PERMFILE40799

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

Parkdale Protect • 4 • Reclamation Permit
2.3 Stream Wash Vegetation Type
The Stream Wash vegetation type occurs primarily along Tallahassee Creek in the
floodplain above the main channel. This type is subject to scouring and receives deposits
of alluvium during flooding (SCS 1995). As such, the vegetation extant is sparse and is
primarily limited to shrub and tree species along with annual weedy fortis. The dominant
species include rubber rabbitbtvsh (Chrysothamnus nauseosus), four-wing saltbush
(Atripler canescens), leafy spurge (Euphorbia esula), and kochia A few scattered
tamarisk (Tamarix ramosissima) also occur. Proposed disturbance to this vegetation type
would be minimal and be limited to two river crossings. No transects were run in this
type.
The potential production of native understory vegetation was not rated for this type of
soil map unit by the SCS. The production potential of this unit is assumed to be
negligible.
2.4 Riparian Vegetation Type
The Riparian vegetation type occurs along Tallahassee Creek, primarily as a
comparatively large, neazly level floodplain bench above the main channel. The
dominant species include tamarisk, plains cottonwood (Populus sargentii), peach-leaf
willow (Salix amygdoloides), and rubber rabbitbrush. This vegetation type is not
proposed to be disturbed. No transects were located in this type for characterization
purposes.
The potential production of native understory vegetation was not rated for this type of
soil map unit by the SCS. The forage production potential of this unit is assumed to be
negligible.
2.5 Grassland Vegetation Type
Dominant species within this vegetation type include blue grama, tree cholla
(Cvlindropunria imbricata), and kochia where soils are disturbed by livestock. Transect
number 8 was selected to represent this vegetation community in the proposed facility
area south of Tallahassee Creek. Slopes were nearly level. Total plant cover was 30.7
percent while bare ground was 66.2 percent. Litter and rock contributed 3.2 percent
ground cover.
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.