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

(b) Approved maps. The 14 United States Geological Survey (USGS) 1:24,000 scale topographic maps used to determine the boundary of the West Sonoma Coast viticultural area are titled:

(1) McGuire Ridge, California, 1991 (provisional edition);

(2) Stewarts Point, California, 1978;

(3) Annapolis, California, 1977;

(4) Tombs Creek, California, 1978;

(5) Fort Ross, California, 1998;

(6) Cazadero, California, 1998;

(7) Duncans Mills, California, 1979;

(8) Camp Meeker, California, 1995;

(9) Valley Ford, California, 1954; photorevised 1971;

(10) Two Rock, California, 1954; photorevised 1971;

(11) Bodega Head, California, 1972;

(12) Arched Rock, California, 1977;

(13) Plantation, California, 1977; and

(14) Gualala, California, 1998.

(c) Boundary. The West Sonoma Coast viticultural area is located in Sonoma County, California. The boundary of the West Sonoma Coast viticultural area is as described as follows:

(1) The beginning point is on the McGuire Ridge map at the intersection of the Sonoma County/Mendocino County boundary and the northwest corner of section 29, T11N/R14W. From the beginning point, proceed southeast in a straight line for 0.4 mile to an unnamed hilltop with a marked elevation of 820 feet in section 29, T11N/R14W; then

(2) Proceed southeast in a straight line for 1.4 miles to the intersection of the eastern boundary of section 32 and the 800-foot elevation contour, T11N/R14W; then

(3) Proceed southeast along the 800-foot elevation contour for 3.1 miles, crossing onto the Stewarts Point map, to its intersection with the northern boundary of section 3, T10N/R14W; then

(4) Proceed east along the northern boundary of section 3 and then along the northern boundary of section 2 for a total of 0.8 mile to the intersection of the northern boundary of section 2 and the 600-foot elevation contour, T10N, R14W; then

(5) Proceed generally southeast along the 600-foot elevation contour for 3.3 miles, crossing onto the Annapolis map, to its intersection with the northern boundary of section 12, T10N/R14W; then

(6) Proceed east along the northern boundary of section 12, T10N/R14W, for 0.1 mile to its intersection with the 600-foot elevation contour; then

(7) Proceed north then generally east along the meandering 600-foot elevation contour for 4.8 miles to its sixth intersection with the northern boundary of section 7, T10N/R13W; then

(8) Continue northeasterly along the 600-ft elevation contour for an additional 3 miles to its intersection with Springs Creek in section 5, T10N/R13W; then

(9) Proceed southeasterly along Springs Creek for 1 mile to its intersection with the northern boundary of section 9, T10N/R13W; then

(10) Proceed east along the northern boundary of section 9 for 0.42 mile to its intersection with an unnamed, intermittent tributary of Grasshopper Creek; then

(11) Proceed southwest along the unnamed, intermittent tributary of Grasshopper Creek for 0.63 mile to its intersection with the main stem of Grasshopper Creek in section 9, T10N/R13W; then

(12) Proceed generally west along the main stem of Grasshopper Creek to its intersection with the eastern boundary of section 7, T10N/R13W; then

(13) Proceed south along the eastern boundary of section 7 for 0.17 mile; then

(14) Proceed in a straight line southeast for 1.6 miles to the intersection of the eastern boundary of section 17, T10N/R13W, and the 800-foot elevation contour; then

(15) Proceed southeast along the 800-foot elevation contour for 2.6 miles to its intersection with an unnamed, unimproved road near the 862-foot benchmark in section 21, T10N/R13W; then

(16) Proceed southeast in a straight line for 0.2 mile to the intersection of the 600-foot elevation contour and an intermittent stream in section 28, T10N/R13W; then

(17) Proceed south along the 600-foot elevation contour for 1.7 miles to its intersection with the eastern boundary of section 33, T10N/R13W; then

(18) Proceed southeast in a straight line for 0.5 mile to the intersection of an unnamed light-duty road known locally as Skaggs Springs Road and an unnamed, unimproved road near the Mendosoma Fire Station in section 34, T10N/R13W; then

(19) Proceed southeast along the unnamed, unimproved road for total of 5.9 miles as it follows Skyline Ridge and crosses onto the Tombs Creek map, back onto the Annapolis map, then back on to the Tombs Creek map, to the second intersection of the road with the 1,200-foot elevation contour in section 13, T9N/R13W; then

(20) Proceed southeast along the 1,200-foot elevation contour for 0.6 mile to the intersection with Allen Creek in section 18, T9N/R12W; then

(21) Proceed north along Allen Creek for 0.2 mile to the intersection with the 920-foot elevation contour in section 18, T9N/R12W; then

(22) Proceed east and then southeast along the meandering 920-foot elevation contour, crossing onto the Fort Ross map, then onto the Tombs Creek map, and then back onto the Fort Ross map, to the intersection of the elevation contour with Jim Creek in section 21, T9N/R12W; then

(23) Proceed southeast along Jim Creek for 0.7 mile to the intersection of the creek with the northern boundary of section 27, T9N, R12W; then

(24) Proceed east along the northern boundary of section 27 for 0.5 mile to the northeast corner of section 27; then

(25) Proceed south along the eastern boundaries of sections 27, 34, 3, 10, 15, and 22 for 5.1 miles to the intersection of the eastern boundary of section 22 and Fort Ross Road, T9N/R12W; then

(26) Proceed east along Fort Ross Road for approximately 262 feet to the intersection of the road with the middle branch of Russian Gulch Creek in section 23, T8N/R12W; then

(27) Proceed south along the middle branch of Russian Gulch Creek for 1.2 miles to the intersection with the 920-foot elevation contour in section 26, T8N/R12W; then

(28) Proceed southeast in a straight line for 2 miles, crossing onto the Cazadero map, to the summit of Pole Mountain in section 30, T8N/R11W; then

(29) Proceed southeast in a straight line for 4.7 miles, crossing onto the Duncans Mills map, to the confluence of Austin Creek and the Russian River, T7N/R11W; then

(30) Proceed generally east (upstream) along the Russian River for 3.1 miles to the intersection of the Russian River and the Bohemian Highway in section 7, T7N/R10W; then

(31) Proceed southeast along the Bohemian Highway for a total of 10.1 miles, crossing onto the Camp Meeker map and through the towns of Camp Meeker and Occidental, then crossing onto the Valley Ford map and through the town of Freestone, to the intersection of the Bohemian Highway and an unnamed medium-duty road known locally as Bodega Road near benchmark (BM) 214 in section 12, T6N/R10W; then

(32) Proceed northeast along Bodega Road for 0.9 mile, crossing onto the Camp Meeker map, to the intersection of the road with an unnamed light-duty road known locally as Barnett Valley Road north of the marked 486-foot elevation point in the Cañada de Jonive land grant, T6N/R10W; then

(33) Proceed south then east along Barnett Valley Road for 2.2 miles, crossing onto the Valley Ford map and then onto the Two Rock map, to the intersection of Bennett Valley Road with Burnside Road in section 17, T6N/R9W; then

(34) Proceed southeast along Burnside Road for 3.2 miles to its intersection with the 400-foot elevation contour just north of an unnamed light duty road known locally as Bloomfield Road in the Cañada de Pogolimi land grant, T5N/R9W; then

(35) Proceed west along the 400-foot elevation contour for 6.7 miles, crossing onto the Valley Ford map, to the intersection of the elevation contour with an unimproved road, Cañada de Pogolimi land grant, T6N/R9W; then

(36) Proceed northwest then southwest along the unnamed, unimproved road for 0.9 mile to its terminus, Cañada de Pogolimi land grant, T6N/R9W; then

(37) Proceed northwest in a straight line for 0.1 mile to the marked 448-foot summit of an unnamed hilltop, Cañada de Pogolimi land grant, T6N/R10W; then

(38) Proceed northwest in a straight line for 0.6 mile to the 61-foot benchmark along an unnamed secondary highway known locally as Freestone Valley Ford Road, Cañada de Pogolimi land grant, T6N/R10W; then

(39) Proceed west-northwest in a straight line for 0.8 mile to VABM 724 in the Estero Americano land grant, T6N/R10W; then

(40) Proceed west in a straight line for 1.0 mile to the intersection of Salmon Creek and an intermittent stream, Estero Americano land grant, T6N/R10W; then

(41) Proceed west (downstream) along Salmon Creek for 9.6 miles, crossing onto the Bodega Head map, to the mouth of the creek at the Pacific Ocean; then

(42) Proceed north along the Pacific coastline for 51.4 miles, crossing over the Duncan Mills, Arched Rock, Fort Ross, Plantation, and Stewarts Point maps and onto the Gualala map to the intersection of the coastline with the Sonoma County/Mendocino County line; then

(43) Proceed east along the Sonoma County/Mendocino County line for 5.6 miles, crossing onto the McGuire Ridge map, and returning to the beginning point, T11N, R14W.