Name. The name of the viticultural area described in this section is “Big Valley District-Lake County”. For purposes of part 4 of this chapter, “Big Valley District-Lake County” is a term of viticultural significance.

Approved maps. The four United States Geological Survey (USGS) 1:24,000 scale topographic maps used to determine the boundary of the Big Valley District-Lake County viticultural area are titled:

Lucerne, CA, 1996;

Kelseyville, CA, 1993;

Highland Springs, CA, 1993; and

Lakeport, CA, 1958; photorevised 1978; minor revision 1994.

Boundary. The Big Valley District-Lake County viticultural area is located in Lake County, California. The boundary of the Big Valley District-Lake County viticultural area is as described below:

The beginning point is on the Lucerne map at the point where Cole Creek flows into Clear Lake, section 36, T14N/R9W. From the beginning point, proceed southerly (upstream) along Cole Creek approximately 0.9 mile to the creek's intersection with Soda Bay Road, section 1, T13N/R9W; then

Proceed east on Soda Bay Road less than 0.1 mile to the road's intersection with the unnamed, light-duty road known locally as Clark Drive, section 1, T13N/R09W; then

Proceed southeast in a straight line less than 0.1 mile to the 1,400-foot elevation line, section 1, T13N/R9W; then

Proceed southerly along the 1,400-foot elevation line, crossing onto the Kelseyville map, to the line's intersection with a marked cemetery east of Kelseyville (in the northeast quadrant of section 14, T13N/R9W), and then continue along the 1,400-foot elevation line approximately 0.35 mile to the line's intersection with an unnamed, unimproved road which runs north from Konocti Road, section 13, T13N/R9W; then

Proceed south-southeast along the unnamed, unimproved road to the road's intersection with the improved portion of Konocti Road, section 13, T13N/R9W; then

Proceed west on Konocti Road approximately 0.9 mile to the road's intersection with an unnamed, light-duty road within Kelseyville known locally as Main Street, section 14, T13N/R9W; then

Proceed south-southeast on Main Street approximately 0.35 mile to its intersection with State Highway 29/175, section 14, T13N/R9W; then

Proceed west-northwest on State Highway 29/175 approximately 0.4 mile to the highway's intersection with Kelsey Creek, section 14, T13N/R9W; then

Proceed northwesterly (downstream) along Kelsey Creek approximately 0.5 mile to the creek's intersection with an unnamed, light-duty road known locally as Big Valley Road (or North Main Street), section 15, T13N/R9W; then

Proceed west and then northwest on Big Valley Road approximately 0.35 mile to the road's intersection with Merritt Road, southern boundary of section 10, T13N/R9W; then

Proceed west on Merritt Road approximately 0.3 mile to the road's intersection with the 1,400-foot elevation line, southern boundary of section 10, T13N/R9W; then

Proceed northwesterly along the 1,400-foot elevation line to the line's intersection with State Highway 29/175, section 9, T13N/R9W, and then continue southerly along the 1,400-foot elevation to the line's intersection with Merritt Road, southern boundary of section 9, T13N/R9W; then

Proceed west on Merritt Road approximately 0.1 mile to the road's intersection with Hill Creek, southern boundary of section 9, T13N/R9W; then

Proceed southerly (upstream) along Hill Creek approximately 0.9 mile to the creek's intersection with Bell Hill Road, section 16, T13N/R9W; then

Proceed west then southwest on Bell Hill Road approximately 0.15 mile, passing the intersection of Bell Hill Road and Hummel Lane, to Bell Hill Road's intersection with the 1,400-foot elevation line, section 16, T13N/R9W; then

Proceed westerly and then southwesterly along the meandering 1,400-foot elevation line, crossing onto the Highland Springs map, to the line's first intersection with Bell Hill Road in section 20, T13N/R9W; then

Proceed west on the meandering Bell Hill Road, crossing Adobe Creek, to the road's intersection with Highland Springs Road, section 30, T13N/R9W; then

Proceed north on Highland Springs Road approximately 2.8 miles to the road's intersection with Mathews Road at the northwest corner of section 8, T13N/R9W; then

Proceed west on Mathews Road approximately 0.7 mile to the road's intersection with an unnamed paved road known locally as Ackley Road, southern boundary of section 6, T13N/R9W; then

Proceed north on Ackley Road approximately 0.9 mile, crossing onto the Lakeport map, to the road's intersection with State Highway 29/175, section 6; T13N/R9W; then

Proceed due north-northeast in a straight line approximately 0.15 mile to the unnamed secondary highway known locally as Soda Bay Road, northern boundary of section 6, T13N/R9W; then

Proceed east on Soda Bay Road approximately 0.35 mile to the road's intersection with Manning Creek, northern boundary of section 6, T13N/R9W; then

Proceed northwesterly (downstream) along Manning Creek to the shore of Clear Lake, section 30, T14N/R9W; then

Proceed easterly along the meandering shore of Clear Lake, crossing onto the Lucerne map, to the beginning point.