Mercury's surface in "enhanced color," a color scheme created to emphasize color differences. This is not what Mercury would look like to the human eye, but by applying mathematical analysis to images, color differences can be accentuated beyond those visible to a person.
Mount Rushmore National Memorial under construction.
The workers had to endure conditions that varied from blazing hot to bitterly cold and windy. Each day they climbed 700 stairs to the top of the mountain to punch-in on the time clock. Then 3/8 inch thick steel cables lowered them over the front of the 500-foot face of the mountain in a "bosun chair." Despite the dangers, no one was killed during the project.
Otters in Glacier Bay National Park and Preserve, Alaska.
The sea otter population of Glacier Bay has increased dramatically in the past 20 years. Ecologists consider sea otters a keystone species here. Otters consume vast quantities of clams, urchins, crabs, and other invertebrates and their presence creates ripples through the ecosystem. NPS photo.
Every day someone like you becomes a wildland wildfire fighter, a teacher, a trail-builder, a museum curator, or a park ranger. Discover your opportunities in national parks. Come to play. Come to learn. Come to serve. Develop your environmental leadership skills. Find a job. Be the next generation to preserve and protect these great places.
With more than 80% of Americans living in urban areas, urban parks are more important than ever. The father of American landscape architecture, Frederick Law Olmsted, said of urban parks:
It is one great purpose of the Park to supply to the hundreds of thousands of tired workers, who have no opportunity to spend their summers in the country, a specimen of God's handiwork that shall be to them, inexpensively, what a month or two in the White Mountains or the Adirondacks is, at great cost, to those in easier circumstances.
Secretary Salazar Approves Ninth Commercial-Scale Solar Energy Project on Western Public Lands
Office of the Secretary
110 megawatt plant in Nevada will create 450 jobs
Last edited 4/25/2016
WASHINGTON, DC – Secretary of the Interior Ken Salazar today approved the Crescent Dunes Solar Energy Project, the ninth large-scale solar facility green-lighted as part of the administration's initiative to encourage rapid and responsible development of renewable energy on U.S. public lands. The concentrated solar power plant will produce 110 megawatts, enough to provide electricity for up to 75,000 Nevada households, and generate about 450-500 new jobs during construction and up to 50 permanent operations and maintenance jobs.
“Crescent Dunes joins a host of renewable energy projects on public lands in the West that are opening a new chapter on how our nation is powered,” Salazar said in signing the Record of Decision. “Using American ingenuity, we are creating jobs, stimulating local economies and spurring a sustainable, clean energy industrial base that will strengthen our nation's energy security.”
The project, proposed by SolarReserve's Tonopah Solar Energy, LLC of Santa Monica, California, is sited on approximately 2,250 acres administered by the Bureau of Land Management (BLM) about 13 miles northwest of Tonopah in Nye County, Nevada. In recent months, the BLM has approved six renewable energy projects on public lands in Nevada—three solar, two geothermal and one wind—as well as a long-distance transmission line that will facilitate the delivery of a variety of energy sources, including renewable energy, to consumers across the western United States.”
“These energy projects exemplify the collaborative partnerships we have developed to help achieve our common goals to protect our natural environment while utilizing America's wealth of renewable energy resources,” said BLM Director Bob Abbey. “I want to thank all of our partners in the development of the Crescent Dunes Environmental Impact Statement and especially recognize the contributions of Nellis Air Force Base and the Air Force Scientific Advisory Board, which analyzed several proposed project sites. By working together we were able to identify the optimal location for the facility and minimize operational impacts to Nellis and the Air Force's testing mission.”
The BLM worked closely with state, federal and military agencies to advance an environmentally appropriate project, including the Environmental Protection Agency, the U.S. Fish and Wildlife Service, the Nevada Department of Wildlife and the U.S. Air Force, as well as members of the environmental and conservation community. To minimize impacts to biological resources, the BLM selected an alternative plan that reduced the project size from 7,680 acres to 2,250 acres, with a development footprint of 1,776 acres. Following extensive public environmental review, the BLM published the Notice of Availability for the final environmental impact statement on November 26, 2010.
Through the American Recovery and Reinvestment Act, Tonopah Solar Energy, LLC can qualify for grants in lieu of tax credits – up to 30 percent of the project's eligible costs – as well as Department of Energy loan guarantees to assist with the construction of the facility. The developer has acquired a power purchase agreement with NV Energy; electricity produced at the facility will interconnect to NV Energy's grid through a transmission line to be built from the site to the existing Anaconda Moly Substation, about six miles north of the site.
The plant will use concentrated solar thermal “power tower” technology to contribute 485,000 megawatt hours of cost-effective renewable energy annually to the Nevada grid. This innovative technology uses mirror fields to focus solar energy on a tower receiver near the center of the array. Steam from boilers in the tower drives a turbine, which generates electricity for the transmission grid.
Crescent Dunes will also have thermal energy storage capability which will help during the state's peak electricity demand periods, including evenings in summer, when solar projects without storage can no longer generate solar energy. The State of Nevada is working to achieve a 25 percent Renewable Portfolio Standard by 2015.
Today's announcement is part of an historic Administration-wide effort to advance a renewable energy economy. In 2010, the Department of the Interior has approved nine large-scale solar energy projects – the first to be built on U.S. public lands in California and Nevada – that, cumulatively, will generate more than 3,600 megawatts, power more than 1 million homes and generate more than 7,000 jobs.
A fact sheet on the proposed Crescent Dunes Solar Energy Project is available HERE.