ABOUT: PennWell's Hydro Group publishes Hydro Review and HRW-Hydro Review Worldwide. Hydro Review, the magazine of the North American hydro industry, offers practical, useful information, helpful examples, and constructive guidance from experts. Each issue has an average readership of more than 50,000. HRW's mission is to share practical, technical information and expertise on hydroelectric power to the international hydro community. The magazine has circulation of more than 10,000.
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