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Home My WebLink About2021-04-05 CC & PUB Joint Agenda and BackupCity Council City of Denton Meeting Agenda City Hall 215 E. McKinney St. Denton, Texas 76201 www.cityofdenton.com Council Work Session Room11:00 AMMonday, April 5, 2021 JOINT MEETING WITH THE PUBLIC UTILITIES BOARD Note: Mayor Gerard Hudspeth, Mayor Pro Tem Jesse Davis and Council Members Birdia Johnson, Connie Baker, John Ryan, Deb Armintor and Paul Meltzer will be participating in the work session via video/teleconference. Further, the Public Utilities Board Members will be participating via video/teleconference which will be duly noted within their respective agenda After determining that a quorum is present, the Joint Meeting of the City Council of the City of Denton and the Public Utilities Board will be held on Monday, April 5, 2021, at 11:00 a.m. in the Council Work Session Room at City Hall, 215 E. McKinney Street, Denton, Texas at which the following items will be considered: WORK SESSION 1. Work Session Reports Receive a report, hold a discussion, and give staff direction regarding processes, impacts, and results of service delivery during the February 2021 inclement weather event by the following department: 1.Water/Wastewater Utilities ID 21-621A. The City Council and Public Utilities Board reserve the right to adjourn into a Closed Meeting or Executive Session as authorized by Texas Government Code, Section 551.001, et seq. (The Texas Open Meetings Act) on any item on its open meeting agenda or to reconvene in a continuation of the Closed Meeting on the Closed Meeting items noted above, in accordance with the Texas Open Meetings Act, including, without limitation Sections 551.071-551.086 of the Texas Open Meetings Act. C E R T I F I C A T E I certify that the above notice of meeting was posted on the official website (https://www.cityofdenton.com/en-us/government/open/agendas-minutes) and bulletin board at City Hall, 215 E. McKinney Street, Denton, Texas, on April 2, 2021, in advance of the 72-hour posting deadline, as applicable, and in accordance with Chapter 551 of the Texas Government Code. __________________________________________ CITY SECRETARY NOTE: THE CITY OF DENTON'S DESIGNATED PUBLIC MEETING FACILITIES ARE ACCESSIBLE IN ACCORDANCE WITH THE AMERICANS WITH DISABILITIES ACT. THE CITY WILL PROVIDE ACCOMMODATION, SUCH AS SIGN LANGUAGE INTERPRETERS FOR THE HEARING IMPAIRED, IF REQUESTED AT LEAST 48 HOURS IN ADVANCE OF THE SCHEDULED MEETING. PLEASE CALL THE CITY SECRETARY'S OFFICE AT 940-349-8309 OR USE TELECOMMUNICATIONS DEVICES FOR THE DEAF (TDD) BY CALLING 1-800-RELAY-TX SO THAT REASONABLE ACCOMMODATION CAN BE ARRANGED. Page 1 Printed on 4/6/2021 1 April 5, 2021City Council Meeting Agenda Page 2 Printed on 4/6/2021 2 City of Denton Legislation Text City Hall 215 E. McKinney St. Denton, Texas 76201 www.cityofdenton.com File #:ID 21-621,Version:1 AGENDA CAPTION Receive a report, hold a discussion, and give staff direction regarding processes, impacts, and results of service delivery during the February 2021 inclement weather event by the following department: 1.Water/Wastewater Utilities City of Denton Printed on 4/2/2021Page 1 of 1 powered by Legistar™3 City of Denton _____________________________________________________________________________________ AGENDA INFORMATION SHEET DEPARTMENT: Finance ACM: David Gaines DATE: April 5, 2021 SUBJECT Receive a report, hold a discussion, and give staff direction regarding processes, impacts, and results of service delivery during the February 2021 inclement weather event by the following departments: 1. Water/Wastewater Utilities BACKGROUND On February 14, 2021, severe inclement weather impacted the City of Denton and resulted in unprecedented demand for services which impacted departments city-wide. An emergency/disaster event of this magnitude required a thorough review of departmental processes, impacts, and results of service delivery. Staff in various departments have been asked to update City Council in the following areas as applicable to their respective service delivery areas (City Utilities to also update Public Utilities Board): 1. What were the intended results of your department operation/s? 2. What was supposed to happen during this weather event under your departments areas of responsibilities? 3. What were the actual results? What actually happened under your departmental areas of responsibilities? Did you have to vary operations under these circumstances? If so, what? 4. What caused the results of your operations and what were the differences, if any. 5. What worked, what did not and why? 6. What will we sustain and what do we need to improve regarding the operations of your areas of responsibilities? At Mayor Hudspeth’s request, City Council was asked to provide any potential questions in advance of department presentations in an effort to provide streamlined discussions. Answers to questions received will be incorporated into the presentations if/when at all possible. City Hall 215 E. McKinney Street Denton, Texas www.cityofdenton.com 4 EXHIBITS 1. Agenda Information Sheet 2. Presentation – Water/Wastewater Utilities Respectfully submitted: Antonio Puente, Jr. Executive Manager of Utilities 5 Winter Storm Report Pritam Deshmukh & Terry Naulty Water/Wastewater Utilities April 5, 2021 Legistar ID 21-621 1 of 12 6 Agenda Water •Operations •Impact •Change in Operation •Cause •Lessons Learned/Improvements Wastewater Public Communication/Boil Water Advisory Lessons Learned and Improvement Opportunities What Worked 2 2 of 12 7 Water Department Operations 3 •Treatment: Two water treatment plants function normally to produce a typical winter demand of 13-15 MGD •Ray Roberts: 3-5 MGD •Lake Lewisville: 10 MGD •Storage Capacity (25 MG): •5 Elevated (11 MG) •3 Ground Storage Tanks (Clear wells 14MG) •Distribution Pressure: between 50 to 80 psi. •Metering: Approx. 39,000 residential meters 3 of 12 8 What Happened and Why 4 WHAT HAPPENED Not able to maintain constant treatment plant output •Rolling Power Outages and Freezing Peak water demand 100% higher than normal (30 MGD) due to ‘dripping faucets’ despite conservation requests Why •Treatment: •Ray Roberts treatment facility had severe impacts due to rolling outages •5 outages in 6 hours on Monday (2/15) •Ozone Generator failure •Failure of Backup Generators •Frozen chlorine feed lines •Lake Lewisville treatment facility •Intake pump issues (Electrical Phase Imbalance) •Limited water production capacity •Resulted in water production capacity that could not match demand for three days (Mon -Wed) 4 of 12 9 What Happened and Why 5 •Storage: Significant drop in water levels at all storage facilities (10 to 15% full) •Distribution: Higher than normal main breaks due to freezing temperatures •Avg 3 breaks/week •Feb 13 to Feb 20 had 16 water main breaks •Metering: Significant increase in calls from residents primarily to turn water off or report leak •Avg 90 tickets/week •Feb 13 to Feb 20 had 740 tickets •Other: •Staffing •Unreliable Communication •Transportation 5 of 12 10 Mitigation -Change in Operation 6 •Issued notice requesting residents to conserve water •Treatment: •Ray Roberts treatment facility •Monday (2/15) afternoon switched to Generators •Continuous power supply restored. •Replaced damaged electronic components for the Ozone Generator •Changed the chlorination process -began using bleach to chlorinate •Lake Lewisville treatment facility •Electric Supply Phase Imbalance -Water and DME staff worked tirelessly for three days trouble shooting and implementing interim solutions until they found and fixed the issue. •Focused on stabilizing plant operations and increasing water production capacity to meet the demand -30 MGD 6 of 12 11 Mitigation -Change in Operation 7 •Storage: Constantly tracked water levels at all storage facilities and isolated/removed the Roselawn tank from the system. •Distribution: Deployed wastewater crews to help with the considerable high number of main breaks •Metering: Significant increase in calls from residents •Significant overtime to address shut off water (280 hrs OT) (maintain/improve tank levels) •Customer service staff helped with the increase call volume (80 hrs OT) •Wastewater staff helped with the considerably high number of resident concerns 7 of 12 12 Pecan Creek Basin Hickory Creek Basin Cooper Creek Basin Clear Creek Basin Robson Ranch 8 Wastewater Department Operations •Weather Impacts •PCWRP saw 45% increase in flows as compared to normal Feb week •Sludge line freeze up at PCWRP •Filter backwash system freeze up at Robson Ranch reclamation plant •Bio-diesel and diesel fuel thickening impacted generators used for lift stations impacted by rolling outages. •All issues were handled without incident •Staff provided assistance to Water Production 8 of 12 13 Timeline –Public Communication 9 Date and Time Water System Status Public Notification 02-16-21 6:49pm Water Levels in Storage Tanks begin dropping below acceptable levels Conserve water notice 02-17-21 3:09pm Water Levels in Storage Tanks improving (at 20%) Conserve water notice 02-17-21 5:38pm Pressure drop below 20 psi Boil water notice 02-19-21 1:21pm Pressure stabilized and Levels in Storage Tanks steadily increasing (at 65%). Sampling and Analysis Boil water notice update 02-20-21 7:49am Water Quality Results received Saturday (2/20) morning Boil Water Notice Cancelled 9 of 12 14 Action Items and Improvement Opportunities 10 Issue Description Options/Solutions Public Communication Messaging Clarity Pre-determined messages Timing of Notices Improved SOP/Emergency Plans Social Media Response Policy Issues (PIO) Weatherization RR Chlorine System Redesign/Weatherize (RR Regulatory Upgrade) Tank Level Instruments Weatherize/Power Supply WW Sludge Line Solids Handling Project Robson Ranch Backwash Decommissioning in 2022 Flushing Truck Bay Backup Generator for heating the storage bays Power Supply RR Back-up Generators Upgrade Generator Controls (RR Regulatory Upgrade SOW) Critical Load Designation Verify critical load designation annually LL Intake Pumps Resolved Boil Water Advisory Conflicting Information New Communication Protocols for loss of pressure vs. Main Break Ability to Boil Water without Electricity Bottled Water/In-house capabilities Other Chemical Inventory Set new Winter Inventory Levels Emergency Planning and Management Develop and Implement Incident Command System (NIMS) Staffing-I&C Personnel Review Staff Levels/Cross Training Locating Facilities (meters, waterlines, etc.) Geocode water/wastewater infrastructure, update GIS database Diesel Fuel gelling Additives 10 of 12 15 What Worked 11 •Our Amazing Staff and their dedication •Teamwork •Our in-house lab helped us quickly turnaround the results and remove the boil water advisory •Staff from several departments came together for helping the water department staff to address the issues •Strong Leadership Team (CMO) that Constantly Supported Staff •Constant and clear lines of communication among City staff •Constant communication with residents C O M M U N I C A T I O N 11 of 12 16 Questions 12 12 of 12 17