Name. The name of the viticultural area described in this section is “Clarksburg.”

Approved maps. The appropriate maps for determining the boundaries of the Clarksburg viticultural area are eight U.S.G.S. topographic maps in the 7.5 minute series, as follows:

Sacramento West, Calif., 1967 (photorevised 1980).

Saxon, Calif., 1952 (photorevised 1968).

Clarksburg, Calif., 1967 (photorevised 1980).

Florin, Calif., 1968 (photorevised 1980).

Liberty Island, Calif., 1978.

Courtland, Calif., 1978.

Bruceville, Calif., 1978 (photorevised 1980).

Isleton, Calif., 1978.

Boundaries. Beginning at a point (on the Sacramento West topographic map) in Yolo County in T8N/R4E, at the intersection of Jefferson Blvd. and Burrows Ave.,

Then southwest in a straight line 1.2 miles along Jefferson Blvd. to the eastern bank of the Sacramento River Deep Water Ship Channel.

Then southwest along the Sacramento River Deep Water Ship Channel, approximately 17 miles to T5N/R3E, to the Class 5 trail on the levee connecting the Sacramento River Deep Water Ship Channel and the dredger cut Miner Slough, approximately 2 miles from the Solano/Yolo County line.

Then east along the trail to the Miner Slough.

Then east along Miner Slough to the point where it joins Sutter Slough, then south along Sutter Slough around the tip of Sutter Island to the junction of Sutter Slough and Steamboat Slough; then north around Sutter Island along Steamboat Slough to Section 8 in T5N/R4E where Steamboat Slough joins the Sacramento River.

The southeast following the Sacramento River to the point where the Sacramento River meets the Delta Cross Channel at the Southern Pacific Railroad in Section 35, T5N/R4E.

Then northeast along the Southern Pacific Railroad for 2 miles, to a point 1/3 mile past the intersection of the Southern Pacific Railroad and the eastern branch of Snodgrass Slough.

Then east approximately 21/2 miles along the levee to Interstate 5 (under construction).

Then north approximately 81/2 miles along Interstate 5 (under construction, proposed, and completed) to Section 18 in T6N/R5E, at the intersection of Interstate 5 and Hood Franklin Road.

Then southwest along Hood Franklin Road to the Southern Pacific Railroad Levee, .1 mile northeast of Hood Junction.

Then north approximately 18 miles along the Southern Pacific Railroad Levee to Section 11 in T7N/R4E, at Freeport Blvd., and then across the Sacramento River at the line between Sections 11 and 14.

Then northwest along the west bank of the Sacramento River to Burrows Ave.

Then northwest along Burrows Ave. to the starting point at the intersection of Jefferson Blvd. and Burrows Ave.