2023-10-03_REVISION - M1977344 ‎(6)‎

• Permit No: M1977344
• IBM Index Class Name: Revision
• Doc Date: 10/3/2023
• Doc Name Note: 2.9 Exhibit I - Soils Information
• Doc Name: Request For Amendment To Permit
• From: Holcim ‎(US)‎ Inc.
• To: DRMS
• Type & Sequence: AM2
• Email Name: TC1
• Email Name: MAC
• Media Type: D
• Archive: No

Bear Creek Quarry (M-1977-344) Permit Amendment
Holcim US Inc, 3500 Highway 120, Florence, CO 81226
Phone [phone] www.holcim.us 74
2.9.1.6 Penrose Series
The Penrose series consists of shallow, well drained soils on breaks, ridges, plains, hogbacks,
and canyon sides. These soils formed in residuum derived from limestone. Slopes range from 2 to
40 percent. The average annual precipitation is 11 to 14 inches, and the average annual air
temperature is 50 to 53°F. The soils are loamy, carbonatic, mesic Lithic Ustic Torriorthents. The A
horizon is mildly alkaline or moderately alkaline.

2.9.1.7 Shanta Series
The Shanta series consists of deep, well drained soils on stream terraces. These soils formed in
alluvium. Slopes range from 0 to 4 percent. The average annual precipitation is 12 to 15 inches,
and the average annual air temperature is 48 to 53°F. The soils are fine-loamy, mixed, mesic
Cumulic Haplustolls.

2.9.1.8 Shingle Series
The Shingle series consists of shallow, well drained soils on plains, breaks, and foot slopes and
on the side slopes of hilly remnants of fan terraces. These soils formed in residuum derived from
interbedded shale and sandstone. Slopes range from 3 to 40 percent. The average annual
precipitation is 11 to 14 inches, and the average annual air temperature is 50 to 53°F. The soils
are loamy, mixed (calcareous), mesic, shallow Ustic Torriorthents.

2.9.2 Pueblo County Soils
Three of the sixteen soil types within the Mining Permit and Affected Area Boundary are in Pueblo County.
Below are descriptions of the relevant soil series from the USDA NRCS Soil Survey of Pueblo Area,
Colorado, Parts of Pueblo and Custer Counties (USDA 1979).

2.9.2.1 Las Animas Series (similar to Fremont County Aquic Ustifluvents)
The Las Animas series consists of deep, somewhat poorly drained soils. These soils formed on
bottom lands in loamy alluvium. The slope is 0 to 2 percent, and elevation is 4,300 to 4 ,900 feet.
The average annual precipitation is 12 inches. The average annual temperature is 53° F, and the
frost-free season is 155 to 165 days. The native vegetation is salt -tolerant grasses and woody
plants.

2.9.2.2 Riverwash
This soil is found in streams and is derived from stream alluvium. Its texture is sandy to sandy
loam. It is somewhat poorly drained with slopes of one to three percent. Riverwash is a nonsaline
soil with calcium carbonate content below one percent (USACE 2013).

2.9.2.3 Wilid Series (formerly Wiliey Series)
The Wiley series consists of deep, well-drained soils that formed in loess on sandstone uplands.
The slope is 1 to 4 percent, and elevation is 4,400 to 5,200 feet. The average annual precipitation
is 12 inches. The average annual temperature is 53° F, and the frost-free season is 145 to 175
days. The native vegetation is mainly short plains grasses. These soils are used for grazing.