PERMFILE40799

• Permit No: M1997054
• IBM Index Class Name: Permit File
• Section_Exhibit Name: EXHIBIT J - VEGETATION INFORMATION
• Media Type: D
• Archive: No

Parkdale Project • 3 ~ Reclamation Permit
2.0 Results
2.1 Pinyon-Juniper Vegetation Type
This vegetation type occurs primarily in the foot hills to the north of Tallahassee Creek
and on the southern portion of the bench. Dominant species include one-seed juniper
(hmiperus monospenna), pinyon pine (Pines edulis), mountain mahogany (Cercocarptes
monramr.r) and blue grama (Bouteloua gracilis). Transect numbers 1, 2, and 3 were run
in the area proposed to be disturbed by the granite quarry operation. Slopes ranged from
25 to 40 percent on south-southwest aspects. Total plant cover ranged from 2.7 percent
in areas with a high percentage of rock outcrop to 14.8 percent in more vegetated areas.
Cover afforded by litter and rock, in total, ranged from 0 to 87 percent under these same
conditions. Bare ground was also highly variable ranging from 10.3 to 85.2 percent.
Average tree heights were estimated to range from 15 to 20 feet with shrub heights
ranging from 1 to 5 feet. The shrub component of this vegetation type was heavily
hedged.
Transect number 7 was run in this community at the proposed sandstone quarry site.
Dominant community species at transect number 7 paralleled those noted above. Total
plant cover was 6.9 percent, cover by litter and rock approximately 74.1 percent, and
bare ground equal to 19.0 percent. Average tree heights were 10 to 15 feet and average
shrub heights approximately 3.5 feet.
The potential production of native understory vegetation in normal years is typically 300
pounds per acre of air-dry vegetation for this unit within the county (SCS 1995). Given
the amount of rock outcrop present on the areas proposed to be disturbed on a site
specific basis, the potential production is believed to be a maximum of 100 pounds per
acre for this site.
2.2 Shrub/Grassland Vegetation Type
Dominant species within this vegetation type include blue grama, kochia (Kochia
scopario), plains prickly pear (Optmtia polt~ocantha), and occasionally one-seed juniper.
Transect numbers 4 and 5 were selected to represent this vegetation community in the
proposed facility area near the granite quarry. Slopes were less than 2.0 percent and the
aspect was south-southwest. Total plant cover ranges from 27.6 to 35.8 percent. Bare
ground ranged from 64.2 to 72.4 percent. No ground cover was contributed by litter or
rock along either transect. Average shrub height was 2.5 feet with the shrubs heavily
hedged. Where trees occurred, their average height was 12 feet.
The potential production of native understory vegetation in normal years is typically
1,100 pounds per acre of air-dry vegetation (SCS 1995). The soil existing on site has a
higher percent of coarse fragment content than the soil mapped for the area by the SCS.
Therefore the potential production is believed to be approximately 800 pounds per acre
for this site.