1. Water Resources Plan 2040 Update
Draft Conclusions and Recommendations
November 22, 2016

2. Analysis Demonstrates that MMWD’s Proactive Actions Have Significantly Improved Water Supply Resiliency
1979: Built Soulajule Reservoir
Increase storage by 10,000 AF
1981: Recycled water program
Saves 600 AFY of potable water
1982: Expanded Kent Dam
Raised 45-feet
Doubled storage capacity to 32,900 AF
1993: Aggressive conservation program & conservation-oriented rate structure
Increased supply imported from Sonoma County (provides 25% of water supply)

3. Increased Storage Implemented Over Time  Improved Resiliency
Expanded Kent Lake
Soulajule Reservoir
Nicasio Reservoir
Kent Lake
Expanded Alpine Lake
Bon Tempe
Reservoir

4. Efficient Water Use has reduced Demand and Improved Resiliency
Production is for fiscal year ending, and does not include recycled water or untreated water.

5. Process for Conducting Resiliency Analysis
Identify Events, Futures, and Options
Evaluate and Refine Preliminary Options
Identify Gaps / Needs (Shortfalls Under Event / Future Conditions)
Develop / Evaluate / Refine Alternatives to Address Gaps / Needs

6. Events and Futures Drought Climate Change Wildfire Earthquakes
Greatest Stressor
Historical recorded droughts and 6-year drought
Drought
Four climate change hydrology sets developed by USGS
Climate Change
Impacts to water quality at Kent, Bon Tempe, Alpine Lakes
Wildfire
Outages to Bon Tempe WTP, San Geronimo WTP, and imported supply
Earthquakes
Impacts to Kent and Alpine Lakes, Nicasio Lake, imported supply
Water Quality
Outages at Bon Tempe WTP, San Geronimo WTP, Alpine Lake
Landslides

7. Resiliency Options Water Use Efficiency Reuse Expand SCWA Conveyance
Expand Storage
Water Purchases and Groundwater
Desalination
Emerging Options

8. Key Information For Each Option
Description
Facilities Required
Sizing and Cost
Yield and Reliability (Average and Dry Year)
Implementation Considerations
Conceptual Map / Schematic

9. Preliminary Evaluation Criteria
Cost
Institutional Complexity
Local Control
Environmental Stewardship
Technical Complexity
Reliability
Public Support

10. Options Evaluation Developed 40 resiliency options
Used decision score and options costs to evaluate the 40 resiliency options in a tradeoff curve
Decision Score (benefits) vs. Cost
Options with lower cost/higher benefits were selected for alternatives development
High scoring options were selected for alternatives development and grouped into the following resiliency categories:
Expand existing programs
Minimize infrastructure
Dry Year actions
Maximize reuse
Maximize resiliency

11. Resiliency Analysis
Use storage reserves

12. Resiliency Alternatives: Group A
Meets demands during 6-year drought
No demand reduction
Maintains storage reserves
Alternative
Options
Dry Year Yield (AF)
Dry Year Actions
Enhanced Conservation
Spot Market Transfers
6,000
Maximize Reuse
Regional IPR
7,900
Maximize Resiliency
Kastania Pump Station Upgrade
Santa Rosa Plain Conjunctive Use
Watershed Management
11,000

13. Resiliency Alternatives: Group B
Meets 4 year drought demands
Encroaches storage reserves in years 5 & 6 of 6-year drought
To maintain storage reserves, requires demand reductions
Alternative
Options
Dry Year Yield (AF)
Expand Existing Programs
Enhanced Conservation
Santa Rosa Plain Conjunctive Use
Watershed Management
up to 1,200
Minimize Infrastructure
Kastania Pump Station Upgrade
3,900

14. Draft Conclusions and Recommendations

15. Conclusions & Recommendations
MMWD’s resiliency actions provide significant benefits
These resiliency actions will enable the district to survive a number of futures
Alternatives exist to address resiliency needs under the most extreme conditions
Adaptive Resiliency:
Continue water efficiency programs at current level; increase if necessary
Investigate low- or no- infrastructure alternatives (groundwater exchange)
Track hydrologic conditions and demand patterns

16. Next Steps

17. WRP 2040: Public Outreach Nov 22, 2016 DOC Dec 7, 2016 DRTF
Draft Conclusions and Recommendations
Nov 22, 2016 DOC
Public Workshop
Dec 7, 2016 DRTF
Admin Draft Report
Jan 20, 2017 DOC
Public Review Period
Feb 2017 Board
Review of public comments
Mar 2017 DRTF
Final WRP 2040
Apr 2017 DOC

18. Water Resources Plan 2040 Update
Draft Conclusions and Recommendations
November 22, 2016