PERMFILE68700

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 7/30/2007
• Doc Name: Taxonomic Unit Descriptions
• Section_Exhibit Name: Section 2.04.9 Attachment 2.04.9-3
• Media Type: D
• Archive: Yes

•
BEGAY SERIES
LOCATION BEGAY UT+AZ, CO
Established Series
Rev. RLM/GWURLB
4/98
The Begay series consists of very deep, well drained, moderately rapidly permeable soils that formed in eolian
deposits, derived mainlyfrom sandstone. Begay soils are on structural benches and broad mesas and have slopes
of 0 to 30 percent. The average annual precipitation is about 12 inches, and the mean annual temperature is about
48 degrees F.
AXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Ustic Haplocambids
TYPICAL PEDON: Begay loamy fine sand, rangeland. (Colors are for air-dry soil unless otherwise noted.)
A-0 to 3 inches; yellowish red (5YR 5/6) loamyfine sand, yellowish red (5YR 4/6) moist; single grained; loose; very
slightly effervescent, carbonates are disseminated; moderatey alkaline (pH 7.9); clear smooth boundary. (2 to 5
inches thick)
Bw-3 to 16 inches; yellowish red (5YR 5/6) very fine sandy loam, yellowish red (5YR 4/6) moist; weak medium
• subangular blocky structure; soft, friable; common fine roots; few fine pores; slightly alkaline (pH 7.8); Gear wavy
boundary. (11 to 17 inches thick)
Bk1-16 to 28 inches; yellowish red (5YR 5/6) very fine sandy loam, yellowish red (5YR 4/6) moist; weak medium
subangular blocky structure; slightly hard, firm; few fine roots; common fine pores; very slightly effervescent,
carbonates are disseminated; moderate) alkaline (ph 7.9); gradual wavy boundary. (10 to 14 inches thick).
Bk2-28 to 42 inches; yellowish red (5YR 5/6) very fine sandy loam, yellowish red (5YR 4/6) moist; weak medium
subangular blocky structure; slightly hard, firm; few fine roots;common fine pores; very slightly effervescent;
carbonate strongly effervescent, moderately alkaline (pH 8.0); gradual wavy boundary. (12 to 16 inches thick)
C-42 to 60 inches; yellowish red (5YR 5/8) very fine sandy loam, yellowish red (5YR 418) moist; massive; soft, very
friable; few fine pores; very slightly effervescent, carbonates are disseminated; strongly alkaline (pH 8.1 ).
TYPE LOCATION: San Juan County, Utah; 7 miles east and 5 miles north of Navajo Mountain School; SW 1/4,
SE 1/4 sec. 31, T. 42 S., R. 17 E.
RANGE IN CHARACTERISTICS: The mean annual soil temperature ranges from 47 to 57 degrees F. The mean
summer soil temperature at a depth of 20 inches ranges from 61 to 65 degrees F. In 7 out of 10 years the soils are
dry in all parts of the moisture control section for 50 to 75 percent of the time (cumulative) that the soil temperature
• at depth of 20 inches is above 41 degrees F. The soils are moist in some part of the moisture control section for
(Revised March 2006) Attachment 2.04.9-3-6