TC TABLE OF CONTENTS GLOSSARY OF KEY TERMS 2 I EXECUTIVE SUMMARY 3 II MODELING METHODOLOGY 5 SPP Load Scenarios 6 EnergyPATHWAYS Modeling 7 EnergyPATHWAYS: SPP Customization 12 III RESULTS 22 IV DISCUSSION & CONCLUSIONS 30 V APPENDIX 32 EnergyPATHWAYS 32