In furtherance of the purposes of sections 450y to 450y–4 of this title and to facilitate the administration and development of the Coronado National Memorial, Arizona, the boundaries thereof are revised by the following additions and deletions of land:

(1) Inclusion in the memorial and exclusion from the Coronado National Forest of lots 2 and 7 and a portion of Homestead Entry Survey 310 situated in section 18, township 24 south, range 21 east, Gila and Salt River base and meridian, said portion of Homestead Entry Survey 310 being more particularly described as follows: Beginning at the southwest corner (identified as corner number 1), of Homestead Entry Survey 310, said point being located on the present boundary of Coronado National Memorial and marked by an iron pipe with a brass cap and a rock cairn placed by the United States Bureau of Land Management in 1955; thence north zero degrees thirty-three minutes west, one thousand two hundred ninety-four and twenty-six hundredths feet, more or less, along the west boundary of said tract, which line is also the present boundary of said memorial, to the northeast corner of lot 8, section 18, said point being marked by an iron pipe with a brass cap and a rock cairn placed by the United States Bureau of Land Management in 1955; thence north zero degrees twenty-three minutes east, two hundred thirty and eight-tenths feet, more or less, along the west boundary of Homestead Entry Survey 310 to a point on a circular curve marked by an iron pipe with a National Park Service brass cap, said point being located south eighty-one degrees forty-four minutes east, exactly one hundred forty feet from the point of curvature of said curve; thence southeasterly five hundred forty-eight and two-tenths feet along said circular curve to the right of radius one thousand seven hundred thirty-two and four-tenths feet and having a beginning tangent bearing of south eighty-four degrees three minutes east (from point of curvature to point of intersection), to the point of tangency of said curve; thence south sixty-one degrees sixteen minutes east, two hundred twenty-four and eight-tenths feet to the point of curvature of a circular curve to the right; thence southeasterly two hundred ninety-two and six-tenths feet along said circular curve to the right of radius six thousand twenty-nine and six-tenths feet to the point of tangency of said curve; thence south fifty-eight degrees twenty-nine minutes east, five hundred eighty-eight and seven-tenths feet to the point of curvature of a circular curve to the right; thence southeasterly two hundred twenty-five and nine-tenths feet along said circular curve to the right of radius two thousand two hundred nine and nine-tenths feet to the point of tangency of said curve; thence south fifty-two degrees thirty-eight minutes east, twenty-eight and eight-tenths feet to the point of curvature of a circular curve to the left; thence southeasterly two hundred sixteen and nine-tenths feet along said circular curve to the left of radius one thousand six hundred nine and nine-tenths feet to the point of tangency of said curve; thence south sixty degrees twenty-one minutes east, thirty and seven-tenths feet to the point of curvature of a circular curve to the right; thence southeasterly seven hundred thirteen and six-tenths feet, more or less, along said circular curve to the right of radius one thousand two hundred fifty-four and nine-tenths feet to a point on the southern boundary line of Homestead Entry Survey 310 marked by an iron pipe with a National Park Service brass cap, said point also being located on the present northern boundary line of Coronado National Memorial; thence north eighty-nine degrees forty-nine minutes west two thousand three hundred and sixty-one feet, more or less, along the southern boundary line of Homestead Entry Survey 310, which line is also the present northern boundary of the said memorial, to the point of beginning (all bearings referred to the true meridian).

(2) Inclusion in the Memorial and exclusion from the Coronado National Forest of lots 5 and 6 in section 20, township 24 south, range 21 east, Gila and Salt River base and meridian.

(3) Exclusion from the Memorial and inclusion in the Coronado National Forest of the north half southwest quarter northwest quarter section 13, and the north half southeast quarter northeast quarter section 14, all in township 24 south, range 20 east, Gila and Salt River base and meridian.