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HomeMy WebLinkAboutStaff Report 1.B 11/13/2017Stormwater Management Presented to- City of Petaluma City Council Presented by,- Dan St. John, F.ASCE, Director, Public Works and Utilities Contributors: Chelsea Thompson, Environmental Services Analyst Kent Carothers, P.E., Operations Manager Jason Beatty, P.E., Senior Engineer We t V Stormwater Management 1 Benefits Include,. If Flood d Prevention Enhancement of Water Quality and Estuarine Environment Protection e o .. Sanitary i,a Sewer te: e. ,.: Facilities i._ Inflow Increased Recycled Water Supply Thru ,: Captu re Reduce Trash in Waterway • \� \\.\ )v\\-\�\�� 2\\ S tormwater P rograr Operations & Maintenance Channels and Pipes Flood Ways Floodplain Management Capital Projects MS4`Pm er' ' it Compliance Trash Ca,pture (NEW) * US EPA © Separate Storm Sewer System NPDES (National Pollution Discharge Elimination System) Phase 2 Program h, p, Stormwater Funding Current Y ,e Loan from Storm Drain Impact Fee Fund to Storm Water Enterprise Fund, July 2012 Annual Payment O&M Costs to Protect Sanitary Sewers Collected with Sewer R?--tes General Fund-, $498,000 in FY 17/18 Current Funding Not Adequate to Meet Program Needs, including: o Compliance Steps such as Trash Capture Mandate "� Capital Replacement Program 0 Area of UG13 16.1 Square Mile (SM) Area Petaluma River 146 SM watershed 7 Miles within City Limits 43 Miles of Storm Drain Pipe, 8" - 80" Diameter 3475 Stormwater Inlets 20 Miles of Open Channels 1.7 miles of Roadside Ditches 70 Bridge or Culvert Road Crossings 4 Stormwater Pump Stations Wilson St., Vallejo St., Payran, & PIPS Oxidation Ponds at ECWRF for 1/1".0% ��er Gage Network UGB' Urban Growth Boundary I/I: Inflow and Infiltration 6 Storm Inlet Debris Removal Street Sweeping �` Channel Vegetation and Debris Removal � Pump Stations Operati+ River Gauge Network River Dredging Performed at least in part ether �r�title� Res p on s ibil it ie s ., � . - �� k e WW Y � ..aw..,mw^. n•r�"'x^^^`"k'k rn "�,. a„ ... v,; '".,e„m rF�'wm.w � w .;'"" � r r ^ Flood Project Area p, Dere O&M Is Not Budgeted le . . m S OWNERSHIP . - CREEKS cR� irdutra mtTc�a �oaiw� r MINT-SY .. *•,�,,• ARW4 CORP MY PRIVATE SCY,'A - STATE u'NKNC.°.74 cmr PAFRCELS INCOUXTY °,. NOMA-MARaN R XLTRANSIT' S.CAVA, 41AINIEDPROPSRry STATE OWNED PFROPM v _ CCaUNru G'hREI} PR-CSPEAiY Channel Maintenance Res p on s ibil it ie s Flood Insurance Rate Map Major Re -mapping Events Letters of Map Revisions Maintain City's XPSWMM Storm Water Model :OrdinanceFlood Readiness Enforce City's Floodplain Flood Hazard Awareness Current Funding Permit Fees Cost Recovery General Fund Property Acquisition, Channel Terrace/ Detention Basin, & Sediment Removal Kelly Creek at Sunnyslope Avenue Reconstruct Confluence and Extend (Feasibility Study) Storm Drain: Adobe Creek (eastern—most undercrossing Construct Sediment and Debris Basin of Casa Grande Road) 111 Proposed Zone 2A Projects Willow Brook Flood Detention Basin oust Property Acquisition and flood outside city limits on Old Redwood detention basin Highway) Corona Reach (west of H101 south of New Linear Overflow Channel Corona Rd) Lichau Creek (Site TBD with analysis) Property Acquisition and flood detention basin TOTAL ESTIMATED COSTS TOTAL (estimated) S2,650,000 $180,000 $62=0 $608,000 $3,500,000 $3,000,000 $1,500,000 $4,000,000 $8,500,000 Citv Funded Capital Replacement Program of Storm Pipes and Inlets a Need Update to Stormwater Master Plan a CIP Budget Expected to Exceed $400,000/Year a Stormwater Program Elements. Mas 4 Phase 11 Perm"It 1111 MAO ,�, �_ i(g rou n* Statewide permit issued by the State Water Board in 2003 for Phase 11 Smaller Municipalities with population less than 100,000 Phase 11 Renewal effective July 1 2013 contained new and expensive Mandates Basic Permit Requirements Prohibit non -storm water discharges to City Storm Sewers Illicit Discharge Detection & Elimination Require Best Management Practices (BMPs) a Construction Site Storm Water Runoff Controls for sites < I acre Post Construction Storm Water Management in New & Redevelopment Projects Pollution Prevention & Good Housekeeping for Municipal Operations Public Involvement & Participation 12 Stormwater Elements, eMandates Water Quality Monitoring including Total ` Loads `.field assessments Program Effectiveness Assessment Specific plass & procedures) , Tracking nd reporting of BMPs Stormwater treatment & control for new development projects Trash t r Biggest Cost Driver Implementation Plan Due in about One Year 13 tr � , t 13 Trash Capture Mandate Develop Implementation Plan by December 20181 Determine Full Trash Capture (FTC) devise locations Preliminary Map developed in partnership with other regional agencies Develop outreach and clean-up program that is equivalent to FTC devises at all possible locations, to include: Outreach, street sweeping, cleanup days, public education, public trash receptacles Install a few FTC devices, determine capital & operating costs, & rate capture effectiveness. Information used to finalize Plan I O - Year Window to implement plan including FTC devise installation and Control Measures Possible Alternatives, low to high cost: Demonstrate that Control Measures are equivalent to installing full capture devices - higher risk and uncertainty Install Large Capture Devices and demonstrate that plan of control measures is equivalents to installing Proposed all Capture Devices Install all recommended Capture Devices, large and small, for full capture Stormwater Program Cost of Service Analysis = M Storm Sewer Maintenance (1) Wages and Benefits Services and Supplies Wetland Regulatory Compliance Existing Annual Projected Total Projected Dedicated Budget Additional Costs Annual Costs Funding (6, 7) I subtotal- $ MS4 Compliance (2) Wages and Benefits - MS4 $ Wages and Benefits - Trash Capture Trash Capture - FCS Devises (4) O&M of FCS Trash Capture Devises Trash Capture - Additional Street Sweeping (8) R70-rm-water Loan (31 - MEM, 0 266,916 $ 25,000 $ 291,916 $ 141,916 $ 275,249 142,832 $ 40,000 $ 182,832 $ 41,250 156,165 _$ 48.200 $ 48,200 5 - 16,067 409,748 $ 113,200 $ 522,948 $ 183,166 $ 447,481 127,385 $ 191,486 $ 318,871 $ 159,299 $ 114,206 $ 114,206 $ 19,034 $ 15,600 $ 15,600 $ 15,600 $ 150,000 $ 150,000 $ 25,000 .5 150,000 150,000 S 25,000 127,385 $ 621,292 748,677 $ $ 243,934 142,000 142,000 142,000 lAdministration and Overhead $ 28,782 3,454 $ 32,236 $ 29,358] [Capital Replacement Projects (5) $ $ 400,000 400,000 $ 66,6671 LOTAL ANNUAL COSTS $ 707,915 $ 1,137,946 $ 1,845,861 183,1616 $ 929,439 J Notes: 1: Additional costs to ramp up over 3 years except for FCS. 5: Storm pipe and inlet replacements, 6 -year ramp -up, 2: Additional costs to ramp up over 6 years. 6: Not including General Fund. Payback on SW lawsuit thru FY '23, approximately. 7: Benefits Wastewater Fund & Included in current sewer rates. Purchase & installation of new FCS devises. & Contingency if increased frequency of sweeping is needed. 09 Funding Needed Funds Needed Budget Year (1) Current Budget Year - General Fund Contribution $ 52,4,749 FY 2018/19 Funding Needs $ 746,273 Note: I : Funding needed over and above fees currently collected, not including previous commitment of General Fund reserves. a lFunii"ng Opt'iaons Property Tax Sales Tax Property Assessments �_> Water/Wastewater Fee Solid Waste (Garbage) Bonds/Loans Grants Development Fees Stormwater Impact Fees Stormwater User Fees .,d Projects Yes thru Cost Recovery M Most Common Method of Funding Stormwater Operations Property Service Related Fee Stormwater Fee Similar to Sewer or Water Service Subject to Prop 218 Not Considered a Tax or Annual Property Assessment Customer Benefit Linked to Volume of Runoff Associated with Private Property Benefits Property by providing Flood Protection, Improved Water Quality, Reduced Wastewater Costs, Improved Water Supply and Groundwater Protection, and Better Trash Service Impervious Area used to approximate Runoff Volume for Cost Allocation Stormwater Rates vary widely by jurisdiction Biannual surveys available tu Western Kentucky University and Black & Veatch. 0 Typical Stormwater Ratel'.1111,1 Palo lto (1) Sacramento (2) Burlingame (2) p 7- Y, F" A. San Bruno (2) Albany (2) Contra Costa County (1) Vallejo (2) Santa Rosa (2) Santa Clarita (I A ,6 $12.63 $ 4.20 $ 3.47 $ 2.92 $ 1.97 $ 1.96 $ 1.92 Rate Su revs 1: 2016 Stormwater Utility Survey, Black& Veatch 2: Stormwater Utility Survey 2016, Western Kentucky University 19 SB 231 -Does this Change Things? Prop 218 Basics Adopted in 1996 - Citizen Right to Vote for New Fees All Fees Require Notice, Protest Vote and Hearing Require Affirmative Vote Except of Water, Sewer, and Trash . 2/3 of electorate, or 50% +1 of Property Owners 2002 Salinas Case k Not rely on Public Utility Code Definon of "Sewer C Disallowed stormwater sewer maintenance costs under "Sewer" exemption to affirmative vote provision Other cases OK'd groundwater recharge costs as art of (i water" supply and household hazardous waste as part or"refuse ] S13 231 Sought to Clarify Legislative Intent Defines Storm Sewer Costs as part of "Sewer" and therefore exempt from Affirmative Vote Requirements M Things are Not As It Appears in Writing Use of SB 231 to Create "pure" stormwater fee threaten to be challenged in Court Conservative Legal AdviceShould Covej Enhance Water Supply, i.e. for water Diversion, Capture, Treatment and Recharge Protection of Sanitary Sewer System Refuse collection Show benefit to Water, Sewer, Go small & carefully, and buill test cases further clarity law Flood Control Dr Refuse. up after additional a Refine Cost of Service Analysis to Include Trash Capture Mandate . Include Costs in Garbage Bill to Fund Trash Capture FCS Program Implement Rates to Fund Storm Sewer Activities by: Verifying that Existing Refuse, Water, and Sewer Rates include stormwater costs directly benefiting these areas of services Developing Rate Rationale for a Stormwater Fee that benefits Water Supply, Refuse Collection, and/or Sanitary Sewer Operations Implement a Robust Public Information Campaign to Addressing Costs and Benefits of Storm Sewer Operations Work with SCWA Zone 2A to Assure that Tax Revenues From Properties within the City are Used for Maintenance of Existing City-wide Flood Control Facilities M erEnvironmen-1, Water Quality and Water Supply Flood Control and Mitigation Wildlife, Fisheries and Ecosystem Protection Reduced Wastewater Costs Increase Recycled Water Supply Enhanced Trash and Refuse Manaaement r 7;; 0 r�C I n Al n, w "11,7411,41 _ r `�I IIII YF 7 z