January 2017 By John Twa, Mechanical Engineer The four lower Snake River locks and dams were completed in the 1960’s and 1970’s after congressional authorization to provide river navigation to eastern Washington and Lewiston, Idaho. Each of the four, 100 foot high dams created flatwater reservoirs with sufficient depth to allow freight traffic by barge. […]
By Tell The Dam Truth, Inc. The four Lower Snake River dams, reservoirs, and their hydropower systems (“LSR dams”) – Lower Granite, Little Goose, Lower Monumental, and Ice Harbor – in the state of Washington have been at the center of national controversy in recent months. Because the dams block the passage of native salmon, […]
March 2013 By EV Arntzen • S Niehus • BL Miller • M Richmond • AC O’Toole Inland water bodies, such as freshwater lakes, are known to be net emitters of carbon dioxide (CO2) and methane (CH4). In recent years, significant greenhouse gas (GHG) emissions from tropical, boreal, and mid-latitude reservoirs have also been reported. […]
July 2017 By Benjamin L. Miller ● Evan V. Arntzen ● Amy E. Goldman ● Marshall C. Richmond The United States is home to 2198 dams actively used for hydropower production. With the December 2015 consensus adoption of the United Nations Framework Convention on Climate Change Paris Agreement, it is important to accurately quantify anthropogenic […]
July 2020 By John Twa, Mechanical Engineer Scientists are increasingly studying and recognizing the significant amount of greenhouse gas (GHG) emissions from hydropower reservoirs. “[N]umerous studies have demonstrated that hydropower reservoirs have the potential to produce high amounts of [methane], despite initially being considered carbon-free energy sources”. In fact, ten percent of reservoirs have emission […]