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HomeMy WebLinkAbout2014-07-08 Item 19 Presentation WASTEWATER MASTER PLAN Wastewater Management System and Capacity Fee Summary and Recommendations WASTEWATER MANAGEMENT SYSTEM UPDATE July 2014 WMS Update Purpose Ensure adequate capacity to accommodate planned growth Provide framework for proactive, cost-effective management of wastewater assets Infrastructure needs identified and prioritized in advance Funding in place Timely implementation of upgrades, replacements, and new installations Continue to avoid SSOs, spills Updated Land Use Duty Factors Growth projections reflect adopted land use planning 2005 GP, Amendments Generation rates Based on last 3 years water billing records Assume increased conservation (265 gpd/EDU vs. 230 gpd/EDU) Overview of Sewer System ` ^ CV-12 Rolling Hills Ranch San Miguel Ranch ` ^ CV-10 ` ^ CV-11 Eastlake ` ^ Woods ` ` ^ ^ ` ^ CV-8 CV-9 CV-5 CV-6&7 Colony Urban Core Eastlake Summit ` Eastlake Lake ^ Pointe Urbana CV-3 Eastlake Olympic Pointe Freeway Otay Ranch Village Commercial 6-Marquis I and II Bayfront ` ^ Village 11 CV-2 Eastern Urban Center Village 2_Poggi University Village 2_SCI Village 9 Palomar Village 10 Gateway Village 8 East Village 3 4 North Village 4 ` ^ Village 8 West CV-14 ` ^ ` ^ CV-1 CV-4 Planning Area 20 0±®©¤¢³¤£ 7 ²³¤¶ ³¤± &«®¶² ȃ %·¢¤¤£ -%42/ # ¯ ¢¨³¸ ¡¸ ͷ͵ͷ͹ 35.00 2050 Projected Flows based on 30.00 SANDAG Pop. Projections 2050 Total Flow (29.89 MGD) - 2024 METRO Current METRO 25.00 Capacity (20.864 MGD) 20.00 2050 Projected Flows based on New Building Permits 15.00 @750/year (22.49 MGD) - 2042 METRO 10.00 2010201520202025203020352040204520502055 9¤ ± Total Projected Flow (MGD)Current METRO Capacity (MGD)New Building Permits (@750/year) Treatment Options Purchase Capacity at Point Loma WWTP or build Wastewater Treatment Plant No decision at this time/City will continue to monitor Regional factors may influence decision (potable re-use) WMS Capital Improvement Program Driven by infrastructure evaluation Identifies capital projects Repair/replacement of existing infrastructure Infrastructure improvements (new facilities, major upgrades) Presents capital projects schedule Estimates budget needs Reflects Asset Management approach: Strategic Spending (the right project at the right time) WMS Capital Improvement Program Capital Improvement Projects Pipelines Manholes Meter Vaults convey ultimate flows Approximately $15.8 Million in collection system improvements have been identified WMS Capital Projects Overview WMS Capital Projects West WMS Capital Projects Central WMS Capital Projects East Fee Calculation Methods OPTION 1: Buy-in to existing facilities: New customers pay an amount equal to the investment made by existing customers Basis for current capacity fee Results in a fee of $4,092/EDU Existing collection system + Value of available Metro treatment rights Total build-out capacity Available Metro treatment rights (29.89 mgd) (5.134 mgd) Fee Calculation Methods OPTION 2: Incremental capacity expansion costs: New customers pay marginal cost of new facilities needed to serve them No charge for existing system Produces lowest fee of $3,450/EDU Collection system expansion + Expansion of treatment Remaining EDUs to build-out Remaining EDUs to build-out (14.16 mgd) less available treatment capacity at Metro (9.026 mgd) Capacity Fee Survey Recommendations Adopt new capacity fee of $3,450 based on the incremental method The incremental method produces a lower fee and is based on the best available estimates of the cost of future facilities If future costs are higher than estimated, the capacity fee may need to be increased Capacity fee should be adjusted annually based on the ENR Construction Cost Index Same process as DIFs Recommended Action Adopt resolution accepting the 2014 Wastewater Master Plan Update Place Ordinance on first reading to modify the Sewer Capacity Charge and the Wastewater Unit Generation Rates Questions