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| > Short Bios of Senior Team Members | > Dr. John E. Ehrenberg |
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| Dr. John E. Ehrenberg, President, has been a Senior Hydroacoustic Engineer for HTI since 1990. He received a SM in Electrical Engineering from Massachusetts Institute of Technology (1968), a PhD from the University of Washington (1973), and a BS in Electrical Engineering in 1966 from Seattle University. Dr. Ehrenberg has nearly 30 years experience in fisheries acoustics. From 1979 to 1983 he was a research engineer at the University of Washington Applied Physics Laboratory. From 1983 to 1986 he was Vice-President of Hydroacoustics at BioSonics, Inc. For HTI, Dr. Ehrenberg conducts equipment and software design and implementation, and advises on consulting projects. He has authored nearly 30 publications and technical reports on fisheries acoustics, and has taught short courses on fisheries acoustics for 20 years. |
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| Bruce H. Ransom, Senior Fisheries Biologist has 29 years of fisheries experience, 25 years of fisheries research experience, 20 years of that at HTI. As Vice President and Program Manager for HTI, he is responsible for acoustic tag and hydroacoustic evaluations of fish distributions and migrational characteristics at hydropower dams, in rivers, in lakes, and at sea worldwide. The majority of his career has been spent managing and conducting hydroacoustic studies of fish passage at hydropower dams, including evaluations required for Federal Energy Regulatory Commission relicensing of hydropower projects, and studies of methods of safely bypassing fish past turbine units. Other studies include evaluations of adult salmon escapement, and marine fisheries stock assessments. Mr. Ransom also oversees management of development and manufacturing of research grade acoustic tag and hydroacoustic equipment. He received a BA in English (1973) and BS in Fisheries (1979) from the University of Washington. He has authored over 100 publications and technical reports on fisheries acoustics, and has taught short courses on acoustic tag and hydroacoustic fisheries techniques for over 20 years. |
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| Tracey W. Steig, Technical Advisor, has been a Senior Hydroacoustic Engineer at HTI since 1988. Mr. Steig has 25 years experience conducting and managing hydroacoustic and acoustic tag evaluations at Columbia River hydropower dams, in open rivers, and in lakes and reservoirs worldwide. He has conducted hydroacoustic or acoustic tag studies at Rocky Reach and/or Rock Island dams for Chelan Co. PUD nearly annually since 1982. He received a BS (1978) and MS (1980) in Civil Engineering from the University of Washington. From 1978 to 1981 he was a research engineer at the University of Washington. Mr. Steig was a Senior Scientist at BioSonics, Inc. from 1982 to 1988, managing numerous domestic and international hydroacoustic projects using both fixed-location and mobile survey techniques. He has authored over 100 publications and technical reports on fisheries acoustics, and has taught acoustic tag and fisheries acoustics short courses for 20 years. | |
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| Samuel V. Johnston, Project Manager, has been a Senior Fisheries Biologist with HTI since 1989, and has 25 years of experience in fisheries acoustics. He manages evaluations of migratory fish in rivers, mobile surveys in lakes, hydropower relicensing projects, and co-directs software development. After receiving a BS in Fisheries from Humboldt State University (1980), he served as fisheries biologist with Oregon Dept. of Fish and Wildlife and California Dept. of Fish and Game from 1980 to 1982. Mr. Johnston was a Senior Scientist with BioSonics, Inc. from 1982 to 1989, where he managed numerous hydroacoustic fisheries studies. At HTI Mr. Johnston serves as Project Manager for acoustic tag and hydroacoustic evaluations of smolt entrainment at dams on the Columbia River, and hydroacoustically counts fish in open rivers in Alaska and California. He has over 25 years of experience collecting and analyzing hydroacoustic and acoustic tag data on salmonid migrants at dams on the Columbia and Snake rivers. Mr. Johnston has authored over 50 publications and technical reports on fisheries acoustics, and has taught short courses on fisheries acoustics for 20 years. | |
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| Patrick A. Nealson, Director of Consulting, has been a Senior Fisheries Biologist at HTI since 1992. Mr. Nealson has 25 years experience managing hydroacoustic and acoustic tag evaluations of fish entrainment, distribution, and behavior in a wide range of environments in North America and Europe. Included are over 50 studies at hydropower dams, including long-term studies related to Federal Energy Regulatory Commission (FERC) relicensing. Riverine experience includes hydroacoustic evaluations of migratory fish in North America, South America, and Europe. He also conducts mobile surveys of fish populations in lakes and marine environments in North America and Asia using multi-beam target tracking and echo integration. Mr. Nealson has a BS in Fisheries from the University of Washington (1981), and a MS Degree in Fisheries from there. He has authored over 80 publications and technical reports for studies using acoustic tags and hydroacoustics, and has taught short courses on fisheries acoustics for over 20 years. | ||||||
Corey D. Wright, Project Manager, has been working on fisheries telemetry projects in the Columbia River Basin since 2003. While at HTI he has been working on large scale acoustic tag fisheries evaluations working with Grant County Public Utility District at Wanapum and Priest Rapids Dams on the Mid-Columbia. Corey says he “finds true satisfaction performing research which aids in the improvement natural resource management”. Prior to 2006 he worked with the USGS Columbia River Research Laboratory and also with the US Fish and Wildlife Service. In 2001 he received a BS in Biology and Environmental Analysis from Warren Wilson College in Asheville, NC. |
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| Kevin K. Kumagai, Assistant Project Leader, began at HTI in 1993 as a Fisheries Biologist. He conducts acoustic tag and hydroacoustic evaluations for HTI at Columbia River hydropower dams and elsewhere. Mr. Kumagai has over 10 years experience conducting fisheries evaluations with hydroacoustic and acoustic tag techniques worldwide in open rivers, at hydropower dams, and in lakes and reservoirs. He has conducted acoustic tag or hydroacoustic studies at Wanapum, Priest Rapids, Rocky Reach, and Rock Island dams, and others. Mr. Kumagai received a BS in Wildlife and Fisheries Biology from the University of California, Davis (1987). From 1986 to 1993 he worked for the University of Washington, University of California, Parametrix, Inc, and other organizations. He has authored over 20 technical reports on projects using acoustic tag and hydroacoustic techniques, and teaches short courses on fisheries acoustics. | ||||||
Leah S. Sullivan, Project Manager, began at HTI in 2005 as a Fisheries Biologist. She conducts acoustic tag evaluations for HTI at Columbia River hydropower dams. Ms. Sullivan has over 6 years of experience conducting acoustic tag fisheries evaluations at hydropower dams in the Pacific Northwest, East Coast, and in New Zealand. She received an MS in Fisheries Conservation from the University of Massachusetts Amherst in 2005 and a BS in Marine and Freshwater Biology from the University of New Hampshire in 1997. From 2000 to 2005 she was a fisheries biologist with the US Geological Survey, and worked on various fisheries projects from 1997 to 2000, including as a biological aide with New Hampshire Fish & Game Department in 1997 and 1998. |
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| Brian D. McFadden, Scientist, has been a Fisheries Biologist applying hydroacoustic techniques since 1985. He conducts hydroacoustic evaluations at Columbia River hydropower dams and elsewhere, and has 22 years experience conducting data collection and analysis for open river, hydropower dam, and lake and reservoir projects. He has authored several technical reports on fisheries acoustics. He received a BS in Zoology from the University of Alberta (1981) and MS in Natural Resources Fisheries from Humboldt State University (1987). Mr. McFadden was a Fisheries Biologist at BioSonics, Inc. from 1987 to 2004, conducting numerous hydroacoustic projects using fixed-location techniques. Since 2005 he has been a Fisheries Biologist with HTI. | ||||||
| Mark A. Timko, Project Manager, has been a Fisheries Biologist with HTI since 1999. He conducts hydroacoustic and acoustic tag evaluations at Columbia River Basin hydropower dams and elsewhere in the Pacific Northwest and worldwide. In addition to Upper Baker Dam (2001), he has conducted or assisted clients with acoustic tag studies at Rocky Reach Dam, Rock Island Dam, North Fork Dam, Mayfield Dam, Upper Baker Dam, Swift Dam, Pinopolis Locks (S. Carolina), and others. From 1992 to 1999 he held fisheries Biologist positions with the Oceanic Institute (Hawaii), USAID, University of Alaska, PT Freeport, and King County, Washington. He received a BS in Marine Science from Hawaii Pacific University (1992), and a MS in Fisheries from the University of Alaska (1998). He has authored several publications and technical reports on studies using acoustic tag and hydroacoustic techniques, and teaches short courses on fisheries acoustics. | ||||||
| Anthony L. (Tony) Johnson P.E., Chief Engineer, has been with HTI since 2000. He manages the design, development, and testing of HTI hydroacoustic and acoustic tag systems, and assists with deployment and testing for evaluations at Columbia River hydropower dams and elsewhere. He received a BS (1982) and MS (1998) in Electrical Engineering from the University of Washington. | ||||||
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