U.S. Geothermal Inc. Announces Successful Results

BOISE, Idaho, June 29, 2017 (GLOBE NEWSWIRE) -- U.S. Geothermal Inc. (the “Company”) (NYSE MKT:HTM), a leading and profitable renewable energy company focused on the development, production, and sale of electricity from geothermal energy, today announced that it has successfully intersected high temperature resource in the three additional wells drilled in the Southwest Zone of the resource area at its San Emidio II development project.

Drilling began on June 1st, 2017 and the three wells were deepened based on their high thermal gradient and bottom hole temperature.  Well 78-20 was drilled to 2,387 feet deep, intersected the geothermal resource at 2,314 feet, and has a measured flowing temperature of 324°F.  Well 18-21 was drilled to 2,177 feet deep, intersected the geothermal resource at 1,874 feet, and has a measured flowing temperature of 325°F.  The third well (28-21) was drilled to 2,799 feet deep, intersected the geothermal resource at 1,900 feet, and though less permeable than the other two, has a measured flowing temperature of 321°F.  For comparison purposes, the wellfield at our San Emidio I project is currently producing at an average temperature of 278°F.  All wells were completed with a 6 ¼ inch bottom hole diameter and a 4 ½ inch perforated casing liner.

The three newly completed wells extend the proven portion of the Southwest Zone approximately 1,000 feet further south and are expected to increase the P90 (90% probability) reservoir estimate of 18.7 net megawatts, announced in January, toward the 47 net megawatt P50 (50% probability) level.  This increased capacity is in addition to the 10 megawatts being produced by the San Emidio I plant from the Northwestern reservoir area.

A long-term flow test is in the planning stages. This test will provide more detailed information about the reservoir, so that an updated reservoir model can be developed to determine the maximum level of generation.  In addition, a Large Generator Interconnection agreement for 45 megawatts was filed with NV Energy on June 26 ^th for the San Emidio II project.

“We are very pleased to report the excellent drilling results at our San Emidio II project, that have exceeded our expectations in terms of temperature and generation potential,” said Dennis Gilles, Chief Executive Officer.  “Having the ability to add a larger power plant to our San Emidio complex will help reduce capital and operating costs, and give us a very cost competitive project.  Additionally, it will allow us to deploy the previously acquired power plants, whose acquisition we had announced in early 2016.”

About U.S. Geothermal Inc.: U.S. Geothermal Inc. is a leading and profitable renewable energy company focused on the development, production and sale of electricity from geothermal energy. The Company is currently operating geothermal power projects at Neal Hot Springs, Oregon, San Emidio, Nevada and Raft River, Idaho for a total power generation of approximately 45 MWs. The Company is also developing an additional estimated 115 MWs of projects at: the Geysers, California; a second phase project at San Emidio, Nevada; at Crescent Valley, Nevada; and the El Ceibillo project located near Guatemala City, Guatemala.  U.S. Geothermal’s growth goal is to reach over 200 MWs of generation by 2021 through a combination of internal development and strategic acquisitions.

Please visit our Website at: http://www.usgeothermal.com

The information provided in this news release may contain forward-looking statements within the definition of the Safe Harbor provisions of the US Private Securities Litigation Reform Act of 1995.  Readers are cautioned to review the risk factors identified by the company in its filings with United States Securities and Exchange Commission.  All statements, other than statements of historical fact, included herein, without limitation, statements relating to the future operating or financial performance, development schedules or estimated resources of U.S. Geothermal, are forward-looking statements. Forward-looking statements are frequently, but not always, identified by words such as "expects", "anticipates", "believes", "intends", "estimates", "potential", "possible", and similar expressions, or statements that events, conditions, or results "will", "may", "could", or "should" occur or be achieved. These forward-looking statements may include statements regarding perceived merit of properties; interpretation of the results of well tests; project development; resource megawatt capacity; capital expenditures; timelines; strategic plans; or other statements that are not statements of fact. Forward-looking statements involve various risks and uncertainties. There can be no assurance that such statements will prove to be accurate, and actual results and future events could differ materially from those anticipated in such statements. Important factors that could cause actual results to differ materially from U.S. Geothermal's expectations include the uncertainties involving the availability of financing in the debt and capital markets; uncertainties involved in the interpretation of results of well tests; the need for cooperation of government agencies in the development and operation of properties; the need to obtain permits and governmental approvals; risks of construction; unexpected cost increases, which could include significant increases in estimated capital and operating costs; and other risks and uncertainties disclosed in U.S. Geothermal's Annual Report on Form 10-K for the year ended December 31, 2016 filed with the United States Securities and Exchange Commission and Canadian securities regulatory authorities and in other U.S. Geothermal reports and documents filed with applicable securities regulatory authorities from time to time. Forward-looking statements are based on management’s expectations, beliefs and opinions on the date the statements are made.  U.S. Geothermal Inc. assumes no obligation to update forward-looking statements if management’s expectations, beliefs, or opinions, or other factors, should change.

The NYSE MKT does not accept responsibility for the adequacy of this release.

FOR ADDITIONAL INFORMATION PLEASE CONTACT: Scott Anderson – Director of Investor Relations and Corporate Communications U.S. Geothermal Inc. Tel: 208-424-1027 Fax: 208-424-1030 sanderson@usgeothermal.com