National Renewable Energy Lab Study

Proposed Analysis of Alternatives for Navajo Generating Station:

Proposed Analysis of Alternatives for Navajo Generating Station NGS Stakeholders’ Strategy Meeting Phoenix, AZ David Hurlbut Senior Analyst March 28, 2011

NREL role in NGS stakeholder process:

NREL role in NGS stakeholder process Provide an objective assessment of clean energy options that are technically and economically feasible Inventory of utility-scale options Base load power needs of current NGS utility partners CAP pumping operations Inventory of options to provide clean power to local customers Navajo, Hopi, City of Page Utility-scale solutions and local solutions might not overlap completely Distributed generation options may be a better way of serving local demand 2

NREL role in NGS stakeholder process:

NREL role in NGS stakeholder process No recommendation on the options presented That’s for stakeholders to decide NREL will be a resource to all NGS stakeholders as they try to reach consensus on preferred options Provide clarity and additional information on options of interest Provide documentation of analysis that can be included in any stakeholder recommendation to EPA 3

Project management:

Project management NREL will conduct or participate in public meetings to present status and findings Phase 1: Develop base line information, finalize study design Phase 2: Detailed technical impact analysis 4

Phase 1:

Phase 1 Develop base line information Current utility resource plans and load forecasts CAP operational needs Dynamics of Southwest power market, especially with respect to base load capacity F inalize study design “Short list” of options for detailed analysis 5

Phase 2:

Phase 2 Develop metrics for comparing the options What will each option do? Local economic and health impacts Economic impacts Water use Utility system impacts Final report and briefings 6

NREL resource mapping: solar:

NREL resource mapping: solar Solar resource areas, filtered to include only flat terrain Slope less than 1% Dark red areas are highest quality solar 7

NREL resource mapping: wind:

NREL resource mapping: wind Wind resource areas, filtered to include only terrain that is not hilly Slope less than 20% Dark blue areas are highest quality wind 8

Regional renewable energy zones:

Regional renewable energy zones Western Governors’ Association, supported by NREL and Lawrence Berkeley National Lab Zones are already being used in regional planning Renewable potential that is good enough for a regional market Not a guarantee anything will be developed 9

NREL contacts:

David Hurlbut 303-384-7334 david.hurlbut@nrel.gov Scott Haase 303-274-3057 scott.haase@nrel.gov 10 NREL contacts