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2022 03 22 COA SDP (draft) - Coral Mountain ResortSite Development Permit 2021-0001 Wave Basin Requested Engineering Conditions GENERAL 1. The applicant agrees to defend, indemnify and hold harmless the City of La Quinta (“City”), its agents, officers and employees from any claim, action or proceeding to attack, set aside, void, or annul the approval of this Site Development Permit. The City shall have sole discretion in selecting its defense counsel. The City shall promptly notify the applicant of any claim, action or proceeding and shall cooperate fully in the defense. 2. Site Development Permit 2021-0001 shall comply with all applicable conditions and/or mitigation measures for the following related approvals: Tentative Tract Map 2019-0005 (TTM 37815) Environmental Assessment 2019-0010 In the event of any conflict(s) between approval conditions and/or provisions of these approvals, the Design and Development Director shall adjudicate the conflict by determining the precedence. 3. Prior to the issuance of any grading, construction, or building permit by the City, the applicant shall obtain any necessary clearances and/or permits from the following agencies, if required:  Riverside County Fire Marshal  La Quinta Public Works Department (Grading Permit, Green Sheet (Public Works Clearance) for Building Permits, Water Quality Management Plan(WQMP) Exemption Form – Whitewater River Region, Improvement Permit)  La Quinta Design & Development Department  Riverside Co. Environmental Health Department  Coachella Valley Unified School District  Coachella Valley Water District (CVWD)  Imperial Irrigation District (IID)  California Regional Water Quality Control Board (CRWQCB)  State Water Resources Control Board  SunLine Transit Agency (SunLine)  South Coast Air Quality Management District Coachella Valley (SCAQMD) The applicant is responsible for all requirements of the permits and/or clearances from the above listed agencies. When these requirements include approval of improvement plans, the applicant shall furnish proof of such approvals when submitting those improvement plans for City approval. 4. Coverage under the State of California Construction General Permit must be obtained by the applicant, who then shall submit a copy of the Regional Water Quality Control Board’s (“RWQCB”) acknowledgment of the applicant’s Notice of Intent (“NOI”) and Waste Discharge Identification (WDID) number to the City prior to the issuance of a grading or building permit. 5. The applicant shall comply with applicable provisions of the City’s NPDES stormwater discharge permit, LQMC Sections 8.70.010 et seq. (Stormwater Management and Discharge Controls), and 13.24.170 (Clean Air/Clean Water); Riverside County Ordinance No. 457; the California Regional Water Quality Control Board – Colorado River Basin Region Board Order No. R7- 2013-0011 and the State Water Resources Control Board’s Order No. 2009- 0009-DWQ and Order No. 2012-0006-DWQ. A. For construction activities including clearing, grading or excavation of land that disturbs one (1) acre or more of land, or that disturbs less than one (1) acre of land, but which is a part of a construction project that encompasses more than one (1) acre of land, the Permitee shall be required to submit a Storm Water Pollution Protection Plan (“SWPPP”) to the State Water Resources Control Board. The applicant or design professional can obtain the California Stormwater Quality Association SWPPP template at www.cabmphandbooks.com for use in their SWPPP preparation. B. The applicant shall ensure that the required SWPPP is available for inspection at the project site at all times through and including acceptance of all improvements by the City. C. The applicant’s SWPPP shall include provisions for all of the following Best Management Practices (“BMPs”) (LQMC Section 8.70.020 (Definitions)): 1) Temporary Soil Stabilization (erosion control). 2) Temporary Sediment Control. 3) Wind Erosion Control. 4) Tracking Control. 5) Non-Storm Water Management. 6) Waste Management and Materials Pollution Control. D. All erosion and sediment control BMPs proposed by the applicant shall be approved by the City Engineer prior to any onsite or offsite grading, pursuant to this project. E. The SWPPP and BMPs shall remain in effect for the entire duration of project construction until all improvements are completed and accepted by the City Council. F. The inclusion in the Master Homeowners’ Association (HOA) Conditions, Covenants, and Restrictions (CC&Rs), a requirement for the perpetual maintenance and operation of all post-construction BMPs as required. 6. Developer shall reimburse the City, within thirty (30) days of presentment of the invoice, all costs and actual attorney’s fees incurred by the City Attorney to review, negotiate and/or modify any documents or instruments required by these conditions, if Developer requests that the City modify or revise any documents or instruments prepared initially by the City to effect these conditions. This obligation shall be paid in the time noted above without deduction or offset and Developer’s failure to make such payment shall be a material breach of the Conditions of Approval. 7. Developer shall reimburse the City, within thirty (30) days of presentment of the invoice, all costs and actual consultant’s fees incurred by the City for engineering and/or surveying consultants to review and/or modify any documents or instruments required by this project. This obligation shall be paid in the time noted above without deduction or offset and Developer’s failure to make such payment shall be a material breach of the Conditions of Approval. PROPERTY RIGHTS 8. Prior to issuance of any permit(s), the applicant shall acquire or confer easements and other property rights necessary for the construction or proper functioning of the proposed development. Conferred rights shall include irrevocable offers to dedicate or grant access easements to the City for emergency services and for maintenance, construction and reconstruction of essential improvements. 9. Pursuant to the aforementioned condition, conferred rights shall include approvals from the master developer over easements and other property rights necessary for construction and proper functioning of the proposed development not limited to access rights over proposed and/or existing private streets that access public streets and open space/drainage facilities of the master development. 10. The applicant shall offer for dedication all public street rights-of-way in conformance with the City's General Plan, Municipal Code, applicable specific plans, and/or as required by the City Engineer. 11. The public street right-of-way offers for dedication required for this development include: A. PUBLIC STREETS 1) Madison Street (Modified Secondary Arterial) – No additional right of way dedication is required. 55 feet from the centerline of Madison Street for a total 110-foot ultimate developed right of way 2) Avenue 58 (Modified Secondary Arterial) – 55 feet from the centerline of Avenue 58 along the project boundary 3) Avenue 60 (Collector) – 40 feet from the centerline of Avenue 60 for a total 80-foot ultimate developed right of way 12. Dedications shall include additional widths as necessary for dedicated right and left turn lanes, bus turnouts, and other features contained in the approved construction plans. 13. When the City Engineer determines that access rights to the proposed street rights-of-way shown on the approved Site Development Permit are necessary prior to approval of the improvements dedicating such rights-of-way, the applicant shall grant the necessary rights-of-way within 60 days of a written request by the City. 14. The applicant shall create perimeter landscaping setbacks along all public rights-of-way as follows: A. Madison Street (Secondary Arterial) - 10-foot from the R/W-P/L. B. Avenue 58 (Secondary Arterial) - 10-foot from the R/W-P/L. C. Avenue 60 (Collector) - 10-foot from the R/W-P/L. The listed setback depth shall be the average depth where a meandering wall design is approved. The setback requirements shall apply to all frontages including, but not limited to, remainder parcels and sites dedicated for utility purposes. Where public facilities (e.g., sidewalks) are placed on privately-owned setbacks, the applicant shall offer for dedication blanket easements for those purposes. 15. The applicant shall offer for dedication those easements necessary for the placement of, and access to, utility lines and structures, drainage basins, mailbox clusters, park lands, and common areas. 16. Direct vehicular access to Madison Street, Avenue 58, and Avenue 60 from lots with frontage along Madison Street, Avenue 58, and Avenue 60 is restricted, except for those access points identified on the Site Development Permit, or as otherwise conditioned in these conditions of approval. 17. The applicant shall furnish proof of easements, or written permission, as appropriate, from those owners of all abutting properties on which grading, retaining wall construction, permanent slopes, or other encroachments will occur. STREET AND TRAFFIC IMPROVEMENTS 18. The applicant shall comply with the provisions of LQMC Sections 13.24.060 (Street Improvements), 13.24.070 (Street Design - Generally) & 13.24.100 (Access for Individual Properties And Development) for public streets; and Section 13.24.080 (Street Design - Private Streets), where private streets are proposed. 19. Streets shall have vertical curbs or other approved curb configurations that will convey water without ponding and provide lateral containment of dust and residue during street sweeping operations. If a wedge or rolled curb design is approved, the lip at the flowline shall be near vertical with a 1/8" batter and a minimum height of 0.1'. Unused curb cuts on any lot shall be restored to standard curb height prior to final inspection of permanent building(s) on the lot. 20. The applicant shall construct the following street improvements to conform with the General Plan (street type noted in parentheses.) A. OFF-SITE STREETS 1) Madison Street (Modified Secondary Arterial): a. Construct 8-foot wide meandering sidewalk b. Reconstruct the existing landscaped median to provide for full access movements at the primary entry and restore the median landscaping. A left turn deceleration lane for the northbound traffic serving the main project entry shall provide a minimum of 150 feet of vehicle queuing as determined by the traffic study. 2) Avenue 58 (Modified Secondary Arterial): Widen the south side of the street along all frontage to the project boundary to its ultimate width on the south side as specified in the General Plan to accommodate a 12-foot travel lane and a 6-foot shoulder and the requirements of these conditions. Street widening improvements shall include all appurtenant components such as, but not limited to curb, gutter, traffic control striping, legends, and signs. Multi-Use Trail - The applicant shall construct a multi-use trail per La Quinta Standard 260 or as approved by the City Engineer along the Avenue 58 frontage within the landscaped setback. The location and design of the path shall be approved by the City. A split rail fence shall be constructed along the roadway side of the multi-use trail. At grade intersection crossings shall be of a medium and design and location as approved by the Public Works Department on the street improvement plan submittal. Multi-Use Trail will be maintained by the Developer or HOA as applicable. 3) Avenue 60 (Collector): Widen the north side of the street along all frontage to the project boundary to its ultimate width on the north side as specified in the General Plan and the requirements of these conditions. The north curb face shall be located twenty-five feet (25’) north of the centerline. Street widening improvements shall include all appurtenant components such as, but not limited to curb, gutter, traffic control striping, legends, and signs. Construct a 8-foot wide sidewalk The applicant shall extend improvements beyond the subdivision boundaries to ensure they safely integrate with existing improvements (e.g., grading; traffic control devices and transitions in alignment, elevation or dimensions of streets and sidewalks). 4) The applicant shall install traffic signal at the intersection of Madison Street and project’s main access when warrants are met. Applicant is responsible for 100% of the cost to design and installation of the traffic signal. Applicant shall bond for the traffic signal DIF reimbursement amount ($430,000); the security shall remain in full force and effect until the signal is actually installed by the applicant. 5) The applicant shall design and install the traffic signal at the intersection of Madison Street and Avenue 58 when warrants are met. Applicant shall bond for 100% of the traffic signal DIF reimbursement amount ($430,000); the security shall remain in full force and effect until the signal is actually installed by the applicant. The applicant is subject to a maximum of 75% reimbursement from available funds in the City’s Development Impact Fee Program for the cost to design and construct the traffic signal. The applicant shall enter into a DIF Reimbursement Agreement with the City of La Quinta for the reimbursement. 6) The applicant shall pay the fair-share amount listed below (percentage calculated in the Traffic Impact Analysis, Table 9-1) towards the design and construction of the following traffic signals. The cost to design and install a traffic signal is based on the traffic signal DIF reimbursement amount ($430,000). a. Madison Street at Avenue 54 - $38,700 (9% fair-share) b. Jefferson Street at Avenue 54 – $17,200 (4% fair-share) c. Monroe Street at Avenue 60 – $25,800 (6% fair share) d. Monroe Street at Avenue 58 – $47,300 (11% fair share) e. Monroe Street at Airport Boulevard – $25,800 (6% fair share) f. Monroe Street at Avenue 54 – $21,500 (5% fair-share) g. Monroe Street at Avenue 52 – $17,200 (4% fair-share) B. PRIVATE STREETS 1) Streets “A” thru “P” – Construct internal streets per the approved lay-out shown on the Site Development Permit and/or as approved by the City Engineer. Private Residential Streets shall have a minimum 40-foot travel width. The travel width may be reduced to 32 feet with parking restricted to one side, and 24 feet if on-street parking is prohibited, and provided there is adequate off-street parking for residents and visitors, and the applicant establishes provisions for ongoing enforcement of the parking restriction in the CC&R’s. The CC&R’s shall be reviewed and approved by the Design and Development Department prior to recordation. 2) The location of driveways of corner lots shall not be located within the curb return and away from the intersection when possible. 21. All gated entries shall provide for a three-car minimum stacking capacity for inbound traffic to be a minimum length of 62 feet from call box to the street; and shall provide for a full turn-around outlet for non-accepted vehicles. Where a gated entry is proposed, the applicant shall submit a detailed exhibit at a scale of 1" = 10', demonstrating that those passenger vehicles that do not gain entry into the development can safely make a full turn-around out onto the main street from the gated entry. Pursuant to said condition, there shall be a minimum of twenty-five feet width provided at the turn-around opening provided. Two lanes of traffic shall be provided on the entry side of each gated entry, one lane shall be dedicated for residents, and one lane for visitors. The two travel lanes shall be a minimum of 20 feet of total paved roadway surface or as approved by the Fire Department. Entry drives, main interior circulation routes, standard knuckles, corner cutbacks, bus turnouts, dedicated turn lanes and other features shown on the approved construction plans, may require additional street widths as may be determined by the City Engineer. 22. The applicant shall design street pavement sections using CalTrans' design procedure for 20-year life pavement, and the site-specific data for soil strength and anticipated traffic loading (including construction traffic). Minimum structural sections shall be as follows: Residential 3.0" a.c./4.5" c.a.b. Collector 4.0" a.c /5.0" c.a.b. Secondary Arterial 4.0" a.c./6.0" c.a.b. or the approved equivalents of alternate materials. 23. The applicant shall submit current mix designs (less than two years old at the time of construction) for base, asphalt concrete and Portland cement concrete. The submittal shall include test results for all specimens used in the mix design procedure. For mix designs over six months old, the submittal shall include recent (less than six months old at the time of construction) aggregate gradation test results confirming that design gradations can be achieved in current production. The applicant shall not schedule construction operations until mix designs are approved. 24. General access points and turning movements of traffic are limited to the following: A. Madison Street (Primary Entry): Full turn movements in and out are allowed. B. Avenue 60 (South Access): Full turn movements in and out are allowed. C. Avenue 58 (Westerly Access): Full turn movements in and out are allowed. D. Avenue 58 (Easterly Access): Right turn in and right turn out are permitted. Left turn in and left turn out movements out are prohibited. E. Madison Street (just south of Avenue 58): Right turn in and right turn out are permitted. Left turn in and left turn out movements out are prohibited. 32. Improvements shall include appurtenances such as traffic control signs, markings and other devices, raised medians if required, street name signs and sidewalks. Mid-block street lighting is not required. 33. Improvements shall be designed and constructed in accordance with City adopted standards, supplemental drawings and specifications, or as approved by the City Engineer. Improvement plans for streets, access gates and parking areas shall be stamped and signed by qualified engineers. 34. Standard knuckles and corner cut-backs shall conform to Riverside County Standard Drawings #801 and #805, respectively, unless otherwise approved by the City Engineer. 35. The design of parking facilities shall conform to LQMC Chapter 9.150 and in particular the following: A. The parking stall and aisle widths and the double hairpin stripe parking stall design shall conform to LQMC Chapter 9.150.. B. Cross slopes should be a maximum of 2% where ADA accessibility is required including accessibility routes between buildings. C. Building access points shall be shown on the Precise Grading Plans so that ADA accessibility issues can be evaluated. D. Accessibility routes to public streets and adjacent development shall be shown on the Precise Grading Plan. E. Parking space lengths shall be according to LQMC Chapter 9.150 and be a minimum of 17 feet in length with a 2-foot overhang for standard parking stalls and 18 feet with a 2-foot overhang for accessible parking space or as approved by the City Engineer. One van accessible handicapped parking stall is required per 8 handicapped parking stalls. F. Drive aisles between parking spaces shall be a minimum of 26 feet or as approved by the City Engineer. Entry drives, main interior circulation routes, corner cutbacks, bus turnouts, dedicated turn lanes, ADA accessibility route to public streets and other features shown on the approved construction plans, may require additional street widths and other improvements as may be determined by the City Engineer. 36. The applicant shall design street pavement sections using CalTrans' design procedure for 20-year life pavement, and the site-specific data for soil strength and anticipated traffic loading (including construction traffic). Minimum structural sections shall be as follows: Parking Lot & Aisles (Low Traffic) 3.0" a.c./4.5" c.a.b. Parking Lot & Aisles (High Traffic) 4.5” a.c./5.5” c.a.b. Loading Areas 6” P.C.C./4” c.a.b. or the approved equivalents of alternate materials. 37. The applicant shall submit current mix designs (less than two years old at the time of construction) for base, asphalt concrete and Portland cement concrete. The submittal shall include test results for all specimens used in the mix design procedure. For mix designs over six months old, the submittal shall include recent (less than six months old at the time of construction) aggregate gradation test results confirming that design gradations can be achieved in current production. The applicant shall not schedule construction operations until mix designs are approved. 38. Improvements shall include appurtenances such as traffic control signs, markings and other devices, raised medians if required, street name signs and sidewalks. 39. Improvements shall be designed and constructed in accordance with City adopted standards, supplemental drawings and specifications, or as approved by the City Engineer. Improvement plans for streets, access gates and parking areas shall be stamped and signed by engineers registered in California. IMPROVEMENT PLANS As used throughout these Conditions of Approval, professional titles such as “engineer,” “surveyor,” and “architect,” refer to persons currently certified or licensed to practice their respective professions in the State of California. 40. Improvement plans shall be prepared by or under the direct supervision of qualified engineers and/or architects, as appropriate, and shall comply with the provisions of LQMC Section 13.24.040 (Improvement Plans). 41. The following improvement plans shall be prepared and submitted for review and approval by the Public Works Department. A separate set of plans for each line item specified below shall be prepared. The plans shall utilize the minimum scale specified, unless otherwise authorized by the City Engineer in writing. Plans may be prepared at a larger scale if additional detail or plan clarity is desired. Note, the applicant may be required to prepare other improvement plans not listed here pursuant to improvements required by other agencies and utility purveyors. A. On-Site Rough Grading Plan 1" = 40' Horizontal B. PM10 Plan 1” = 40’ Horizontal C. Erosion Control Plan 1” = 40’ Horizontal D. Final WQMP (Plan submitted in Report Form) NOTE: A through D to be submitted concurrently. E. Off-Site Street Improvement/Storm Drain Plan 1" = 40' Horizontal, 1" = 4' Vertical F. Off-Site Signing & Striping Plan 1” = 40’ Horizontal G. On-Site Street Improvements/Signing & Striping/Storm Drain Plan 1" = 40' Horizontal, 1"= 4' Vertical NOTE: E through G to be submitted concurrently. (Separate Storm Drain Plans if applicable) The plans shall utilize the minimum scale specified, unless otherwise authorized by the Public Works Director. Plans may be prepared at a larger scale if additional detail or plan clarity is desired. Note, the applicant may be required to prepare other improvement plans not listed here pursuant to improvements required by other agencies and utility purveyors. H. On-Site Precise Grading Plan 1" = 30' Horizontal Other engineered improvement plans prepared for City approval that are not listed above shall be prepared in formats approved by the City Engineer prior to commencing plan preparation. All Off-Site Plan & Profile Street Plans and Signing & Striping Plans shall show all existing improvements for a distance of at least 200-feet beyond the project limits, or a distance sufficient to show any required design transitions. All On-Site Signing & Striping Plans shall show, at a minimum; Stop Signs, Limit Lines and Legends, No Parking Signs, Raised Pavement Markers (including Blue RPMs at fire hydrants) and Street Name Signs per Public Works Standard Plans and/or as approved by the Engineering Department. “Rough Grading” plans shall normally include perimeter walls with Top Of Wall & Top Of Footing elevations shown. All footings shall have a minimum of 1- foot of cover, or sufficient cover to clear any adjacent obstructions. “On-Site Precise Grading” plans shall normally include all on-site surface improvements including but not limited to finish grades for curbs & gutters, building floor elevations, wall elevations, parking lot improvements and accessibility requirements. 42. The City maintains standard plans, detail sheets and/or construction notes for elements of construction which can be accessed via the “Plans, Notes and Design Guidance” section of the Public Works Department at the City website (www.laquintaca.gov). Please navigate to the Public Works Department home page and look for the Standard Drawings hyperlink. 43. Upon completion of construction, and prior to final acceptance of the improvements by the City, the applicant shall furnish the City with reproducible record drawings of all improvement plans which were approved by the City. Each sheet shall be clearly marked "Record Drawing" and shall be stamped and signed by the engineer or surveyor certifying to the accuracy and completeness of the drawings. The applicant shall have all approved mylars previously submitted to the City, revised to reflect the as-built conditions. The applicant shall employ or retain the Engineer of Record during the construction phase of the project so that the EOR can make site visits in support of preparing "Record Drawing". However, if subsequent approved revisions have been approved by the City Engineer and reflect said "Record Drawing" conditions, the Engineer of Record may submit a letter attesting to said fact to the City Engineer in lieu of mylar submittal. IMPROVEMENT SECURITY AGREEMENTS 44. Prior to constructing any off-site improvements, the applicant shall deposit securities equivalent to both a Performance and Labor & Material Bonds each valued at 100% of the cost of the off-site improvements, or as approved by the City Engineer. 45. Improvements to be made, or agreed to be made, shall include the removal of any existing structures or other obstructions which are not a part of the proposed improvements; and shall provide for the setting of the final survey monumentation. 46. When improvements are phased through a “Phasing Plan,” or an administrative approval (e.g., Site Development Permits), all off-site improvements and common on-site improvements (e.g., backbone utilities, retention basins, perimeter walls, landscaping and gates) shall be constructed, or secured, prior to the issuance of any permits in the first phase of the development, or as otherwise approved by the City Engineer. Improvements and obligations required of each subsequent phase shall either be completed, or secured, prior to the completion of homes or the occupancy of permanent buildings within such latter phase, or as otherwise approved by the City Engineer. In the event the applicant fails to construct the improvements for the development, or fails to satisfy its obligations for the development in a timely manner, pursuant to the approved phasing plan, the City shall have the right to halt issuance of all permits, and/or final inspections, withhold other approvals related to the development of the project, or call upon the surety to complete the improvements. 47. Depending on the timing of the development of this Site Development Permit, and the status of the off-site improvements at the time, the applicant may be required to: A. Construct certain off-site improvements. B. Construct additional off-site improvements, subject to the reimbursement of its costs by others. C. Reimburse others for those improvements previously constructed that are considered to be an obligation of this Site Development Permit. D. Secure the costs for future improvements that are to be made by others. E. To agree to any combination of these actions, as the City may require. Off-Site Improvements should be completed on a first priority basis. The applicant shall complete Off-Site Improvements in the first phase of construction or by the issuance of the 20 % Building Permit. In the event that any of the improvements required for this development are constructed by the City, the applicant shall, prior to the approval of the Final Map, or the issuance of any permit related thereto, reimburse the City for the costs of such improvements. 48. If the applicant elects to utilize the secured agreement alternative, the applicant shall submit detailed construction cost estimates for all proposed on- site and off-site improvements, including an estimate for the final survey monumentation, for checking and approval by the City Engineer. Such estimates shall conform to the unit cost schedule as approved by the City Engineer. Estimates for improvements under the jurisdiction of other agencies shall be approved by those agencies and submitted to the City along with the applicant’s detailed cost estimates. Security will not be required for telephone, natural gas, or Cable T.V. improvements. 49. Should the applicant fail to construct the improvements for the development, or fail to satisfy its obligations for the development in a timely manner, the City shall have the right to halt issuance of building permits, and/or final building inspections, withhold other approvals related to the development of the project, or call upon the surety to complete the improvements. GRADING 50. The applicant shall comply with the provisions of LQMC Section 13.24.050 (Grading Improvements). 51. Prior to occupancy of the project site for any construction, or other purposes, the applicant shall obtain a grading permit approved by the City Engineer. 52. To obtain an approved grading permit, the applicant shall submit and obtain approval of all of the following: A. A grading plan prepared by a civil engineer registered in the State of California, B. A preliminary geotechnical (“soils”) report prepared by a professional registered in the State of California, C. A Fugitive Dust Control Plan prepared in accordance with LQMC Chapter 6.16, (Fugitive Dust Control), and D. An Erosion Control Plan showing Best Management Practices prepared in accordance with LQMC Sections 8.70.010 and 13.24.170 (NPDES Stormwater Discharge Permit and Storm Management and Discharge Controls). E. A WQMP prepared by an authorized professional registered in the State of California. F. A grading bond in a form acceptable to the City, and in an amount sufficient to guarantee compliance with the grading bond requirements. All grading shall conform with the recommendations contained in the Preliminary Soils Report, and shall be certified as being adequate by soils engineer, or engineering geologist registered in the State of California. The applicant shall furnish security, in a form acceptable to the City, and in an amount sufficient to guarantee compliance with the approved Fugitive Dust Control Plan provisions as submitted with its application for a grading permit. Additionally, the applicant shall replenish said security if expended by the City of La Quinta to comply with the Plan as required by the City Engineer. 53. The applicant shall maintain all open graded, undeveloped land in order to prevent wind and/or water erosion of such land. All open graded, undeveloped land shall either be planted with interim landscaping, or stabilized with such other erosion control measures, as were approved in the Fugitive Dust Control Plan. 54. Grading within the perimeter setback and parkway areas shall have undulating terrain and shall conform with the requirements of LQMC Section 9.60.240(F) except as otherwise modified by this condition. The maximum slope shall not exceed 3:1 anywhere in the landscape setback area, except for the backslope (i.e. the slope at the back of the landscape lot) which shall not exceed 2:1 if fully planted with ground cover. The maximum slope in the first six (6) feet adjacent to the curb shall not exceed 4:1 when the nearest edge of sidewalk is within six feet (6’) of the curb, otherwise the maximum slope within the right of way shall not exceed 3:1. All unpaved parkway areas adjacent to the curb shall be depressed one and one-half inches (1.5") in the first eighteen inches (18") behind the curb. 55. Building pad elevations on the rough grading plan submitted for City Engineer’s approval shall conform with pad elevations shown on the preliminary grading plan, unless the pad elevations have other requirements imposed elsewhere in these Conditions of Approval. 56. Building pad elevations of perimeter lots shall not differ by more that one foot higher from the building pads in adjacent developments. Where compliance within the above stated limits is impractical, the City may consider alternatives that are shown to minimize safety concerns, maintenance difficulties and neighboring-owner dissatisfaction with the grade differential. 57. Prior to any site grading or regrading that will raise or lower any portion of the site by more than plus or minus half of a foot (0.5’) from the elevations shown on the approved Site Development Permit, the applicant shall submit the proposed grading changes to the City Engineer for a substantial conformance review. 58. Prior to the issuance of a building permit for any building lot, the applicant shall provide a lot pad certification stamped and signed by a qualified engineer or surveyor with applicable compaction tests and over excavation documentation. Each pad certification shall list the pad elevation as shown on the approved grading plan, the actual pad elevation and the difference between the two, if any. Such pad certification shall also list the relative compaction of the pad soil. The data shall be organized by lot number, and listed cumulatively if submitted at different times. DRAINAGE 59. Stormwater handling shall conform with the approved hydrology and drainage report for the Wave Basin Project (TTM2019-0005 and SDP 2021-0001), or as approve by the City Engineer. Nuisance water shall be disposed of in an approved manner. 60. The applicant shall comply with the provisions of LQMC Section 13.24.120 (Drainage), Retention Basin Design Criteria, Engineering Bulletin No. 06-16 – Hydrology Report with Preliminary Hydraulic Report Criteria for Storm Drain Systems and Engineering Bulletin No. 06-015 - Underground Retention Basin Design Requirements. More specifically, stormwater falling on site during the 100 year storm shall be retained within the development, unless otherwise approved by the City Engineer. The design storm shall be either the 1 hour, 3 hour, 6 hour or 24 hour event producing the greatest total run off. 61. Nuisance water shall be retained on site. Nuisance water shall be disposed of per approved methods contained in Engineering Bulletin No. 06-16 – Hydrology Report with Preliminary Hydraulic Report Criteria for Storm Drain Systems and Engineering Bulletin No. 06-015 - Underground Retention Basin Design Requirements. 62. In design of retention facilities, the maximum percolation rate shall be two inches per hour. The percolation rate will be considered to be zero unless the applicant provides site specific data indicating otherwise and as approved by the City Engineer. 63. The project shall be designed to accommodate purging and blowoff water (through underground piping and/or retention facilities) from any on-site or adjacent well sites granted or dedicated to the local water utility authority as a requirement for development of this property. 64. No fence or wall shall be constructed around any retention basin unless approved by the Community Development Director and the City Engineer. 65. For on-site above ground common retention basins, retention depth shall be according to Engineering Bulletin No. 06-16 – Hydrology Report with Preliminary Hydraulic Report Criteria for Storm Drain Systems. Side slopes shall not exceed 3:1 and shall be planted with maintenance free ground cover. Additionally, retention basin widths shall be not less than 20 feet at the bottom of the basin. 66. Stormwater may not be retained in landscaped parkways or landscaped setback lots. Only incidental storm water (precipitation which directly falls onto the setback) will be permitted to be retained in the landscape setback areas. The perimeter setback and parkway areas in the street right-of-way shall be shaped with berms and mounds, pursuant to LQMC Section 9.100.040(B)(7). 67. The design of the development shall not cause any increase in flood boundaries and levels in any area outside the development. 68. The development shall be graded to permit storm flow in excess of retention capacity to flow out of the development through a designated overflow and into the historic drainage relief route. 69. Storm drainage historically received from adjoining property shall be received and retained or passed through into the historic downstream drainage relief route. 70. The applicant shall comply with applicable provisions for post construction runoff per the City’s NPDES stormwater discharge permit, LQMC Sections 8.70.010 et seq. (Stormwater Management and Discharge Controls), and 13.24.170 (Clean Air/Clean Water); Riverside County Ordinance No. 457; and the California Regional Water Quality Control Board – Colorado River Basin (CRWQCB-CRB) Region Board Order No. R7-2013-0011 and the State Water Resources Control Board’s Order No. 2009-0009-DWQ and Order No. 2010- 0014-DWQ.. A. For post-construction urban runoff from New Development and Redevelopments Projects, the applicant shall implement requirements of the NPDES permit for the design, construction and perpetual operation and maintenance of BMPs per the approved Water Quality Management Plan (WQMP) for the project as required by the California Regional Water Quality Control Board – Colorado River Basin (CRWQCB-CRB) Region Board Order No. R7-2013-0011. B. The applicant shall implement the WQMP Design Standards per (CRWQCB-CRB) Region Board Order No. R7-2013-0011 utilizing BMPs approved by the City Engineer. A project specific WQMP shall be provided which incorporates Site Design and Treatment BMPs utilizing first flush infiltration as a preferred method of NPDES Permit Compliance for Whitewater River receiving water, as applicable. C. The developer / owner shall execute and record a Stormwater Management/BMP Facilities Agreement that provides for the perpetual maintenance and operation of stormwater BMPs. UTILITIES 71. The applicant shall comply with the provisions of LQMC Section 13.24.110 (Utilities). 72. The applicant shall obtain the approval of the City Engineer for the location of all utility lines within any right-of-way, and all above-ground utility structures including, but not limited to, traffic signal cabinets, electric vaults, water valves, and telephone stands, to ensure optimum placement for practical and aesthetic purposes. 73. Existing overhead utility lines within, or adjacent to the proposed development, and all proposed utilities shall be installed underground. All existing utility lines attached to joint use 92 KV transmission power poles are exempt from the requirement to be placed underground. 74. Underground utilities shall be installed prior to overlying hardscape. For installation of utilities in existing improved streets, the applicant shall comply with trench restoration requirements maintained, or required by the City Engineer. The applicant shall provide certified reports of all utility trench compaction for approval by the City Engineer. Additionally, grease traps and the maintenance thereof shall be located as to not conflict with access aisles/entrances. CONSTRUCTION 75. The City will conduct final inspections of habitable buildings only when the buildings have improved street and (if required) sidewalk access to publicly- maintained streets. The improvements shall include required traffic control devices, pavement markings and street name signs. If on-site streets in residential developments are initially constructed with partial pavement thickness, the applicant shall complete the pavement prior to final inspections of the last ten percent of homes within the development or when directed by the City, whichever comes first. LANDSCAPE AND IRRIGATION 25. The applicant shall comply with LQMC Sections 13.24.130 (Landscaping Setbacks) & 13.24.140 (Landscaping Plans). 26. Landscape and irrigation plans for landscaped lots and setbacks, medians, retention basins, and parks shall be signed and stamped by a licensed landscape architect. 27. All new and modified landscape areas shall have landscaping and permanent irrigation improvements in compliance with the City’s Water Efficient Landscape regulations contained in LQMC Section 8.13 (Water Efficient Landscape). 28. Lighting plans shall be submitted with the final landscaping plans for a recommendation to the Planning Manager for his approval. Exterior lighting shall be consistent with LQMC Section 9.100.150 (Outdoor Lighting). All freestanding lighting shall not exceed 18 feet in height, and shall be fitted with a visor if deemed necessary by staff to minimize trespass of light off the property. The illuminated carports shall be included in the photometric study as part of the final lighting plan submittal. 29. All water features shall be designed to minimize “splash”, and use high efficiency pumps and lighting to the satisfaction of the Planning Manager. They shall be included in the landscape plan water efficiency calculations per Municipal Code Chapter 8.13. 30. All rooftop mechanical equipment shall be completely screened from view. Utility transformers or other ground mounted mechanical equipment shall be fully screened with a screening wall or landscaping and painted to match the adjacent buildings. 31. The applicant shall submit the final landscape plans for review, processing and approval to the Community Development Department, in accordance with the Final Landscape Plan application process. Planning Manager approval of the final landscape plans is required prior to issuance of the first building permit unless the Planning Manager determines extenuating circumstances exist which justifies an alternative processing schedule. NOTE: Plans are not approved for construction until signed by the appropriate City official, including the Planning Manager and/or City Engineer. 32. The applicant or his agent has the responsibility for proper sight distance requirements per guidelines in the AASHTO “A Policy on Geometric Design of Highways and Streets, 5th Edition” or latest, in the design and/or installation of all landscaping and appurtenances abutting and within the private and public street right-of-way. 33. The final design of the perimeter landscaping, particularly the perimeter wall, shall be included with the Final Landscape Plan submittal. MAINTENANCE 76. The applicant shall comply with the provisions of LQMC Section 13.24.160 (Maintenance). 77. The applicant shall make provisions for the continuous and perpetual maintenance of perimeter landscaping up to the curb, access drives, sidewalks, multi-use trail, and stormwater BMPs. FEES AND DEPOSITS 78. Permits issued under this approval shall be subject to the provisions of the Development Impact Fee and Transportation Uniform Mitigation Fee programs in effect at the time of issuance of building permit(s). The applicant shall comply with the provisions of LQMC Section 13.24.180 (Fees and Deposits). These fees include all deposits and fees required by the City for plan checking and construction inspection. Deposits and fee amounts shall be those in effect when the applicant makes application for plan check and permits.