Pima County Regional Optimization Master Plan

Transcription

1 Pima County Regional Optimization Master Plan Proposed extent of screen enclosure Existing and Expanded Ina Road WPCF Approximately 160 acres Sports Park Michael Gritzuk, P.E., Director Edward Curley, Planning Manager Pima County Regional Wastewater Reclamation Department Central Lab Building Preliminary Treatment Aeration Basins Clarifiers Disinfection Water Reclamation Campus Approximately 41 acres NORTH Administration Building Pima Association of Governments Environmental Planning Advisory Committee February 1, 2008 Santa Cruz River Existing Roger Road WWTP Approximately 48 acres 1

2 PCRWRD Treatment Facilities Roger Road WWTP Ina Road WPCF Green Valley WWTF Pima County Fairgrounds WWTF Avra Valley WWTF Corona de Tucson WWTF Arivaca Junction WWTF Marana WWTF Mt. Lemmon WWTF Rillito Vista WWTF Randolph Park WRF 2

3 Ina Road WPCF Sewer Basin = 198 square miles The Metropolitan Sewerage System Ina Road WPCF Roger Road WWTP Roger Road WWTP Sewer Basin = 275 square miles 3

4 Regional Optimization Master Plan Goals Current and future regulatory compliance Meet capacity needs to 2030 Upgrade / rehabilitate aging infrastructure State-of-the-art technology Staff-friendly Automation Community acceptance N 2 O 2 N 2 O Fermentation First Nitrification Anoxic Recycle Sludge 5-stage Bardenpho process (Source: EIMCO Water Technologies) Second Anoxic Re-aeration Clarifier Waste Sludge 4

5 Regional Optimization Master Plan Scope of Work Develop the optimal treatment process and plan to comply with regulatory requirements to reduce total t nitrogen concentrations in discharged effluent Master plan foreseeable future regulatory requirements Determine the long-term capacity needs of the County metropolitan facilities, conveyance system and outlying growth areas Ina Road WPCF Headworks 5

6 Regional Optimization Master Plan Scope of Services Develop long-term plan for the treatment, t t handling and reuse of system bio-solids and bio-gas Develop a detailed implementation schedule to meet regulatory implementation deadlines and the optimization master plan Develop a financial plan to support the system s regulatory and other needs for the next fifteen years 6

7 Regulatory Implementation Requirements to Reduce Total Nitrogen Concentrations Complete initial engineering study Recommendation for upgrading treatment plants Submit recommended plan letter to ADEQ Award contract for construction ti Treatment of effluent to non-toxic nitrogen levels Ina Road WPCF Roger Road WWTP February 1, 2007 January 30, 2007 December 31, 2010 January 30, 2011 January 30, 2014 January 30,

8 ROMP Plan Expand Ina Road WPCF to 50 mgd Construct new 32 mgd Water Reclamation Campus (in vicinity of existing Roger Road WWTP) Plant Interconnect 28 mgd average, 72 mgd peak flow Decommission existing 41 mgd Roger Road WWTP Ina Road WPCF Roger Road WWTP 8

9 ROMP Cost Estimate (2006 dollars) Ina Road WPCF Upgrade/Expansion $243,900,000 Electrical Upgrades $35,000,000 Plant Interconnect $22,300,000 Water Reclamation Campus $211,000,000 Roger Road WWTP Demolition $23,800, Total Estimated Cost $536,000,000 * * Cost estimate includes design costs, UV disinfection and 5% contingency. 9

10 Ina Road WPCF Expand treatment capacity to 50 mgd Convert existing process to Bardenpho process Additional 12.5 mgd expansion Most cost-effective utilization of existing headworks capacity of 50 mgd Centralized biosolids processing and handling Reduces overall cost Provides for co-generation bio-gas utilization at one location Provides one point of distribution of final product 10

11 50 MGD Ina Road RWRF Overall Plant Aerial View with Screen Enclosure Existing and Expanded Ina Road RWRF Approximately 160 acres EXISTING PROPOSED: Bardenpho Treatment Units Primary Clarifier Secondary Clarifiers Digesters Thickener Tanks Enhanced Chlorination Proposed extent of screen enclosure Sports Park 11

12 32 MGD Water Reclamation Campus Overall Aerial View Preliminary Treatment Aeration Basins Clarifiers Disinfection Water Reclamation Campus Approximately 41 acres NORTH Central Lab Building Administration Building Existing Roger Road WWTP Approximately 48 acres 12

13 Implementation Schedule INA Road WPCF 50 mgd (Mesophilic Digestion) Thermophilic Digestion? Power Plant (Ina Road WPCF) Water t Reclamation R l Campus 32 mgd Central Laboratory (Water Reclamation Campus) Demolish existing plant? Design / Approval Construction Acceptance / Startup Testing 13

14 ROMP Implementation Costs Current Estimated t Cost (2006 dollars): $536 million Cost Inflation (assuming an inflation rate of 5% over 15 years): $719 million Bonding / Debt Service $1+ billion Note: Largest Capital Improvement Program in Pima County to date 14

15 Fiscal Year 2008 Financial Plan 15

16 Recommendations User Fee increase in January 2008 (approved) User Fee increase in July 2008 (approved) Connection Fee increase in January 2008 (approved) Connection Fee increase in July 2008 (approved) Lift cap on Service Fee and request increases in Service Fee in January and July 2008 (approved) 2008/09 bond election - $565 million Additional bond programs in 2012, 2016 and

17 Estimated Monthly Bill Current January 08 July 08 17

18 Growth in Debt Service 18

19 Summary of Findings Revenue requirements Projected to increase by 8% per year over 10-year forecast Except for larger increases in: FY % FY % FY % 19

20 Community Enhancements 20

21 Possible Community Enhancements Park enhancements Regional / International Sports Complex Economic development Environmental enhancement Water Reclamation Campus Study underway Soccer Fields Baseball Diamonds Existing WWTP Softball Diamonds Commercial Development Wetlands 21

22 Kino Environmental Restoration Project 22

23 Avra Valley WWTF 23

24 Q Questions ti and d Comments C t 24