SAWS SSO Reduction Program

SAWS Sanitary Sewer Overflow
Reduction Program
Jeff Haby, P.E.
Director – Sewer System Improvements
September 15, 2015
SA Military Engineers Meeting
September 15, 2015
Agenda
•
•
•
•
•
•
•
•
SAWS Overview
Consent Decree
CD Compliance Programs
Program Transition
Alternatives Analysis
Remedial Measures – Execution
Program Cost
SSO Reduction – Trends
SSO Reduction Program
Page 2
1
September 15, 2015
San Antonio Water System Overview
• 5,200 miles of sewer main
• 100,000 manholes
• 300 siphons
300 siphons
• 80 miles of force main
• 156 lift stations
• 3 waste water “recycling” plants
Page 3
SSO Reduction Program
September 15, 2015
CD Process
Section 308
Letter
Monitor
Draft CD
Negotiations
Implement
Final CD
SAWS SSO Reduction Program
Page 4
2
September 15, 2015
CD Timeline:
•
•
•
•
2007‐2013 Negotiations
July 23, 2013 Lodged
October 15, 2013 Entered
10‐12 Year Duration
SSO Reduction Program
Page 5
September 15, 2015
CD Requirements:
8 Major Components:
1. CMOM
2. Early Action Program
3. Condition Assessment & Remedial Measures
4. Capacity Assessment & Remedial Measures
5. Lift Stations
6. Force Mains
7. Water Quality Program
8. Reporting
SSO Reduction Program
Page 6
3
September 15, 2015
CMOM Program
SAWS SSO Reduction Program
Page 7
September 15, 2015
Develop Contracts for Support
SAWS SSO Reduction Program
Page 8
4
September 15, 20145
Smart Covers
SSOs Saved by Smart Covers
600
500
400
300
200
100
0
2009
2010
2011
2012
2013
SAWS SSO Reduction Program
2014
2015
YTD
Page 9
September 15, 20145
CMOM: Cleaning Schedule
“Clean the Right Pipe at the Right Time”
• Asset‐based
Asset based
• Cleaning Optimization Program
• Pipes are cleaned based on the maintenance window
d
SAWS SSO Reduction Program
Page 10
5
September 15, 20145
CMOM: Cleaning…What we find:
SAWS SSO Reduction Program
Page 11
September 15, 20145
“Flushables”
SAWS SSO Reduction Program
Page 12
6
September 15, 20145
CMOM: CCTV Inspection
Page 13
SAWS SSO Reduction Program
September 15, 20145
CMOM: Fats, Oils & Grease Program
Cleaning
FOG
Enforcement
SAWS SSO Reduction Program
Education
Page 14
7
September 15, 20145
Early Action Program
Phase I & II
Phase I:
Phase
I:
Defects identified (prior to January 1, 2013)
Phase II: Defected identified 18 months after January 1, 2015
SAWS SSO Reduction Program
Page 15
September 15, 20145
Condition Assessment:
A‐E Rating
SAWS SSO Reduction Program
Page 16
8
September 15, 20145
Condition Assessment Challenges
SAWS SSO Reduction Program
Page 17
September 15, 20145
Capacity Assessment:
Wet Weather Investigations & Field Verifications
• Investigate Wet Weather SSOs
• Identify partial blockages
– Addressed through maintenance/repair
• Perform field verification
– Flow meters
– Smart Covers
SAWS SSO Reduction Program
Page 18
9
September 15, 20145
Capacity Assessment Results
Hydraulic Grade Line Not Near Ground
SAWS SSO Reduction Program
Page 19
September 15, 20145
Capacity Assessment Results Modeled SSO and Actual SSO
SAWS SSO Reduction Program
Page 20
10
September 15, 20145
Maintenance, Monitor or Alternative Analysis
Page 21
SAWS SSO Reduction Program
September 15, 2015
SAWS SSO Reduction Program ‐ Phases
Program
Initiation
C
i & condition
di i
Capacity
assessment
Current
Transition
Alternatives
analysis &
planning
Future
Transition
CIP implementation - design and
construction
Today
SSO Reduction Program
Remedial
Measures
Plans to EPA
Page 22
11
September 15, 2015
Condition Assessment to Alternative Analysis
Data
Collection
Condition
Assessment
Next Step:
Alternatives
Analysis
80% Assessed
82% CCTV
SSO Reduction Program
Page 23
September 15, 20145
Capacity Assessment & Alternatives Analysis
Data
Collection
Capacity
Assessment
Next Step:
Alternatives
Analysis
SAWS SSO Reduction Program
Page 24
12
September 15, 20145
Referral for Alternatives Analysis
Block Map = 91.8 Acres
SAWS SSO Reduction Program
Page 25
September 15, 20145
Remedial Measures:
SAWS SSO Reduction Program
Page 26
13
September 15, 2015
Performance Measurement
Identifies Issues Early for Corrective Actions
SSO Reduction Program
Page 27
September 15, 2015
Schedule Milestone Review Process
Managing without Micromanaging
• Detailed schedules maintained by
maintained by engineers and contractors
• Program Management team monitors major milestones
SSO Reduction Program
Page 28
14
September 15, 2015
Reporting
Page 29
SSO Reduction Program
September 15, 2015
Program Cost
Projected Over 10 Yrs
Operating
Capital
Total
Total Investment After the Consent
Decree
$251.7 M
$840.4 M
$1.092 B
SSO Reduction Program
Page 30
15
September 15, 2015
SSO Trends
2009 ‐ 2014 High, Low, and Average
90
80
70
SSOs
60
50
Low 2009‐2014
40
High 2009‐2014
Average 2009‐2014
30
20
10
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
SSO Reduction Program
Page 31
September 15, 2015
SSO Trends
2015 vs 2009 ‐ 2014
90
80
70
SSOs
60
Low 2009-2014
50
High 2009-2014
40
Average 2009-2014
30
2015
20
10
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
SSO Reduction Program
Page 32
16
September 15, 2015
SSO Reduction Trends
2010‐2015 Cause
300
SSO Cause
250
STRUCTURAL
200
GREASE/D&R
LIFT STATION
150
RAIN EVENT
OTHER
100
VANDALISM
CONTRACTOR
50
0
2010
2011
SSO Reduction Program
2012
2013
2014
2015
Page 33
September 15, 2015
Discussion & Questions
SSO Reduction Program
Page 34
17