§ 9.116 Sonoma Coast. ( a ) *Name.* The name of the viticultural area described in this section is “Sonoma Coast”.
( b ) *Approved map.* The approved maps for determining the boundary of the Sonoma Coast viticultural area are the following six U.S.G.S. topographic maps: ( 1 ) Sonoma County, California, scale 1:100,000, dated 1970;
( 2 ) Mark West Springs, California, 7.5-minute series, dated 1958, photoinspected 1978;
( 3 ) Healdsburg, California, 7.5-minute series, dated 1955, photorevised 1980;
( 4 ) Jimtown, California, 7.5-minute series, dated 1955, photorevised 1975;
( 5 ) Guerneville, California, 7.5-minute series, dated 1955; and
( 6 ) Cazadero, California, 7.5-minute series, dated 1978.
( c ) *Boundary description.* In general, the boundary description of the Sonoma Coast viticultural area is found on the U.S.G.S. Topographic Map of Sonoma County, California, scale 1:100,000, dated 1970. When a point of the boundary description is found on one of the 7.5-minute quadrangles, the boundary description indicates this in parentheses. The boundary description is as follows: ( 1 ) The beginning point is the point at which the Sonoma County-Mendocino County line meets the shoreline of the Pacific Ocean.
( 2 ) The boundary follows the shoreline of the Pacific Ocean southerly to the Sonoma County-Marin County line.
( 3 ) The boundary follows the Sonoma County-Marin County line southeasterly to San Pablo Bay.
( 4 ) The boundary follows the shoreline of San Pablo Bay easterly to the Sonoma County-Napa County line.
( 5 ) The boundary follows the Sonoma County-Napa County line northerly to the peak of Arrowhead Mountain.
( 6 ) From the peak of Arrowhead Mountain, the boundary proceeds in a straight line westerly to the peak of Sonoma Mountain.
( 7 ) From the peak of Sonoma Mountain, the boundary proceeds in a straight line northwesterly to the peak of Taylor Mountain.
( 8 ) From the peak of Taylor Mountain, the boundary proceeds in a straight line northwesterly to the point, near the benchmark at 184 ft. elevation in Section 34, Township 8 North, Range 8 West, at which Mark West Road crosses an unnamed stream which flows northwesterly into Mark West Creek. (Mark West Springs map)
( 9 ) From this point, the boundary proceeds northerly in a straight line to the headwaters of Brooks Creek, in Section 4, Township 8 North, Range 8 West. (Mark West Springs map)
( 10 ) The boundary follows Brooks Creek northwesterly to its confluence with the Russian River. (Healdsburg map)
( 11 ) The boundary proceeds southwesterly in a straight line to an unidentified peak at elevation 672 ft. (Healdsburg map)
( 12 ) The boundary proceeds northwesterly in a straight line to the peak identified as Black Peak. (Healdsburg map)
( 13 ) The boundary proceeds westerly in a straight line to an unidentified peak at elevation 857 ft. (Healdsburg map)
( 14 ) The boundary proceeds westerly in a straight line to the peak of Fitch Mountain at elevation 991 ft. (Healdsburg map)
( 15 ) The boundary proceeds northwesterly in a straight line to the intersection, near a benchmark at elevation 154 ft. in the town of Chiquita, of a light-duty road (known locally as Chiquita Road) and a southbound primary highway, hard surface road (known locally as Healdsburg Avenue). (Jimtown map)
( 16 ) The boundary follows that road (known locally as Healdsburg Avenue) southerly through the city of Healdsburg to the point at which it is a light-duty, hard or improved surface road, identified on the map as Redwood Highway, which crosses the Russian River, immediately south of the city of Healdsburg at a bridge (known locally as the Healdsburg Avenue Bridge). (Healdsburg map)
( 17 ) The boundary follows the Russian River southerly to a point, near the confluence with Dry Creek, opposite a straight line extension of a light-duty, hard or improved surface road (known locally as Foreman Lane) located west of the Russian River. (Healdsburg map)
( 18 ) The boundary proceeds in a straight line to that road and follows it westerly, then south, then westerly, onto the Guerneville map, across a secondary highway, hard surface road (known locally as Westside Road), and continues westerly, then northwesterly to the point at which it crosses Felta Creek. (Guerneville map)
( 19 ) The boundary follows Felta Creek approximately 18,000 ft. westerly to its headwaters, at the confluence of three springs, located approximately 5,800 feet northwesterly of Wild Hog Hill. (Guerneville map)
( 20 ) The boundary proceeds in a straight line southwesterly to the southwest corner of Section 9, Township 8 North, Range 10 West. (Guerneville map)
( 21 ) The boundary proceeds in a straight line southwesterly to the point in, Section 24, Township 8 North, Range 11 West, at which Hulbert Creek crosses the 160 ft. contour line. (Cazadero map)
( 22 ) The boundary follows Hulbert Creek southerly to its confluence with the Russian River.
( 23 ) The boundary follows the Russian River southwesterly to its confluence with Austin Creek.
( 24 ) From this point, the boundary proceeds in a straight line northwesterly to the peak of Pole Mountain.
( 25 ) From the peak of Pole Mountain, the boundary proceeds in a straight line northwesterly to the peak of Big Oat Mountain.
( 26 ) From the peak of Big Oat Mountain, the boundary proceeds in a straight line northwesterly to the peak of Oak Mountain.
( 27 ) From the peak of Oak Mountain, the boundary proceeds in a straight line northwesterly approximately 14.5 miles to the Sonoma County-Mendocino County line at the northeast corner of Section 25, Township 11 North, Range 14 West.
( 28 ) The boundary follows the Sonoma County-Mendocino County line west, then southwesterly to the beginning point.
[T.D. ATF-253, 52 FR 22304, June 11, 1987]