(a) Name. The name of the viticultural area described in this section is “Alta Mesa”. For purposes of part 4 of this chapter, “Alta Mesa” is a term of viticultural significance.

(b) Approved maps. The seven United States Geological Survey, 1:24,000 scale, topographic quadrangle maps used to determine the boundary of the Alta Mesa viticultural area are titled—

(1) North Lodi, Calif., 1968, photorevised 1976;

(2) Galt, Calif., 1968, photorevised 1980;

(3) Florin, Calif., 1968, photorevised 1980;

(4) Elk Grove, Calif., 1968, photorevised 1979;

(5) Sloughhouse, Calif., 1968, photorevised 1980, minor revision 1993;

(6) Clay, Calif., 1968, photorevised 1980, minor revision 1993; and

(7) Lockeford, Calif., 1968, photorevised 1979, minor revision 1993.

(c) Boundary. The Alta Mesa viticultural area is located in Sacramento County, California, and is entirely within the Lodi viticultural area (27 CFR 9.107). The Alta Mesa viticultural area boundary is as follows:

(1) The beginning point is on the Lodi North map at the intersection of Kost Road and the Southern Pacific railway, section 34, T5N, R6E. From the beginning point, proceed north-northwest 8.7 miles along the Southern Pacific railway to its intersection with State Route 99 at McConnel, section 20, T6N, R6E (Galt Quadrangle); then

(2) Proceed northwest 4.7 miles on State Route 99 to its intersection with Sheldon Road at the northern boundary of section 26, T7N, R5E (Florin Quadrangle); then

(3) Proceed east 5.2 miles on Sheldon Road to its intersection with the Central California Traction railroad at the northern boundary of section 27, T7N, R6E (Elk Grove Quadrangle); then

(4) Proceed southeast 3.85 miles along the Central California Traction railroad to Grant Line Road, then southwest on Grant Line Road to Wilton Road at the hamlet of Sheldon, and then continue southeast on Wilton Road to its intersection with Dillard Road, section 6, T6N, R7E (Elk Grove Quadrangle); then

(5) Proceed northeast 2.6 miles on Dillard Road to its intersection with Lee Shorthorn Road, T7N, R7E (Sloughhouse Quadrangle); then

(6) Proceed southeast 0.9 mile on Lee Shorthorn Road to its intersection with Tavernor Road, T7N, R7E (Sloughhouse Quadrangle); then

(7) Proceed south 0.95 mile on Tavernor Road to its first 90 degree turn to the west (where two unimproved roads join Tavernor Road from the east and south), section 4, T6N, R7E (Sloughhouse Quadrangle); then

(8) Continue due south 1 mile in a straight line to the line's intersection with the 105-foot contour line and an unimproved extension of Blake Road, section 9, T6N, R7E (Sloughhouse Quadrangle); then

(9) Proceed west 0.3 mile on the unimproved extension of Blake Road to its intersection with Tavernor Road, section 9, T6N, R7E (Sloughhouse Quadrangle); then

(10) Proceed south 0.7 mile on Tavernor Road to the center of the loop at the end of the road, section 16, T6N, R7E (Sloughhouse Quadrangle); then

(11) Proceed southwest in a straight line for 0.1 mile to the line's intersection with the east end of the landing strip shown in the northwest quadrant of section 16, T6N, R7E (Sloughhouse Quadrangle); then

(12) Proceed west along the landing strip and a line extending from its western end to the line's intersection with Alta Mesa Road on the eastern boundary of section 17, T6N, R7E (Sloughhouse Quadrangle); then

(13) Proceed south 6.1 miles on Alta Mesa Road, crossing State Route 104, to Alta Mesa Road's intersection with Borden Road at the southwest corner of section 9, T5N, R7E (Clay Quadrangle); then

(14) Proceed east 1 mile on Borden Road to its intersection with Alabama Road at the southeast corner of section 9, T5N, R7E (Clay Quadrangle); then

(15) Proceed south 2 miles on Alabama Road to its intersection with Simmerhorn Road at the southeast corner of section 21, T5N, R7E (Clay Quadrangle); then

(16) Proceed east 2 miles on Simmerhorn Road to its intersection with Clay Station Road at the northeast corner of section 26, T5N, R7E (Clay Quadrangle); then

(17) Proceed south 0.5 mile on Clay Station Road to its intersection with Dry Creek, section 26, T5N, R7E (Clay Quadrangle); then

(18) Proceed west-southwest (downstream) 7.8 miles along Dry Creek, crossing over the northwest corner of the Lockeford map, and twice crossing over the southeast corner of the Galt map, to Dry Creek's intersection with Lincoln Way, section 35, T5N, R6E (Lodi North Quadrangle); then

(19) Proceed northwest 0.1 mile on Lincoln Way to its intersection with Kost Road, section 35, T5N, R6E (Lodi North Quadrangle); and

(20) Proceed west 0.3 mile on Kost Road, returning to the beginning point.