Clean Water Integrated Plan
Spokane River ForumMarch 26, 2013
Water Quality+
Innovation+
Regulation+
Finances=
Opportunity
The Next Phase
Largest infrastructure investment in City’s history
Balance environmental & financial constraints
Responsible use of the public’s money Add stormwater Allow innovation Leverage our investment into better
neighborhoods, a better City, a healthier economy
The Opportunity
◦WET WEATHER Discharges to the River Stormwater and CSO
◦COMPREHENSIVE SOLUTION Regulatory requirement Stakeholder engagement Best value for our investment
Integrated Plan
We want a cleaner River faster.◦ Prioritize work that has a greater
impact on pollutants.
We want to implement cost-effective and innovative technologies.◦ Add “green” technologies.
We want holistic integration with other critical infrastructure.◦ Solve multiple problems◦ Better streets, new water mains, better parks…
The Plan’s Goals
Prioritize by greatest reduction of pollutants◦Volume versus frequency◦Adding Stormwater
Cleaner River Faster
Initial look: Removing prioritizing stormwater greater pollutant reduction over smaller CSO basin for:
TSSHeavy metalsEven phosphorus
Media Filtra-tion
26 34 24 & 25 33 6 12 23 41 14 & 15 7 22 190
50,000
100,000
150,000
200,000
250,000
300,000
350,000
400,000
342,895
27,97622,296
13,067 10,467 7,898 5,807 2,169 568 558 471 45 0
TSSA
vera
ge A
nnual P
olluta
nt
Rem
oval (l
bs/y
r)
Media Filtra-tion
26 34 24 & 25 33 6 12 23 41 14 & 15 7 22 190
1
1
0.27
0.14
0.11
0.07 0.05 0.04 0.03 0.01 0.003 0.003 0.002 0.0002 0.000002
Total CadmiumA
vera
ge A
nnual P
olluta
nt
Rem
oval (l
bs/y
r)
Media Filtra-tion
26 34 24 & 25 33 6 12 23 41 14 & 15 7 22 190
5
10
15
20
25
30
35
32.0
4.8
3.9
2.3 1.8 1.4 1.00.4 0.1 0.1 0.1 0.0 0.000
Total CopperA
vera
ge A
nnual P
olluta
nt
Rem
oval (l
bs/y
r)
Media Filtra-tion
26 34 24 & 25 33 6 12 23 41 14 & 15 7 22 190
50
100
150
200
250
300
350
290.2
14.211.3 6.6 5.3 4.0 2.9 1.1 0.3 0.3 0.2 0.0 0.00
Total ZincA
vera
ge A
nnual P
olluta
nt
Rem
oval (l
bs/y
r)
Media Filtra-tion
26 34 24 & 25 33 6 12 23 41 14 & 15 7 22 190
5
10
15
20
25
30
27.13
5.35
4.27
2.50 2.00 1.51 1.110.41 0.11 0.11 0.09 0.01 0.0001
Total LeadA
vera
ge A
nnual P
olluta
nt
Rem
oval (l
bs/y
r)
Media Filtra-tion
26 34 24 & 25 33 6 12 23 41 14 & 15 7 22 190
50
100
150
200
250
300
350
303.8
86.0
68.5
40.232.2
24.317.8
6.7 1.7 1.7 1.4 0.1 0.0
Total PhosphorusA
vera
ge A
nnual P
olluta
nt
Rem
oval (l
bs/y
r)
26 34
24 &
25 33 6 12 23 41
14 &
15
Media
Filt
ratio
n 7 22 190
50,000
100,000
150,000
200,000
250,000
300,000
350,000
400,000
450,000
418,935
333,888
195,679
156,739
118,276
86,957
32,477
8,499 8,358 7,365 7,047 678 5
Fecal ColiformA
vg.
Annual P
olluta
nt
Rem
oval (B
illions o
f C
FU
/yr)
Design Criteria Basin Prioritization Right-sizing CSO storage Green solutions Alternatives strategies
The Method
Methodical selection process Ranking based on goals Policy maker and project team interface Communication with stakeholders
Structured Decision Criteria
MODAMultiple objective decision analysis
GOAL:Decide upon the best mix of CSO and stormwater projects that will remove as many pollutant as rapidly as possible with the highest additional public benefit at the lowest long-term life cycle cost.
Criteria:◦ System benefits and risks ◦ Environmental outcomes◦ Community outcomes◦ Operations & maintenance considerations◦ Life cycle costs
Decision Criteria
Accelerate work in 3 basins that have the greatest impact.
Basin Prioritization
THE BIG 3•CSO Basin 26
•CSO Basin 34
•COCHRAN STORMWATER BASIN
Next Steps--Prioritize:
•Remaining CSO Basins
•Large Stormwater Basins
Status-BIG 3: CSO Basin 34
•Constructing two tanks in 2013
•Evaluating remaining storage needs
◦Preliminary design◦Evaluating sites
Status-BIG 3: CSO Basin 26
Evaluating projects Analyzing flow
Status-BIG : Cochran Basin
2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 -
2,000,000
4,000,000
6,000,000
8,000,000
10,000,000
12,000,000
2,974,791 3,194,870
8,444,710
5,294,018
7,562,910
4,528,233
2,830,294
8,465,920
1,889,009 2,376,078
4,582,487
CSO Basin 34 Largest CSOs2002-2012
Largest Second Third Fourth Fifth
CSO
Event
Volu
me (
gallons)
Current DesignVolume: 11.4 MG
Right-sizing CSO StorageOne overflow per year
based on a 20-year moving average
We want to implement cost-effective and innovative technologies.
We want holistic integration with other critical infrastructure
Innovative & Holistic
Integrate:StreetsParksWaterWastewaterSidewalksPed / BikeGolf CoursesGreenwaysStreet Trees
Deliver plan by December 2013 Construct BIG 3 by 2017 AND as many more basins as we can
Timeline
Deliver Integrated Plan
Dec. 2013
2017Today
Thank you!More to come