Baltimore City Department of Public Works

Transcription

1 Baltimore City Department of Public Works Bureau of Water and Wastewater WHEN IT BREAKS, IT POURS January 16, 2014

2 Presentation Outline Overview of Baltimore Water System Light Street Main Break Asset Management Plan 2

3 Baltimore Metropolitan Water System Overview 3,800 miles of distribution mains 13 Pressure Zones >300 miles of large diameter mains 70,000 Valves Average pipe age is 75 years 23,000 Hydrants 3

4 Baltimore Metropolitan Water System Overview 403,000 customer accounts 4 wholesale customers Fully regulated enterprise fund Serves 1.8 million people in Baltimore City and County 4

5 Baltimore Metropolitan Water System Overview When Anchor it Breaks, Institutions Pours Meeting, Chesapeake December AWWA January 11, ,

6 Baltimore Metropolitan Water System Overview When Anchor it Breaks, Institutions Pours Meeting, Chesapeake December AWWA January 11, ,

7 Most Breaks Don t Make the News Baltimore averages 1,000 water main breaks every year. 7

8 Presentation Outline Overview of Baltimore Water System Light Street Main Break Asset Management Plan 8

9 Light Street Water Main Break Case Study July 16 th, :00 pm High volume roadway 5 traffic lanes Rush hour 98 degrees Height of tourist season 6 weeks before the Grand Prix event 9

10 Light Street Water Main Break July 16, :00 pm 1 0

11 Light Street Water Main Break Case Study 11

12 Light Street Water Main Break Case Study Main shut down by 2:00 am Extensive roadway damage Executive decision made Contracted out repair 12

13 Light Street Water Main Break July 17, 2012 Press conference the next day Office of Emergency Management Mayor DOT Downtown Partnership 13

14 Light Street Water Main Break Case Study When Anchor it Breaks, Institutions Pours Meeting, Chesapeake December AWWA January 11, ,

15 Light Street Water Main Break Case Study When Anchor it Breaks, Institutions Pours Meeting, Chesapeake December AWWA January 11, ,

16 The Culprit 16

17 Light Street Water Main Break Roadway Restoration When Anchor it Breaks, Institutions Pours Meeting, Chesapeake December AWWA January 11, ,

18 Light Street Water Main Break August 20,

19 Presentation Outline Overview of Baltimore Water System Light Street Main Break Asset Management Plan 19

20 Utility Asset Management New division within the Bureau of Water and Wastewater Major goals: Shift from reactive maintenance to proactive maintenance Develop sustainable cost structure for managing assets Justify infrastructure investments Provide transparency to ratepayers Ultimately use asset data to inform the Integrated Planning Framework (IPF) 20

21 Strategy for Managing PCCP PCCP Transmission Mains PCCP Small Segments Desktop Risk Assessment Detailed NDT Inspection (acoustic, visual, electromagnetic condition assessment) Survey Level Inspection (acoustic assessment of condition) Actions: a. Immediate Replacement b. Rehabilitation/Repair c. Comprehensive CIP Project d. Monitoring through AFO e. Reduce Operating Pressure f. No Action Actions: a. Schedule for Replacement b. No Action Update Condition Data and Risk Assessment Model 21

22 PCCP Risk Management A Small Success By being proactive and using the latest technology, we prevented a problem in 2012 on a 54-inch transmission main. PipeDiver PCCP Broken wires SW Main 22

23 Strategy for Managing Ferrous Mains Recently created risk model for water distribution system Based on several factors of condition and criticality Plan to make this a dynamic model and further refine asset data Initiating survey level condition assessment in portion of distribution and transmission mains Using non-invasive acoustic technology that provides composite view of pipe condition On the radar: developing risk model for large diameter ferrous transmission mains Criticality Score 5 1 Low Risk Zone Moderate Risk Zone 1 5 Condition Score High Risk Zone 23

24 Questions and Discussion Madeleine Driscoll, P.E. Baltimore City DPW Chief, Utility Asset Management Division 24