2008-03-03_PERMIT FILE - C2006085 ‎(2)‎

• Permit No: C2006085
• IBM Index Class Name: Permit File
• Doc Date: 3/3/2008
• Section_Exhibit Name: 2.04 Information on Environmental Resources
• Media Type: D
• Archive: No

flow their source areas through the permit area, stream gradients
generally decrease fairly rapidly. Stream channels widen and
suspended solids levels increase as a result of decreased ground cover
on lowland areas and natural erosion processes occurring in the down
gradient channel portions.
Chandler Crreek is the only drainage with a sufficiently large drainage
area to develop perennial steam flows. Since the lowland and tributary
drainages to Chandler Creek are ephemeral in nature, the entire
drainage system flows only in response to spring snowmelt and major
summer thunderstorm events.
Precipitations and surface runoff attributes for the proposed permit area
and adjacent areas are typical of a high altitude, semi-arid
environment. Site specific climatological information is not available for
the permit urea, however precipitation and temperature records are
available for the nearby towns of Canon City and Florence. Given the
proximity of the reporting stations and the climatic similarities within
this limited area, the available information is considered as
representative of conditions at the proposed permit area. A review of
the focal climatological data indicates that average annual precipitation
for this area is approximately 12.6 inches with most of the
precipitation occurring during the spring and summer months. The
average annnual temperature for the area is 55 degrees, with recorded
minimum and maximum readings of -25 and 106 degrees. Prevailing
wind direction during most of the year is from the west, except during
the summer months when prevailing winds shift to a southeasterly
direction. Vllind velocity averages less than 10 miles per hour annually,
with occasional gusts reaching approximately 65 miles per hour.
The majority of the drainage basin is covered by surface deposits of
poorly to moderately consolidated colluvial/alluvial materials, and
weathered ~~nd well-jointed sandstone outcrops. Much of the limited
precipitation the area receives either infiltrates into these relatively
porous dep~~sits or is lost through evaporation and transpiration. These
conditions significantly reduce runoff and are reflected in the surface
hydrologic system of the entire area.
Chandler Creek is the primary drainage within the area, and is the only
drainage with substantial differences between its upper and lower
portions. Theis stream system exhibits significant changes in flow
velocities and water quality between the upper headwater and lower
transitional segments. Generally, the higher precipitation rates, heavy
• vegetative cover and relatively steep granodioritic rock slopes in
2.04-24 Revised 11/05/07