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