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.
Trustees Open 42-Day Public Comment Period on Draft Assessment Plan for Injured Natural Resources in Upper Columbia River, Washington
Last edited 2/14/2017
Marcus Flats, shown here, at river mile 705 on the Columbia River in Washington, marks the transition zone from a predominately higher velocity riverine system to a lower velocity reservoir system, influencing the deposition and distribution of contaminated sediments in the Upper Columbia River. Photo credit: EPA.
On August 8, 2012, the federal, State and tribal natural resource trustees opened a 42-day public comment period on the draft “Injury Assessment Plan for the Upper Columbia River Site, Washington.” This Draft Injury Assessment Plan describes the trustees’ proposed approach for assessing potential injury to natural resources exposed to hazardous substances released to the Upper Columbia River system.
The Upper Columbia River Site is entirely within the State of Washington and includes Lake Roosevelt and the Columbia River south of the Canada/United States border downstream to the Grand Coulee Dam and the associated wetland, riparian, floodplain, upland terrestrial and lacustrine habitats affected by historic industrial operations. Lake Roosevelt, a 133-mile long reservoir with over 600 miles of shoreline, was created following the completion of the Grand Coulee Dam on the Columbia River in 1942.
The natural resource trustees in this case include:
Confederated Tribes of the Colville Reservation;
Spokane Tribe of Indians;
State of Washington, represented by Washington Department of Ecology; and,
U.S. Department of the Interior, represented by Bureau of Indian Affairs, Bureau of Land Management, Bureau of Reclamation, National Park Service and U.S. Fish and Wildlife Service.
Industrial activities along the River -- including smelting, fertilizer production, pulp mills and mining and milling in Canada and the United States -- have released hazardous substances to the Upper Columbia River through spills, effluent discharges and slag disposal. A provisional list of these hazardous substances, based on historical data, includes: arsenic, cadmium, copper, chromium, lead, mercury, zinc, PAHs, PCBs, dioxins, dibenzofurans, pesticides and other contaminants.
This Draft Injury Assessment Plan describes the proposed studies and other analytic steps needed to determine the nature and extent of natural resource injuries within the Upper Columbia River Site. The trustees anticipate preparing specific sampling and analysis plans which will be made public as either appendices or supplements to the Assessment Plan.
Written comment on the Draft Injury Assessment Plan must be received by the Bureau of Land Management in Spokane, Washington, by September 20, 2012.