Water System Adaptation l Approach: u Invest in actions that mitigate uncertainty and enhance flexibility and resiliency so that system managers can continue to meet their responsibilities. l Identify potential impacts through downscaling and characterizing system specific strengths and vulnerabilities l Adjust operations to test system flexibility l Develop portfolio of adaptation options l Engage in ongoing research & collaborate Portfolio of Adaptation Options l SPU identified a series of intra-system modifications and new supply options – and grouped them into Tiers. l Applied the effects on supply using Tier 1 intra-system modifications. l Where Tier 1 modifications did not restore supply fully, identified the need for subsequent Tiers. Tier 1 Solutions/Optimize Existing Supply l Modify storage level of Cedar Reservoir and replace overflow dike l Change rule curve/operating procedures for the Tolt Reservoir l Make modifications to Lake Young Reservoir Next Tiers Available to SPU l Tier 2 – Next Tier of Intra-System Modifications u Include additional use of Lake Youngs Storage (402-497) u Modified/optimized conjunctive use operations u Additional conservation programs after 2030 l Tier 3 – Greater Use of Storage u Higher refill levels at Chester Morse Lake (1566') u Higher flood pool level at CML (assumes max level increased to 1575) l Tier 4 – New Supply Alternatives u Deeper drawdown of South Fork Tolt reservoir (1660’) u Deeper drawdown of Lake Youngs (28’), Cedar Filtration u Use of Dead Storage for normal supply, after pumping plant replacement u Develop North Fork Tolt Diversion u Develop Snoqualmie Aquifer Project u Northshore and Woodinville develop Weyerhaeuser/Everett supply u Reclaimed water projects in Retail Service Area u Additional conservation programs l Tier 5 – New Supply Concepts u Reclaimed water projects in Wholesale Service Area u Desalination plant u Higher refill levels at Tolt reservoir (raising ring gate) u Etc. [...]... Example: Tying Together Service Levels, Lifecycle Costing, and the Triple Bottom Line $ Environmental/ social costs Claims costs Labor and equip costs 100+ 90 100% Reactive 80 70 60 50 40 30 20 10 5 100% Proactive Estimated Number of Sewer Backups per Year A Sample “Bathtub Curve” for the Sewer Maintenance Program Curve” An Example: Tying Together Service Levels, Lifecycle Costing, and the Triple Bottom... 50 40 30 20 Estimated Number of Sewer Backups per Year 10 5 100% Proactive A Sample “Bathtub Curve” for the Sewer Maintenance Program Curve” An Example: Tying Together Service Levels, Lifecycle Costing, and the Triple Bottom Line $ Regulatory non-compliance costs Environmental/ social costs Claims costs Chemical root treatment costs Labor and equip costs 100+ 90 100% Reactive 80 70 60 50 40 30 20 10... Backups per Year A Sample “Bathtub Curve” for the Sewer Maintenance Program Curve” An Example: Tying Together Service Levels, Lifecycle Costing, and the Triple Bottom Line $ Regulatory non-compliance costs Environmental/ social costs Grease abatement costs Claims costs Chemical root treatment costs Labor and equip costs 100+ 100% Reactive 90 80 70 60 50 40 30 20 Estimated Number of Sewer Backups per... costs Claims costs Chemical root treatment costs Labor and equip costs 100+ 100% Reactive 90 80 70 60 50 40 30 20 Estimated Number of Sewer Backups per Year 10 5 100% Proactive A Sample “Bathtub Curve” for the Sewer Maintenance Program Curve” . Curve ” ” for the Sewer Maintenance Program for the Sewer Maintenance Program An Example: Tying Together Service Levels, Lifecycle Costing, and the Triple Bottom Line 100+90807060504 030 2010 5 Estimated. Curve ” ” for the Sewer Maintenance Program for the Sewer Maintenance Program An Example: Tying Together Service Levels, Lifecycle Costing, and the Triple Bottom Line 100+90807060504 030 2010 5 Estimated. Curve ” ” for the Sewer Maintenance Program for the Sewer Maintenance Program An Example: Tying Together Service Levels, Lifecycle Costing, and the Triple Bottom Line 100+90807060504 030 2010 5 Estimated