--- kind: "section" citation: "27 C.F.R. § 9.291" title: "27" number: "9.291" heading: "Contra Costa." url: "https://uscodex.org/cfr/27/9.291" --- # §9.291. Contra Costa. - (a) **Name.** The name of the viticultural area described in this section is “Contra Costa”. For purposes of [part 4](/cfr/27/part4.md) of this chapter, “Contra Costa” is a term of viticultural significance. - (b) **Approved maps.** The 15 United States Geological Survey (USGS) 1:24,000 scale topographic maps used to determine the boundary of the Contra Costa viticultural area are titled: - (1) Antioch North, California, 2018; - (2) Antioch South, California, 2018; - (3) Benicia, California, 2018; - (4) Bouldin Island, California, 2018; - (5) Briones Valley, California, 2018; - (6) Byron Hot Springs, California, 2018; - (7) Clayton, California, 2018; - (8) Clifton Court Forebay, California, 2018; - (9) Jersey Island, California, 2018; - (10) Honker Bay, California, 2018; - (11) Tassajara, California, 2018; - (12) Vine Hill, California, 2018; - (13) Walnut Creek, California, 1995; - (14) Walnut Creek, California, 2018; and - (15) **Woodward Island, California, 2018.** - (c) **Boundary.** The Contra Costa viticultural area is located in Contra Costa County, California. The boundary of the Contra Costa viticultural area is as described as follows: - (1) **The beginning point is on the Bouldin Island map at the northernmost point of Holland Tract Road.** From the beginning point, proceed south 1.9 miles along Holland Tract Road, crossing onto the Woodward Island map, to the intersection of the road with the 10-foot elevation contour; then - (2) Proceed south-southeast in a straight line 4.1 miles to the intersection of Orwood Road and the Mokelumne Aqueduct; then - (3) Proceed south-southwest in a straight line 5.5 miles, crossing onto the Clifton Court Forebay map, to the stream gauging station on Italian Slough, just west of the Widdows Island and the shared Contra Costa-San Joaquin County line; then - (4) Proceed due west in a straight line to the western shore of Italian Slough, then proceed southwesterly along the western shore Italian Slough to its confluence with Brushy Creek; then - (5) Proceed westerly along Brushy Creek, crossing onto the Byron Hot Springs map and continuing southwesterly along the creek to its intersection with Vasco Road; then - (6) Proceed northwest in a straight line 4.3 miles to the intersection of Kellogg Creek and Walnut Boulevard; then - (7) Proceed west-southwest in a straight line 2.9 miles, crossing onto the Tassajara map, to the intersection of Marsh Creek and Miwok Trail; then - (8) Proceed northwesterly along Marsh Creek 2.4 miles, crossing onto the Antioch South map, to the creek's intersection with Deer Valley Road; then - (9) Proceed northerly along Deer Valley Road 3.1 miles to its intersection with Chadbourne Road; then - (10) Proceed northwest in a straight line 0.6 mile to the southwestern terminus of Tour Way; then - (11) Proceed northwest in a straight line 3 miles to the intersection of Oil Canyon Trail, Stewartville Trail, and Chadbourne Road; then - (12) Proceed northeasterly along Stewartville Trail 1.9 miles to its intersection with the Contra Loma Trail; then - (13) Proceed northwest in a straight line 2.5 miles to the intersection of Somersville Road and Donlan Boulevard; then - (14) Proceed west-southwest in a straight line 2.5 miles, crossing onto the Clayton map, to the intersection of Nortonville Road and Kirker Pass Road; then - (15) Proceed southwesterly along Kirker Pass Road 5 miles to its intersection with Alberta Way; then - (16) Proceed southwest in a straight line 1.5 miles to the intersection of Buckeye Trail, Blue Oak Trail, and Lime Ridge Trail; then - (17) Proceed south-southeast in a straight line 2.6 miles to the intersection of Arroyo Cerro Del and the 400-foot elevation contour just east of North Gate Road; then - (18) Proceed northwest in a straight line 2.5 miles, crossing onto the Walnut Creek map (2018 edition), to the intersection of Brodia Way and La Casa Via; then - (19) Proceed west-northwest in a straight line, crossing onto the Walnut Creek (1995 edition) map, and continue 3.1 miles on the 1995 edition map to the marked 781-foot peak south of the shared Lafayette-Walnut Creek corporate boundary line and north of an unnamed light-duty road known locally as Peaceful Lane; then - (20) Proceed northwest in a straight line 1.7 miles to the 833-foot peak marked “Hump 2”; then - (21) Proceed north-northwest 0.5 mile to the water tank (known locally as the Withers Reservoir) at the end of an unnamed light-duty road known locally as Kim Road, in the Cañada del Hambre y Las Bolsas Land Grant; then - (22) Proceed northwest in a straight line 3 miles, crossing onto the Briones Valley map, to the intersection of Alhambra Creek Road and Alhambra Valley Road; then - (23) Proceed northwest in a straight line 4.1 miles, crossing onto the Benicia map, to the intersection of Highway 4 and Cummings Skyway; then - (24) Proceed north-northwest in a straight line 1.8 miles to the intersection of Carquinez Scenic Drive and an unnamed road known locally as Canyon Lake Drive; then - (25) Proceed northeasterly in a straight line 0.6 mile to the marked post office in Port Costa; then - (26) Proceed southeast in a straight line 0.9 mile to the first unnamed road that crosses the railroad tracks and intersects with the shoreline at Little Bull Valley; then - (27) Proceed easterly along the shoreline approximately 38.3 miles, crossing over the Vine Hill, Honker Bay, and Antioch North maps and onto the Jersey Island map to Bethel Island Road; then - (28) Proceed southeast in a straight line 0.7 mile to the intersection of Wells Road and Sandmound Boulevard; then - (29) Proceed northeast in a straight line 2.7 miles, crossing onto the Bouldin Island map and returning to the beginning point. ## Notes ### Amendments [T.D. TTB-191, 89 FR 18801, Mar. 15, 2024] ### Authority Authority: 27 U.S.C. 205. ### Source Source: T.D. ATF-60, 44 FR 56692, Oct. 2, 1979, unless otherwise noted. ### Amendments [T.D. TTB-191, 89 FR 18801, Mar. 15, 2024]