My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
2010-04-26_PERMIT FILE - C1980007A (14)
DRMS
>
Day Forward
>
Permit File
>
Coal
>
C1980007
>
2010-04-26_PERMIT FILE - C1980007A (14)
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
8/24/2016 4:08:44 PM
Creation date
6/28/2010 2:19:28 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980007A
IBM Index Class Name
Permit File
Doc Date
4/26/2010
Doc Name
Wetland Delineation Report
Section_Exhibit Name
Exhibit 82 Appendix I
Media Type
D
Archive
Yes
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
48
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
View images
View plain text
2.0 General Environmental Setting 0 <br />The following section describes mapped and documented data on the project area, including geology, <br />hydrology, mapped soil units, and available natural vegetative community data. <br />2.1 Geology <br />"No Name Gulch" project area bedrock is primarily composed of sandstone, and secondarily by <br />shale. Both are sedimentary rocks composed of sand -sized or finer (silt or clay) minerals. The <br />geologic unit primary to the project area is Mesaverde FM, Undivided, which originated in the <br />Cretaceous period. It is noted for containing major coal beds or seams, with coal being the tertiary <br />rock underlying the sandstone and shale (USGS 1992). <br />The project area ranges in elevation from approximately 6,100 feet above mean sea level (AMSL), at <br />the northwest corner, to approximately 7,940 feet AMSL at the southeast corner, as shown in the <br />topographic map in Figure 3. The side slopes of the Gulch are very steep, averaging 40 -60° or more, <br />and extend for a distance of approximately one - quarter mile from top to bottom. The thalweg of the <br />gulch is only slightly less steep, ranging from 30 -50 °, and extends for approximately one mile, from <br />the highest crest in the south to the lowest point in the north, near the North Fork Gunnison River. <br />Photos of the east and west slopes and thalweg of "No Name Gulch" are included in Appendix A. <br />2.2 Hydrology <br />The "No Name Gulch" project area drains south to north towards the North Fork Gunnison River. <br />One 42 -inch culvert beneath Highway 133 allows for drainage from the gulch to the North Fork <br />Gunnison River. A visual inspection of the vegetation, drainage patterns, and sedimentation in the <br />culvert and connecting ditches indicates that the culvert and ditches do not appear to convey a lot of <br />water, and may even be effectively blocked by spoil side cast resulting from onsite road construction. <br />As a whole, the "No Name Gulch" project area is somewhat xeric, especially in higher reaches. The <br />most significant source of water in the gulch is most likely snowmelt. The U.S. Geological Survey <br />Quadrangle map ( "Somerset" Quad) (Figure 4) indicates that the center of the gulch is intermittently <br />flowing. It stands to reason that most of the year, the thalweg of the gulch would be mesic to dry, but <br />during the late spring and early summer, as snowmelt runs down the gulch, collecting in the thalweg, <br />the lower (northernmost) reaches of the thalweg may experience muddy conditions and seasonal <br />flow, that may or may not ultimately reach the culvert and North Fork Gunnison River. In addition to <br />rainfall, another source of hydrology, albeit very minor, includes the occasional subsurficial flow of <br />
The URL can be used to link to this page
Your browser does not support the video tag.