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2024-01-09 - AGENDA REPORTS - DBAA 2023-1 TRACT 82126
Agenda Item: 10 1. CITY OF SANTA CLARITA AGENDA REPORT CONSENT CALENDAR 14) CITY MANAGER APPROVAL: ' DATE: January 9, 2024 SUBJECT: DRAINAGE BENEFIT ASSESSMENT AREA RESOLUTION INITIATING PROCEEDINGS, APPROVING AN ENGINEER'S REPORT, AND TAKING OTHER ACTIONS IN CONNECTION WITH TRACT 82126 (BOUQUET CANYON) DEPARTMENT: Neighborhood Services PRESENTER: Darin Seegmiller RECOMMENDED ACTION City Council: Adopt resolutions to initiate proceedings to form a Bouquet Canyon Drainage Benefit Assessment Area 2023-1 to benefit parcels in Tract 82126 and approve the Engineer's Report. 2. Set a public hearing for February 27, 2024, as a time and place to hear comments on this proposed action and close the time period to receive ballots. BACKGROUND On November 10, 2020, the City Council approved the Bouquet Canyon project, Tentative Tract Map 82126, allowing the development of 371 residential units. The Conditions of Approval for this project require the establishment of a homeowner's association or a comparable entity, to fund the continued maintenance of any drainage improvements that are not eligible for transfer to the Los Angeles County Flood Control District for maintenance. The creation of the proposed Drainage Benefit Assessment Area (DBAA) fulfills this requirement. The proposed DBAA 2023-1, Bouquet Canyon, assumes responsibility for administering the maintenance, reporting, monitoring, inspection, storm -damage repair, and cleaning of storm - drain improvements. These include three Continuous Deflection Separation (CDS) systems, along with four filter units, two infiltration basins, two biofiltration basins and one inlet with diversion weir required for Tract No. 82126. The Urban Storm Mitigation Plan (USMP) and the project mitigation measures outlined in the environmental impact report require these devices to Page 1 Packet Pg. 71 minimize the amount of pollutants in urban runoff prior to its discharge into the Santa Clara River. Regular maintenance is required in order for the basins to function correctly within the design parameters. Services required for the assessment district include inspections, removal of silt, trash, and soil debris build-up, maintenance and repairs, and an annual assessment and engineer's report review. The Engineer's Report contains the proposed boundaries of DBAA 2023-1, identifies the proposed facilities and services to be funded, determines the general and special benefits received by properties, and the methodology to apportion the annual assessments. All parcels were established concurrently to the conditions set forth for the continued maintenance of landscape and infrastructure improvements, and as a result, each parcel within DBAA 2023-1 receives a special and distinct benefit from these improvements. The maximum annual assessment to maintain the improvements associated with DBAA 2023-1 will be $97,935. Based on the number of units approved for construction, the annual assessment will be $294.77 per Equivalent Benefit Unit (EBU). Parcels identified as single-family residences and Townhomes/Condominiums are assessed at 1.00 EBU per dwelling unit. Vacant parcels are assessed at a rate of .50 EBU's per planned residential unit for the property or 1.00 EBU per acre if the number of planned residential units is unknown. The maximum assessment rate will adjust each year based on the annual change in the Consumer Price Index (CPI), all Urban Consumers, for the Los Angeles Riverside -Orange County Area CPI. The actual assessment levied in any fiscal year will be approved by the City Council and may not exceed the maximum assessment rate. If approved, the City will begin levying properties commencing in Fiscal Year 2024-25. ALTERNATIVE ACTION 1. Do not adopt a resolution to initiate formation of DBAA 2023-1. 2. Other direction as determined by the City Council. FISCAL IMPACT All expenses associated with the Drainage Benefit Assessment Area will be borne by the developer. There will be no fiscal impacts to the General Fund. ATTACHMENTS DBAA Formation 2023-1 Initiation Resolution Resolution of Intent for DBAA 2023-1 DBAA 2023-1 Maintenance Exhibit (available in the City Clerk's Reading File) DBAA 2023-1 Engineer's Report (available in the City Clerk's Reading File) Page 2 Packet Pg. 72 10.a RESOLUTION NO. 24- C� A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF m SANTA CLARITA, CALIFORNIA, INITIATING PROCEEDINGS FOR THE FORMATION r OF DRAINAGE BENEFIT ASSESSMENT AREA NO. 2023-1, BOUQUET CANYON, c TRACT NO. 82126; AND THE LEVY AND COLLECTION OF ASSESSMENTS RELATED "' THERETO COMMENCING WITH FISCAL YEAR 2024-2025 7P WHEREAS, the City Council pursuant to the provisions of the Benefit Assessment Act of 1982, Chapter 6.4, Division 2, Title 5 of the Government Code of the State of California commencing with Section 54703 (Act) desires to initiate proceedings for the formation of Drainage Benefit Assessment Area No. 2023-1, Bouquet Canyon, Tract No. 82126 (DBAA 2023-1); and to levy and collect annual assessments to pay for the operation, maintenance and servicing of drainage improvements and appurtenant facilities related thereto; and WHEREAS, the boundaries of the DBAA 2023-1 shall be as described on the maps on file with the City and in the Engineer's Report, and incorporated herein by reference; and WHEREAS, the City has approved a consulting engineer contract with Willdan, naming Willdan as the Assessment Engineer and firm responsible for preparing the Engineer's Report and assisting in the adjustment of the maximum assessment for parcels within DBAA 2023-1. NOW, THEREFORE, the City Council of the City of Santa Clarita, California, does hereby resolve as follows: SECTION 1. The above recitals are true and correct. SECTION 2. The City Council hereby orders Willdan, an engineer registered pursuant to the Professional Engineers Act (Chapter 7, commencing with Section 670, of Division 3 of the Business and Professions Code), has been designated Assessment Engineer for the proposed formation of DBAA 2023-1 (District). Willdan is hereby ordered to prepare and file an Engineer's Report for the City Council's review, consideration and adoption in accordance with the Act and the laws of the State of California. SECTION 3. The purpose of this District is to fund the activities necessary to fund the ongoing maintenance and servicing of the drainage improvements within the District that is for the benefit of properties therein and that have been required for the development of such properties to their full and best use. The maintenance and operation of these improvements may include but are not limited to all materials, equipment, labor, and incidental expenses deemed necessary to keep the drainage improvements and facilities in satisfactory condition as well as the collection of assessment installments for the periodic service activities, repair, or refurbishments of the improvements. Detailed maps and descriptions of the location and extent of the specific improvements to be maintained by the District are on file at the Environmental Services Department of the City of Santa Clarita, and by reference these plans and specifications are made part of this resolution. SECTION 4. The territory of land within the proposed District includes all lots and parcels of land within the residential development known Bouquet Canyon, Tract No. 82126 Page 1 of 2 Packet Pg. 73 10.a within the City of Santa Clarita, the County of Los Angeles, State of California, and is generally CY situated south and east of Copper Hill Drive and north and south of Bouquet Canyon Road. The territory of land within DBAA 2023-1 includes parcels identified by the Los Angeles County m Assessor's Office as Assessor Parcel Numbers Book 2812, page 008, Parcels 2, 3, 8-13, 21, 22, r 25, 31, 900 and 901; page 022, Parcel 31; and Page 038, Parcel 2; and shall include all c subsequent subdivisions, lot line adjustments or parcel changes therein. "' SECTION 5. This resolution shall take effect immediately. SECTION 6. The City Clerk shall certify to the passage and adoption of this resolution; shall cause the same to be entered in the book of resolutions of the City and shall make a minute of the passage and adoption thereof in the records of the proceedings of the City Council of the City in the minutes of the meeting at which the same is presented. PASSED, APPROVED AND ADOPTED this 9th day of January, 2024. MAYOR ATTEST: CITY CLERK DATE: STATE OF CALIFORNIA ) COUNTY OF LOS ANGELES ) ss. CITY OF SANTA CLARITA ) I, Mary Cusick, City Clerk of the City of Santa Clarita, do hereby certify that the foregoing Resolution No. 24- was duly adopted by the City Council of the City of Santa Clarita at a regular meeting thereof, held on the 9th day of January, 2024, by the following vote: AYES: COUNCILMEMBERS: NOES: COUNCILMEMBERS: ABSENT: COUNCILMEMBERS: CITY CLERK Page 2 of 2 Packet Pg. 74 10.b z RESOLUTION NO. 24- z a U A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF SANTA CLARITA, CALIFORNIA, DECLARING THE CITY' S INTENTION TO FORM DRAINAGE BENEFIT ASSESSMENT AREA NO. 2023-1, LEVY ASSESSMENTS, PRELIMINARILY APPROVING AN ENGINEER'S REPORT, AND CALLING FOR A PROPERTY OWNER m PROTEST PROCEEDING TO SUBMIT TO THE QUALIFIED PROPERTY OWNERS THE QUESTION OF LEVYING SUCH ASSESSMENTS FOR SAID FORMATION PURSUANT M N O TO THE PROVISIONS OF THE CALIFORNIA CONSTITUTION, ARTICLE XII1D `" WHEREAS, the City Council of the City of Santa Clarita (City) has initiated proceedings to form Drainage Benefit Assessment Area No. 2023-1(DBAA 2023-1); pursuant to the provisions of the Benefit Assessment Act of 1982, Chapter 6.4, Division 2, Title 5 of the Government Code of the State of California commencing with Section 54703 (Act) to fund the costs of servicing and maintenance of improvements within the newly formed drainage areas; and WHEREAS, the proposed newly formed district be designated as DBAA 2023-1; and WHEREAS, the boundary of DBAA 2023-1 shall be as described on the maps previously presented to this City Council and on file with the City Clerk, and are proposed to include the map presented in the Engineer's Report and additional maps on file with the City provided by the developer in connection with DBAA 2023-1; and WHEREAS, the Assessment Engineer, Willdan, has filed with the City Clerk of the City and the City Clerk has presented to the City Council a report (Engineer's Report), regarding the proposed formation of DBAA 2023-1. Section 54710 of the Government Code section outlines the rules and regulation of the Act; and WHEREAS, the Engineer's Report has been duly presented by the City Clerk for consideration and has been fully considered by the City Council. NOW THEREFORE, the City Council of the City of Santa Clarita, California, does hereby resolve as follows: SECTION 1. Engineer's Report, Content: The Engineer's Report, as presented, consists of the following: The Plans and Specifications which describe the boundaries of DBAA 2023-1, and the improvements associated therewith that provide special benefits to the parcels therein. The Method of Apportionment details the method of calculating proportional special benefit and the annual assessment obligation for each affected parcel. The Estimate of Improvement Costs including the calculation of the assessments and the estimated annual funding (Budget) required for the annual maintenance, servicing, and operation of drainage improvements and specifically the costs associated with the improvements Page 1 of 4 Packet Pg. 75 10.b z determined to be of special benefit to parcels within the Annexation Territory establishing the z proposed maximum assessment.LU v The proposed maximum assessments shall be presented to the property owner(s) of record in a protest ballot proceeding pursuant to the California Constitution Article XIIID. CY O A formation diagram outlining the boundaries of the annexation territory. °r 0 An assessment roll containing the maximum assessments and proposed assessments as of N the date of the report for each assessor parcel number within DBAA 2023-1. p SECTION 2. Engineer's Report, Approval: The Engineer's Report is hereby approved on a preliminary basis as submitted or amended by direction of this City Council and is hereby ordered to be filed in the Office of the City Clerk as a permanent record and to remain open to public inspection. SECTION 3. Intention: The City Council hereby declares its intention to form the drainage area known as Bouquet Canyon, Tract No. 82126 and to levy and collect annual assessments against parcels of land within DBAA 2023-1, commencing with Fiscal Year (FY) 2024-2025 in accordance with the Act and the provisions of the California Constitution Article XIIID. The territory being formed shall subsequently be designated as Drainage Benefit Assessment Area No. 2023-1. SECTION 4. Annexation Territory: The City Council hereby finds that proposed territory within the DBAA 2023-1 consists of all lots, parcels, and subdivisions of land within the planned and existing residential area identified as Parcel Map Book 2812: Page 008 Parcels 2, 3, 8 through 13, 21, 22, 25, 31, 900, and 901, Page 022 Parcel 31, and Page 038 Parcel 2, and that this area includes all properties that receive special benefits from the improvements provided. SECTION 5. Improvements: The proposed improvements and services for the Annexation Territory, include installation, construction, or maintenance of any authorized improvements under the Act, including, but not limited to, drainage improvements and any facilities that are appurtenant to any of the aforementioned or that are necessary or convenient for the maintenance or servicing thereof. The Engineer's Report, prepared in connection with the annexation territory, provides a more detailed description of the improvements and services to be provided and for which properties shall be assessed, and by reference that Engineer's Report is made part of this resolution. SECTION 6. Assessments: The City Council hereby determines that to provide the improvements described in Section 5 of this resolution, it is necessary to levy and collect assessments against lots and parcels within the annexation territory commencing in FY 2024- 2025. The Engineer's Report referred to in Section 1 of this resolution establishes the initial maximum assessment rate and an estimate of maximum assessments necessary to provide for the annual operation, administration, services, and maintenance of the improvements. SECTION 7. Compliance with the Constitution: Pursuant to California Constitution Article XIIID, an assessment ballot proceeding is hereby called on the matter of confirming the proposed new assessments for DBAA 2023-1. The ballots and notices so authorized shall be Page 2 of 4 Packet Pg. 76 10.b distributed by first class mail to the property owners of record as of the last County equalized z z roll, and each property owner may return the ballot by mail or in person to the City Clerk no later v than the conclusion of the public hearing for this matter. w While provisions of the California Constitution Article XIIID require that the City CY conduct a public hearing not less than 45 days after mailing a notice of the proposed assessment m to record owners of each parcel which will have a special benefit conferred upon them and upon which an assessment will be imposed, California Civil Code, Section 3513, allows anyone to N waive the advantage of a law intended solely for their benefit, and the 45 day mailed ballot N period before the scheduled public hearing is not established for a public reason, but is solely for d z the advantage of the parcels having a special benefit conferred upon them and which an a assessment will be imposed. LU W SECTION 8. Mailed Notice and Ballot: The City Council hereby authorizes and directs the City Clerk or their designee to prepare and mail the Notice of Public Hearing, and in the same or separate mailing, mail the property owner protest ballot(s) to the subject property owner regarding the proposed levy of assessments and the assessment range formula outlined in the Engineer's Report, for return receipt prior to the date and time of the public hearing set forth in this resolution. SECTION 9. Public Hearing: The City Council hereby declares its intention to conduct a public hearing concerning DBAA 2023-1, the improvements, and the levy of assessments notice is hereby given that on Tuesday, February 27, 2024, at 6:00 PM the City Council will hold a public hearing for the formation of DBAA 2023-1 and the levy and collection of assessments related thereto commencing in FY 2024-2025, or as soon thereafter as feasible. The public hearing will be held in the City Council Chambers, located at 23920 Valencia Boulevard, in the City of Santa Clarita, California, at the time so fixed. At the public hearing, all interested persons shall be afforded the opportunity to hear and be heard. SECTION 10. Determination of Majority Protest: The property owner protest ballot proceeding conducted for the Annexation Territory shall constitute the property owner's approval or rejection of the annual levy of assessments and assessment range formula. The property owner may return the ballot by mail or in person to the City Clerk no later than the conclusion of the public hearing on Tuesday, February 27, 2024. After the close of the public hearing, pursuant to Section 4, Sub -Section 4 (e) of the California Constitution, the City shall tabulate the ballots returned to determine if majority protest exists. The ballots shall be weighted according to the proportional financial obligation of the affected property. Majority protest exists if, upon the conclusion of the hearing, ballots submitted in opposition to the assessment exceed the ballots submitted in favor of the assessment. SECTION 11. This resolution shall take effect immediately. SECTION 12. The City Clerk shall certify to the adoption of this resolution. Page 3 of 4 Packet Pg. 77 10.b PASSED, APPROVED AND ADOPTED this 91h day of January, 2024. MAYOR ATTEST: CITY CLERK DATE: STATE OF CALIFORNIA ) COUNTY OF LOS ANGELES ) ss. CITY OF SANTA CLARITA ) I, Mary Cusick, City Clerk of the City of Santa Clarita, do hereby certify that the foregoing Resolution No. 24- was duly adopted by the City Council of the City of Santa Clarita at a regular meeting thereof, held on the 91h day of January, 2024, by the following vote AYES: COUNCILMEMBERS: NOES: COUNCILMEMBERS: ABSENT: COUNCILMEMBERS: Page 4 of 4 CITY CLERK z O z a U H W C� O m M N O N Packet Pg. 78 1� LINE B 4' LINE , C L' BASIN 200 aAsIll '�s Vi�% 21 , LINE .G NE"( FINE E LlK LI N E 'H 2 - LINE -1-3" Z SHEET 5 LINED. L "I V Ll' BASIN 400 ,�Nl LTERRAS FILI UBRAS 8, -0\M FTOW CHANNEL L :A LINE N ",-2 N A5 1 10) IDS tii 'T CDS h2 City of Santa Claiita Environmental Services Division LEGEND: Sipature Ekft INVITATION SAIIN Y'Ll" bINI!LTR,,T ON BASIN .210 pfc,l, - RAT ION BA"P,' #30(; INrIFRA-10IN BASIN R(P/PVC PIPE TO BNISINTAIII BY )BY' US L N -1 10 M MAIN TAIND BY L SAA - (1010 LINE "F-1" �/ \ y/ RF PER MTD 187E RAS #3 & 44 FIL,ITEM \ (J h R NOT TO BE MAINTAINED BY DBAA 1 #3 FIR WATER QUALITY (SHT 3) (TO BE VACATED) f WEIR STRUCTURE _ LINE "F" ITEM 1 PER MTD 1879 PER LOW FLOW - NOT TO BE MAINTAINE BY DBAA #1 (SHT 2) OUTLET STRUCTURE - -- ITEM 4 PER LOW FLOW -.�- = LOW FLOW DRAIN-1 LOW FLOW DRAIN-1 --- (SHT 2) 4' X 4' RCB 6' X 4' RCB _ ITEM 3 ITEM 2 PER LOW FLOW PER LOW FLOW _ ACCESS ROAD (SHT2 (SHT 2) Q4�, OUTLET STRUCTURE @�� ITEM 2� PER MTD 1879 (SHT 9) # 12 ACCESS ROAD LINE 'G-5, 12" PVC+CLEANOUT DIVERTER MANHOLE Qty, ITEM 3 OUTLET STRUCTURE ITEM 1 PER MTD 1879. PER GRADING PLAN ITEM 4 SHT 16} `ec PER STREET IMPROVEMENT (SHT 9) (SHT 16) LOW FLOW DRAIN-2 - 24" RCP ITEM 2 #2 - PER STREET IMPROVEMENT (SHT 16) y INFILTRATION BASIN #100 ppQ ITEM 5 SCALE I'-80' - (Z PER WATER QUALITY (BHT 2) Ja 47 / LINE "A" PER MTD 1879 � NOT TO BE MAINTAINED BY DBAA LEGEND: ©A T:5-a-2022 '"� A::t •c-` DBAA MAINTENANCE EXHIBIT RCP/PVC PIPE TO BE MAINTAINED BY DBAA L E N N A R' _ Q CDS UNIT TO BE MAINTAINED BY DBAA LENNAR HOMES OF CALIFORNIA. M ,� S�KAN� TENTATWE TRACT MAP NO. 82126 NFILTRATION BASIN LLC , . , _„ , ._ SANTA CLARTTA, CA - 2000, FIVE POINT, SUITE 365 = .. , IRVINE, CA 92618 5117-006 2 .. 6 ---- i O z c9 � Ll1 7 LINE "B•4" 12" PVC ITEM 5 LINE "B" RISER PO O PER MTD 1879 NOT TO BE MAINTAINED BY DBAA ITEM 6 PER WATER QUALITY J (SHT 2) BIOFILT.RATION BASIN #200 X / ITEM 2 GATE PER WATER QUALITY ITEM 9- �SI-Jj_ PER W JQ , 4,p % "C" LINE PER MTD 1879 t # � ! NOT TO BE MAINTAINED BY DBAA , j TUBULAR STEEL KEIFCE ITEM 8 PER WATER QUALITY OUTLI[T STR`UC uRE ITEM 3 PER MTD 187 (SHT 6) I I I I � I LEGEND: RCP/PVC PIPE TO BE MAINTAINED BY DBAA O CDS UNIT TO BE MAINTAINED BY DBAA BIOFILTRATION BASIN LINE "C-3" 18" RCP ITEM 4 PER MID 1879 (SHT 6) CATCH BASINS ITEM 7 PER MTD 1679 (SHT 6) DIVERTER MANHOLE ITEM 1 PER MTD 1879 (SHT 6) CDS UNIT ITEM 1 PER WATER QUALITY (SHT 2) B00auET CANYpN RpAD #5 LINE "A-5" PER MTD 1879 NOT TO BE MAINTAINED BY DBAA SCALE, 1"=80' OA 7E 5-3-2022 DBAA MAINTENANCE EXHIBIT L E N N A R LENNAR HOMES OF CALIFORNIA, LLG SIKAND TENTATIVE TRACT MAP NO. 82126 - SANTA CLARITA, CA 7.000 FIVE POINT, SU`TE 365 �� ,. , IRVINE. GA 92618 - - - 5117-006 E` 8 " 5 tt ltvnlsnl-mt4Fr►s.1�w�-usar�ina FILTERRAS #1 & #2 ITEM 1 PER WATER QUALITY (SHT 3) 1 rr—rnlrl. KIVEHGLEN RD --- #6 STORM DRAIN LINE "D" PER &4TD 1879 NOT TO BE MAINTAINED BY DBAA CATCH BASIN ITEM 7 PER WATER QUALITY (SHT 2) WATER QUALITY LINE "A" --� -- -- - 12" PVC --"- - — ITEM PER WATER QUALITY (SHT 2) CATCH BASIN ITEM 7 PER WATER QUALITY (SHT 2) RCP/PVC PIPE TO BE MAINTAINED BY DBAA C) CDS UNIT TO BE MAINTAINED BY DBAA LE N N A R BIOFILTRATION BASIN LENNAR HOMES OF CALIFORNIA, LLC SCALE.. 1'=80' 2000 FIVE POINT, SUITE 365 IRVINE, CA 92618 nF .ei av ►- SIKAND FENCE ITEM 8 PER WQ STORM DRAIN LINE "D" 24" RCP TEM 5 PER MTD 1879 (SHT 7 RISER �ASIN#400) \� ITEM 4 = PER WATER QUALITY (SHT 2) OUTLET STRUCTI)RE ITEM 3 PER WATER QUALITY\ SHT 2) BIOFILTRATION BASIN #400 ITEM 2 \ PER WATER QUALITY (SHT 2) DAMS-3-2022 DBAA MAINTENANCE EXHIBIT TENTATNE TRACT MAP NO, 82126 SANTA CLARITA, CA 4 5 p �wnlsnws Y+eulor�+wn• R'vomirearo LINE -H-2" 18"RCP Z# 15 ITEM 1 PER MTD 1879 (SHT 9) LOW FLOW CATCH BASIN ITEM 2 PER MTD 18ZV #14 LINE H-11" 18" RCP ITEM 1 LINE "H" — 24" RCP ITEM 3", PER MTD 1879 (SHT 9) CIDS UNIT ITEM I PER WATER QUALITY (SHT 2) nivrPTPP MANHO TUBULAR STEEL FENCEe'(SH I.9T.1 ITEM 6 OUTLET STROCTURE GATE ITEM 4 ITEM 7 PER MTD 1579 PER WATER QUALITY (SHT 9) OUTLET STRUCTURE . ITEM 2 PER MTD 1879 (BHT 6) #8 LINE "G- 36" RCP ITEM I PER MTD 1879 (BHT 6) INLET STRUCTURE ITEM 3 PER MTD 1879 (SET 6) RCP/PVC PIPE TO BE MAINTAINED BY DBAA CDS UNIT TO BE MAINTAINED BY DBAA INFILTRATION BASIN I ITEM b LINE "H-3'#16 MTD 187191 181, RCP (SHT 9) ITEM 1 PER MTD 1879 (BHT 9) OUTLET STRUCTURE -#13 ITEM 2 PER MTD 1879 (SHT 9) NFILTRATJON BASIN #300 TLET STRUCTURE ITEM 2 ITEM 2 PER WATER QUALITY PER MTD 1879 (SHT 2) (SHT 9) ACCESS ROAD INLET STRUCTURE ITEM 3 OUTLET STRUCTURE OUTLET STRUCTURE OUTLET STRUCTURE PER MTD 1B79 ITEM 2 ITEM 2 ITEM 2 (SHT 6) PER MTD 1879 PER MTD 1879 PER MTD 1879 LINE 'F' #7 (SHT 9) (SHT 9) 1 (SHT 9) 4'X4'RCB ITEM 1 PER MTD 1879 ACCESS ROAD (SHT 6) LINE `G-2" #9 #10 LINE "G-3"' # 11 LINE "G-4' OUTLET STRUCTURE ITEM 2 36" RCP,CLEANOUT 12" PVC,CLEANOUT 12" PVC+CLEANOUT PER MTD 1879 ITEM 1 PER MTD 1879 ITEM I ITEM I (SHT 6) PER MTD 1879 PER MTD 1879 (BHT 9) (SHT 9) (SHT 9) DBAA MAINTENAN LEIMIMAR' LENNAR HOMES OF CALIFORNIA, LLC 9m SIKAND TENTATWE TRACT M, SANTA CLAW E SCALI �-80' 2000 FIVE POINT, SUITE 365 =1 IRVINE CA926112 5117-006 WE:5-3-2022 I CITY OF SANTA CLARITA ENGINEER'S REPORT Proposed Formation of Drainage Benefit Assessment Area No. 2023-1 (Bouquet Canyon - Tract No. 82126) Establishment of Annual Assessments Commencing Fiscal Year 2024-2025 Intent Meeting: January 9, 2024 Public Hearing: February 27, 2024 CITY OF SANTA CLARITA 23920 VALENCIA BOULEVARD SANTA CLARITA, CA 91355 PREPARED BY WILLDAN FINANCIAL SERVICES UPDATED OCTOBER 2023 W WILLDAN CITY OF SANTA CLARITA DRAINAGE BENEFIT ASSESSMENT AREA (Bouquet Canyon - Tract No. 82126) ENGINEER'S REPORT CERTIFICATE This Report describes the proposed formation of Drainage Benefit Assessment Area ("DBAW) 2023-1, Bouquet Canyon, Tract 82126 (DBAA) including the improvements, budgets, parcels, and assessments to be levied for Fiscal Year 2024-2025, as they existed at the time of the passage of the Resolution of Intention. Reference is hereby made to the Los Angeles County Assessor's maps for a detailed description of the lines and dimensions of parcels within the DBAA. The undersigned respectfully submits the enclosed Report as directed by the City Council. Dated this day of , 2024. By: By: Stacee Reynolds Tyrone Peter Principal Consultant R. C. E. # C81888 District Administration Services I HEREBY CERTIFY that the enclosed Engineer's Report, together with the Assessment Roll and Assessment Diagrams thereto attached was filed with me on the day of , 2024. By: Mary Cusick, City Clerk City of Santa Clarita Los Angeles County, California I HEREBY CERTIFY that the enclosed Engineer's Report, together with the Assessment Roll and Assessment Diagrams thereto attached was approved and confirmed by the City Council of the City of Santa Clarita, California, on the day of , 2024. By: Mary Cusick, City Clerk City of Santa Clarita Los Angeles County, California TABLE OF CONTENTS INTRODUCTION.............................................................................................................1 PART I — PLANS AND SPECIFICATIONS...................................................................3 PROPERTIES WITHIN THE DISTRICT...................................................................... 3 FUNDING AUTHORIZED BY THE 1982 ACT............................................................ 3 IMPROVEMENTS AND SERVICES.......................................................................... 3 DRAINAGE MAINTENANCE.................................................................................. 4 PART II — METHOD OF APPORTIONMENT................................................................5 BENEFIT ANALYSIS............................................................................................ 5 ASSESSMENT METHODOLOGY............................................................................ 5 Equivalent Benefit Units.......................................................................6 Proposed Land Use Tract 82126.......................................................... 7 Assessment Calculations..................................................................... 7 ASSESSMENT RANGE FORMULA......................................................................... 7 PART III — DISTRICT BUDGETS..................................................................................9 Capital Replacement Reserve............................................................12 PART IV — DISTRICT DIAGRAM................................................................................13 PART V — ASSESSMENT ROLL................................................................................15 Engineer's Report City of Santa Clarita Drainage Benefit Assessment Area No. 2023-1 (Bouquet Canyon - Tract No. 82126) INTRODUCTION Pursuant to the provisions of the Benefit Assessment Act of 1982, being Chapter 6.4 of the California Government Code, commencing with Section 54703 (hereafter referred to as the 1982 Act"), and in compliance with the substantive and procedural requirements of the California State Constitution Article XIIID (hereafter referred to as the "California Constitution"), the City Council of the City of Santa Clarita, County of Los Angeles, State of California (hereafter referred to as "City"), propose to form and levy special benefit assessments for the district to be designated as: Drainage Benefit Assessment Area No. 2023-1 (Bouquet Canyon - Tract No. 82126) (hereafter referred to as "DBAA"), which includes all lots and parcels of land within Tract No. 82126 that will receive special benefit from the drainage improvements installed and maintenance in connection with the development of these residential subdivisions within the City limits of Santa Clarita. This Engineer's Report (hereafter referred to as "Report") has been prepared in connection with the formation of said District and the levy and collection of annual assessments related thereto commencing in fiscal year 2024-2025, as required pursuant to Section 54716 of the 1982 Act. The City Council proposes to form the District, and levy and collect annual assessments on the County tax roll to provide ongoing funding for the costs and expenses required to service and maintain drainage improvements and appurtenant facilities that are necessary and essential requirements for the development of the properties within the District to cause the protection of those properties and the surrounding ecological environment from flooding. The improvements to be provided by the District and the assessments described herein are made pursuant to the 1982 Act and the substantive and procedural provisions of the California Constitution. The formation of this District and the assessments described herein will provide a funding source for the continued operation and maintenance of the drainage improvements that are directly associated with the development of properties within the District and for the special benefit of those properties. The budgets and assessments described in this Report are based on the planned improvements and development requirements associated with Tract No. 82126. The budgets described herein, represent an estimate of the direct expenditures, incidental expenses, and fund balances that will be necessary to ensure proper maintenance, servicing and funding needs to support the drainage improvements that provide special benefit to properties within the District. The word "parcel," for the purposes of this Report, refers to an individual property assigned its own Assessor's Parcel Number (APN) by the Los Angeles County Assessor's Office. The Los Angeles County Auditor -Controller uses APNs and specific Fund Numbers to identify properties to be assessed on the tax roll for the special benefit assessments. As part of this District formation, the City shall conduct a property owner protest ballot proceeding for the proposed levy of a new assessment pursuant to the provisions of the California Constitution, Article MID Section 4. In conjunction with this ballot proceeding, the City Council will conduct a public hearing to consider public testimonies, comments and written protests regarding the formation of the District and levy of assessments. Upon conclusion of the public hearing, property owner protest ballots received will be opened and tabulated to determine whether majority protest exists (ballots shall be weighted based on the calculated proportional assessment amount for each benefiting parcel), and by resolution the City Council will confirm the results of the ballot tabulation. If majority protest exists, proceedings for the formation of the District and the levy of the proposed assessments shall be abandoned. If tabulation of the ballots indicates that majority protest does not exist for the proposed assessments and the assessment range formula presented and described herein, the City Council may approve the Report (as submitted or amended), order the formation of the District, and approve the levy and collection of assessments. In such case, the assessments for fiscal Page 1 *"W I LLDAN Engineer's Report City of Santa Clarita Drainage Benefit Assessment Area No. 2023-1 (Bouquet Canyon - Tract No. 82126) year 2024-2025 shall be submitted to the Los Angeles County Auditor -Controller for inclusion on the property tax roll for each parcel. Each subsequent fiscal year, a Report shall be prepared and presented to the City Council describing any changes to the improvements, the proposed services, the annual budget and assessments for that fiscal year, and the City Council shall hold a noticed public hearing regarding these matters prior to approving and ordering the proposed levy of assessments. This Report consists of five (5) parts. PartI Plans and Specifications: A description of the District boundaries and the proposed improvements associated with the District. The District is being formed with a single benefit zone encompassing all properties within the territory identified as Drainage Benefit Assessment Area No. 2023-1 (Tract No. 82126). Part II Method of Apportionment: A discussion of benefits the improvements and services provide to properties within the District and the method of calculating each property's proportional special benefit and annual assessment. This section also identifies and outlines an Assessment Range Formula that provides for an annual adjustment to the maximum assessment rate that establishes limits on future assessments, but also provides for reasonable cost adjustments due to inflation without the added expense of additional property owner protest ballot proceedings. Part III District Budget: An estimate of the annual costs to operate, maintain and service drainage improvements related to the properties within the District. This budget includes an estimate of anticipated direct maintenance costs and incidental expenses including, but not limited to administration expenses and the collection of appropriate fund balances to establish an initial maximum assessment to be approved by the property owners of record. The special benefit maximum assessment proposed for this District is based on an estimate of the annual maintenance and operational expenses at full build out of the improvements. The proposed assessments for the first fiscal year (2024- 2025), and each subsequent year shall be based on the estimated net annual cost of operating, maintaining and servicing the District improvements for that fiscal year. The proposed maximum assessment (Rate per Equivalent Benefit Unit) identified in the budget of this Report establishes the initial maximum assessment rate for the District in fiscal year 2024-2025 and shall be adjusted annually by the Assessment Range Formula described in the method of apportionment. Part IV District Diagram: A Diagram showing the exterior boundaries of the District is provided in this Report and includes all parcels that will receive special benefits from the improvements. Parcel identification, the lines and dimensions of each lot, parcel and subdivision of land within the District, are inclusive of all parcels as shown on the Los Angeles County Assessor's Parcel Maps as they existed at the time this report was prepared and includes all subsequent subdivisions, lot line adjustments or parcel changes therein. Reference is hereby made to the Los Angeles County Assessor's maps for a detailed description of the lines and dimensions of each lot and parcel of land within the District. Part V Assessment Roll: A listing of the proposed assessment amount to be presented to the property owners of record during the protest ballot proceedings required pursuant to the provisions of the California Constitution. The proposed assessment amount for each parcel is based on the parcel's proportional special benefit as outlined in the method of apportionment and the proposed initial maximum assessment rate. Page 2 *"W I LLDAN Engineer's Report City of Santa Clarita Drainage Benefit Assessment Area No. 2023-1 (Bouquet Canyon - Tract No. 82126) PART I - PLANS AND SPECIFICATIONS PROPERTIES WITHIN THE DISTRICT Drainage Benefit Assessment District No. 2023-1, will consist of five (5) previously built residential properties along with Tract No. 82126 slated for three hundred seventy-one (371) residential properties (196 Single Family Residential Units and 175 Townhomes/Condominiums) with associated private streets, storm drain, utilities, and landscaping. commented [KK11: will nave sikand confirm one more time The purpose of the District is to ensure the ongoing maintenance, operation, and servicing of drainage improvements installed in connection with development of properties within the District. This District will provide the financial mechanism (annual assessments) by which the ongoing operation and maintenance of these improvements will be funded. The District structure, proposed improvements, method of apportionment and assessments described in this Report are based on current development and improvement plans including all estimated direct expenditures, incidental expenses, and reserves associated with the maintenance and servicing of the improvements. The District is located within the boundaries of the City of Santa Clarita, generally situated along Bouquet Canyon Road. FUNDING AUTHORIZED BY THE 1982 ACT As generally defined by the Benefit Assessment Act of 1982 and applicable to this District, the City may impose a benefit assessment to finance the maintenance and operation costs of the following services: 1) Drainage; and 2) Flood Control. In addition to imposing a benefit assessment for the annual maintenance and operation of the District improvements, the City may also authorize an assessment or utilize existing assessment revenues to finance the installation, construction or replacement of drainage and flood control facilities. While such activities are permitted under the 1982 Act, the budget and assessments for this District only provide for normal maintenance and operation of the improvements. Since most major rehabilitation/construction projects result from unforeseen damages, the extent and cost of such projects are not easily predicted and to accumulate funds as part of the normal annual assessments is not practical. If such funding becomes necessary, the City may present a new or increased assessment to the property owners to support such projects. IMPROVEMENTS AND SERVICES The purpose of this District is to fund the activities necessary to maintain and service the corresponding drainage improvements required of properties within the District. The maintenance and operation of these improvements may include but are not limited to all materials, equipment, labor, and incidental expenses deemed necessary to keep these improvements in satisfactory condition, as well as the collection of assessment installments for periodic service activities, repair or rehabilitation of various improvements and facilities (not capital improvements expenditures or replacement of the drainage infrastructure). Page 3 WILLDAN Engineer's Report City of Santa Clarita Drainage Benefit Assessment Area No. 2023-1 (Bouquet Canyon - Tract No. 82126) Detailed maps and descriptions of the location and extent of the improvements to be maintained by the District are on file with the Environmental Services Division and by reference are made part of this Report. These plans and specifications may be amended or modified from time to time to reflect future property development within the District or necessary changes to the planned developments currently approved by the City. The net annual cost to provide and maintain the improvements determined to be of special benefit shall be allocated to each property in proportion to the special benefits received from those various improvements. The District improvements and services are generally described as follows. DRAINAGE MAINTENANCE The proposed services) involve the maintenance and operation of three (3) Continuous Deflection Separation (CDS) commented [KK2]: will have sikand review proposed systems along with four (4) Filterra units, two (2) infiltration basins, two (2) biofiltration basins and one (1) Inlet with services is correct Diversion Weir as identified in the "Preliminary Cost Estimate provided by Sikand Engineering." The project will discharge into storm drainpipes that drain Bouquet Creek, which is lined, and from there discharged to the Santa Clara River. The CDS will treat runoff from portions of the Bouquet Canyon Development where it joins the existing road on the north as well as the easterly side of existing Bouquet Canyon Road and is designed to remove trash, debris and coarse sediment from incoming flows. The Filterra units are designed to capture and immobilizes pollutants. The infiltration basins will have vegetated depression to store runoff and will be located adjacent to Bouquet Creek, adjacent to Bouquet Canyon Road, and northerly of Bouquet Creek on the east side of the project. The biofiltration basins will provide water quality treatment for the Pollutants of Concern and will be located near the intersection of Pam Court and existing Riverglen Drive and at the southeasterly corner of the project where the realignment of Bouquet Canyon Road begins. Page 4 *"WILLDAN Engineer's Report City of Santa Clarita Drainage Benefit Assessment Area No. 2023-1 (Bouquet Canyon - Tract No. 82126) Part II — METHOD OF APPORTIONMENT The 1982 Act permits the establishment of assessment districts by agencies for the purpose of providing for the maintenance, operation and servicing of drainage and flood control improvements as well as streets, roads, and appurtenant facilities. The 1982 Act further requires that the cost of these improvements be levied according to benefit rather than assessed value: "The amount of the assessment imposed on any parcel of property shall be related to the benefit to the parcel which will be derived from the provision of the service." Furthermore: "The annual aggregate amount of the assessment shall not exceed the estimated annual cost of providing the service, except that the legislative body may, by resolution, determine that the estimated cost of work authorized ... is greater than can be conveniently raised from a single annual assessment and order that the estimated cost shall be raised by an assessment levied and collected in installments.... The revenue derived from the assessment shall not be used to pay the cost of any service other than the service for which the assessment was levied. The method of apportionment described in this Report for allocation of special benefit assessments reflects the composition of parcels within the District and the improvements and services provided, to fairly apportion the costs based on the special benefits to each parcel. BENEFIT ANALYSIS The ongoing maintenance and servicing of the District improvements is an integral part of the use and preservation of the properties within the District and as such confer a particular and distinct special benefit to those parcels. The proper maintenance of the improvements and appurtenant facilities allows individual parcels to be developed and used to their fullest extent by ensuring adequate drainage and proper control of excess water during periods of rain, which is essential to preservation and protection of private property. In reviewing the USMP and Environmental Impact Report (EIR) prepared in connection with the development of properties in Bouquet Canyon Tract No. 82126 (which contains all parcels within the District) it was determined that improvements to be maintained are necessary to provide drainage and control of excess water during periods of rain for properties within the District. That analysis indicated that the drainage and flow of excess water during periods of rain from surrounding properties will not be addressed by the proposed District improvements and these improvements are only necessary to mitigate water run-off from the properties in the District. Therefore, it has been determined that these drainage improvements and the maintenance and servicing of such improvements is entirely a special benefit to properties in the District and there is no quantifiable general benefit to properties or the public at large. ASSESSMENT METHODOLOGY All costs associated with the improvements and services shall be fairly distributed among the parcels based upon the special benefit received by each parcel. Additionally, in compliance with the California Constitution Article XIIID Section 4, each parcel's assessment may not exceed the reasonable cost of the proportional special benefit conferred to that parcel. The method of apportionment established for this District and described herein, reflects the proportional special benefit each property receives from the improvements and services based on the actual or proposed land use of that parcel as compared to other properties within the District. The benefit formula used to determine the assessment obligation for each parcel is based upon both the type of improvements that benefit that particular parcel as well as the proposed land use of each property as compared to other parcels that benefit from those specific improvements. *"W I LLDAN Page 5 Engineer's Report City of Santa Clarita Drainage Benefit Assessment Area No. 2023-1 (Bouquet Canyon - Tract No. 82126) Upon review of the improvements and the proposed development of properties within the District it has been determined that all properties receive similar special benefits from each of the improvements and services to be funded by annual assessments and a single zone of benefit is appropriate for the allocation of the assessments and proportional special benefit. Equivalent Benefit Units To assess benefits equitably it is necessary to relate each property's proportional special benefits to the special benefits of other properties within the District. The method of apportionment established for most districts formed under the 1982 Benefit Act utilizes a weighted method of apportionment known as an Equivalent Benefit Unit (EBU) methodology that uses a weighted EBU based on an assessment formula that equates the property's specific development characteristics such as land use and size to that of other properties in the District. Because this District will ultimately be for residential use, the single-family residential unit or lot is assigned one (1.0) EBU and other property types (land uses) are proportionately weighted (weighted EBU) based on a benefit formula that equates each property's specific characteristics and special benefits to that of the single-family residential unit. Based on the planned development of properties in Tract No. 82126, the following land use classifications and proportional EBUs are outlined as follows. Single -Family Residential Property defined as a fully subdivided residential home site with or without a structure. For purposes of establishing the proportional special benefits and EBUs for other land uses in this District, the single- family residential land use is designated as the basic unit of assessment and shall be assigned 1.000 EBU per parcel. Vacant Property —defined as property that has been identified as undeveloped but has reasonable development potential (few or no development restrictions). When considering the special benefits from the improvements it becomes evident that the proportional special benefits associated with vacant property is less than that of developed properties because the full improvement infrastructure associated with the property has likely not been installed, but they do benefit from the overall drainage improvements such as the drainage basin. Therefore, the EBUs applied to these properties shall be based on 0.500 EBU per planned residential unit for the property or 1.00 EBU per acre if the number of planned residential units is unknown. Exempt Property (Parcel) — identifies parcels that for various reasons, it has been determined that the parcel does not and will not receive special benefits from the improvements. This land use classification may include but is not limited to: ➢ Lots or parcels identified as public streets and other roadways (typically not assigned an APN by the County); ➢ Dedicated public easements including open space areas, utility rights -of -way, greenbelts, parkways, or other publicly -owned or utility -owned land that serves the community or general public and are not considered or classified as developed public properties; and ➢ Parcels of land that are privately owned but cannot be developed independently from an adjacent property or is part of a shared interest with other properties, such as common areas, sliver parcels, bifurcated lots or properties with very restrictive development potential or use. Because these properties either provide a public service that is comparable to landscaping or street lighting improvements, or they are dependent on another property or development, these types of parcels have no direct need for such improvements and are considered to receive no special benefits Therefore these parcels shall be exempt from assessment and are assigned 0.0000 EBU. However, these properties shall be reviewed annually by the assessment engineer to confirm the parcel's use and/or development status has not changed. Special Case Property — In many districts where multiple land use classifications are involved or the properties being developed are being constructed in phases, there may be one or more properties that the standard land use classifications do not accurately identify the use and special benefits received from the improvements or there may be something about that particular parcel that should be noted for review in subsequent fiscal years. * WILLDAN Page Engineer's Report City of Santa Clarita Drainage Benefit Assessment Area No. 2023-1 (Bouquet Canyon - Tract No. 82126) The EBUs assigned to Special Case Properties will vary depending on the circumstances and reasons for treating each particular property as a Special Case. The EBU(s) assigned to each such parcel may be based on adjusted acreage, units, planned subdivided lots, or a combination of those factors. The City and/or the assessment engineer tasked with the administration of the District shall annually review each parcel designated as a Special Case Property and based on that review shall make appropriate adjustments to that property's land use and EBU assignment as warranted. Proposed Land Use Tract 82126 Residential 1.00 per Lot/Unit Vacant Property 0.50 per Planned Lot/Unit Vacant Property (Unknown Units) 1.00 per Acre Exempt Parcel 0.00 per Lot/Parcel Assessment Calculations The total number of Equivalent Benefit Units (EBUs) is the sum of all individual EBUs applied to parcels that receive special benefit from the improvements. An assessment amount per EBU (Assessment Rate) for the improvements is established by taking the total cost of the improvements and dividing that amount by the total number of EBUs of all parcels benefiting from the improvements. This rate is then applied back to each parcel's individual EBU to determine the parcel's proportionate benefit and assessment obligation for the improvements. Total Balance to Levy / Total EBU = Levy per EBU Levy per EBU x Parcel EBU = Parcel Levy Amount ASSESSMENT RANGE FORMULA Any new or increased assessment requires certain noticing and meeting requirements by law. Prior to the passage of Proposition 218 (California Constitution Articles XIII C and XIII D), legislative changes in the Brown Act defined a "new or increased assessment" to exclude certain conditions. These conditions included "any assessment that does not exceed an assessment formula or range of assessments previously adopted by the agency or approved by the voters in the area where the assessment is imposed." This definition and conditions were later confirmed through Senate Bill 919 (Proposition 218 implementing legislation). The purpose of establishing an Assessment Range Formula is to provide for reasonable increases and inflationary adjustment to annual assessments without requiring costly noticing and mailing procedures. Commencing with fiscal year 2024-2025, the amount of the maximum assessment will increase to adjust for increases in labor and material costs. This increase will be based upon the annual change in the Consumer Price Index, All Urban Consumers, for the Los Angeles -Long Beach -Anaheim Area, as determined by the United States Department of Labor, or its successor, without conducting another mailed ballot election. * WILLDAN Page Engineer's Report City of Santa Clarita Drainage Benefit Assessment Area No. 2023-1 (Bouquet Canyon - Tract No. 82126) The Maximum Assessment is adjusted annually and is calculated independent of the annual budget and proposed annual assessment. Any proposed annual assessment (rate per EBU less than or equal to this Maximum Assessment) is not considered an increased assessment, even if the proposed assessment is greater than the assessment applied in the prior fiscal year. Although the Maximum Assessment will increase each year, the actual assessment may remain unchanged. The Maximum Assessment adjustment is designed to establish a reasonable limit on assessments. The Maximum Assessment calculated each year does not require or facilitate an increase to the annual assessment and neither does it restrict assessments to the adjusted maximum amount. If the budget and assessment for the fiscal year do not require an increase, or the increase is less than the adjusted Maximum Assessment, then the required budget and assessment may be applied without additional property owner balloting. If the budget and assessments calculated requires an increase greater than the adjusted Maximum Assessment, then the assessment is considered an increased assessment and would be subject to balloting. * W I LLDAN Page 8 Engineer's Report City of Santa Clarita Drainage Benefit Assessment Area No. 2023-1 (Bouquet Canyon - Tract No. 82126) Part III — DISTRICT BUDGETS The Benefit Assessment Act of 1982 (hereinafter "the Act") provides that the estimated costs of the improvements shall include the total cost of the improvements, including incidentals, which may include reserves to operate the District until funds are transferred to the City. The Act also provides that the amount of any surplus, deficit or contribution be included in the estimated cost of improvements. The net amount to be assessed on the lots or parcels within each district is the total cost of maintenance and servicing with adjustments either positive or negative for reserves, surpluses, deficits, and/or contributions. The budget on the following page outlines the estimated annual costs to be collected and deemed necessary for the operation, maintenance, and servicing of the improvements for the District. The maximum assessment (Rate per Equivalent Benefit Unit) identified in the budget establishes the initial maximum assessment for the District in fiscal year 2023/2024. This assessment rate shall be adjusted annually by the Assessment Range Formula described in the method of apportionment and collectively this assessment rate and inflationary adjustment will be presented to the property owners of record for approval as part of the balloting process for new or increased assessments in accordance with the provisions of the California Constitution, Article XIII D. * WILLDAN Page Engineer's Report City of Santa Clarita Drainage Benefit Assessment Area No. 2023-1 (Bouquet Canyon - Tract No. 82126) DBAA No. 2023-1 (Tract 82126) Fund Number TBD Unit QuantityItem Maintenance Cost Continuous Deflection System (CDS) EA 3 Inspection $726.00 1 2,178.00 Cleaning $1,500.00 1 4,500.00 Maintenance and Repairs $550.00 10 1,650.00 Subtotal CDS Cost $8,328.00 Filterra System EA 4 Maintenance and Inspections $175.00 1 $2,800.00 Bioflltration Basin EA 2 Maintenance and Inspections $0.409 1 $6,880.37 Infiltration Basin EA 2 Maintenance and Inspections 10% 1 $16,615.00 Inlet w/ Diversion Weir EA 1 Maintenance and Inspections 10% 1 $5,000.00 General Maintenance Other Maintenance and Inspections $6,938.80 Landscaping SOFT 77,475 Maintenance (General, Waterand Electric) $0.00 Total Maintenance $46,562.17 Administrative Cost City Personnel Cost $2,750.00 Engineer's Report/Annua l Assessment Calculation 2,750.00 $5,500.00 Total Administrative Cost Reserves Operating Reserve(50%) $23,281.08 Annual Capital Renovation Reserve 22,591.60 Total Reserves $45,872.68 Total Operation and Maintenance Cost $97,934.85 Less: Contribution for General Benefit $0.00 Rounding Adjustment $2.49 Total Amount to Assessment $97,937.34 Equivalent Benefit Units 332.25 Maximum Assessment Rate $294,77 * W I LLDAN Page 10 Engineer's Report City of Santa Clarita Drainage Benefit Assessment Area No. 2023-1 (Bouquet Canyon - Tract No. 82126) CDS System — includes the estimated annual cost of inspecting, cleaning, maintaining and repairing the CDS System. Inspections. The CDS System requires regular inspections in order to determine if any of the following conditions exist necessitating cleaning, maintenance or repair: • Built-up silt and soil build-up on the surface and pollutant accumulation; • Blockages or obstructions to inlet and/or separation screen; • System does not drain to the elevation of the lowest pipe in dry conditions; and • Evidence of potholes or sinkholes. Inspections should be performed twice a year at a minimum. More frequent inspections are advised for the first year of operation of the CDS System and where site activities increase the rate at which the system collects pollutants. Cleaning. The CDS System should be cleaned annually at a minimum. More frequent cleaning is necessary whenever the level of sediment has reached 75% of capacity in the isolated sump and/or when an appreciable level of pollutants has occurred. Maintenance and Repairs. The CDS System will require unscheduled maintenance and repairs over time. The estimated cost of maintenance and repairs that may occur over a period of ten years is divided by ten and collected annually for such costs. Filterra System — includes the cost of inspection and cleaning the Filterra. This includes the removal of tree grate, erosion control stone, debris, trash and mulch on an annual basis Biofiltration Basin Cost — includes the cost of inspection and cleaning the Biofiltration Basin. This includes the removal of silt and soil build-up and pollutant removal on an annual basis. Infiltration Cost — includes the cost of inspection and cleaning the Infiltration. This includes the removal of silt and soil build-up and pollutant removal on an annual basis. Inlet w/ Diversion Weir — includes the cost of inspection and cleaning the Diversion Weir. This includes the removal of sediment and debris on an annual basis. Administrative Cost — includes the Administrative Costs related to the preparation of the Engineer's Report and placing the annual assessments on the county property tax bills for collection. This includes City Special Districts' personnel costs and consultant costs. Reserves — includes Operating Reserves which are utilized to operate the District until funds are transferred to the City from the County around December loth. Also includes Capital Replacement Reserves which are determined as shown in the table that follows. try WILLDAN Page11 Engineer's Report City of Santa Clarita Drainage Benefit Assessment Area No. 2023-1 (Bouquet Canyon - Tract No. 82126) Capital Replacement Reserve ItLm Quantity Replacement Cost CDS Units 3 $40,000.00 75 $1,600.00 Filterra System 4 $20,000.00 75 1,066.67 Biofiltraton Basin 2 $141,750.00 75 1,890.00 Infiltration Basins 2 $171,800.00 75 2,290.67 Inletw/ Diversion Weir 1 $50,000.00 75 666.67 Manhole 2 $7,500.00 50 300.00 DiverterManhole 3 $15,000.00 50 900.00 General Other N/A $693,880.00 50 13,877.60 Total Annual Replacement Cost $22,591.60 VY W I LLDAN Page 12 Engineer's Report City of Santa Clarita Drainage Benefit Assessment Area No. 2023-1 (Bouquet Canyon - Tract No. 82126) Part IV — DISTRICT DIAGRAM The following District Diagram identifies the area of land within the District to be designated as "Drainage Benefit Assessment Area No. 2023-1 (Tract No. 82126)", based on the development and improvement plans for the District, Los Angeles County Assessor's Maps, and Los Angeles County Assessor's property information as the same existed at the time this Report was prepared. The District includes Los Angeles County Assessor's Parcel Map Book 2812: Page 008 Parcels 2, 3, 8 through 13, 21, 22, 25, 31, 900, and 901 Page 022 Parcel 31 and Page 038 Parcel 2. The combination of this map and the Assessment Roll contained in Part V of this Report constitute the Assessment Diagram for the District. The maximum assessment rate, assessment range formula and the proposed assessment amount for each of the lots and parcels of land within the District, as described herein, shall be presented to the property owners of record for approval or protest in accordance with the provisions of the California Constitution. Detailed District Drainage Diagrams are on file with the City and available upon request. VN W I LLDAN Page 13 Engineer's Report City of Santa Clarita Drainage Benefit Assessment Area No. 2023-1 (Bouquet Canyon - Tract No. 82126) CITY OF SANTA CLARITA Drainage Benefit Assessment Area No. 2023-1 (Bouquet Canyon Tract No. 82126) VY WILLDAN Page 14 Engineer's Report City of Santa Clarita Drainage Benefit Assessment Area No. 2023-1 (Bouquet Canyon - Tract No. 82126) Part V -ASSESSMENT ROLL Parcel identification for each lot or parcel within the District is outlined in the preceding Assessment Diagram and is based on available parcel maps and property data from the Los Angeles County Assessor's Office at the time this Engineer's Report was prepared. A listing of the lots and parcels to be assessed within this District as of fiscal year 2023/204, along with the assessment amount for each such lot or parcel is provided below. If any parcel submitted for collection is identified by the County Auditor -Controller to be an invalid parcel number for the fiscal year, a corrected parcel number and/or new parcel numbers will be identified and resubmitted to the County Auditor -Controller. The assessment amount to be levied and collected for the resubmitted parcel or parcels shall be based on the method of apportionment and assessment rates described in this Report as approved by the City Council. Therefore, if a single parcel is subdivided to multiple parcels, the assessment amount applied to each of the new parcels shall be recalculated and applied according to the approved method of apportionment and assessment rate rather than a proportionate share of the original assessment amount. The following is a list of the lots and parcels of land (parcels) within the District and the corresponding maximum assessments being set for Fiscal Year 2023/2024 as determined by the assessment rate and method of apportionment described herein: 2812-008-002 LENNAR HOMES OF CALI FORNIA LLC 2.742 8.96 $294.77 $2,641. 2812-008-003 LENNAR HOMES OF CALIFORNIA INC 11.451 37.42 $294.77 $11,030. 2812-008-008 LENNAR HOMES OF CALI FORNIA INC 1.222 1.00 $294.77 $294. 2812-008-009 YOUTSLER ERNESTINE 3.678 1.00 $294.77 $294. 2812-008-010 MA PHUONG PHUONG MA TRUST 1.328 1.00 $294.77 $294. 2812-008-011 YOUTSLER ERN ESTIN E YOUTSLER TRUST 0.719 1.00 $294.77 $294. 2812-008-012 ROWE CHRISTOPHER L 1.259 1.00 $294.77 $294. 2812-008-013 LENNAR HOMES OF CALIFORNIA INC 1.029 3.36 $294.77 $990. 2812-008-021 VASQUEZ RUTH Z 1.038 0.00 $294.77 $0. 2812-008-022 LENNAR HOMES OF CALI FORN IA INC 31.914 104.28 $294.77 $30,738. 2812-008-025 DD LAND HOLDINGS LLC 0.031 0.00 $294.77 $0. 2812-008-031 LENNAR HOMES OF CALIFORNIA INC 9.77 31.93 $294.77 $9,412. 2812-008-900 LACOUNTY 30.552 0.00 $294.77 $0. 2812-008-901 LACOUNTY 0.250 0.00 $294.77 $0. 2812-022-031 LENNAR HOMES OF CALIFORNIA INC 0.487 0.00 $294.77 $0. 2812-038-002 LENNAR HOME OF CALIFORNIA INC 43.241 141.30 $294.77 $41,651. VY WILLDAN Page 15