Michael L. King December 13, 2011

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 Used for mitigation of the Salton Sea  Salton Sea becomes hyper- saline in 15 years without QSA transfer  Historic return flows remain and crop water use transferred for a 15-year period  Environmental mitigation required  Socio-economic mitigation required  Loss of business and jobs in the Imperial Valley  Impacts to farm lease prices 5

Identified the most probable range of on-farm and system actions to be taken to save water to meet the QSA Water Conservation Schedule Identified the on-farm incentive structure that will encourage the required amount of savings Established a way to verify the savings Demonstrated conservation actions that work Provide accurate measurement with the most cost- effective approach Automatic water balance, data collection, data storage and data quality control required for verification computations Assured that all actions proposed are integrated, cost- effective, implementable, and acceptable

7 On-Farm 280,000 af 200, ,000 af 159,000 af System 33,000 af 103, ,000 af 144,000 af

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22 Sites Conservation yield approx. 40,000 AF 9

System Conservation Plan (SCP) Framework – Reduce system spills by 60% or more – Improve water measurement – Remote monitoring of lateral spills – Intercept and/or “intertie” spills back to delivery system where practical – Where there are no interties or in-lateral storage, back water out of laterals to the main canals – Provide conservation & operations decision tools to zanjeros and water operators – Least cost solution to preserve revenue for on-farm conservation 10

1.Water Delivery Measurement 2.Integrated Information Management (IIM) 3.Mid-lateral reservoirs 4.Lateral Interties 5.Mid-Valley Collector System 6.Minor System Improvements 11

Provide accurate measurement with the most cost-effective approach for all deliveries Provide continuous measurement to compute volume of delivered water Provide display of flow rate and total volume at the gate for customers Keep operations and maintenance costs low Facilitate improved lateral operation 12

Major Components A.SCADA and Zanjero notebook computers B.Lateral headgate automation & measurement C.Spill measurement and monitoring D.Integration of delivery measurement 13

Upgrades to communications backbone Upgrades to office computers, databases and networks Zanjero notebook computers Monitoring of Deliveries Control and monitoring of new automated canals Control and monitoring of new reservoir facilities 14

233 New lateral automated headings 118 New spill monitoring 15

3 Different Types In-line gravity reservoirs on EHL Laterals (8 AF) Pumped reservoirs on other laterals (12-75 AF) Gravity reservoirs on other laterals (40, 60 AF) 16

48 Identified 36 Selected 12 Future Options 17

Existing Check for WL Control Existing Check for WL Control Top of Lining Ground surface 18 New Automated Flow Control Gate Existing Delivery Gate

2 Different Types Gravity connection to adjacent lateral via concrete –lined channel or pipeline (1,300- 7,900 ft) Terminal reservoirs (8-60 AF) with pump/pipeline connections to adjacent canal (2,400-4,400 ft) 19

35 Identified 26 Selected 9 Future Options 20

4 Main Components Rose Canal upgrade and reservoir (150 AF) Rose extension, Rose-Moorhead reservoir (50 AF) Redwood upgrade, Moorhead upgrade Westside Main Canal #1 reservoir (300 AF), pump/pipeline Westside Main Canal #2 reservoir (100 AF), pump/pipeline 21

4 Main System Reservoirs Upgrade Sperber Reservoir Outlet 3 Main pipelines 4 Upgraded canals 22

Cumulative Efficiency Conservation  Efficiency Conservation Cost ($/acre-foot)  The cost to conserve additional water by efficiency conservation within the Imperial Irrigation District will be very expensive. Where IID is today.

Item Range (Acre-Feet/Year) Integrated Information Management (IIM)* 13,80017,000 Mid-lateral Reservoirs25,70031,600 Lateral Interties15,00018,500 Mid-Valley Collector*5,5007,000 Minor System Improvements 200 SCP Total 60,20074, * * IIM and mid-valley collector are required for conservation from the other elements

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