Question: In what year was the national park in which Fan and Mortar Geysers are located signed into law?

Yellowstone National Park is a national park located in the U.S. states of Wyoming, Montana, and Idaho.  Yellowstone was the first National Park in the U.S. and is also widely held to be the first national park in the world.  The park is known for its wildlife and its many geothermal features, especially Old Faithful geyser, one of its most popular features.  It has many types of ecosystems, but the subalpine forest is the most abundant.  It was established by the U.S. Congress and signed into law by President Ulysses S. Grant on March 1, 1872.  It is part of the South Central Rockies forests ecoregion. <SEP> The United States Park Police (USPP) is one of the oldest uniformed federal law enforcement agencies in the United States.  It functions as a full-service law enforcement agency with responsibilities and jurisdiction in those National Park Service areas primarily located in the Washington, D.C., San Francisco, and New York City areas and certain other government lands.  The United States Park Police is one of the few full-service police departments in the federal government that possess both state and federal authority.  In addition to performing the normal crime prevention, investigation, and apprehension functions of an urban police force, the Park Police are responsible for policing many of the famous monuments in the United States.  The USPP shares law enforcement jurisdiction in all lands administered by the National Park Service with a force of National Park Service Rangers tasked with the same law enforcement powers and responsibilities.  The agency also provides protection for the President, Secretary of the Interior, and visiting dignitaries.  The Park Police is a unit of the National Park Service, which is a bureau of the Department of the Interior. <SEP> The establishment of Grand Teton National Park took place over a period spanning more than 50 years.  Located in the northwestern region of the U.S. state of Wyoming, Grand Teton National Park is 10 mi south of Yellowstone National Park which was established in 1872, when Wyoming, Idaho and Montana were still territories and the region was very sparsely settled.  By the late 19th century, conservationists were working to provide further protection to surrounding regions, leading President Grover Cleveland to create the Teton Forest Reserve, which included a portion of northern Jackson Hole.  By 1902, the reserve had been combined into the Yellowstone Forest Reserve, then was divided again in 1908 by President Theodore Roosevelt, establishing the Teton National Forest, which protected most of the Teton Range.  By 1907, the U.S. Bureau of Reclamation had constructed a temporary dam at the Snake River outlet of Jackson Lake.  This dam failed in 1910 and a new concrete Jackson Lake Dam replaced it by 1911.  The dam was further enlarged in 1916, raising lake waters 39 ft as part of the Minidoka Project, designed to provide irrigation for agriculture in the state of Idaho.  Though efforts to protect the Teton Range and Jackson Hole as part of an expanded Yellowstone National Park dated back to the late 19th century, proposals to construct more dams on some of the other lakes in Jackson Hole led Yellowstone National Park superintendent Horace Albright to block such efforts.  Albright was originally an advocate of the expanded Yellowstone plan which was very unpopular with local residents.  By the mid-1920s local sentiment had changed as a result of proposals for a new national park including only the Teton Range and six lakes at the base of the range.  With the general agreement of prominent Jackson Hole residents to this plan, President Calvin Coolidge signed the executive order establishing the 96000 acre Grand Teton National Park on February 26, 1929. <SEP>  For the past several decades, they have erupted in concert with one another and are generally talked about together.  The records detailing these geysers' known eruptive history shows that they have been infrequent and irregular performers. Fan and Mortar Geysers are two geysers in the Upper Geyser Basin in Yellowstone National Park.