Question: David Lee DeHarport was a photographer and anthropologist primarily known for his photographic work in Colorado's eastern plains region and his archaeological survey work of which location in northeastern Arizona, it is within the boundaries of the Navajo Nation and lies in the Four Corners region, and was established on April 1, 1931 as a unit of the National Park Service?

Context articles: Beautiful Mountain
Navajo music
Jack Boucher
David DeHarport
Window Rock, Arizona
Four Corners Monument
1993 Four Corners hantavirus outbreak
Four Corners
Canyon de Chelly National Monument
Grand Canyon Escalade

Beautiful Mountain (Navajo: Dziłkʼi Hózhóonii ) is part of the Chuska Mountains and its summit is the highest point in San Juan County, New Mexico.
 The mountain is about 26 mi southwest of the community of Shiprock in the Four Corners region.
 It is on the Navajo Nation and plays a significant role in Navajo mythology.
Navajo music is music made by Navajos, mostly hailing from the Four Corners region of the Southwestern United States and the territory of the Navajo Nation.
 While it traditionally takes the shape of ceremonial chants and echoes themes found in Diné Bahaneʼ, contemporary Navajo music includes a wide range of genres, ranging from country music to rock and rap, performed in both English and Navajo.
Jack E. Boucher (September 4, 1931 – September 2, 2012) was an American photographer for the National Park Service for more than 40 years beginning in 1958.
 He served as the Chief Photographer for the Historic American Buildings Survey (HABS).
 In 1966 he left the Park Service for two years to supervise New Jersey's State Historic Preservation program, including the State's roadside marker program, 18 historic museum houses, several lighthouses, and two historic villages.
 Offered his old job back by the Park Service/HABS in 1970, he left New Jersey to return to NPS/HABS and the highly specialized job of large format photographic architectural documentation.
 His work took him to 49 States, the Virgin Islands and Puerto Rico.
 April 2008 was the fiftieth anniversary of his employment with the National Park Service's "HABS" program.
 He traveled with 900 pounds of photographic equipment.
David Lee DeHarport was a photographer and anthropologist primarily known for his photographic work in Colorado's eastern plains region and his archaeological survey work of Arizona's Canyon de Chelly National Monument.
 Born on August 8, 1921, David DeHarport was raised in Denver, Colorado.
 He attended the University of Denver and studied photography and anthropology.
 After earning his B.A. in 1943, DeHarport
Window Rock (Navajo: ) is a small city that serves as the seat of government and capital of the Navajo Nation, the largest territory of a sovereign Native American nation in North America.
 It lies within the boundaries of the St. Michaels Chapter, adjacent to the Arizona and New Mexico state line.
 Window Rock hosts the Navajo Nation governmental campus which contains the Navajo Nation Council, Navajo Nation Supreme Court, the offices of the Navajo Nation President and Vice President, and many Navajo government buildings.
The Four Corners Monument marks the quadripoint in the Southwestern United States where the states of Arizona, Colorado, New Mexico, and Utah meet.
 It is the only point in the United States shared by four states, leading to the area being named the Four Corners region.
 The monument also marks the boundary between two semi-autonomous Native American governments, the Navajo Nation, which maintains the monument as a tourist attraction, and the Ute Mountain Ute Tribe Reservation.
The 1993 Four Corners hantavirus outbreak refers to the first ever known human cases of hantavirus in the United States.
 It occurred within the Four Corners region of the southwestern part of the country.
 This region is the geographic intersection where the corners of Utah, Colorado, New Mexico, and Arizona meet.
 The region is home to the Hopi, Ute, Zuni, and Navajo Nation Indian Reservations.
The Four Corners is a region of the United States consisting of the southwestern corner of Colorado, southeastern corner of Utah, northeastern corner of Arizona, and northwestern corner of New Mexico.
 The Four Corners area is named after the quadripoint at the intersection of approximately 37° north latitude with 109° 03' west longitude, where the boundaries of the four states meet, and are marked by the Four Corners Monument.
 It is the only location in the United States where four states meet.
 Most of the Four Corners region belongs to semi-autonomous Native American nations, the largest of which is the Navajo Nation, followed by Hopi, Ute, and Zuni tribal reserves and nations.
 The Four Corners region is part of a larger region known as the Colorado Plateau and is mostly rural, rugged, and arid.
 In addition to the monument, commonly visited areas within Four Corners include Monument Valley, Mesa Verde National Park, Chaco Canyon, and Canyon de Chelly National Monument.
 The most populous city in the Four Corners region is Farmington, New Mexico, followed by Durango, Colorado.
Canyon de Chelly National Monument ( ) was established on April 1, 1931 as a unit of the National Park Service.
 Located in northeastern Arizona, it is within the boundaries of the Navajo Nation and lies in the Four Corners region.
 Reflecting one of the longest continuously inhabited landscapes of North America, it preserves ruins of the indigenous tribes that lived in the area, from the Ancestral Puebloans (formerly known as Anasazi) to the Navajo.
 The monument covers 83840 acre and encompasses the floors and rims of the three major canyons: de Chelly, del Muerto, and Monument.
 These canyons were cut by streams with headwaters in the Chuska mountains just to the east of the monument.
 None of the land is federally owned.
 Canyon de Chelly is one of the most visited national monuments in the United States.
The Grand Canyon Escalade is a proposed entertainment complex on the eastern rim of the Grand Canyon within the boundaries of the Navajo Nation.
 Located to the north of the confluence of the Colorado River and the Little Colorado River, the project has been touted by Scottsdale based developers as a way to bring money to the tribe.
 However, this has not been without controversy, as there has been significant opposition from those who want to preserve the area.
 Strong opposition has also come from members of the Navajo Nation who live in the surrounding region and have cited numerous ecological, economic, and spiritual concerns with the proposal, as well as ethical concerns with the background of the developers.
 The Hopi have also expressed complete opposition to the project, citing the sacredness of the area surrounding Little Colorado River confluence.
 As of 2017, development of the project has been stalled and appears to be in a state of uncertainty, as the proposal has been rejected by three of the four key governing committees of the Navajo Nation, and continues to face opposition from Navajo Nation President Russell Begaye and other tribal leaders.