U.S. Geothermal

Mission

Become the largest pure play independent geothermal power producer in North America.

2020 Goal:

Neal Hot Springs

U.S. Geothermal’s flagship project and Oregon’s first commercial Geothermal power plant. It came on-line in November 2012.

Equity Partner: Enbridge (40%), $36 B Energy Pipeline Co.

Project Loan: Lender - U.S Dept. of Energy, Fixed 2.6% APR, 22-year term, $61.8 M balance (2/29/16), 60% USG / 40% Enbridge.

Power Sales Contract: Idaho Power Company, 25-year term, Contract Average Energy Price $126.36 per megawatt-hour.

22 net MW (annual average): Air Cooled, 30 MW (winter), 14 MW (summer).

High Reliability: Availability 2015 average 97.9% (excluding schedule annual overhaul).

San Emidio Power Plant

Near-Term expansion opportunity, went on-line in May 2012.

Equity Partner: None.

Project Loan: Lender - Prudential Insurance, Fixed 6.75% APR, 24-year term, $29.7 million balance (2/29/16).

Power Sales Contract: NV Energy, 25-year term, Contract Average Energy Price $103.52 per megawatt-hour.

10 net MW (annual average): Water Cooled.

High Reliability: Availability 2015 average 98.6% (excluding schedule annual overhaul).

Raft River Power Plant

Pacific Northwest and Idaho’s first Geothermal power plant. It went on-line in January 2008.

Equity Partner: Goldman Sachs (5%), Tax equity ownership structure.

Project Loan: None.

Power Sales Contract: Idaho Power Company, 25-year term, Contract Average Energy Price $66.22 per megawatt-hour, Contract Average REC price $7.10.

13 net MW (annual average): Water Cooled, 10 MW current production.

High Reliability: Availability 2015 average 95.4% (excluding schedule annual overhaul)

Development Projects

Advanced development projects near term expectations:

WGP Geysers Project - California

Expected plant size 30 MW net. Expected on-line date - 2018. Expected cost to build $150 M. Qualified for 30% investment tax credit. Status – 5 wells drilled with 30 MW of steam currently available for production.

El Ceibillo - Guatemala

Expected plant size 25 MW net. Expected on-line date (phase 1) - 2018. Expected cost to build (phase 1) $140 M. Qualified for 10 year income tax holiday. Status – production well drilling in progress.

San Emidio II - Nevada

Expected plant size 10 MW net. Expected on-line date (phase 2) - 2017. Expected cost to build (phase 2) $60 M. Qualified for 30% investment tax credit. Status – production well drilling in progress.

Crescent Valley - Nevada

Expected plant size (phase 1) 25 MW net. Expected on-line date (phase 1) - 2018. Expected cost to build (phase 1) $130 M. Qualified for 30% investment tax credit. Status – first well completed with additional drilling in planning.

Dennis Gilles, CEO

Board Member U.S. Geothermal since 2011. Previous SVP of Calpine, prior experience at SCE/Mission and BP/ARCO. Engineer & MBA, 35 years energy management experience, 29 years in geothermal.

Doug Glaspey, President & COO

Co-founder of U.S. Geothermal, Engineer with 37 years in natural resource exploration, development and operation, including 13 years of geothermal experience.

Vs. Traditional Power Generation

Clean and renewable. No commodity risk and/or price volatility from fuel inputs. Negligible emissions. Easier permitting process in Western US. High availability versus all technologies. Qualifies for renewable incentives.

Vs. Wind & Solar

Geothermal provides base load power (24 hours/day). Wind - 34% installed capacity*

(8.2 hours/day) and Solar - 25% installed capacity* (6.0 hours/day). Efficient use of transmission. Smaller footprint/reduced visual impact. Minimal impact to wildlife. Geothermal does have: longer development lead times; higher exploration risk/cost.

* Source = U.S. Energy Information Agency