Seiad Valley
AVA · Siskiyou County · District 9
27 CFR 9.148 · established 1994-05-19
Heat class II · 1991-2020 normals
Climate normals in three numbers
, Apr 1 – Oct 31
5 GridMET cells cover this region
season rain, Apr 1 – Oct 31
93 mm of it in the , Sep 1 – Oct 31
Warm and cool vintages since 1980
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Rain across the season, and at harvest
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The boundary
Measured vineyard area
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Drought categories, year by year
Siskiyou County — not Seiad Valley
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What's in the ground
6.1
pH, 1:1 water
12.6cm
, whole profile
169cm
to
Well drained
, dominant condition
Distribution across 16 · mean ◆, median │, p10–p90 bar
Dominant
- 61.2%
- 17.5%
- 11.9%
- 4.8%
- 4.1%
16 map units · soil described over 83.4% of the region’s area · 30.2% is water, rock outcrop or other non-soil · 35% of the described area has a restrictive layer within the profile.
Sand, silt and clay, against every other appellation
Sandy loam
57% sand · 25% silt · 18% clay
Sandier than 85% of California appellations and clayier than 18%. Each grey point is one appellation’s topsoil; appellations nest, so this is a distribution of places rather than of land.
Plus 29% rock fragments by volume, which the triangle does not describe — the three fractions are of the fine-earth material only.
Elevation, slope and aspect
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Bearing acreage by variety
Siskiyou County · District 9
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Price per ton
Siskiyou County · District 9
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The appellation in federal law
The boundary, in the government’s own words (376 words)
(c) Boundary. The Seiad Valley viticultural area is located in Siskiyou County, California. The boundary is as follows: (1) The beginning point is the intersection of the 1600 foot contour line with the power transmission line north of the Klamath River, near Mile 130; (2) From the beginning point, the boundary follows the 1600′ contour line in a generally northeasterly direction until it reaches the intersection of an unnamed light duty road and an unimproved road just west of Canyon Creek; (3) The boundary then follows the unimproved road north to its end, then goes east in a straight line until it reaches the 1800′ contour line; (4) The boundary then follows the 1800′ contour line in a northeasterly direction to the point, near Sawmill Gulch, where the contour line crosses Seiad Creek and turns south and west; (5) The boundary continues to follow the 1800′ contour line as it proceeds southwest for approximately 4.5 miles, then turns sharply south-southeast for approximately 0.3 miles, until the contour line turns sharply east at a point just north of the Klamath River; (6) The boundary then diverges from the 1800′ contour line and proceeds south-southeast in a straight line, across the Klamath River and State Route 96, until it intersects with the 1600′ contour line; (7) The boundary then follows the 1600′ contour line south and west, then north and west, roughly following the course of the Klamath River, until it reaches an unnamed peak 1744 feet high; (8) The boundary continues along the 1600′ contour line as it diverges from the Klamath River and proceeds south, just to the east of an unnamed light duty road, to the point where that road crosses Grider Creek; (9) The boundary diverges from the contour line and proceeds west in a straight line across the road and Grider Creek until it intersects with the 1600′ contour line on the west side of Grider Creek; (10) The boundary then follows the 1600′ contour line north, west and north again until it reaches a point where the contour line turns west, just south of the Klamath River; (11) The boundary diverges from the 1600′ contour line and proceeds in a straight line in a northeasterly direction, back to the point of beginning.