to be amended to add a density range of 30 to 36 dwelling units per gross acre to the R-30 land use designation, and a density range of 22 to 30 dwelling units per gross acre to the R-22 land use designation applicable to the Town Center properties along Park Avenue. This will allow greater flexibility for multifamily residential development and allow for consistency between the TCSP, Zoning Ordinance, and General Plan.
The proposed development concept for the Project is planned as a combination of land uses as shown in Table 2 which were updated with the 2022 housing element update. 8 Padre Dam Metropolitan Water District
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Table 2
Project Sites List
Site Map
ID#
APN Address/Description Lot Size
(Acres)
Former
Zoning
Updated
Zoning
15 381-040-36 Walmart 5.26 TC-C TC-R-22
16A 381-050-82 Civic Center Site I 11.11 TC-O/C TC-R-30 16B 381-05-082 Civic Center Site II 8.61 TC-O/C TC-R-14 17 381-051-18 Cottonwood Ave 22.15 TC-R-30 TC-R-14
18 381-051-17 Cottonwood Ave 11.71 TC-R-30 TC-R-14
19 3810-32-07 & -08 Park Center Dr 2.35 TC-R-22 TC-R-14 20A 381-050-81 9200 Magnolia Ave 7.75 TC-O/I TC-R-22
20B 381-050-81 9200 Magnolia Ave 10.00 TC-O/I TC-R-30
TOTAL 78.94
Water Demand
Following the adoption of the 2020 UWMP, the City of Santee updated its housing element which modified the land use within the Specific Plan area. This WSA utilizes information contained within the Specific Plan relating to projected population, number of residential units, and unit densities, coupled with the Padre Dam MWD water planning criteria, to determine the projected total water demand for the Project.
The Project reflects the rezoning from the 2022 Housing Element Update of 8 different lots with different demands, acreages, and general plan land uses, the breakdown of the zoning changes can be found in Table 2. The Specific Plan water demand is based on land use acreage and the corresponding water demand factor developed in the Padre Dam MWD’s 2020 Master Plan. Table 3 illustrates the revised water demand incorporating land use revisions from the Housing Element update. The total demand increases by 37,201 gpd, for a total Project demand of 745,695 gpd or 835.3 AFY.
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Table 3
Amended Project Water Demand
Land Use
Acreage
(ac) Water Demand
Factor (gpd/ac) (1)
Total
Demand
(gpd)
Commercial 312.01 1,500 468,015
High Residential 95.37 1,900 181,203
Medium Residential 0.85 1,200 1,020
None 0.55 0 0
Open Space 185.47 500 92,735
Public Land and
Facilities
13.61 200 2,722
TOTAL 607.86 745,695
(1) Water demand factors are based on recommendations for land use categories in the Padre Dam MWD 2020 Master Plan The 2020 UWMP projected potable water demand for the Project was 793.7 AFY. The revised projected water demand for the TCSP area is 835.3 AFY, which is more than the 793.7 AFY demand previously included within the 2020 UWMP.
Use of recycled water for the Project is available; however, the current planning stage of the Project does not identify specific areas for connection to the Padre Dam MWD recycled water system. For the purposes of this WSA, the Project water demands are assumed to be served by potable water supplies.
Section 4 – Padre Dam Municipal Water District
Padre Dam MWD is a municipal water district formed in 1976 when voters approved a merger with the Santee County Water District (Santee County WD), which was formed in 1956, with Rio San Diego Municipal Water District (Rio San Diego Municipal WD), which was formed in 1955. When voters approved the formation of the Rio San Diego Municipal WD it secure an entitlement to imported water from the Colorado River and provide water to the previously underdeveloped valley. The Padre Dam MWD is governed by an elected Board of Directors.
The Santee County WD was formed in 1956 under the County Water District Law of the State of California Water Code. In July 1969, the Board of Directors of Santee County WD and Rio San Diego Municipal WD combined management and engineering functions. On December 31, 1976 Rio San Diego Municipal WD took over Santee County WD and changed its name to Padre Dam MWD.
Padre Dam MWD provides water, wastewater, recycled water and park and recreation services to the residents of Santee, El Cajon, Lakeside, Flinn Springs, Harbison Canyon, Blossom Valley, Alpine, Dehesa and Crest. Padre Dam MWD imports 100% of their drinking 10 4.1
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water supply from the Water Authority and treat two million gallons per day of wastewater at the Ray Stoyer Water Recycling Facility.
Padre Dam MWD began recycling water in the late 1950s. The Ray Stoyer Recycling Facility received worldwide attention and was expanded to treat 2 MGD to provide water for Santee Lakes and for non-potable reuse to the community. Padre Dam is currently working on the East County Advanced Water Purification Project in conjunction with Helix Water District, the City of El Cajon and the County of San Diego. This project has the potential to produce up to 30%of East County’s drinking water. This water reuse opportunity would provide a supply of safe, reliable, local, and environmentally-friendly supply of drinking water within East County San Diego.
The potable water demands served by the Padre Dam MWD are residential, commercial, industrial, institutional, and irrigation. The total demand in 2020 was approximately 9,588 AFY. The per capita water demand was 93 gallons per capita per day in 2020, which is within the Water Conservation Bill of 2009 Senate Bill 7 as part of the Seventh Extraordinary Session (SBX 7-7) target of 142 gpcd by 2020 for the Padre Dam MWD by using hydraulic Region Target.
The development and/or acquisition of potential groundwater, recycled water market expansion, and seawater desalination supplies by Padre Dam MWD have evolved and are planned to occur in response to the regional water supply issues. These water supply projects are in addition to those identified as sustainable supplies in the current Water Authority and Metropolitan WD UWMP, IRP, Master Plans, and other planning documents. These new additional water supply projects are not currently developed and are in various stages of the planning process. These local and regional water supply projects will allow for less reliance upon imported water and are considered a new water supply resource for the Padre Dam MWD.
The supply forecasts contained within this WSA do consider development and/or acquisition of potential groundwater, recycled water market expansion, and seawater desalination supplies by Padre Dam MWD.
Overview of Potable System Facilities
Potable water supplied by Padre Dam MWD is 100 percent imported from the Water Authority. The water sources from the Water Authority include the Colorado River, BayDelta, seawater desalination, and some local supplies. Drinking water supplied by Padre Dam MWD continues to meet or exceeded all public health requirements enforced by the State Water Resources Control Board Division of Drinking Water and the United States Environmental Protection Agency.
Padre Dam MWD’s water system primarily consists of water storage facilities with a combined storage capacity of approximately 107.23 MG and 389 miles of transmission and distribution water mains. Pipelines within the Padre Dam MWD’s service area include a combination of asbestos cement pipe (ACP), polyvinyl chloride (PVC) and concrete cylinder 11 Padre Dam Metropolitan Water District
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pipe (CCP) with approximately 15 miles of pipeline dating back prior to 1950. Booster stations are distributed throughout Padre Dam MWD to pump water from lower pressure zones to higher pressure zones. The use of pressure reducing stations provide the ability to transfer water from higher to lower pressure zones to serve customers located in different pressure zones.
The availability of sufficient potable water supplies and plans for acquiring additional potable water supplies to serve existing and future demands of the Padre Dam MWD is founded upon the preceding discussions regarding Metropolitan WD’s and the Water Authority’s water supply resources and water supplies to be acquired by the Padre Dam MWD. Table 4 shows the projected water supply through 2045 with the addition of the AFG water supply. Table 2-8 of the Water Authority 2020 UWMP breaks down the projected water demand by member agency.
Table 4 – Retail: Water Supplies – Projected
Projected Water Supply
Water Supply Additional Detail on
Water Supply
2025 2030 2035 2040 2045
Reasonably Available Volume
Purchased or
Imported Water
In-District 6,054 7,198 8,235 9,085 9,556
Purchased or
Imported Water
Outside of District 2,388 2,388 2,388 2,388 2,388
Recycled Water 1,232 1,232 1,232 1,232 1,232
Potable Reuse East County AWP 4,000 4,000 4,000 4,000 4,000 Water Authority
AFG Increment
42 42 42 42 42
Total 13,716 14,860 15,897 16,747 17,218
Source: Padre Dam MWD 2020 Urban Water Management Plan – Table 6-9 with added AFG water.
The availability of sufficient imported and regional potable water supplies to serve existing and planned uses within Padre Dam MWD is demonstrated in the below discussion on Metropolitan WD and the Water Authority’s water supply reliability. The County Water Authority Act, Section 5 subdivision 11, states that the Water Authority “as far as practicable, shall provide each of its member agencies with adequate supplies of water to meet their expanding and increasing needs.” The Water Authority provides between 75 to 95 percent of the total supplies used by its 24 member agencies, depending on local weather and supply conditions.
The potable water infrastructure has been designed to facilitate and accommodate future water system expansion to serve projects and/or demands identified within the Padre Dam MWD Master Plan, UWMP, and other planning documents. The Project will be serviced by the construction of new water main connections to existing transmission mains located in North County San Diego. Details of the method of connection and proposed onsite water distribution system and new facilities for the Project are provided in Padre Dam MWD’s 2020 UWMP.
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4.2 Overview of Recycled System Facilities
Padre Dam MWD provides wastewater collection and treatment services to the City of Santee, portions of the County, and a small portion of El Cajon. Padre Dam MWD’s service area provides potable water to a population of 72,600 as of 2020. There are also areas of wastewater collection system that are within the Helix and Lakeside Water District service areas that are not served by the Padre Dam MWD.
The majority of the collected wastewater flows to the Padre Dam MWD’s Influent Pump Station. From there, up to 1,856 AFY of wastewater is pumped to the Padre Dam MWD’s Ray Stoyer WRF; the remaining flow is pumped to the City of San Diego’s Metropolitan Wastewater System where it receives advanced primary treatment at the Point Loma Wastewater Treatment Plant.
The County’s Lakeside interceptor runs through Padre Dam MWD’s sewer service area. The Padre Dam MWD has the capability to divert some County flows into Padre Dam MWD’s collection system, as well as to divert some of Padre Dam MWD’s flows to the County interceptor. The County flows are diverted to Padre Dam MWD during low flow periods of the night when Padre Dam MWD’s sewer flows drop below the capacity of the WRF. The diversions equalize influent to the WRF, thereby protecting the biological treatment processes as well as allowing the plant to meet night-time demand.
Recycled Water System Facilities
Padre Dam MWD has and continues to construct recycled water storage, pumping, transmission, and distribution facilities to meet projected recycled water market demands.
For nearly 20 years, millions of dollars of capital improvements have been constructed. The supply link consisting of a transmission main, storage reservoir, and a pump station to receive and transport the recycled water from the City of San Diego’s SBWRP are complete and recycled water deliveries began on May 18, 2007.
Cost and Financing
The capital improvement costs associated with the recycled water supply and distribution systems are financed through Padre Dam MWD water meter capacity fee and user rate structures. Padre Dam MWD recycled water sales revenue, along with Metropolitan WD and the Water Authority’s recycled water sales incentive programs are used to help offset the costs for the wholesale purchase and production of the recycled water supply, the operating and maintenance expenses, and the capital costs of the recycled water system facilities.
4.3 Potential Groundwater Supplies
Padre Dam MWD pumps a small amount of groundwater from the Santee Basin using a District-owned well that supplements the recycled water system. Since the well is unreliable, the groundwater supplies from the well are not available as a future supply and the Padre Dam MWD does not have any plans for groundwater supplies in the future. 13 4.4
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The Santee Basin aquifer is a groundwater basin within the City of Santee and the Padre Dam MWD’s service area. The Santee Basin aquifer is designated by DWR as a very low priority, unadjudicated groundwater basin.
The basin has multiple users but does not have a groundwater sustainability plan. The City of Santee is not part of the Groundwater Basin Groundwater Sustainability Agency (GSA), but serves as a voluntary participant on the GSA’s core team that assists the extent feasible in the development of a groundwater sustainability plan (GSP). To comply with the California Statewide Groundwater Elevation Monitoring Program requirements, a cooperative was formed from 2015 consisting of the Padre Dam MWD, Helix Water District, City of San Diego, and the Lakeside Water District to perform ground water elevation monitoring.
Urban Water Management Plan
In accordance with the California Urban Water Management Planning Act and recent legislation, the Padre Dam Municipal WD Board of Directors adopted an UWMP in June 2020. As required by law, Padre Dam MWD’s 2020 UWMP includes projected water supplies required to meet future demands through 2045. Specifically, the Padre Dam MWD 2020 UWMP is in accordance with Water Code section 10910 (c)(2) and Government Code section 66473.7 (c)(3).
The state Legislature passed Senate Bill 7 as part of the Seventh Extraordinary Session (SBX 7-7) on November 10, 2009, which became effective February 3, 2010. This new law was the water conservation component to the Delta legislation package and seeks to achieve a 20 percent statewide reduction in urban per capita water use in California by December 31, 2020. Specifically, SBX 7-7 from this Extraordinary Session requires each urban retail water supplier to develop urban water use targets to help meet the 20 percent reduction goal by 2020 (20x2020).
The SBX 7-7 target setting process includes the following: (1) baseline daily per capita water use; (2) urban water use target; (3) interim water use target; (4) compliance daily per capita water use, including technical bases and supporting data for those determinations. In order for an agency to meet its 2020 water use target, each agency can increase its use of recycled water to offset potable water use and also step up its water conservation measures. The required water use targets for 2020 were determined using one of four target methods.
Urban retail water suppliers reported interim compliance in their 2015 UWMP followed by actual compliance in the 2020 UWMP. Baseline, target, and compliance-year water use estimates are required to be reported in gallons per capita per day (gpcd).
Failure to meet adopted targets would result in the ineligibility of a water supplier to receive grants or loans administered by the State unless one (1) of two (2) exceptions is met.
Exception one (1) states a water supplier may be eligible if they have submitted a schedule, financing plan, and budget to DWR for approval to achieve the per capita water use reductions. Exception two (2) states a water supplier may be eligible if an entire water service area qualifies as a disadvantaged community.
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Although the Padre Dam MWD was able to meet the 2020 target goal, the year 2020 did not represent a typical year due to the impacts of the COVID-19 pandemic. Beginning March 19, 2020, Executive Order N-33-20 declared California in a state of emergency and ordered residents living in California to stay at home to prevent the spread of COVID-19. The increase in residents working from home resulted in an increase within the Padre Dam MWD’s service area when the initial lockdown started. Although, since the 2020 per capita demand of 93 gpcd was below the goal for 2020, adjustments for extraordinary events were not made.
Potable demands under normal conditions are anticipated to increase to 15,944 AFY by the year 2045. Padre Dam MWD water demand projections include approximately 2,388 AFY of demand outside the Padre Dam MWD’s existing service area boundary to serve the Viejas and Ewiiaapaayp tribes and parcel owners along the Interstate 8 beginning in 2025. The Water Authority supplies have been available at a consistent level and are projected to be similar in the future. Padre Dam MWD is also actively pursuing the East County Advanced Water Purification Program (AWP Project) to increase water supply reliability by improving regional self-reliance.
The highest projected demand that occurred in the single-dry year and multi-year scenario was 18,885 AFY in year 2045. Projected supplies are anticipated to meet demands. Padre Dam MWD will continue to monitor water supply shortages through new annual reporting by California Department of Water Resources (DWR).
Potable water supplied by Padre Dam MWD is 100% imported from the Water Authority.
The water sources from the Water Authority include the Colorado River, Bay-Delta, seawater desalination, and some local supplies. Drinking water supplied by Padre Dam MWD continues to meet or exceeded all public health requirements enforced by the State Water Control Board Division of Drinking Water and the United States Environmental Protection Agency.
Padre Dam MWD’s water system primarily consists of water storage facilities combined storage capacity of approximately 107.23 MG and 389 miles of transmission and distribution water mains. Pipelines within Padre Dam MWD’s service include a combination of asbestos cement pipe (ACP), polyvinyl chloride (PVC) and concrete cylinder pipe (CCP) with approximately 15 miles of pipelines. Booster stations are found throughout Padre Dam MWD to pump water from lower pressure zones to higher pressure zones. The use of pressure reducing stations provide the ability to transfer from higher to lower pressure zones to serve customers located in different pressure zones.
The potable water infrastructure has been designed to facilitate and accommodate future water system expansion to serve projects and demands identified by Padre Dam MWD’s Master Plan, UWMP, and other planning documents.
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Section 5 – Historical and Projected Water Demands
Padre Dam MWD currently does not have an independent raw or potable water supply source.
Padre Dam MWD is a member public agency of the Water Authority. The Water Authority is a member public agency of Metropolitan WD. The statutory relationships between the Water Authority and its member agencies, and Metropolitan WD and its member agencies, respectively, establish the scope of the Padre Dam MWD entitlement to water from these two agencies.
The Water Authority provides potable water to Padre Dam MWD through three connections.
The potable water supply is imported from the California State Water Project (SWP) and the Colorado River by Metropolitan WD. The Water Authority in turn, currently purchases the majority of its water from Metropolitan WD. Due to Padre Dam MWD reliance on these two agencies, this WSA Report includes referenced documents that contain information on the existing and projected supplies, supply programs, and related projects of the Water Authority and Metropolitan WD. The Padre Dam MWD, Water Authority, and Metropolitan WD are actively pursuing programs and projects to diversify their water supply resources.
The description of local recycled water supplies available to the Padre Dam MWD is also discussed below.
Metropolitan WD 2020 Regional Urban Water Management Plan In June 2021, Metropolitan WD adopted its 2020 Regional Urban Water Management Plan (RUWMP). The 2020 RUWMP provides MWD’s member agencies, retail water utilities, cities, and counties within its service area with, among other things, a detailed evaluation of the supplies necessary to meet future demands, and an evaluation of reasonable and practical efficient water uses, recycling, and conservation activities. During the preparation of the 2020 RUWMP, Metropolitan WD also utilized the current SANDAG regional growth forecast in calculating regional water demands for the Water Authority service area.
5.1.1 Availability of Sufficient Supplies and Plans for Acquiring Additional Supplies
Metropolitan WD is a wholesale supplier of water to its member public agencies and obtains its supplies from two primary sources: the Colorado River, via the Colorado River Aqueduct (CRA), which it owns and operates, and Northern California, via the State Water Project (SWP). The 2020 RUWMP documents the availability of these existing supplies and additional supplies necessary to meet future demands.
5.1.1.1 Metropolitan WD Supplies
Metropolitan WD’s Integrated Resources Plan (IRP) identifies a mix of resources (imported and local) that, when implemented, will provide 100 percent reliability for full-service demands through the attainment of regional targets set for conservation, local supplies, State 16 Padre Dam Metropolitan Water District
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Water Project supplies, Colorado River supplies, groundwater banking, and water transfers.
The 2020 update to the IRP (2020 IRP Update) includes a planning buffer supply intended to mitigate against the risks associated with implementation of local and imported supply programs. The planning buffer identifies an additional increment of water that could potentially be developed if other supplies are not implemented as planned. As part of implementation of the planning buffer, Metropolitan WD periodically evaluates supply development to ensure that the region is not under or over-developing supplies. Managed properly, the planning buffer will help ensure that the southern California region, including San Diego County, will have adequate supplies to meet future demands.
In June 2021, Metropolitan WD adopted its 2020 RUWMP in accordance with state law. The resource targets included in the preceding 2020 IRP Update serve as the foundation for the planning assumptions used in the 2020 RUWMP. Metropolitan WD’s 2020 RUWMP contains a water supply reliability assessment that includes a detailed evaluation of the supplies necessary to meet demands over a 25-year period in average, single dry year, and multiple dry year periods. As part of this process, Metropolitan WD also uses the current SANDAG regional growth forecast in calculating regional water demands for the Water Authority’s service area.
As stated in Metropolitan WD’s 2020 RUWMP, that plan may be used as a source document for meeting the requirements of SB 610 and SB 221 until the next scheduled update is completed in 2025. The 2020 RUWMP includes a “Justifications for Supply Projections” in Appendix A.3, that provides detailed documentation of the planning, legal, financial, and regulatory basis for including each source of supply in the plan. A copy of Metropolitan WD’s 2020 RUWMP can be found on the World Wide Web at the following site address:
2020-urban-water-management-plan-june-2021.pdf (mwdh2o.com) Water supply agencies throughout California continue to face climatological, environmental, legal, and other challenges that impact water source supply conditions, such as the court rulings regarding the Sacramento-San Joaquin Delta and the current western states drought conditions. Challenges such as these essentially always will be present. The regional water supply agencies, the Water Authority and Metropolitan WD, along with Padre Dam Metropolitan WD nevertheless fully intend to have sufficient, reliable supplies to serve demands.
5.1.2 Metropolitan WD Capital Investment Plan
As part of Metropolitan WD’s annual budget approval process, a Capital Investment Plan is prepared. The cost, purpose, justification, status, progress, etc. of Metropolitan WD’s infrastructure projects to deliver existing and future supplies are documented in the Capital Investment Plan. The financing of these projects is addressed as part of the annual budget approval process.
Metropolitan WD’s Capital Investment Plan includes a series of projects identified from Metropolitan WD studies of projected water needs, which, when considered along with operational demands on aging facilities and new water quality regulations, identify the capital 17 5.2
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projects needed to maintain infrastructure reliability and water quality standards, improve efficiency, and provide future cost savings. All projects within the Capital Investment Plan are evaluated against an objective set of criteria to ensure they are aligned with the Metropolitan WD’s goals of supply reliability and quality.
San Diego County Water Authority Regional Water Supplies The Water Authority has adopted plans and is taking specific actions to develop adequate water supplies to help meet existing and future water demands within the San Diego region.
This section contains details on the supplies being developed by the Water Authority. A summary of recent actions pertaining to development of these supplies includes:
• In accordance with the Urban Water Management Planning Act, the Water Authority adopted their 2020 UWMP in June 2021. The updated Water Authority 2020 UWMP identifies a diverse mix of local and imported water supplies to meet future demands.
A copy of the updated Water Authority 2020 UWMP can be found on the internet at sdcwa.org/wp-content/uploads/2021/08/2020-UWMP_Final-Print-Version-July-2021-
1.pdf
• Deliveries of conserved agricultural water from the Imperial Irrigation District (IID) to San Diego County have increased annually since 2003, with 70,000 ac-ft of deliveries in Fiscal Year (FY) 2020. These quantities will increase annually to 200,000 AFY by 2023, and then remain fixed for the duration of the transfer agreement. • As part of the October 2003 Quantification Settlement Agreement (QSA), the Water Authority was assigned Metropolitan WD’s rights to 77,700 AFY of conserved water from the All-American Canal (AAC) and Coachella Canal (CC) lining projects.
Deliveries of this conserved water from the CC reached the region in 2007 and deliveries from the AAC reached the region in 2020. Expected supplies from the canal lining projects are considered verifiable Water Authority supplies.
Through implementation of the Water Authority and member agency planned supply projects, along with reliable imported water supplies from Metropolitan WD, the region anticipates having adequate supplies to meet existing and future water demands.
To ensure sufficient supplies to meet projected growth in the San Diego region, the Water Authority uses the SANDAG most recent regional growth forecast in calculating regional water demands. The SANDAG regional growth forecast is based on the plans and policies of the land-use jurisdictions with San Diego County. The existing and future demands of the member agencies are included in the Water Authority’s projections.
5.2.1 Availability of Sufficient Supplies and Plans for Acquiring Additional Supplies
The Water Authority currently obtains imported supplies from Metropolitan WD, conserved water from the AAC and CC lining projects, and an increasing amount of conserved 18 Padre Dam Metropolitan Water District
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agricultural water from IID. Of the twenty-seven member agencies that purchase water supplies from Metropolitan WD, the Water Authority is Metropolitan WD’s largest customer.
Section 135 of Metropolitan WD’s Act defines the preferential right to water for each of its member agencies. Under preferential rights, Metropolitan WD could allocate water without regard to historic water purchases or dependence on Metropolitan WD. The Water Authority and its member agencies are taking measures to reduce dependence on Metropolitan WD through development of additional supplies and a water supply portfolio that would not be jeopardized by a preferential rights allocation. Metropolitan WD has stated, consistent with Section 4202 of its Administrative Code that it is prepared to provide the Water Authority’s service area with adequate supplies of water to meet expanding and increasing needs in the years ahead. When and as additional water resources are required to meet increasing needs, Metropolitan WD stated it will be prepared to deliver such supplies. In Section ES-5 of their 2020 RUWMP, Metropolitan WD states that Metropolitan WD has supply capacities that would be sufficient to meet expected demands from 2020 through 2045. Metropolitan WD has plans for supply implementation and continued development of a diversified resource mix including programs in the Colorado River Aqueduct, State Water Project, Central Valley Transfers, local resource projects, and in-region storage that enables the region to meet its water supply needs.
The Water Authority has made large investments in Metropolitan WD’s facilities and will continue to include imported supplies from Metropolitan WD in the future resource mix. As discussed in the Water Authority’s 2020 UWMP, the Water Authority and its member agencies are planning to diversify the San Diego regions supply portfolio and reduce purchases from Metropolitan WD.
As part of the Water Authority’s diversification efforts, the Water Authority is now taking delivery of conserved agricultural water from IID and water saved from the AAC and CC lining projects. The CC lining project is complete and the Water Authority has essentially completed construction of the AAC lining project. Table 5 summarizes the Water Authority’s supply sources with detailed information included in the sections to follow. Deliveries from Metropolitan WD are also included in Table 5, which is further discussed in Section 6.1 above. The Water Authority’s member agencies provided the verifiable local supply targets for groundwater, groundwater recovery, recycled water, and surface water, which are discussed in more detail in Section 5 of the Water Authority’s 2020 UWMP. 19 Padre Dam Metropolitan Water District
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Table 5
Single Dry-Year Supply and Demand Assessment in Five Year Increments (AFY) Water Supply Sources 2025 2030 2035 2040 2045
Water Authority Supplies
Metropolitan WD Supplies 336,232 336,674 337,116 337,558 338,000 Water Authority/IID Transfer 200,000 200,000 200,000 200,000 200,000 AAC and CC Lining Projects 78,700 78,700 78,700 78,700 78,700 Proposed Regional Seawater
Desalination 50,000 50,000 50,000 50,000 50,000
Member Agency Supplies
Surface Water 6,004 6,004 6,004 6,004 6,004
Water Recycling 41,963 45,513 45,628 45,749 45,854
Groundwater 15,281 15,281 15,281 15,281 15,281
Potable Reuse 33,042 53,202 112,562 112,562 112,562
San Luis Rey Water Transfers 15,800 15,800 15,800 15,800 15,800 Total Projected Supplies 777,022 801,174 861,091 861,654 862,201 Source: Water Authority 2020 Urban Water Management Plan – Table 9-2.
Section 5 of the Water Authority’s 2020 UWMP also includes a discussion on the local supply target for seawater desalination. Seawater desalination supplies represent a significant future local resource in the Water Authority’s service area.
The Carlsbad Desalination Plant is a seawater desalination plant and associated conveyance pipeline that was developed by Poseidon, a private investor-owned company that owns the plant. The Carlsbad Desalination Plant, located at the Encina Power Station in Carlsbad, began commercial operation on December 23, 2015, and provides a highly reliable local supply of up to 56,000 AFY for the region. In addition, there is the potential to increase annual average production capacity of the Carlsbad Desalination Plant to 61,600 AF as an adaptive management supply (subject to future supply conditions and future Board action).
The potential 5,600 AF increment of additional seawater desalination supply from the Carlsbad Desalination Plant could be placed into service prior to 2025. A 54-inch-diameter pipeline conveys product water from the Carlsbad Desalination Plant 10.5 miles east to the Water Authority’s Second Aqueduct. The water is then conveyed 5 miles north to the Water Authority’s Twin Oaks Valley WTP facility, where it is blended with treated imported water and subsequently distributed into the Water Authority’s existing aqueduct system.
The Water Authority’s existing and planned supplies from the IID transfer and canal lining projects are considered “drought-proof” supplies and should be available at the yields shown in Table 8 in normal water year supply and demand assessment. Single dry year and multiple dry year scenarios are discussed in more detail in Section 9 of the Water Authority’s 2020 UWMP.
As part of preparation of a written water supply assessment and/or verification report, an agency’s shortage contingency analysis should be considered in determining sufficiency of supply. Section 11 of the Water Authority’s 2020 UWMP contains a detailed shortage contingency analysis that addresses a regional catastrophic shortage situation and drought 20 Padre Dam Metropolitan Water District
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management. The analysis demonstrates that the Water Authority and its member agencies, through the Emergency Response Plan, Emergency Storage Project, and Drought Management Plan (DMP) are taking actions to prepare for and appropriately handle an interruption of water supplies. The DMP, adopted in May 2006, provides the Water Authority and its member agencies with a series of potential actions to take when faced with a shortage of imported water supplies from Metropolitan WD due to prolonged drought or other supply shortfall conditions. The actions will help the region avoid or minimize the impacts of shortages and ensure an equitable allocation of supplies throughout the San Diego region.
5.2.1.1 Water Authority-Imperial Irrigation District Water Conservation and Transfer Agreement
The QSA was signed in October 2003, and resolves long-standing disputes regarding priority and use of Colorado River water and creates a baseline for implementing water transfers.
With approval of the QSA, the Water Authority and IID were able to implement their Water Conservation and Transfer Agreement. This agreement not only provides reliability for the San Diego region, but also assists California in reducing its use of Colorado River water to its legal allocation.
On April 29, 1998, the Water Authority signed a historic agreement with IID for the longterm transfer of conserved Colorado River water to San Diego County. The Water AuthorityIID Water Conservation and Transfer Agreement (Transfer Agreement) is the largest agriculture-to-urban water transfer in United States history. Colorado River water will be conserved by Imperial Valley farmers who voluntarily participate in the program and then transferred to the Water Authority for use in San Diego County.
Implementation Status
On October 10, 2003, the Water Authority and IID executed an amendment to the original 1998 Transfer Agreement. This amendment modified certain aspects of the 1998 Agreement to be consistent with the terms and conditions of the QSA and related agreements. It also modified other aspects of the agreement to lessen the environmental impacts of the transfer of conserved water. The amendment was expressly contingent on the approval and implementation of the QSA, which was also executed on October 10, 2003.
On November 5, 2003, IID filed a complaint in Imperial County Superior Court seeking validation of 13 contracts associated with the Transfer Agreement and the QSA. Imperial County and various private parties filed additional suits in Superior Court, alleging violations of the California Environmental Quality Act (CEQA), the California Water Code, and other laws related to the approval of the QSA, the water transfer, and related agreements. The lawsuits were coordinated for trial. In January 2010, a California Superior Court judge ruled that the QSA and 11 related agreements were invalid because one of the agreements created an open-ended financial obligation for the State, in violation of California’s constitution. IID, Coachella Valley Water District, Metropolitan WD, the Water Authority, and state appealed this decision, and a stay of the trial court judgment was issued during the appeal. In December 2011, California’s Third District Court of Appeal reversed the lower court ruling that 21 Padre Dam Metropolitan Water District
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invalidated the Transfer Agreement and QSA. The appeals court remanded several issues to the trial court, including questions about whether the QSA was properly processed under CEQA. In July 2013, a Sacramento Superior Court judge entered a final judgment validating the QSA and rejecting all of the remaining legal challenges. The judge affirmed all of the contested actions, including the adequacy of the environmental documents prepared by IID. In May 2015, the state Court of Appeal issued a ruling that dismissed all remaining appeals.
Expected Supply
Deliveries into San Diego County from the transfer began in 2003 with an initial transfer of 10,000 AFY. The Water Authority received increasing amounts of transfer water each year, according to a water delivery schedule contained in the transfer agreement. In 2019, the Water Authority received 192,500 AF of water which includes 2,500 AF of early transfer water. The quantities will remain fixed at 200,000 AF for the duration of the Transfer Agreement. The term of the agreement is 45 years with a provision to extend for an additional 30 years.
During dry years, when water availability is low, the conserved water will be transferred under the IID Colorado River rights, which are among the most senior in the Lower Colorado River Basin. Without the protection of these rights, the Water Authority could suffer delivery cutbacks. In recognition for the value of such reliability, the 1998 contract required the Water Authority to pay a premium on transfer water under defined regional shortage circumstances.
The shortage premium period duration is the period of consecutive days during which any of the following exist: 1) a Water Authority shortage; 2) a shortage condition for the Lower Colorado River as declared by the Secretary; and 3) a Critical Year. Under terms of the October 2003 amendment, the shortage premium will not be included in the cost formula until Agreement Year 16.
Transportation
The Water Authority entered into a water exchange agreement with Metropolitan WD on October 10, 2003, to transport the Water Authority-IID transfer water from the Colorado River to San Diego County. Under the exchange agreement, Metropolitan WD will take delivery of the transfer water through its Colorado River Aqueduct. In exchange, Metropolitan WD will deliver to the Water Authority a like quantity and quality of water.
The Water Authority will pay Metropolitan WD’s applicable wheeling rate for each acre-foot of exchange water delivered. According to the water exchange agreement, Metropolitan WD will make delivery of the transfer water for 35 years, unless the Water Authority elects to extend the agreement another 10 years for a total of 45 years.
Cost/Financing
The costs associated with the transfer are financed through the Water Authority’s rates and charges. In the agreement between the Water Authority and IID, the price for the transfer water started at $258 per acre-feet and increased by a set amount for the first seven years. In December 2009, the Water Authority and IID executed a fifth amendment to the water transfer agreement that sets the price per acre-feet for transfer water for calendar years 2010 22 Padre Dam Metropolitan Water District
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through 2015, beginning at $405 per acre-feet in 2010 and increasing to $624 per acre-feet in 2015. For calendar years 2016 through 2034, the unit price will be adjusted using an agreedupon index. The amendment also required the Water Authority to pay IID $6 million at the end of calendar year 2009 and another $50 million on or before October 1, 2010, provided that a transfer stoppage is not in effect as a result of a court order in the QSA coordinated cases. Beginning in 2035, either the Water Authority or IID can, if certain criteria are met, elect a market rate price through a formula described in the water transfer agreement.
The October 2003 exchange agreement between Metropolitan WD and the Water Authority set the initial cost to transport the conserved water at $253 per acre-foot. Thereafter, the price is set to be equal to the charge or charges set by Metropolitan WD’s Board of Directors pursuant to applicable laws and regulation, and generally applicable to the conveyance of water by Metropolitan WD on behalf of its member agencies. The transportation charge in 2010 was $314 per acre-foot.
The Water Authority is providing $10 million to help offset potential socioeconomic impacts associated with temporary land fallowing. IID will credit the Water Authority for these funds during years 16 through 45. In 2007, the Water Authority prepaid IID an additional $10 million for future deliveries of water. IID will credit the Water Authority for this up-front payment during years 16 through 30.
As part of implementation of the QSA and water transfer, the Water Authority also entered into an environmental cost sharing agreement. Under this agreement the Water Authority is contributing a total of $64 million to fund environmental mitigation projects and the Salton Sea Restoration Fund.
Written Contracts or Other Proof
The supply and costs associated with the transfer are based primarily on the following documents:
Agreement for Transfer of Conserved Water by and between IID and the Water Authority (April 29, 1998). This Agreement provides for a market-based transaction in which the Water Authority would pay IID a unit price for agricultural water conserved by IID and transferred to the Water Authority.
Revised Fourth Amendment to Agreement between IID and the Water Authority for Transfer of Conserved Water (October 10, 2003). Consistent with the executed Quantification Settlement Agreement (QSA) and related agreements, the amendments restructure the agreement and modify it to minimize the environmental impacts of the transfer of conserved water to the Water Authority.
Amended and Restated Agreement between Metropolitan WD and Water Authority for the Exchange of Water (October 10, 2003). This agreement was executed pursuant to the QSA and provides for delivery of the transfer water to the Water Authority. 23 Padre Dam Metropolitan Water District
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Environmental Cost Sharing, Funding, and Habitat Conservation Plan Development Agreement among IID, Coachella Valley Water District (CVWD), and Water Authority (October 10, 2003). This Agreement provides for the specified allocation of QSA-related environmental review, mitigation, and litigation costs for the term of the QSA, and for development of a Habitat Conservation Plan.
Quantification Settlement Agreement Joint Powers Authority Creation and Funding Agreement (October 10, 2003). The purpose of this agreement is to create and fund the QSA Joint Powers Authority and to establish the limits of the funding obligation of CVWD, IID, and Water Authority for environmental mitigation and Salton Sea restoration pursuant to SB 654 (Machado).
Fifth Amendment to Agreement Between Imperial Irrigation District and San Diego County Water Authority for Transfer of Conserved Water (December 21, 2009). This agreement implements a settlement between the Water Authority and IID regarding the base contract price of transferred water.
Federal, State, and Local Permits/Approvals
Federal Endangered Species Act Permit. The U.S. Fish and Wildlife Service (USFWS) issued a Biological Opinion on January 12, 2001, that provides incidental take authorization and certain measures required to offset species impacts on the Colorado River regarding such actions.
State Water Resources Control Board (SWRCB) Petition. SWRCB adopted Water Rights Order 2002-0016 concerning IID and Water Authority’s amended joint petition for approval of a longterm transfer of conserved water from IID to the Water Authority and to change the point of diversion, place of use, and purpose of use under Permit 7643.
Environmental Impact Report (EIR) for Conservation and Transfer Agreement. As lead agency, IID certified the Final EIR for the Conservation and Transfer Agreement on June 28, 2002.
U. S. Fish and Wildlife Service Draft Biological Opinion and Incidental Take Statement on the Bureau of Reclamation's Voluntary Fish and Wildlife Conservation Measures and Associated Conservation Agreements with the California Water Agencies (12/18/02). The U. S. Fish and Wildlife Service issued the biological opinion/incidental take statement for water transfer activities involving the Bureau of Reclamation and associated with IID/other California water agencies' actions on listed species in the Imperial Valley and Salton Sea (per the June 28, 2002 EIR).
Addendum to EIR for Conservation and Transfer Agreement. IID as lead agency and Water Authority as responsible agency approved addendum to EIR in October 2003.
Environmental Impact Statement (EIS) for Conservation and Transfer Agreement. Bureau of Reclamation issued a Record of Decision on the EIS in October 2003.
CA Department of Fish and Game California Endangered Species Act Incidental Take Permit #2081-2003-024-006). The California Department of Fish and Game issued this permit 24 Padre Dam Metropolitan Water District
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(10/22/04) for potential take effects on state-listed/fully protected species associated with IID/other California water agencies' actions on listed species in the Imperial Valley and Salton Sea (per the June 28, 2002 EIR).
California Endangered Species Act (CESA) Permit. A CESA permit was issued by California Department of Fish and Game (CDFG) on April 4, 2005, providing incidental take authorization for potential species impacts on the Colorado River.
5.2.1.2 All-American Canal and Coachella Canal Lining Projects As part of the QSA and related contracts, the Water Authority was assigned Metropolitan WD’s rights to 77,700 AFY of conserved water from projects that will line the All-American Canal (AAC) and Coachella Canal (CC). The projects will reduce the loss of water that currently occurs through seepage, and the conserved water will be delivered to the Water Authority. This conserved water will provide the San Diego region with an additional 8.5 million acre-feet over the 110-year life of the agreement.
Implementation Status
The CC lining project constructed approximately 35 miles of parallel, concrete lined canal next to the original CC canal. Although construction completed in 2006, deliveries of conserved water to the Water Authority began in 2007. The AAC lining project constructed approximately 23 miles of parallel, concrete lined canal adjacent to the original AAC, which was completed in 2010 when deliveries of conserved water to the Water Authority began.
Expected Supply
The AAC lining project makes 67,700 acre-feet of Colorado River water per year available for allocation to the Water Authority and San Luis Rey Indian water rights settlement parties.
The CC lining project makes 26,000 acre-feet of Colorado River water each year available for allocation. The 2003 Allocation Agreement provides for 16,000 acre-feet per year of conserved canal lining water to be allocated to the San Luis Rey Indian Water Rights Settlement Parties. The remaining amount, 77,700 AFY, is to be available to the Water Authority which is a result of lining portions of the All-American Canal (AAC) and Coachella Canal (CC), ultimately reducing water loss. For planning purposes, the Water Authority assumes that 2,500 acre-feet of the 4,850 acre-feet will be available each year for delivery, for a total of 80,200 acre-feet per year of that supply. According to the Allocation Agreement, IID has call rights to a portion (5,000 AFY) of the conserved water upon termination of the QSA for the remainder of the 110 years of the Allocation Agreement and upon satisfying certain conditions. The term of the QSA is for up to 75 years.
Transportation
The October 10, 2003, Exchange Agreement between the Water Authority and Metropolitan WD also provides for the delivery of the conserved water from the canal lining projects. The Water Authority will pay Metropolitan WD’s applicable wheeling rate for each acre-foot of 25 Padre Dam Metropolitan Water District
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exchange water delivered. In the Agreement, Metropolitan WD will deliver the canal lining water for the term of the Allocation Agreement (110 years).
Cost/Financing
Under California Water Code section 12560 et seq., the Water Authority received $200 million in state funds for construction of the canal lining projects. In addition, $20 million was made available from Proposition 50 and $36 million from Proposition 84. The Water Authority was responsible for additional expenses above the funds provided by the state.
The rate to be paid to transport the canal lining water will be equal to the charge or charges set by Metropolitan WD’s Board of Directors pursuant to applicable law and regulation and generally applicable to the conveyance of water by Metropolitan WD on behalf of its member agencies.
In accordance with the Allocation Agreement, the Water Authority will also be responsible for a portion of the net additional Operation, Maintenance, and Repair (OM&R) costs for the lined canals. Any costs associated with the lining projects as proposed, are to be financed through the Water Authority’s rates and charges.
Written Contracts or Other Proof
The expected supply and costs associated with the lining projects are based primarily on the following documents:
U.S. Public Law 100-675 (1988). Authorized the Department of the Interior to reduce seepage from the existing earthen AAC and CC. The law provides that conserved water will be made available to specified California contracting water agencies according to established priorities.
California Department of Water Resources - Metropolitan WD Funding Agreement (2001).
Reimburse Metropolitan WD for project work necessary to construct the lining of the CC in an amount not to exceed $74 million. Modified by First Amendment (2004) to replace Metropolitan WD with the Authority. Modified by Second Amendment (2004) to increase funding amount to $83.65 million, with addition of funds from Proposition 50.
California Department of Water Resources - IID Funding Agreement (2001). Reimburse IID for project work necessary to construct a lined AAC in an amount not to exceed $126 million.
Metropolitan WD - CVWD Assignment and Delegation of Design Obligations Agreement (2002). Assigns design of the CC lining project to CVWD.
Metropolitan WD - CVWD Financial Arrangements Agreement for Design Obligations (2002).
Obligates Metropolitan WD to advance funds to CVWD to cover costs for CC lining project design and CVWD to invoice Metropolitan WD to permit the Department of Water Resources to be billed for work completed.
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Allocation Agreement among the United States of America, The Metropolitan Water District of Southern California, Coachella Valley Water District, Imperial Irrigation District, San Diego County Water Authority, the La Jolla, Pala, Pauma, Rincon, and San Pasqual Bands of Mission Indians, the San Luis Rey River Indian Water Authority, the City of Escondido, and Vista Irrigation District (October 10, 2003). This agreement includes assignment of Metropolitan WD’s rights and interest in delivery of 77,700 acre-feet of Colorado River water previously intended to be delivered to Metropolitan WD to the Water Authority. Allocates water from the AAC and CC lining projects for at least 110 years to the Water Authority, the San Luis Rey Indian Water Rights Settlement Parties, and IID, if it exercises its call rights.
Amended and Restated Agreement between Metropolitan WD and Water Authority for the Exchange of Water (October 10, 2003). This agreement was executed pursuant to the QSA and provides for delivery of the conserved canal lining water to the Water Authority.
Agreement between Metropolitan WD and Water Authority regarding Assignment of Agreements related to the AAC and CC Lining Projects. This agreement was executed in April 2004 and assigns Metropolitan WD's rights to the Water Authority for agreements that had been executed to facilitate funding and construction of the AAC and CC lining projects.
Assignment and Delegation of Construction Obligations for the Coachella Canal Lining Project under the Department of Water Resources Funding Agreement No. 4600001474 from the San Diego County Water Authority to the Coachella Valley Water District, dated September 8, 2004.
Agreement Regarding the Financial Arrangements between the San Diego County Water Authority and Coachella Valley Water District for the Construction Obligations for the Coachella Canal Lining Project, dated September 8, 2004.
Agreement No. 04-XX-30-W0429 Among the United States Bureau of Reclamation, the Coachella Valley Water District, and the San Diego County Water Authority for the Construction of the Coachella Canal Lining Project Pursuant to Title II of Public Law 100- 675, dated October 19, 2004.
California Water Code Section 12560 et seq. This Water Code Section provides for $200 million to be appropriated to the Department of Water Resources to help fund the canal lining projects in furtherance of implementing California’s Colorado River Water Use Plan.
California Water Code Section 79567. This Water Code Section identifies $20 million as available for appropriation by the California Legislature from the Water Security, Clean Drinking Water, Coastal, and Beach Protection Fund of 2002 (Proposition 50) to DWR for grants for canal lining and related projects necessary to reduce Colorado River water use.
According to the Allocation Agreement, it is the intention of the agencies that those funds will be available for use by the Water Authority, IID, or CVWD for the AAC and CC lining projects.
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California Public Resources Code Section 75050(b)(1). This section identifies up to $36 million as available for water conservation projects that implement the Allocation Agreement as defined in the Quantification Settlement Agreement.
Federal, State, and Local Permits/Approvals
AAC Lining Project Final EIS/EIR (March 1994). A final EIR/EIS analyzing the potential impacts of lining the AAC was completed by the Bureau of Reclamation (Reclamation) in March 1994. A Record of Decision was signed by Reclamation in July 1994, implementing the preferred alternative for lining the AAC. A re-examination and analysis of these environmental compliance documents by Reclamation in November 1999 determined that these documents continued to meet the requirements of the NEPA and the CEQA and would be valid in the future.
CC Lining Project Final EIS/EIR (April 2001). The final EIR/EIS for the CC lining project was completed in 2001. Reclamation signed the Record of Decision in April 2002. An amended Record of Decision has also been signed to take into account revisions to the project description.
Mitigation, Monitoring, and Reporting Program for Coachella Canal Lining Project, SCH #1990020408; prepared by Coachella Valley Water District, May 16, 2001.
Environmental Commitment Plan for the Coachella Canal Lining Project, approved by the US Bureau of Reclamation (Boulder City, NV) on March 4, 2003.
Environmental Commitment Plan and Addendum to the All-American Canal Lining Project EIS/EIR California State Clearinghouse Number SCH 90010472 (June 2004, prepared by IID).
Addendum to Final EIS/EIR and Amendment to Environmental Commitment Plan for the All-American Canal Lining Project (approved June 27, 2006, by IID Board of Directors).
5.2.1.3 Carlsbad Seawater Desalination Project
Development of seawater desalination in San Diego County will assist the region in diversifying its water resources, reduce dependence on imported supplies, and provide a new drought-proof, locally treated water supply. The Carlsbad Desalination Project is a fullypermitted seawater desalination plant and conveyance pipeline developed by Poseidon, a private investor–owned company that develops water and wastewater infrastructure. The Carlsbad Desalination Plant, located at the Encina Power Station in Carlsbad, began commercial operation on December 23, 2015, and provides a highly reliable local supply of up to 56,000 AFY for the region.
As a result of the forthcoming Encina Power Station decommissioning and termination of the once-through cooling water system and seawater intake pumps, the Carlsbad Desalination Plant is transitioning from co-located operations with the Encina Power Station to permanent stand-alone operations. Recent changes to the existing intake and discharge operations include a direct lagoon intake and fish-friendly pumps; it will also include future construction of new 28 Padre Dam Metropolitan Water District
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1 mm screens for seawater process water or brine dilution water. In addition, there is the potential to increase annual average production capacity of the Carlsbad Desalination Plant to 61,600 AF as an adaptive management supply (subject to future supply conditions and future Board action). The potential 5,600 AF increment of additional seawater desalination supply from the Carlsbad Desalination Plant could be placed into service prior to 2025.
Transportation
A 54-inch-diameter pipeline conveys product water from the Carlsbad Desalination Plant 10.5 miles east to the Water Authority’s Second Aqueduct. The water is then conveyed 5 miles north to the Water Authority’s Twin Oaks Valley WTP facility, where it is blended with treated imported water and subsequently distributed into the Water Authority’s existing aqueduct system.
Cost/Financing
The Water Purchase Agreement between the Water Authority and Poseidon provides the terms whereby the Water Authority purchases the entire output from the Carlsbad Desalination Plant at a price based on the cost of production. For contract year 2018-19, the price was $2,685 per AF (including conveyance pipeline debt service, Poseidon management fee, and temporary standalone operations period charges). The Water Authority’s water purchase costs are financed through Water Authority rates and charges.
Written Contracts or Other Proof
The expected supply and costs associated with the Carlsbad Desalination Project are based primarily on the following documents:
Development Agreement between City of Carlsbad and Poseidon (October 2009). A Development Agreement between Carlsbad and Poseidon was executed on October 5, 2009.
Agreement of Term Sheet between the Water Authority and Poseidon Resources (July 2010).
The Water Authority approved the Term Sheet at its July 2010 Board Meeting. The Term Sheet outlines the terms and conditions of a future Water Purchase Agreement with Poseidon and allocates the resources to prepare the draft Water Purchase Agreement.
Federal, State, and Local Permits/Approvals
Carlsbad Desalination Project Final EIR
The City of Carlsbad, acting as lead agency for Carlsbad Seawater Desalination Plant and appurtenant facilities proposed by Poseidon (the “Project”) prepared an Environmental Impact Report for the Project in compliance with the California Environmental Quality Act (“CEQA”), which the City of Carlsbad certified on June 13, 2006. http://www.sdcwa.org/rwfmp-peir
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The City of Carlsbad prepared an Addendum to the Carlsbad EIR (“Addendum”) which was adopted on September 15, 2009, and reflects minor and immaterial design modifications to the Project site plan, appurtenant facilities, and water delivery pipeline network.
The environmental documents and permits are found at the following link:
http://www.carlsbad-desal.com/EIR.asp
The Water Authority, as a Responsible Agency under CEQA, adopted a resolution on November 29, 2012 approving a Second Addendum to the Carlsbad Precise Development Plan and Desalination Plant Final EIR and First Addendum that evaluates the environmental impacts of several proposed facility modifications that are necessary to allow for operational flexibility and efficiency in receiving and delivering desalination product water. These modifications include: a realignment of a portion of the approved desalination pipeline, the addition of chemical injection at the approved San Marcos Aqueduct Connection site, the relining of a portion of Pipeline 3, the addition of a pipeline and expanded flow control facility at Twin Oaks Valley Water Treatment Plant and a replacement of the San Marcos Vent on Pipeline 4. Impacts associated with the proposed modifications would not result in a new significant impact or substantial increase in the severity of impacts previously evaluated in the Carlsbad FEIR or the First Addendum. There are no substantial changes to the circumstances under which the project will be undertaken, and no new information of substantial importance that was not known and could not have been known when the FEIR was certified and the First Addendum was approved, and that have since been identified.
Therefore, the Second Addendum satisfies the CEQA requirements for the proposed project modifications.
Regional Water Facilities Master Plan EIR
On November 20, 2003, the Water Authority Board of Directors adopted Resolution No. 2003-34 certifying the Final Program Environmental Impact Report (State Clearinghouse No. 2003021052) for the Water Authority’s Regional Water Facilities Master Plan Project (the “Master Plan EIR”), which evaluated, among other things, potential growth inducing impacts associated with new water supplies to the region including, but not limited to, up to 150 million gallons per day (“MGD”) of new supplies from seawater desalination. This certification included a 50 MGD plant located in the City of Carlsbad.
The environmental documents and permits are found at the following link:
http://www.sdcwa.org/rwfmp-peir
Sub regional Natural Community Conservation Plan/Habitat Conservation Plan (NCCP/HCP) On December 8, 2010, the Board adopted Resolution No. 2010-18 certifying a Final environmental Impact Report/Environmental Impact Statement for the San Diego County Water Authority Subregional Natural Community Conservation Plan/Habitat Conservation Plan (State Clearinghouse No. 2003121012) (the “Habitat Conservation Plan EIR/EIS”), which Plan was implemented on December 28, 201.
The environmental documents and permits are found at the following link:
http://www.sdcwa.org/nccp-hcp
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Twin Oaks Valley Water Treatment Plant EIR
On September 8, 2005, the Board adopted Resolution No. 2005-31 certifying a Final Environmental Impact Report for the Twin Oaks Valley Water Treatment Plant Project (State Clearinghouse No. 20040071034) (the “Twin Oaks EIR”), which project was constructed as a 100 MGD submerged membrane water treatment facility, including treated water holding tanks and distribution pipelines and other facilities, consistent with the conditions and mitigation measures included in the Twin Oaks EIR.
http://www.sdcwa.org/twin-oaks-valley-treatment-plant-final-eir 2010 Urban Water Management Plan
http://www.sdcwa.org/2010-urban-water-management-plan
Drinking Water Permit (October 2006). The California Department of Health Services approved the Conditional Drinking Water Permit on October 19, 2006.
Coastal Development Permit
The Project is fully permitted, with the California Coastal Commission issuing the following permits: Coastal Development Permit No. E-06-013, Energy Minimization and Greenhouse Gas Reduction Plan (December 2008), Marine Life Mitigation Plan (December 2008), Erosion Control Plan (November 2009), Landscaping Plan (September 2009), Lighting Plan (August 2009), Construction Plan (September 2009), and Water Pollution Control Plan (September 2009); the California Department of Public Health issuing Conceptual Approval Letter dated October 19, 2006; the California Regional Water Quality Control Board issuing NPDES Permit No. CA0109223 and Notice of Intent to Discharge for Storm Water Associated with Construction Activities (WDID #9 37C361181); the City of Carlsbad issuing Redevelopment Permit RP 05-12(A), Specific Plan 144 with Amendment 144(J) SP 144(J), Habitat Management Plan Permit Amendment HMP 05-08(A), Precise Development Plan PDP 00-02(B), Mitigation Monitoring and Reporting Program for EIR 03-05(A), Development Agreement DA 05-01(A), Standard Urban Storm Water Mitigation Program (September 2009), and Coastal Development Permit 04-41; the State of California State Lands Commission issuing an Amendment of Lease PRC 8727.1 (August 2008).
The environmental documents and permits are found at the following link:
http://www.sdcwa.org/carlsbad-desalination-project-approved-permits-and-plans State Lands Commission Lease Application (Amendment of Lease PRC 8727.1 August 2008). Amends lease of land by Cabrillo Power I LLC (Cabrillo) from the State Lands Commission for the lands where the project will be constructed. Cabrillo and Poseidon entered into agreement on July 1, 2003, authorizing Poseidon to use those lands to construct the project.
5.2.2 Water Authority Capital Improvement Program and Financial Information
The Water Authority’s Capital Improvement Program (CIP) can trace its beginnings to a report approved by the Board in 1989 entitled, The Water Distribution Plan, and a Capital Improvement Program through the Year 2020. The Water Distribution Plan included ten 31 Padre Dam Metropolitan Water District
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projects designed to increase the capacity of the aqueduct system, increase the yield from existing water treatment plants, obtain additional supplies from Metropolitan WD, and increase the reliability and flexibility of the aqueduct system. Since that time the Water Authority has made numerous additions to the list of projects included in its CIP as the region’s infrastructure needs and water supply outlook have changed.
The current list of projects included in the CIP is based on the results of planning studies, including the 2005 UWMP and the 2002 Regional Water Facilities Master Plan. These CIP projects, which are most recently described in the Water Authority’s Adopted Multi-Year Budget, include projects valued at $3.50 billion. These CIP projects are designed to meet projected water supply and delivery needs of the member agencies through 2045. The projects include a mix of new facilities that will add capacity to existing conveyance, storage, and treatment facilities, as well as repair and replace aging infrastructure:
• Asset Management – The primary components of the asset management projects include relining and replacing existing pipelines and updating and replacing metering facilities.
• New Facilities – These projects will expand the capacity of the aqueduct system, complete the projects required under the Quantification Settlement Agreement (QSA), and evaluate new supply opportunities.
• Emergency Storage Project – Projects remaining to be completed under the ongoing ESP include the San Vicente Dam Raise, the Lake Hodges projects, and a new pump station to extend ESP supplies to the northern reaches of the Water Authority service area.
• Other Projects – This category includes out-of-region groundwater storage, increased local water treatment plant capacity, and projects that mitigate environmental impacts of the CIP.
The Water Authority Board of Directors is provided a semi-annual and annual report on the status of development of the CIP projects. As described in the Water Authority’s biennial budget, a combination of long and short term debt and cash (pay-as-you-go) will provide funding for capital improvements. Additional information is included in the Water Authority’s biennial budget, which also contains selected financial information and summarizes the Water Authority’s investment policy.
Section 6 - Existing and Projected Supplies
Padre Dam MWD’s UWMP identifies the quantity of water supplied to the agency’s customers including a breakdown of land uses. According to California Code, Water Code – WAT §10631(d). (1) For an urban retail water supplier, quantify, to the extent records are available, past and current water use, over the same five-year increments described in subdivision (a), and projected water use, based upon information developed pursuant to subdivision (a), identifying the uses among water use sectors, including, but not necessarily limited to, all of the following… (2). The water use projections shall be in the same five-year 32 Padre Dam Metropolitan Water District
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increments described in subdivision (a). (4)(A) Water use projections, where available, shall display and account for the water savings estimated to result from adopted codes, standards, ordinances, or transportation and land use plans identified by the urban water supplier, as applicable to the service area.
The potable water demands served by Padre Dam MWD are primarily residential, commercial, industrial, institutional, and irrigation. The potable water demand is presented in Table 6 for the 2019-2020 year.
Table 6 – Demands for Potable and Non-Potable Water – Actual Use Type 2020 Actual
Additional Description Volume (AFY)
Single Family Residential Municipal and Industrial 5,447 Multi-Family Residential Municipal and Industrial 1,793 Commercial Municipal and Industrial 1,112
Institutional/Governmental Municipal and Industrial 191 Landscape Municipal and Industrial 362
Agriculture Irrigation 106
Other Construction 99
Other Unbilled Unmetered(1) 30
Other Potable Supplemental to Recycled
Water System 18
Losses(2) 431
Total 9,588
(1) Unbilled unmetered includes water flushing, sewer flushing, and firefighting. Values were obtained from the American Water Works Association (AWWA) Audit Report 2020.
(2) Losses obtained from AWWA Audit Report 2020 equates to approximately 449 acre-feet per year (AFY) (Appendix E). Potable supplement to recycled water was included as part of the losses in the audit. Thus, losses in this table are adjusted to reflect losses without potable supplement to the recycled water system.
Source: Padre Dam Municipal Water District 2020 UWMP.
The water use by sector is summarized from billing records based on individual meter readings. As shown in Table 6, residential demand account for approximately 76% of Padre Dam MWD’s total demand. Commercial, institutional, and governmental accounts for 13% of Padre Dam MWD’s total demand. The remaining 11% accounts for landscape irrigation, agricultural irrigation, construction, potable supplement to the recycled water system, and losses.
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Table 7 contains the projected potable water demands within and outside of the Padre Dam MWD boundary from 2025 through 2045. These are only general estimates of projected use and may vary significantly based on future development and water conservation measures taken by each customer sector. The implementation, magnitude, and type of development in the future will determine the distribution of water use per type.
Table 7
Demands for Potable and Non-Potable Water – Projected (AFY) Use Type Additional Description
(as needed)
2025 2030 2035 2040 2045
Residential 7,438 8,217 9,004 9,683 10,070
Commercial 1,398 1,465 1,525 1,585 1,645
Institutional/Governmental 188 191 194 196 199
Landscape 357 579 73 817 822
Agricultural irrigation 104 161 181 186 187
Other(1) Construction and
Unmetered
127 137 146 156 166
Losses(2) 442 449 455 461 468
Other Potable Outside of District(3) 2,388 2,388 2,388 2,388 2,388 TOTAL 12,442 13,586 14,623 15,473 15,944
(1) Other category includes construction and water used for potable flushing, sewer flushing, and firefighting. (2) Includes potable water supplement to recycled water. (3) Outside of District includes the near term annexations, which includes the Viejas tribe, Ewiiaapaayp tribe, and the I-8 corridor outside of the Padre Dam MWD’s eastern boundary.
Source: Padre Dam Municipal Water District 2020 UWMP.
Padre Dam MWD’s potable water demand is anticipated to increase to 15,944 AFY by year 2045.
Water may be recycled for non-potable or potable purposes. Table 8 considers non-potable recycling within the Padre Dam MWD’s service area. In 1959, Padre Dam MWD developed a local wastewater treatment plant and water reclamation facility. The facility treats wastewater at a tertiary level. Approximately one million gallons per day (MGD) of the treated wastewater is discharged into Santee Lakes. The remaining water is used for irrigation at community parks, schools, city streetscapes, and community fountains. Padre Dam MWD’s existing recycled water system includes the Ray Stoyer WRF, the Recycled Water Effluent Pump Station, and Fanita Terrace Reservoir.
Padre Dam MWD’s recycled water demand increased from 2001 to 2014 with a peak of 1,025 AFY in 2014. Since 2014, recycled water demands have decreased. The current and projected recycled water uses are summarized in Table 8. Since Padre Dam MWD does not plan to expand the recycled water system, the recycled water demand is expected to remain steady. The projected recycled water volumes are based on current agreements, which may be revised in the future.
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Table 8
Recycled Water Beneficial Uses Within Service Area (AFY) Beneficial Use
Type
Potential
Beneficial
Uses of
Recycled
Water
Amount
of
Potential
Uses of
Recycled
Water
General
Description
of 2020 Uses
2020(5) 2025(4) 2030(4) 2035(4) 2040(4) 2045(4)
Landscape
irrigation (exc
golf courses)(3)
Parks,
medians,
HOA
landscapes,
dust control
1,232 Parks,
medians,
HOA
landscapes,
dust control
780 1,232 1.232 1.232 1.232 1.232
Recreational
impoundment(3)(4)
Santee Lakes
replenishment
and Flushing
1,120 Santee Lakes
replenishment
and Flushing
970
1,750
970
2,202
0 1,232
0 1,232
0 1,232
0 TOTAL 1,232
(1) Supplemental water includes 198 AFY from the non-potable groundwater well and 18 AFY potable supplemental water. (2) The future AWP Program will eliminate untreated groundwater and potable water use for supplementing the recycled water system, thereby further enhancing source water availability and reliability.
(3) Used in Table 4 as planned recycled water demand.
(4) Santee Lakes will be replenished by water from the brine minimization process planned at the AWP facilities. (5) Volumes do not include supplemented water quantities noted above.
Source: Padre Dam Municipal Water District 2020 UWMP.
As shown in Table 1, the total projected water use including recycled water is anticipated to increase by 17,176 AFY by 2045. Recycled water use is expected to decrease to 1,232 AFY after 2025 due to discontinuation of discharge into Santee Lakes. The recycled water demand is assumed to remain the same through the remainder of the planning horizon.
6.1 Demand Management (Water Conservation)
Demand management, or water conservation is a critical part of the Padre Dam MWD 2020 UWMP and its long term strategy for meeting water supply needs of Padre Dam MWD customers. Water conservation, is frequently the lowest cost resource available to any water agency. The goals of the Padre Dam MWD water conservation programs are to:
• Reduce the demand for more expensive, imported water. • Demonstrate continued commitment to the Best Management Practices (BMP). • Ensure a reliable water supply.
Padre Dam MWD is signatory to the Memorandum of Understanding (MOU) Regarding Urban Water Conservation in California, which created the California Urban Water Conservation Council (CUWCC) in 1991 in an effort to reduce California’s long-term water demands. Water conservation programs are developed and implemented on the premise that water conservation increases the water supply by reducing the demand on available supply, which is vital to the optimal utilization of a region’s water supply resources. Padre Dam 35 Padre Dam Metropolitan Water District
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MWD participates in many water conservation programs designed and typically operated on a shared cost participation program basis among the Water Authority, Metropolitan WD, and their member agencies.
As one of the first signatories to the MOU Regarding Urban Water Conservation in California, Padre Dam MWD has made BMP implementation for water conservation the cornerstone of its conservation programs and a key element in its water resource management strategy. As a member of the Water Authority, Padre Dam MWD also benefits from regional programs performed on behalf of its member agencies. The BMP programs implemented by Padre Dam MWD and regional BMP programs implemented by the Water Authority that benefit all their member agencies are addressed in the Padre Dam MWD 2020 UWMP. In partnership with the Water Authority, the County of San Diego, City of San Diego, City of Chula Vista, and developers, Padre Dam MWD water conservation efforts are expected to grow and expand. The resulting savings directly relate to additional available water in the San Diego County region for beneficial use within the Water Authority service area, including Padre Dam MWD.
Additional conservation or water use efficiency measures or programs practiced by Padre Dam MWD include the following:
• Supervisory Control and Data Acquisition System
Padre Dam MWD implemented and has operated for many years a Supervisor Control and Data Acquisition (SCADA) system to control, monitor, and collect data regarding the operation of the water system. The major facilities that have SCADA capabilities are the water flow control supply sources, transmission network, pumping stations, and water storage reservoirs. The SCADA system allows for many and varied useful functions.
Some of these functions provide for operating personnel to monitor the water supply source flow rates, reservoir levels, turn on or off pumping units, etc. The SCADA system aids in the prevention of water reservoir overflow events and increases energy efficiency. • Water Conservation Ordinance
California Water Code section 375 et seq. permit public entities which supply water at retail to adopt and enforce a water conservation program to reduce the quantity of water used by the people therein for the purpose of conserving water supplies of such public entity. The Padre Dam MWD Board of Directors established a comprehensive water conservation program pursuant to California Water Code section 375 et seq., based upon the need to conserve water supplies and to avoid or minimize the effects of any future shortage. A water shortage could exist based upon the occurrence of one or more of the following conditions:
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1. A general water supply shortage due to increased demand or limited supplies.
2. Distribution or storage facilities of the Water Authority or other agencies become inadequate.
3. A major failure of the supply, storage, and distribution facilities of Metropolitan WD, Water Authority, and/or Padre Dam MWD.
The Padre Dam MWD water conservation ordinance finds and determines that the conditions prevailing in the San Diego County area require that the available water resources be put to maximum beneficial use to the extent to which they are capable, and that the waste or unreasonable use, or unreasonable method of use, of water be prevented and that the conservation of such water be encouraged with a view to the maximum reasonable and beneficial use thereof in the interests of the people of Padre Dam MWD and for the public welfare.
6.2 Projected Single Dry Year
Table 9 presents the forecasted balance of water demands and required supplies for the Padre Dam MWD area under average or normal year conditions. The total actual demand for FY 2025 was projected at 14,586 acre feet. The demand for FY 2025 is the same as the supply which is 14,586 AFY. Unaccounted for demands for the project (42 AFY) will be supplied by the Water Authority’s Accelerated Forecasted Growth component.
Table 9
Single Dry Year Supply and Demand Comparison (AFY)
2025 2030 2035 2040 2045
Water Authority Supplies 14,586 15,751 16,819 17,685 18,148 Water Authority Accelerated Forecast
Growth Increment
42 42 42 42 42
Supply Totals (1) 14,628 15,793 16,861 17,727 18,190
Padre Dam MWD Demands 14,586 15,751 16,819 17,685 18,148 TCSP Project Additional Demands 42 42 42 42 42
Demand totals(2)(3) 14,628 15,793 16,861 17,727 18,190
Difference(4) 0 0 0 0 0
(1) Under single dry year conditions, the Water Authority is projecting to use 328,700 AFY in the Water Authority supplies (IID Water Transfer, AAC and CC Lining Projects, and Carlsbad Desalination Plant), a range of 126,490 AFY to 209,901 AFY in verifiable member agency supplies (surface supplies have been reduced), and a range of 336,232 AFY to 338,000 AFY in Metropolitan supplies (Metropolitan supplies have increased) from 2025 through 2045. In addition, between 194,457 to 236,181 AFY in demands will be met through potential surplus supply or management actions
(2) Water Authority methodology was used to select the single dry year scenario. (3) Projections assume an increase based on the percentages listed in the Padre Dam MWD 2020 UWMP.
(4) Net difference of zero, which assumes that conservation and local supply sources will be used to Padre Dam MWD acknowledges the ever-present challenge of balancing water supply with demand and the inherent need to possess a flexible and adaptable water supply 37 6.3
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implementation strategy that can be relied upon during normal and dry weather conditions.
The responsible regional water supply agencies have and will continue to adapt their resource plans and strategies to meet climate, environmental, and legal challenges so that they may continue to provide water supplies to their service areas. The regional water suppliers along with Padre Dam MWD fully intend to maintain sufficient reliable supplies through the 20- year planning horizon under normal, single, and multiple dry year conditions to meet projected demand of the Project, along with existing and other planned development projects within the Padre Dam MWD service area.
This WSA Report assesses, demonstrates, and documents that sufficient water supplies are planned for and are intended to be acquired, as well as the actions necessary and status to develop these supplies, to meet projected water demands of the Project as well as existing and other reasonably foreseeable planned development projects within the Padre Dam MWD for a 20-year planning horizon, in normal and in single and multiple dry years.
Projected Multiple Dry Year Supply and Demand
Table 10 shows projected supply and demand totals for the multiple dry year assessment in five-year increments for the period 2025 through 2045. Imported and recycled water supplies match those previously provided in the 2020 UWMP. The Accelerated Forecasted Growth component of the Water Authority’s 2020 UWMP is projected to provide additional supply capacity to the Padre Dam MWD. A portion this excess amount is available to supply the additional 41.81 AFY Project demand, as confirmed by the Water Authority. (See Appendix D for confirmation from the Water Authority.) Demands during the multiple dry year analysis are projected to remain the same as in normal years and do not account for potential demand mitigation that can be implemented by the Padre Dam MWD to reduce demands in drought conditions. Therefore, the demand projections in Table 10 are conservative.
Table 10
Projected Multiple-Dry Year Supply and Demand Comparison (2025-2045, AFY) Supply and Demand Comparison – Multiple Dry Year Events 2025 2030 2035 2040 2045
1st Year Water Authority Supply 14,586 15,751 16,819 17,685 18,148 Water Authority AFG
Increment 42 42 42 42 42
Supply Totals 14,628 15,793 16,861 17,727 18,190
Padre Dam MWD
Demands 14,586 15,751 16,819 17,685 18,148
TCSP Project Additional
Demands 42 42 42 42 42
Demand totals 14,628 15,793 16,861 17,727 18,190
Difference 0 0 0 0 0
2nd Year Water Authority Supply 14,732 15,909 16,987 17,862 18,371 Water Authority AFG
Increment 42 42 42 42 42
Supply Totals 14,774 15,951 17,029 17,904 18,413
Padre Dam MWD
Demands 14,732 15,909 16,987 17,862 18,371
38 Padre Dam Metropolitan Water District
Water Supply Assessment
Town Center Specific Plan
Supply and Demand Comparison – Multiple Dry Year Events 2025 2030 2035 2040 2045
TCSP Project Additional
Demands 42 42 42 42 42
Demand totals 14,774 15,951 17,029 17,904 18,413
Difference 0 0 0 0 0
3rd Year Water Authority Supply 14,879 16,068 17,157 18,040 18,513 Water Authority AFG
Increment 42 42 42 42 42
Supply Totals 14,921 16,110 17,199 18,082 18,555
Padre Dam MWD
Demands 14,879 16,068 17,157 18,040 18,513
TCSP Project Additional
Demands 42 42 42 42 42
Demand totals 14,921 16,110 17,199 18,082 18,555
Difference 0 0 0 0 0
4th Year Water Authority Supply 15,028 16,228 17,329 18,221 18,698 Water Authority AFG
Increment 42 42 42 42 42
Supply Totals 15,070 16,270 17,371 18,263 18,740
Padre Dam MWD
Demands 15,028 16,228 17,329 18,221 18,698
TCSP Project Additional
Demands 42 42 42 42 42
Demand totals 15,070 16,270 17,371 18,263 18,740
Difference 0 0 0 0 0
5th Year Water Authority Supply 15,178 16,391 17,502 18,403 18,885 Water Authority AFG
Increment 42 42 42 42 42
Supply Totals 15,220 16,433 17,544 18,445 18,927
Padre Dam MWD
Demands 15,178 16,391 17,502 18,403 18,885
TCSP Project Additional
Demands 42 42 42 42 42
Demand totals 15,220 16,433 17,544 18,445 18,927
Difference 0 0 0 0 0
39 Padre Dam Metropolitan Water District
Water Supply Assessment
Town Center Specific Plan
Section 7 – Conclusion: Availability of Sufficient Supplies The Water Authority and Metropolitan WD have an established process that ensures supplies are being planned to meet future growth. Any annexations and revisions to established land use plans are captured in the San Diego Association of Governments (SANDAG) updated forecasts for land use planning, demographics, and economic projections. SANDAG serves as the regional, intergovernmental planning agency that develops and provides forecast information. The Water Authority and Metropolitan WD update their demand forecasts and supply needs based on the most recent SANDAG forecast approximately every five years to coincide with preparation of their urban water management plans. Prior to the next forecast update, local jurisdictions with land use authority may require water supply assessment and/or verification reports for proposed land developments that are not within the Padre Dam MWD, Water Authority, or Metropolitan WD jurisdictions (i.e. pending or proposed annexations) or that have revised land use plans with either lower or higher development intensities than reflected in the existing growth forecasts. Proposed land areas with pending or proposed annexations, or revised land use plans, typically result in creating higher demand and supply requirements than previously anticipated. Padre Dam MWD, Water Authority, and Metropolitan WD next demand forecast and supply requirements and associated planning documents would then capture any increase or decrease in demands and required supplies as a result of revised land use planning decisions such as the Project. In anticipation of these development yields water demand and supply planning information for the Project will be incorporated into and become a permanent part of their water resources planning processes and documents.
Metropolitan WD’s Integrated Resources Plan (IRP) identifies a mix of resources (imported and local) that, when implemented, will provide 100 percent reliability for full-service demands through the attainment of regional targets set for conservation, local supplies, State Water Project supplies, Colorado River supplies, groundwater banking, and water transfers.
The 2020 update to the IRP includes a planning buffer supply intended to mitigate against the risks associated with implementation of local and imported supply programs and for the risk that future demands could be higher than projected. The planning buffer identifies an additional increment of water that could potentially be developed when needed and if other supplies are not fully implemented as planned. As part of implementation of the planning buffer, Metropolitan WD periodically evaluates supply development, supply conditions, and projected demands to ensure that the region is not under or over developing supplies.
Managed properly, the planning buffer will help ensure that the southern California region, including San Diego County, will have adequate water supplies to meet long-term future demands.
In Section ES-5 of their 2020 RUWMP, Metropolitan WD states that they have supply capacities that would be sufficient to meet expected demands from 2025 through 2045.
Metropolitan WD has plans for supply implementation and continued development of a diversified resource mix including programs in the Colorado River Aqueduct, State Water Project, Central Valley Transfers, local resource projects, and in-region storage that enables the region to meet its water supply needs. Metropolitan WD’s 2020 RUWMP identifies 40 Padre Dam Metropolitan Water District
Water Supply Assessment
Town Center Specific Plan
potential reserve supplies in the supply capability analysis which could be available to meet the unanticipated demands.
The County Water Authority Act, Section 5 subdivision 11, states that the Water Authority “as far as practicable, shall provide each of its member agencies with adequate supplies of water to meet their expanding and increasing needs.”
As part of preparation of a written water supply assessment report, an agency’s shortage contingency analysis should be considered in determining sufficiency of supply. Section 11 of the Water Authority’s 2020 Updated UWMP contains a detailed shortage contingency analysis that addresses a regional catastrophic shortage situation and drought management.
The analysis demonstrates that the Water Authority and its member agencies, through the Emergency Response Plan, Emergency Storage Project, Carlsbad Desalination Project, and Drought Management Plan (DMP) are taking actions to prepare for and appropriately handle an interruption of water supplies. The DMP, adopted in May 2006, provides the Water Authority and its member agencies with a series of potential actions to take when faced with a shortage of imported water supplies from Metropolitan WD due to prolonged drought or other supply shortfall conditions. The actions will help the region avoid or minimize the impacts of shortages and ensure an equitable allocation of supplies.
This WSA Report identifies and describes the processes by which water demand projections for the proposed Project will be fully included in the water demand and supply forecasts of the Urban Water Management Plans and other water resources planning documents of the Water Authority and Metropolitan WD. Water supplies necessary to serve the demands of the proposed Project, along with existing and other projected future users, as well as the actions necessary and status to develop these supplies, have been identified in the WSA Report and will be included in the future water supply planning documents of the Water Authority and Metropolitan WD. The Assessment demonstrates sufficient water supply to serve the Padre Dam MWD, including the increased demand from the Project from 2025 to 2045 in normal, single-, and multiple- dry year scenarios.
This Assessment does not create a right or any entitlement to water service. It is not a commitment to serve the Project but is a review of the Padre Dam MWD’s total projected water supplies and an analysis of the Padre Dam MWD’s ability to serve the Project based on presently available information. This Assessment and its analyses and conclusions are conditioned in part on the ability of Metropolitan and the Water Authority to continue to supply imported water to meet the Padre Dam MWD’s needs. Water service also is contingent upon prompt payment of all charges, rates, and fees as adopted by the Padre Dam MWD from time to time. All landscape plans are required to ensure compliance with applicable requirements, and the applicant/developer will be required to plan and install water efficient devices and landscaping in accordance with applicable Padre Dam MWD development Guidelines and Standards, ordinances, and requirements.
This WSA Report includes, among other information, an identification of existing water supply entitlements, water rights, water service contracts, water supply projects, or 41 Padre Dam Metropolitan Water District
Water Supply Assessment
Town Center Specific Plan
agreements relevant to the identified water supply needs for the proposed Project. This WSA Report assesses, demonstrates, and documents that sufficient water supplies are planned for and are intended to be available over a 20-year planning horizon, under normal conditions and in single and multiple dry years to meet the projected demand of the proposed Project and the existing and other planned development projects to be served by the Padre Dam MWD. 42 Padre Dam Metropolitan Water District
Water Supply Assessment
Town Center Specific Plan
Source Documents
Padre Dam Metropolitan Water District, “Comprehensive Facilities Master Plan Update,” June 2022.
Padre Dam Metropolitan Water District, “Padre Dam Municipal Water District 2020 Urban Water Management Plan,” June 2021.
San Diego County Water Authority, “Urban Water Management Plan 2020 Update,” June 2021.
Metropolitan Water District of Southern California, “2020 Regional Urban Water Management Plan,” June 2021.
Agreement between the San Diego County Water Authority and Padre Dam Metropolitan Water District regarding Implementation of the East County Regional Treated Water Improvement Program.
Agreement between the San Diego County Water Authority and Padre Dam Metropolitan Water District for Design, Construction, Operation, and Maintenance. 43 Appendix A
Existing Land Use for Padre Dam MWD in 2020 UWMP
,-···-- '-··,; - .... •-1~
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- __ °""""_....._, .. ,1
_ __ .., __ 9'1ri.,
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Existing Land Use
Appendix B
Existing Town Center Specific Plan Land Use Designations _,
8..c
FLOOD/0
R2 - Residential 2•6 OU/AC
R-7 - Residential 7-14 OU/AC
R-14 - Residential 14-22 OU/AC
R·22 - Residential 22·30 DU/AC
R-30 - Residential 30 OU/AC
T
R14
..... R22.u. ,,.,,. 1-<rrrrr
P-Park
OS - Open Space
Comm - Commercial
Flood - Floodway
Inst-Institutional
~ Arts & Entertainment Overlay District
c:J Riverv iew Office Park Area
L
Existing Town Center Specific Plan Land Use Designations Appendix C
Proposed Town Center Specific Plan Land Use Designations ~~ tiDlfIIIl1Jr - LL.!'-
l
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R14
17 FLOOD/OS
R7
R22
1)7]
R2 - Residential 2-6 DU/AC
R-7 - Residential 7-14 DU/AC
R-14 - Residential 14-22 DU/AC
R-22 - Residential 22-30 DU/AC
R-30 - Residential 30 DU/AC
P - Park
OS - Open Space
Comm - Commercial
Flood - Floodway
Inst - lnstitut.ional
~ Arts & Entertainment Overlay District
D RiverView Office Park Area
Proposed Town Center Specific Plan Land Use Designations Appendix D
Water Authority Accelerated Forecasted Growth Request
I
/J-.. San Diego County
~ Water Authority
From: Crutchfield, Jeremy
To: [email protected]; [email protected]
Cc: Hammond, Leanne; Rivera, Elisa; Bombardier, Tim; Stephenson, Jeff; Bista, Seevani Subject: SDCWA UMWP - Accelerated Forecasted Growth
Date: Wednesday, July 17, 2024 10:27:59 AM
Attachments: image001.png
Padre Dam AFG Request.pdf
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Dear Mr. Clapp:
Thank you for your email regarding the Padre Dam MWD’s City of Santee’s proposed Town Center Specific Plan Project (Town Center Project). The following is the Water Authority’s response to your request to use the Accelerated Forecasted Growth (AFG) component of the Water Authority’s 2020 Urban Water Management Plan to meet the unanticipated water demands associated with the Town Center Project
The purpose of the AFG component of the demand forecast is to estimate, on a regional basis, additional demand associated with proposed projects not yet included in local jurisdictions’ general plans and to plan for sufficient regional supplies to reliably meet the water demand of those projects.
The Town Center Project identified in your July 8, 2024 letter (attached), meets the criteria for the AFG component of the Water Authority’s 2020 UWMP and we are planning to have water supplies to reliably meet the demand associated with the project. Our accounting of the AFG demand component will be adjusted to reflect the additional demand of 41.8 acre-feet per year associated with the proposed project.
In order to accurately account for utilization of the AFG, we request that the Padre Dam MWD send the Water Authority notification of when this project or any other project that utilized the AFG demand component is approved.
Please let me know if you have any questions or want to discuss further.
Regards,
Jeremy
Jeremy Crutchfield
Manager, Water Resources Department
Office (858) 522-6834 | Cell (858) 344-3878
Email [email protected]
/
/ ✓
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P/\.DRED/\.M
Municipal Water' dlstru::t:.
July 8, 2024
Seevani Bista
Senior Water Resources Specialist
San Diego County Water Authority
[email protected]
Dear Ms. Bista,
The Padre Dam Municipal Water District (Padre Dam MWD) requests use of the Accelerated Forecasted Growth component of the San Diego County Water Authority's (Water Authority) 2020 Urban Water Management Plan for the City of Santee's proposed Town Center Specific Plan Amendment Project (Project). The Project is a mixed use village consisting of 79 acres located in the central portion of the City of Santee's Town Center Specific Plan. The Project is within the overall TCSP area that includes approximately 608 acres across several land uses and proposes a maximum anticipated development yield on certain properties:
• Arts and Entertainment (2,399,474 SF of non-residential buildings) • Four Housing Element Sites (11,480 dwelling units)
The Project is bordered generally by Mast Boulevard to the north, Magnolia Avenue to the east, Santee Lakes to the west, and Mission Gorge Road to the south . The Project is currently located within the jurisdictions of Padre Dam MWD and the Water Authority. Please find the attached a vicinity map for your reference.
Most of the proposed development for this project was accounted for in the SAN DAG Series 13 forecast, with the majority of the water demand associated with the Project included in the Padre Dam MWD 2020 Urban Water Management Plan. However, changes to the Project resulting in water demands associated with unaccounted growth were not included in the SAN DAG Series 13 forecast or the Padre Dam MWD 2020 Urban Water Management Plan. The previously planned water use for the site was 796.4 AFY and changes to land use and development density results in an increase in water demands of 41.8 AFY; this increase would be suppl ied by the requested use of the Water Authority's Accelerated Forecasted Growth component. A summary of the Project's change in water demand is shown in the table below:
BOARD OF DIRECTORS: Brian Fordyce I Suzanne Till I Bill Pommering I Ivan Andujar I Rocky Qualin 9300 Fanita Parkway, Santee, CA 92071 I PO Box 719003, Santee, CA 92072 I 619.448.31 11 I www.padredam.org ,,.,......-.---...____......_,....,,,,-,
/ ./
PJ\.DREDJ\.M
Mun'"f'll::ip'al W a-ner 01st r ic t
Water Demands (Acre-Feet per Year)
Project Initial Planned Revised Projection Increase
Town Center Specific
Plan
796.4 838.2 41.8
Sincerely,
Lewis Clapp
Director of Engineering
BOARD OF DIRECTORS: Brian Fordyce I Suzanne Till I Bill Pommeri ng I Ivan Andujar I Rocky Qualin 9300 Fanita Parkway, Santee, CA 92071 I PO Box 719003, Santee, CA 92072 I 619.448.3111 I www.padredam .org Padre Dam Metropolitan Water District
Water Supply Assessment
Town Center Specific Plan
Proposed Town Center Specific Plan Land Use Designations
FLOOD/OS
'.P'
< !' 'I'
.,-,.
. n :·· .. . ; :· N'.,
R2- Residential 2·6 DU/AC P-P'ark
R~7 - Resfdentkd 7-14 DU/A.C OS - Open Space
R; ..14 .... Resfdent~al 14..22 DU/AC Comm - Commercial R..22 ·- Resldentrial 22..30 DUJAC Flood ... Floodway
R•30- R.esidenttal 30 OU/AC Inst - lnstltutlonal
cm Arts & Entertainment Overla,y District
(B RiverView Office P·ark Area
Appendix E
City of Santee Request for Water Supply Assessment
CALIFORNIA
Mayor
John W. Minto
City Council
Ronn Hall
Laura Koval
Rob McNelis
Dustin Trotter
10601 Magnolia Ave.• Santee, CA 92071
PLANNING & BUILDING DEPARTMENT
(619) 258-4100 • CityofSanteeCA.gov
March 18, 2024
Lewis Clapp, Engineering Manager
Padre Dam Municipal Water District
9300 Fanita Pkwy, Santee, CA 92071
Subject: Request for Water Supply Assessment
Dear Mr. Clapp:
The City of Santee is preparing a comprehensive update to its Town Center Specific Plan (TCSP), including updates to the Arts and Entertainment Neighborhood, and development of concept plans for four strategic Housing Element sites (Figure 1). The update would allow development to occur in the TCSP area shown in Figure 1 per the projections provided in the tables included on the following page. Table 1 represents the complete buildout of the TCSP; the projections for the AEN (Table 2) and four Housing Element sites (Table 3) are sub-geographies fully contained within the TCSP area and Table 1 projections. These development potentials are consistent with adopted plans and zoning, including the recently approved Housing Element, approved in October 2022.
However, we understand not all of this development may have been anticipated in the most recent Urban Water Management Plan.
Because the project is located within the Padre Dam Municipal Water District service area and the projected buildout may not have been previously considered by the District, we are requesting a Water Supply Assessment in accordance with California Public Resources Code Section 15155 and Water Code Section 10910 - 10915. Please include in your analysis a discussion of whether the recent applicable Urban Water Management Plan addresses the proposed project water use, availability of both the potable and recycled water supplies during normal, single dry, and multiple dry water years during a 20-year projection, and potential impacts of its use on water availability and reliability.
Staff is prepared to work with you to ensure you have the information necessary to complete the assessment in a timely manner. Currently, we anticipate releasing the public review draft EIR in June 2024, and the requested Water Supply Assessment should be included within the public review draft EIR. If you have any questions, please contact me at 619-258-4100 ext. 160.
Sincerely,
Michael Coyne
Principal Planner
TCSP Area Development Potential Tables
Table 1
TCSP Buildout Summary
Existing
Nonresidential
Buildings
(SF)
Existing
Dwelling
Units
Potential
Nonresidential
Buildings
(SF)
Minimum
Allowable
Number of
Dwelling
Units
Maximum
Allowable
Number of
Dwelling
Units
State Density
Bonus
Assumptions
Total
Dwelling
Units
TCSP
Totals 1,756,567 814 3,905,431 2,622 3,441 513 3,954
Table 2
Arts and Entertainment Neighborhood Buildout Summary
Existing
Nonresidential
Buildings
(SF)
Existing
Dwelling
Units
Potential
Nonresidential
Buildings
(SF)
Minimum
Allowable
Number of
Dwelling
Units
Maximum
Allowable
Number of
Dwelling
Units
State
Density Bonus
Assumptions
Total
Dwelling
Units
AEN
Totals 607,371 300 2,399,474 1,225 1,482 298 1,780
Table 3-3
Four Housing Element Sites Buildout Summary
Site Land Use
Designation
Allowed
Density
Range
Existing
Nonresidential
Buildings
(S.F.)
Existing
Dwelling
Units
Potential
NonResidential
Buildings
(S.F.)
Mixed Use
Overlay
Assumption
Minimum
Allowable
Number
of
Dwelling
Units
Maximum
Allowable
Number
of
Dwelling
Units
State
Density
Bonus
Assumption
Total
Dwelling
Units
16A TC-R-30 30-36
DU/AC
N/A N/A 181,482 10% 333 400 120 520
16B TC-R-14 14-22
DU/AC
N/A N/A 90,012 10% 121 189 N/A 189
20A TC-R-22 22-30
DU/AC
N/A N/A 118,157 10% 171 233 70 303
20B TC-R-30 30-36
DU/AC
N/A N/A N/A N/A 300 360 108 468
HE
Sites
Totals
N/A N/A N/A N/A 389,651 N/A 925 1,182 298 1,480
0 Proposed Santee Town Center Specific Plan
0 0
~
0 <2Z>
•
E---3 E---3
Santee Town Center Specific Plan EIR
yia^Njna
Proposed Arts and Entertainment Neighborhood Mast Blvd i Mast Blvd .0' Mast Blvd
Site 16A
Site 16B
Bilteer.
Site 20A Jennifer Dr. ^W^amS9ateDr ^—Paln^Glen-DF
Site 20B (payfgmekiJFfli Bundy Dr Follett Dr . .
Current Santee Town Center Specific Plan
^Braverman Dr
Current Art and Entertainment Boundary River,walk-Dr ind^ \flafHillcreek Rd
Domer Leila Ln I
Claudia Ave
River ParkTDi
^orth Roundup Cir
- 00^5 .Cliubbln, RK Brb6^ 3/4/2024 Rive* 01427.00004.001: . / fRiyeryiew^ky^ :
Fig3-2_Boundaries iTd$h\£entgr. Pk£ /saw
'C9dsit~Lyn
Granada r . St
I/1/ooq^ 'v/oma St 1 'Willowgrove Ave
Gorge Aye
JjarkAye,
Mission Gorge Rd^ l:\PROJECTS\M\MW_SteeleGroup_01427\00004_SanteeHAP\Map\EIR\Figures.aprx Maj Happy Ln ' Source: Aerial (SanGIS, 2023) 800 Feet
HELIX Project Boundaries
Environmental Planning
Figure 1