2012-01-06_PERMIT FILE - C1982057 ‎(16)‎

• Permit No: C1982057
• IBM Index Class Name: Permit File
• Doc Date: 1/6/2012
• Section_Exhibit Name: TAB 09 SOIL BASELINE STUDY
• Media Type: D
• Archive: No

The second alluvial soil in the Hubberson Gulch irrigated area is Hunchback clay loam (sample
• site HG2, map unit 1561. Hunchback is located in several poorly drained areas within the
irrigated hayland along Hubberson Gulch. Hunchback comprises approximately 14 percent of
the irrigated area. During 1997 these areas were too wet for hay harvest. At the time of
sampling 110-10-971, free water was observed at a depth of approximately 12 inches.
Hunchback has an approximate 16 to 25 inch surface layer with clay loam or clay texture. The
profile of HG2 was gleyed below 4 inches and has clay loam, silty clay, or clay textures to a
depth of approximately 110 inches. The profile was also generally reduced below 4 inches due
to its poorly drained nature. Hunchback is also non-saline and non-sodic. It is classified as a
"fine smectitic, Cumulic Cryaquoll" and is considered a hydric soil ISCS 19931.
The third alluvial soil in the Hubberson Gulch irrigated area is Silas clay loam (sample site HG4,
map unit 27A}, and it comprises approximately 9.4 percent of the irrigated area. Il is located
upstream of the Smith ranch house in the field to the east-southeast. Silas is described in
Appendix 9-3. The HG4 profile was not reduced, and it was not gleyed until a depth of
approximately 98 inches. Free water was also observed at approximately 98 inches.
Two other short reaches of stream drainages exist within the Seneca soil survey study area and
they also contain unconsolidated streamlain deposits. The first is part of upper Hubberson
Gulch in the southwest corner of the study area (Section 341. There is no agricultural use
• (irrigation or pastureland) of this reach of Hubberson Gulch. The second is a tributary drainage
to Sage Creek that occurs in Section 14 in the northeast corner of the study area. Neither of
these drainages will be disturbed.
Map Unit Descriptions and Soil Interpretations. Map units are depicted by map symbol, name,
and slope percentage in Table 9-3, Guide to and Areal Extent of Soil Map Units Identified for
the Seneca II-W Soil Survey, October 1990. The areal extent of each map unit in acres is also
provided in Table 9-3. Table 9-3A presents the areal extent of each map unit for Seneca II-W
South Extension area. Detailed descriptions of each map unit are provided in Appendix 9-2,
Table 1, Soil Map Unit Characteristics. Information for Hubberson Gulch map units 52A and
156 are presented addendums at the end of each table. These descriptions are presented in
numerical order by map unit symbol and include:
• Map unit symbol and name with associated slope range
• Major map unit components and their percentages
• Map unit inclusions and their percentages
• Slope and physiography (terrain) description
• Parent material type
• Land capability classification
• • Range site classification
19 flevised 9/98