Tradition holds that 4 days after the arrival, 28 July 1847, Brigham Young walked to a section of land located between two creeks in the heart of the valley while in the company of Heber C. Kimball, Willard Richards, Orson Pratt, Wilford Woodruff, and many others. Brigham placed his cane into the ground,[1]Susa Young Gates, The Life Story of Brigham Young. New York, 1931. then, waving his hand around him said

“Here is the forty acres for the temple. The city can be laid out perfectly square north and south east and west.”

The motion was then made and carried to set aside 40 acres for the building of the temple, and the motion accepted.[2]Wallace Alan Raynor, “History of the Construction of the Salt Lake Temple” ScholarsArchive.BYU.edu, August 1961. Accessed 23 September 2017

ANNOUNCED ORDER
1

Date1847 06 28
ByBrigham Young
RolePresident

⮜Preceded by Nauvoo
Followed by St. George Utah

Wilford Woodruff drove a wooden stake into the hole left by Brigham Young’s cane to mark the location of the temple.[3]Wallace Alan Raynor, “History of the Construction of the Salt Lake Temple” ScholarsArchive.BYU.edu, August 1961. Accessed 23 September 2017 Days later, as the city was being planned, and after much discussion, the decision was made to reduce the number of acres to 10, as it was felt 40 was unnecessary.[4] Edward W. Tullidge, “History of Salt Lake City,” Salt Lake City, Utah 1886, p. 47-48.[5]Anthon H. Lund Journal, July 5, 1901, cited by BYU Prof. D. Michael Quinn https://byustudies.byu.edu/content/latter-day-saint-prayer-circles

References

References
1 Susa Young Gates, The Life Story of Brigham Young. New York, 1931.
2 Wallace Alan Raynor, “History of the Construction of the Salt Lake Temple” ScholarsArchive.BYU.edu, August 1961. Accessed 23 September 2017
3 Wallace Alan Raynor, “History of the Construction of the Salt Lake Temple” ScholarsArchive.BYU.edu, August 1961. Accessed 23 September 2017
4 Edward W. Tullidge, “History of Salt Lake City,” Salt Lake City, Utah 1886, p. 47-48.
5 Anthon H. Lund Journal, July 5, 1901, cited by BYU Prof. D. Michael Quinn https://byustudies.byu.edu/content/latter-day-saint-prayer-circles