2014-03-21_REVISION - M1977361

• Permit No: M1977361
• IBM Index Class Name: REVISION
• Doc Date: 3/21/2014
• Doc Name: Permit Application AM01
• From: CEMEX
• To: DRMS
• Media Type: D
• Archive: No

Permit Amendment — Cemex Sandstone Quarry
Table 13-1: Vegetation Community Present on the Permitted Mine Property
Community
Affected Area
uarry Property
Acres
% Vegetation
Community Type
within Affected Area
Acres
% Vegetation
Community Type
within Property
Upland Grassland
0.46
5%
5.73
16%
Shrubland
0.47
5%
9.75
27%
Ponderosa Pine Forest
0.46
5%
10.25
29%
Temporary Reclamation
2.25
23%
2.25
6%
Total, y et&WAcrea a
3.64
36%
27.98
78%
Rock Outcrop
0
0%
1.37
4%
Mining Disturbance
6.34
64%
6.42
18%
B -3.1.1 Upland Grassland
Upland grassy meadows make up 16% of the property, but only 5% of the area that will be disturbed for
mining and /or reclamation activities as outlined in this permit amendment. These communities are
dominated by blue grama (Bouteloua gracilis), Western wheatgrass (Pascopyrum smithii), needle and
thread grass (Heterostipa comata), fringed sage (Artemisia frigida), field sage (A. campestris), and prickly
pear cactus (Opuntia polyacantha) with only a few shrubs, primarily rubber rabbitbrush (Ericameria
nauseosa) or yucca (Yucca g /auca).
B- 3.1.2Shrubland
The grassy meadows are bordered by shrubland communities which form the transition between the
grassland and ponderosa pine forest. These communities make up only 5% of the affected area, but 27%
of the total property. The shrublands are dominated by mountain mahogany (Cercocarpus montanus),
three -leaf sumac (Rhus trilobata), and chokecherry (Prunus virginiana) with some rubber rabbitbrush
closest to the grassland where the soils become deeper.
B- 3.1.3Ponderosa Pine Forest
The ponderosa pine forest areas are the dominant on the property, covering 29% of the area. These forests
are also the most visible and thus an effort was made to minimize impacts during mining and reclamation
with only 0.46 acres (5 %) in the affected area. These forested areas are dominated by ponderosa pine
(Pinus ponderosa) growing in very rocky soils and outcrops with minimal understory. The dominant species
in the understory are similar to those in the grassland and shrubland communities and include mountain
mahogany, three -leaf sumac, needle and thread grass, Western wheatgrass, fringed sage, and prickly pear
cactus.
B-3.1.4 Temporary Reclamation
Several areas on within the Sandstone Quarry permit boundary were reclaimed in 2012. These areas were
reclaimed using methods and a seed mixture similar to that described in Exhibit D. All of these areas are
establishing well, but will likely be disturbed in the final grading design to achieve positive drainage. The
growth media will be salvaged prior to regrading.
B -3.2 Species of Concern
There are no known State or Federal listed threatened or endangered species on the Cemex Sandstone
Quarry property.
B-4 Soils
The soil information included in this permit amendment is from soil surveys performed by the Natural
Resource Conservation Service (NRCS) and obtained through their website. An overlay of the NRCS soil
mapping for the Boulder County Area has been overlain on the Sandstone Quarry base map (Figure B -3).
Mapping and soil map unit descriptions for the permit area from NRCS soil series descriptions are contained
Exhibit B B -2 • March 2014