Geothermal Collaborative Summit

Transmission SessionJune 9, 2005

Ronald DavisDavis Power Consultants

Strategic Value Assessment

• SVA is a methodology for evaluating renewable technology benefits– Assess renewable technology resource potential for

meeting RPS goals– Identify key focus areas– Evaluate economics and timeframe– Evaluate points of interconnection– Consider solutions with environmental, economic and

non-energy benefits– Provide solutions that can defer transmission

upgrades and reduce transmission congestion– Prioritize renewable implementation and transmission

infrastructure needs

Strategic Value Analysis Approach

Geothermal Technical Potential

Statewide technical

potential over 3800 MW

GeothermEx’s Resource

Assessment of Generating

Capacities of Major Geothermal

Resource Areas in MW

LEGEND

Minimum Most LikelyIncremental Incremental Minimum Most Likely Total Total0 100

LasVegas

Reno

Geothermal project

(no operatingGeothermal prospect

(with operating

PRP REGIONAL BASE MAY03.DWG

MILES

power plant)

power plant)

590 / 1,6301,100 / 2,140

230 / 450 1,230 / 1,450

170 / 450170 / 450

Imperial Valley:

Geysers Area:

Medicine Lake:

340 / 850510 / 1,030

Greater Reno:

680 / 1,9401,250 / 2,510

HVDC Area Total:

1,000 / 2,570 2,510 / 4,080

Non-HVDC Area Total:

2017 Projected WTLR Locations

MARIPOSA

MADERA

FRESNO

MERCED

TULARE

KINGS

MONTERREY

SAN BENITO

SANTA CLARASANTA CRUZ

INYO

MONO

STANISLAUS

PWR 1PWR 1

PWR 1

TOULUMNE

ALPINE

CALAVERAS

AMADOR

EL DORADO

SAN MATEO

ALAMEDA

MARIN

CONTRA COSTA

SAN JOAQUIN

SACRAMENTO

YONO

SOLANO

NAPA

SONOMA

LAKE

MENDOCHINO

COLUSA

SUTTER

BUTTEGLENN

PLACER

NEVADA

SIERRA

YUBA

PLUMAS

TEHAMA

TRIMITY

HUMBOLDT SHASTA

LASSEN

MODOC

SISKIYOU

DEL NORTE

SAN LUIS OBISPO

KERN

SANTA BARBARA

VENTURA

LOS ANGELES

SAN BERNARDINO

RIVERSIDE

IMPERIAL

SAN DIEGO

ORANGE

Projected Hot Spots vs Geothermal Potential

Detail on The Geysers

Detail on Imperial County Area

Transmission Questions

• How do we get utilities and developers to provide technical and location data?

• How can we evaluate potential geothermal areas without infringing on confidentially?

• How can we best address California transmission issues with geothermal development?

• How can we get all parties to participate and incorporate this new methodology into their analysis?