F2 — original pdf

Backup

WINTER STORM EVENT BRIEFING Water and Wastewater Commission | April 7, 2021 Agenda Director’s Opening Remarks Winter Storm System Overview & Demand Analysis Financial Relief Achieved to Date Austin Water’s Resiliency Efforts System Overview & Demand Analysis RICK CORONADO Assistant Director, Operations System Overview System Map Event Overview Critical 48-hour period Begin Freeze (Approximate) End Freeze (Approximate) 350 300 250 200 150 ) D G M ( 100 50 0 y a D r e p s n o l l a G n o i l l i M / ) G M ( s n o l l a G f o s n o i l l i M 2/10/2021 2/12/2021 2/14/2021 2/16/2021 2/18/2021 2/20/2021 2/22/2021 2/24/2021 2/26/2021 2/28/2021 Storage Pumpage Usage Initial Storm Response Lakewood Transmission Break 2/10 @ 1PM Begin Freeze (Approximate) AW Incident Command on standby 2/10 @5pm Sanitary Sewer Overflow at Texas Plume Lift Station 2/12 @ 6PM 350 300 250 200 150 ) D G M ( 100 50 0 y a D r e p s n o l l a G n o i l l i M / ) G M ( s n o l l a G f o s n o i l l i M 2/10/21 12:00 AM 2/11/21 12:00 AM 2/12/21 12:00 AM 2/13/21 12:00 AM 2/14/21 12:00 AM 2/15/21 12:00 AM 2/16/21 12:00 AM Storage Pumpage Usage Storage Loss AW Incident Command activated 2/17 @7am SWB Outage 2/16 @10 PM System Peak Hourly 330 MGD 2/17 @ 9 AM SWB Boil Water Notice Issued 2/17 @ 11AM Citywide Boil Water Notice 2/17 @ 8:30 PM End Freeze (Approximate) Ullrich Power Outage 2/17 @ 2PM Ullrich at pre-shut down flowrate 2/18 @ 1AM Ullrich Startup 2/17 @ 5:30 PM 2/15/21 12:00 AM 2/17/21 12:00 AM 2/19/21 12:00 AM 2/21/21 12:00 AM 2/23/21 12:00 AM Storage Pumpage Usage 350 300 250 200 150 ) D G M ( 100 50 0 y a D r e p s n o l l a G n o i l l i M / ) G M ( s n o l l a G f o s n o i l l i M System Recovery Central Zone Boil Water Notice lifted 2/22 AM @ 5:30AM North, South, NWA zones Boil Water Notice lifted 2/22 @ 4:30PM Emergency Water Use Restrictions lifted 2/24 @ 8AM 350 300 250 200 150 ) D G M ( 100 50 0 y a D r e p s n o l l a G n o i l l i M / ) G M ( s n o l l a G f o s n o i l l i M Citywide Boil Water Notice lifted 2/23 @ 11:45AM 2/22/21 12:00 AM 2/23/21 12:00 AM 2/24/21 12:00 AM 2/25/21 12:00 AM 2/26/21 12:00 AM 2/27/21 12:00 AM 2/28/21 12:00 AM Storage Pumpage Usage Leak/Break Timeline Begin Freeze End Freeze D C F E H I 350 300 250 200 150 100 50 n o i l l i M / ) G M ( s n o l l a G f o s n o i l l i M ) D G M ( y a D r e p s n o l l a G A 3 B 0 0 2/10/21 2/11/21 2/12/21 2/13/21 2/14/21 2/15/21 2/16/21 2/17/21 2/18/21 2/19/21 2/20/21 2/21/21 2/22/21 2/23/21 2/24/21 2/25/21 2/26/21 2/27/21 2/28/21 0 1 2 1 2 2 1 7 3 G 17 30 23 26 12 7 5 6 # Leaks # Main Breaks Storage (MG) Pumpage (MGD) Usage (MGD) A - Lake Creek 42" Break B - Texas Plume SSO C - SWB Low Pressure D - Peak Hrly Usage E - SWB BWN F - Ullrich Power Outage G - Minimum Storage H - Citywide BWN I - Ullrich @ Pre-shutdown Flowrate J - Central Zone BWN Lifted K - North, South, NWA BWN Lifted L - Citywide BWN Lifted M - Emergency Water Use Lifted J K L M 350 300 250 200 150 100 50 s k a e r B f o r e b m u N / s k a e L f o r e b m u N Storm Impacts to Facilities Water Treatment Plant Accessibility  Icy conditions prevented travel by staff. 4x4 vehicles with chains were required.  Sludge trucks unable to access the plant and sludge truck hatches were frozen shut during sub-freezing temperatures.  AW equipment and Street & Bridge support cleared the road, allowing sludge truck and chemical truck access by Friday, 2/19. Ullrich Water Treatment Plant Ferric sulfate lines broke and leaked  Ferric sulfate lines associated with Upflow Clarifier 2 broke and caused leaks. Three leaks prevented bringing up Upflow Clarifier 2 and caused plant to maintain at 90 MGD on 2/19.  Lines were professionally insulated but were not able to withstand the temperatures.  The leak spread as snow melted and was successfully contained in sand on 2/20 and disposed by 2/22. Icicle on UFC 1 (out of service) Handcox WTP Broken water lines, pressure issues and filter backwash pump station frozen    Pressure Reducing Valve broke on centrifuge water lines, which required sending sludge to sewer as early as 2/13. Potable water pumps, lines and instrumentation at filter backwash pump station froze. Filters continued to perform well despite high run times. Manual backwash was working by 2/20. Low pressure from Northwest C Pressure Zone to feed lime slakers; Used a potable water pump and hydrostatic tank to manually run slakers.​ Collection Lift Stations Power Outage Impacts  Texas Plume Lift Station: Sanitary Sewer Overflow  Scotland Wells Lift Station: Dry Pit Partially Flooded  Cliffs over Lake Austin Lift Station: Storm Impacts  Westpark Lift Station 3: Dry Pit Flooded – SSO avoided South Austin Regional Wastewater Treatment Plant  Broken Non Potable Water lines • Repairs prioritized to critical equipment first • Long-term solutions to include addition of heat strips, insulation, isolation valves to noncritical water lines  Statewide hypochlorite shortage • Emergency purchases made through • Purchase additional hypochlorite other vendors storage tank Preliminary Demand Analysis Preliminary Demand Overview ) G M ( s n o l l a G f o s n o i l l i M 300 250 200 150 100 50 0 Customer Demand (Base) Customer faucet dripping and bursts Utility-side leaks and losses Water going into storage tanks Water going into pipe network Typical daily customer use in February Customer Data From My ATX Water Customer Portal (AMI) Continuous Usage & Burst Leaks Identified in Portal s r e m o t s u C I M A f o r e b m u N 1400 1200 1000 800 600 400 200 0 2/28/2 021 Continuous Usage 98 Burst Leak 6 Daily Cumulative Leaks 2% 4% 10% 20% 28% 30% 18% 12% 7% 4% 5% 4% 4% 4% 3% 3% 3% 2/19/2 021 395 53 2/14/2 021 359 16 2/16/2 021 981 94 2/15/2 021 708 44 2/17/2 021 1016 127 2/18/2 021 621 53 2/20/2 021 214 45 2/21/2 021 132 30 2/22/2 021 151 44 2/23/2 021 141 26 2/24/2 021 132 24 2/25/2 021 118 16 2/26/2 021 115 14 2/27/2 021 116 12 2/13/2 021 146 8 2/12/2 021 53 6 35% 30% 25% 20% 15% 10% 5% 0% Example Customer Profiles  The following slides show examples of two customers who had leaks identified during the freeze event. Running a hose to prevent a freeze, transitioning into a burst leak.  Customer 1  Customer 2 Burst leak from a frozen irrigation line. Normal Use Example Water Use by Hour s n o l l a G 40 35 30 25 20 15 10 5 0 Customer #1 Continuous Usage Alert into a Burst Leak Water Use by Hour Burst leak occurred Customer received portal notification of continuous use Customer notified AW of a running hose due to freeze s n o l l a G 500 450 400 350 300 250 200 150 100 50 0 0 0 : 0 1 2 0 2 / 2 1 / 2 0 0 : 4 1 2 0 2 / 2 1 / 2 0 0 : 8 1 2 0 2 / 2 1 / 2 0 0 : 2 1 1 2 0 2 / 2 1 / 2 0 0 : 6 1 1 2 0 2 / 2 1 / 2 0 0 : 0 2 1 2 0 2 / 2 1 / 2 0 0 : 0 1 2 0 2 / 3 1 / 2 0 0 : 4 1 2 0 2 / 3 1 / 2 0 0 : 8 1 2 0 2 / 3 1 / 2 0 0 : 2 1 1 2 0 2 / 3 1 / 2 0 0 : 6 1 1 2 0 2 / 3 1 / 2 0 0 : 0 2 1 2 0 2 / 3 1 / 2 0 0 : 0 1 2 0 2 / 4 1 / 2 0 0 : 4 1 2 0 2 / 4 1 / 2 0 0 : 8 1 2 0 2 / 4 1 / 2 0 0 : 2 1 1 2 0 2 / 4 1 / 2 0 0 : 6 1 1 2 0 2 / 4 1 / 2 0 0 : 0 2 1 2 0 2 / 4 1 / 2 0 0 : 0 1 2 0 2 / 5 1 / 2 0 0 : 4 1 2 0 2 / 5 1 / 2 0 0 : 8 1 2 0 2 / 5 1 / 2 0 0 : 2 1 1 2 0 2 / 5 1 / 2 0 0 : 6 1 1 2 0 2 / 5 1 / 2 0 0 : 0 2 1 2 0 2 / 5 1 / 2 0 0 : 0 1 2 0 2 / 6 1 / 2 0 0 : 4 1 2 0 2 / 6 1 / 2 0 0 : 8 1 2 0 2 / 6 1 / 2 0 0 : 2 1 1 2 0 2 / 6 1 / 2 0 0 : 6 1 1 2 0 2 / 6 1 / 2 0 0 : 0 2 1 2 0 2 / 6 1 / 2 0 0 : 0 1 2 0 2 / 7 1 / 2 0 0 : 4 1 2 0 2 / 7 1 / 2 0 0 : 8 1 2 0 2 / 7 1 / 2 0 0 : 2 1 1 2 0 2 / 7 1 / 2 0 0 : 6 1 1 2 0 2 / 7 1 / 2 0 0 : 0 2 1 2 0 2 / 7 1 / 2 0 0 : 0 1 2 0 2 / 8 1 / 2 0 0 : 4 1 2 0 2 / 8 1 / 2 0 0 : 8 1 2 0 2 / 8 1 / 2 0 0 : 2 1 1 2 0 2 / 8 1 / 2 0 0 : 6 1 1 2 0 2 / 8 1 / 2 0 0 : 0 2 1 2 0 2 / 8 1 / 2 0 0 : 0 1 2 0 2 / 9 1 / 2 0 0 : 4 1 2 0 2 / 9 1 / 2 0 0 : 8 1 2 0 2 / 9 1 / 2 0 0 : 2 1 1 2 0 2 / 9 1 / 2 0 0 : 6 1 1 2 0 2 / 9 1 / 2 0 0 : 0 2 1 2 0 2 / 9 1 / 2 0 0 : 0 1 2 0 2 / 0 2 / 2 0 0 : 4 1 2 0 2 / 0 2 / 2 0 0 : 8 1 2 0 2 / 0 2 / 2 0 0 : 2 1 1 2 0 2 / 0 2 / 2 0 0 : 6 1 1 2 0 2 / 0 2 / 2 0 0 : 0 2 1 2 0 2 / 0 2 / 2 0 0 : 0 1 2 0 2 / 1 2 / 2 0 0 : 4 1 2 0 2 / 1 2 / 2 0 0 : 8 1 2 0 2 / 1 2 / 2 0 0 : 2 1 1 2 0 2 / 1 2 / 2 0 0 : 6 1 1 2 0 2 / 1 2 / 2 0 0 : 0 2 1 2 0 2 / 1 2 / 2 0 0 : 0 1 2 0 2 / 2 2 / 2 0 0 : 4 1 2 0 2 / 2 2 / 2 0 0 : 8 1 2 0 2 / 2 2 / 2 0 0 : 2 1 1 2 0 2 / 2 2 / 2 0 0 : 6 1 1 2 0 2 / 2 2 / 2 0 0 : 0 2 1 2 0 2 / 2 2 / 2 0 0 : 0 1 2 0 2 / 3 2 / 2 Customer #2 Burst Leak Water Use By Hour Frozen irrigation line burst near water meter s n o l l a G 1400 1200 1000 800 600 400 200 0 Total Demand Response Preliminary Analysis  Summary of public-side repair response, including main and service lines  Initial analysis of water main breaks  More than 1,500 emergency water turn off requests Financial Relief Achieved to Date JOSEPH GONZALES Assistant Director, Financial Services Winter Storm Bill Relief  Emergency Cut-off Fees Waived  Residential Rate Reduction • Reduce Tiers 3 – 5 volumetric rates to $0.01 per 1,000 gallons • Cap Tiered fixed fee at $3.55 (Tier 2)  Commercial & Multifamily Bill Adjustments  Wastewater Averaging Winter Storm Bill Relief  Residential Rate Relief • Temporary rate relief savings - $2,177,194  Commercial and Multifamily Bill Adjustments • Commercial bill adjustments applied - $437,653 • Multi-family bill adjustments applied - $702,094  Total Relief as of 3/23/21: Over $3.3 Million Additional Relief  Emergency Home Repair Program • Committed $1 million for emergency plumbing repairs  Plus 1 Payment Assistance Funding • Providing additional $5 million in residential payment assistance funding Austin Water’s Resiliency Efforts ANNA BRYAN-BORJA Assistant Director, Business Services Austin Water has a proactive Emergency Management program  National Incident Management System  Emergency Management Staffing  Departmental Operations Center  Training, Drills, Tabletop Exercises  Software for Incident Management, Continuity of Operations Planning Enterprise Resiliency is a Strategic Initiative at Austin Water  Ensure AW preparedness for and response to critical incidents is effective, practiced, and regularly reviewed.  Ensure water and wastewater operational resiliency through normal and emergent conditions.  Ensure utility resiliency by identifying and addressing natural hazard risks. Preparing for Future Emergencies  Bottled Water Distribution in 2018, 2021  AW purchased 60 water “totes”- 275 gallon tanks  Bulk Water Truck Austin Water Complies with America’s Water Infrastructure Act  October 2018: America's Water Infrastructure Act (AWIA) was signed into law  AWIA requires drinking water systems serving more than 3,300 people to develop or update risk assessments and emergency response plans (ERPs)  AW certified compliance with the risk assessment requirement in March 2020 and the ERP requirement in September 2020 America’s Water Infrastructure Act 2.0  AWIA requires recertification every 5 years  AW will repeat the process for the drinking water system every 2 years  In 2021, AW launched “AWIA 2.0” review process for wastewater system  AW will repeat the review of wastewater every 2 years Next Steps  Resilience Working Group  After Action Report Questions and Discussion Water and Wastewater Commission | April 7, 2021