PERMFILE115988

• Permit No: M2002087
• IBM Index Class Name: Permit File
• Doc Date: 8/13/2002
• Doc Name: Application Form
• From: Mask LLC
• To: DMG
• Media Type: D
• Archive: No

EXHIBIT B -Site Descrintioo
(a) Soils and vegetation:
The soils in the area of the proposed operation area as mapped and described by the U.S.D.A.
Soil Conservation Service consists of A2-AB -Sandy Skeletal Fluvets, 0 to 3 per cent slopes.
The A2-AB Sandy Skeletal Fluvets consists of deep, well drained soils formed on nearly level
valley bottoms bordering major drainagways. Soil formation is in recent alluvium derived
from mixed sources at elevations ranging from 6000 to 8000 feet. The soil is variable in
texture. A representative soil profile of the unit consists of a surface layer of gravelly sandy
loam about l0 inches thick underlain to a depth of more than 60 inches with sand gravel
cobble and sandy loam. Below this layer, extending to a depth of 60 inches or greater, is
mixed sand gravel, cobble and sandy loam. The available water capacity is low with
moderately rapid to rapid permeability. Runoff is slow and the hazard of water erosion is
slight.
On-site topsoil is limited as less than ] 5% of the proposed permit area has vegetative cover
(including some cottonwood, alder and juniper trees). Mixed gravel with cobbles and thin
sandy loam with sparse vegetation covers most of the surface within the proposed permit area.
Test pits at the site have shown a generally thin topsoil veneer of less than 4-6 inches (where
existing) underlain by ! 0 to 12 feet of mixed gravel/cobble aggregates. The aggregate
material is an alluvial channel bottom deposit on an elevated terrace of Mancos Shale, 10 to
l4 feet above the current level of the adjacent San Juan River channel which lies to the east of
the proposed area of operations. The aggregate material consists of sandy well rounded to
subangular gravels ranging from 2-20mm mixed with subangular to wet! rounded cobbles
ranging from 20mm up to 25cm
This specific area is described as a Riverbottom Range site. Native vegetation for this soil
type (A2-AB -Sandy Skeletal Fluvets) would consist mainly of cottonwood trees, willows,
tufted hairgrass, Sagebrush, Rabbitbrush, Westem and Slender wheatgrass, Yarrow, Blue
grams, Needle-n-Threadgrass, and Alkali sac[on with some Sedges, Redtop, and Sand
dropseed. Forbs and shrubs would include Wormwood, Fringed sage, Four-wing saltbush,
Hairy goldaster and horsetail.
Present vegetation consists primarily of Blue grama,Newile-n-Thread grass, Redtop and
Western wheatgrass, with some Sleepygrass, Fringed sagebrush, Wooly mullein, Hairy
goldaster, Current and Four-wing saltbush. Tree species currently present are Ponderosa pine,
Cottonwood and Rocky mountain juniper The total vegetative groundcover (including trees)
is approximately less than 15% of the proposed area due to the thin rocky/gravelly topsoil.
Riverbank areas have similar vegetation with the addition of some limited stands of willow
and alder.
(b) Permanent man-made structures:
The following man-made structure is within two (200) hundred feet of the area to be affected.
The location may be found on Exhibit A -Map 4.
• Mask Ranch, LLC. "Railroad Flatcar" bridge crossing the San Juan River: This bridge
provides access to the proposed permit azea as well as other areas of the Mask Ranch.
The gravel surfaced "Ranch Road" exits the Mask Ranch property to the north onto
Archuleta County Road # 119. There aze no other existing man-made structures within
200 feet of the proposed permit area.