EXHIBIT BPROJECT OPERATION AND RESOURCE UTILIZATION

Klamath Hydroelectric Project(FERC Project No. 2082)

PacifiCorpPortland, Oregon

Version: February 2004

Copyright 2004 by PacifiCorpReproduction in whole or in part without the written consent of PacifiCorp is prohibited.

February 2004 PacifiCorpExhibit B.doc Exhibit B Page iii

CONTENTS

Section Page

B1.0 INTRODUCTION............................................................................................................. 1-1B1.1 EXISTING KLAMATH HYDROELECTRIC PROJECT OVERVIEW............... 1-2B1.2 PROPOSED KLAMATH HYDROELECTRIC PROJECT OVERVIEW............. 1-2B1.3 USBR KLAMATH IRRIGATION PROJECT ....................................................... 1-2

B2.0 FLOW REGULATION THROUGH EXISTING KLAMATHHYDROELECTRIC PROJECT .................................................................................. 2-1B2.1 INTRODUCTION................................................................................................... 2-1B2.2 FLOW REGULATION INTO AND OUT OF THE USBR PROJECT TO

THE KLAMATH HYDROELECTRIC PROJECT............................................. 2-6B2.3 FLOW REGULATION THROUGH THE PROJECT DURING SUMMER

AND/OR BELOW AVERAGE WATER YEAR................................................ 2-7B2.4 FLOW REGULATION THROUGH USBR AND KLAMATH

HYDROELECTRIC PROJECTS IN WINTER AND/ORHIGH WATER YEARS ...................................................................................... 2-7B2.4.1 Project Flood Control ............................................................................... 2-8

B2.5 OTHER OUT-OF-BASIN DIVERSIONS.............................................................. 2-8B2.5.1 Rogue River Basin Irrigation Project ....................................................... 2-8B2.5.2 City of Yreka Municipal Water Supply ................................................... 2-9

B3.0 FLOW REGULATION THROUGH THE PROPOSED KLAMATHHYDROELECTRIC PROJECT .................................................................................. 3-1

B4.0 HYDROLOGYEXISTING CONDITIONS................................................................ 4-1B4.1 PROJECT AREA HYDROLOGIC DRAINAGE AREA AND

FLOW REGIME.................................................................................................. 4-1B4.2 EXISTING HYDROLOGY AND FLOW AVAILABILITY................................. 4-2

B4.2.1 Hydrologic Data Sources for the Project Area......................................... 4-2B4.2.2 Average Daily Flow Rates ....................................................................... 4-3

B4.3 EXISTING INSTREAM FLOW RELEASES........................................................ 4-6

B5.0 HYDROLOGYPROPOSED CONDITIONS.............................................................. 5-1

B6.0 LINK RIVER DAM .......................................................................................................... 6-1B6.1 FACILITY OVERVIEW ........................................................................................ 6-1B6.2 OWNERSHIP AND CONTRACTUAL OBLIGATIONS ..................................... 6-1B6.3 EXISTING OPERATIONS..................................................................................... 6-2B6.4 FUTURE OPERATIONS ....................................................................................... 6-4

B7.0 EAST SIDE AND WEST SIDE DEVELOPMENTS..................................................... 7-1B7.1 INTRODUCTION................................................................................................... 7-1B7.2 EAST SIDE DEVELOPMENT OVERVIEW ........................................................ 7-1B7.3 EAST SIDE POWERHOUSE CONTROL............................................................. 7-1

B7.3.1 Annual Plant Factor.................................................................................. 7-2B7.3.2 Period of Critical Stream Flow, Average Annual Energy Production,

and Dependable Capacity ........................................................................ 7-2B7.3.3 Area-Capacity Curve and Rule Curve...................................................... 7-2

PacifiCorpKlamath Hydroelectric ProjectFERC No. 2082

February 2004 PacifiCorpExhibit B Page iv Exhibit B.doc

B7.3.4 Hydraulic Capacity................................................................................... 7-2B7.3.5 Tailwater Rating Curve ............................................................................ 7-2B7.3.6 Power Plant Capacity Versus Head Curve............................................... 7-2

B7.4 WEST SIDE FACILITY OVERVIEW................................................................... 7-2B7.4.1 West Side Powerhouse Control................................................................ 7-7B7.4.2 Annual Plant Factor.................................................................................. 7-7B7.4.3 Period of Critical Stream Flow, Average Annual Energy Production,

and Dependable Capacity ........................................................................ 7-7B7.4.4 Area-Capacity Curve and Rule Curve...................................................... 7-7B7.4.5 Hydraulic Capacity................................................................................... 7-9B7.4.6 Tailwater Rating Curve ............................................................................ 7-9B7.4.7 Power Plant Capacity Versus Head Curve............................................... 7-9

B7.5 EAST SIDE AND WEST SIDE DECOMMISSIONING....................................... 7-9

B8.0 KENO DEVELOPMENT................................................................................................. 8-1B8.1 INTRODUCTION................................................................................................... 8-1B8.2 DEVELOPMENT OVERVIEW............................................................................. 8-1B8.3 OWNERSHIP AND CONTRACTUAL OBLIGATIONS ..................................... 8-1B8.4 OPERATIONS........................................................................................................ 8-2

B8.4.1 Description of Plant Control .................................................................... 8-5B8.4.2 Keno Drawdown ...................................................................................... 8-5

B9.0 J.C. BOYLE DEVELOPMENT....................................................................................... 9-1B9.1 DEVELOPMENT OVERVIEW............................................................................. 9-1B9.2 OWNERSHIP AND CONTRACTUAL OBLIGATION ....................................... 9-1B9.3 OPERATIONS........................................................................................................ 9-1B9.4 ANNUAL PLANT FACTOR ................................................................................. 9-4B9.5 PERIOD OF CRITICAL STREAM FLOW, AVERAGE ANNUAL ENERGY

PRODUCTION, AND DEPENDABLE CAPACITY......................................... 9-4B9.6 AREA-CAPACITY CURVE AND RULE CURVE .............................................. 9-4B9.7 HYDRAULIC CAPACITY .................................................................................... 9-4B9.8 TAILWATER RATING CUR`VE.......................................................................... 9-9B9.9 POWERPLANT CAPACITY VERSUS HEAD CURVE...................................... 9-9

B10.0 COPCO NO. 1 DEVELOPMENT ............................................................................... 10-1B10.1 DEVELOPMENT OVERVIEW......................................................................... 10-1B10.2 OWNERSHIP AND CONTRACTUAL OBLIGATION ................................... 10-1B10.3 OPERATIONS.................................................................................................... 10-1B10.4 ANNUAL PLANT FACTOR ............................................................................. 10-2B10.5 PERIOD OF CRITICAL STREAM FLOW, AVERAGE ANNUAL

ENERGY PRODUCTION, AND DEPENDABLE CAPACITY...................... 10-2B10.6 AREA-CAPACITY CURVE AND OPERATING CURVE .............................. 10-2B10.7 HYDRAULIC CAPACITY ................................................................................ 10-2B10.8 TAILWATER RATING CURVE....................................................................... 10-2B10.9 POWERPLANT CAPACITY VERSUS HEAD CURVE.................................. 10-2

B11.0 COPCO NO. 2 DEVELOPMENT ............................................................................... 11-1B11.1 DEVELOPMENT OVERVIEW......................................................................... 11-1B11.2 OWNERSHIP AND CONTRACTUAL OBLIGATION ................................... 11-1

PacifiCorpKlamath Hydroelectric Project

FERC No. 2082

February 2004 PacifiCorpExhibit B.doc Exhibit B Page v

B11.3 OPERATIONS.................................................................................................... 11-1B11.4 ANNUAL PLANT FACTOR ............................................................................. 11-2B11.5 PERIOD OF CRITICAL STREAM FLOW, AVERAGE ANNUAL

ENERGY PRODUCTION, AND DEPENDABLE CAPACITY...................... 11-2B11.6 AREA-CAPACITY CURVE AND RULE CURVE .......................................... 11-2B11.7 HYDRAULIC CAPACITY ................................................................................ 11-2B11.8 TAILWATER RATING CURVE....................................................................... 11-3B11.9 POWERPLANT CAPACITY VERSUS HEAD CURVE.................................. 11-3

B12.0 FALL CREEK DEVELOPMENT............................................................................... 12-1B12.1 D