PERMFILE72863

• Permit No: M2000077
• IBM Index Class Name: Permit File
• Doc Name: ENVIRONMENTAL ASSESSMENT MULE CREEK GRAVEL PIT
• Media Type: D
• Archive: No

' Mule Creek Gravel environmental Assessment • Page 15
' The productiou phase of the proposed action consists of the activities necessary to
remove gravel, prepaze and stockpile the mined material, and then remove the material
' from the site (See Figure 2.3. at the end of this report). This would include the following
activities:
1. A large bulldozer would be used to push gravel down from the top of the
existing cut slopes. The gravel will spill down the existing steep cut slope
onto the flat area at the toe of the slope. Mining will progress from the
' northern boundary of the site to the south.
2. A front-end loader would be used to move the gravel to a stockpile, a
screening plant, or directly to a truck for removal from the site.
3. A portion of the mined material would need to be screened to separate large
' rocks and insure the consistency of the material. The screening plant would
consist of atwo-deck screen with a grizzly on top. A grizzly is a metal grid
placed over the hopper on the plant and used to sepazate the largest stones
' before they enter the screening plant. A modem screening plant with the
necessary safety and dust control features would be used. Water for dust
control would be trucked from a central water system located in Divide.
'
4. If the materials removed from the site are too hard or too big to be screened, it
may be necessary to use a crusher.
' S. Mining would progress from north to south in three phases. When mining is
completed on the first third of the site and progresses into the second,
' reclamation would begin in the azea first mined. Likewise, reclamation would
begin on the second third when mining progresses to the third phase.
6. Gravel would be removed from the site in 14 to 25 ton (approximately 9 to 17
' cubic yard capacity) dump trucks. Assuming an average production rate of up
to 100,000 tons per yeaz, there would be an average of 22 trucks per day, The
' intensity of operations would be seasonal with larger production rates taking
place during the summer construction season and scaled back operations
during the winter, depending upon weather conditions.
t 7. The quarry would operate between the hours of 7:00 a.m. to 4:00 p.m.,
Monday through Friday. It is anticipated that an average of two full-time
' employees would be required to operate the site, with one or two additional
employees occasionally required for peak production periods associated with
special projects.
' The reclamatiou phase of the proposed action would follow the production phase as
mining progresses from north to south. Final reclamation will be completed one year
after mining has been completed.
The reclamation of the gravel pit will be done in accordance with applicable USDA-
' NRCS specifications, standards and guidelines. National Forest standards specific to the
' Hydrosphere Rtsoun:e Consultants, 1002 Walnut Sune 200, Boulder, CO 80302