California Code of Regulations
Title 14 - Natural Resources
Division 2 - Department of Conservation
Chapter 8 - Mining and Geology
Subchapter 1 - State Mining and Geology Board
Article 2 - Areas Designated to be of Regional Significance
Section 3550.11 - Construction Aggregate Resources, North San Francisco Bay Region
The areas for changes in designation, and termination of designation, are shown on three plates: Plate 1 (July 2015), Updated Designation in the North San Francisco Bay Production-Consumption Region, Marin, Napa, Sonoma and Southwestern Solano Counties, California -- Northern Part; Plate 2 (July 2015), Updated Designation in the North San Francisco Bay Production-Consumption Region, Marin, Napa, Sonoma and Southwestern Solano Counties, California -- Central Part; and Plate 3 (July 2015), Updated Designation in the North San Francisco Bay Production-Consumption Region, Marin, Napa, Sonoma and Southwestern Solano Counties, California -- Northwestern and Southeastern Part.
The construction aggregate deposits in the following areas are designated as being of regional significance:
Sector A -- Channel and floodplain alluvium deposits located in Alexander Valley of Sonoma County; extends from approximately the City of Cloverdale downstream to a point 3.25 miles southeast of the community of Jimtown.
Sector B except for the subsectors referenced below that have had their designation terminated -- Alluvial deposits of the middle reach of the Russian River and a small portion of Dry Creek 0.5 miles west of Healdsburg. The sector extends from the City of Healdsburg down the Russian River to a point near the Wohler Road Bridge.
Sectors D-1 and D-2a -- Consists of Novato Conglomerate deposits located near Black Point in eastern Marin County.
Sector F -- A small aggregate deposit located west of the City of Cotati on Stony Point Road in Sonoma County.
Sector G -- Three contiguous parcels consisting of metamorphosed graywacke and greenstone deposits located east of the City of Vallejo at the southern end of Sulphur Springs Mountain.
Sector H -- Aggregate deposit located southeast of the City of Napa in Napa County.
Sector I -- Metamorphosed sandstone deposit located on Point San Pedro in eastern Marin County.
Sector K-1 -- Area east of Dunbar Union School and northeast of the community of Glen Ellen in Sonoma County.
Sector K-2 -- Area east of Dunbar Union School and northeast of the community of Glen Ellen in Sonoma County.
Sector L -- Small greenstone and pillow lavas deposits located in Millerton Gulch approximately 3.5 miles north of the community of Point Reyes Station in Marin County.
Sector M -- A small serpentinite deposit located in upper Bowman Canyon on Burdell Mountain approximately three miles northwest of Novato in Marin County.
Section N -- A small siltstone deposit located approximately one mile west of the community of Forestville and south of Highway 116.
Sector O -- A small siltstone deposit located approximately one mile west of the community of Forestville and north of Highway 116.
Sector P -- Located along the west side of Green Valley approximately three miles southwest of Forestville in Sonoma County.
Sector R -- Located approximately 2.5 miles southeast of the City of Petaluma in Sonoma County.
Sector S -- Located approximately five miles west of Petaluma on Petaluma Creek Road in Sonoma County.
Sector T -- Sandstone deposits located 1.5 miles north of Duncan Mills on Austin Creek in western Sonoma County.
Sector U -- Located at the confluence of the South Fork and Wheatfield Fork of the Gualala River in northwestern Sonoma County.
Sector V-1a -- Consists of andesite located on Burdell Mountain approximately two miles north of the City of Novato in Marin County.
Sector W -- Located on Porter Creek Road approximately four miles east of the community of Mark West Springs in eastern Sonoma County.
Sector X-1a -- Consists of sandstone and andesite located along Highway 121 approximately 2.5 miles north of Sears Point in southeastern Sonoma County.
Sector Y -- Shale deposit located approximately 2.5 miles west of Healdsburg in Sonoma County.
Sector AA -- Includes subsectors AA-1, AA-2, and AA-3, and comprised of alluvial deposits along the Gualala River in northwestern Sonoma County.
Sector DD -- Includes subsectors DD-1 and DD-2, and is located on Porter Creek Road approximately four miles east of the community of Mark West Springs in Sonoma County.
Sector EE -- Located approximately one mile west of the community of Forestville and south of Highway 16.
Sector FF -- Located approximately one mile west of the community of Forestville and north of Highway 16.
Sector GG -- Located approximately 1.5 miles north of Duncan Mills on Austin Creek in western Sonoma County.
Sector HH -- Located approximately 1.5 miles north of Duncan Mills on Austin Creek in western Sonoma County.
Sector II -- Located approximately 1.5 miles north of Duncan Mills on Austin Creek in western Sonoma County.
Sector JJ -- Located west of the City of Cotati on Stony Point Road in Sonoma County.
Sector KK -- An area south of Roblar Road approximately five and a quarter miles west of the City of Cotati in Sonoma County.
Sector LL -- An area south of Roblar Road approximately four and a half miles west of the City of Cotati in Sonoma County.
Sector MM -- Located southeast of the City of Napa in Napa County.
The following areas have had their designation terminated:
Sector B incorporating parts of Sectors B-2a, B-2b, B-2c, B-2d, B-4d and B-4e -- Located along the Middle Reach of the Russian River from Healdsburg south to its confluence with Mark West Creek: There are five areas terminated in Sector B-2a; two areas terminated in Sector B-2b; four areas terminated in Sector B-2c; two areas terminated in Sector B-2d; three areas terminated in Sector B-4d; and one area terminated in Sector B-4e. Also, including surrounding areas to all portions of both Sectors B-2 and B-4e, south of Dry Creek and west of the Russian River, corresponding to a conservation easement area.
Sectors C-2a and C-3 -- Sector C-2a along Sonoma Creek, north of the City of Sonoma and Sector C-3 on the northwestern edge of the City of Sonoma. These two areas have been terminated.
Sector D-2b -- This sector at the southern end of a prominent ridge in the easternmost part of the City of Novato has been terminated.
Sector E -- This Sector is at the northern end of Petaluma Hill and is mostly within the City of Petaluma. Sector E has been terminated.
Sector J -- This Sector is at the eastern end of Burdell Mountain. This Sector has been terminated.
Sector Q -- This Sector is north of Highway 1, about 2.5 miles east of the community of Bodega Bay. The Sector has been terminated.
Sector V (partial) -- This Sector (V-1b) is on Burdell Mountain. Six acres of the Sector have been terminated.
Sector X (partial) -- This Sector (X-1b) is on the east side of Highway 121, about seven miles south of Sonoma. The northern portion of the Sector has been terminated.
1. New section filed 12-3-86, effective thirtieth day thereafter (Register 86, No. 49).
2. Amendment of section and NOTE filed 2-9-2016; operative 4-1-2016 (Register 2016, No. 7).
Note: Authority cited: Sections 2790 and 2793, Public Resources Code. Reference: Sections 2726, 2761- 2763 and 2790- 2792, Public Resources Code.
